<PAGE>

                                                                     EXHIBIT 4.6

================================================================================

                  CAPITAL AUTO RECEIVABLES ASSET TRUST 2005-SN1

                                 TRUST AGREEMENT

                                     BETWEEN

                         CAPITAL AUTO RECEIVABLES, INC.

                                     SELLER

                                       AND

                      DEUTSCHE BANK TRUST COMPANY DELAWARE

                               CARAT OWNER TRUSTEE

                           DATED AS OF APRIL 28, 2005

================================================================================

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                                TABLE OF CONTENTS

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ARTICLE I             DEFINITIONS AND INCORPORATION BY REFERENCE................................................           1

         Section 1.1           Definitions......................................................................           1

ARTICLE II            ORGANIZATION..............................................................................           1

         Section 2.1           Name.............................................................................           1

         Section 2.2           Office...........................................................................           1

         Section 2.3           Purposes and Powers..............................................................           1

         Section 2.4           Appointment of CARAT Owner Trustee...............................................           2

         Section 2.5           Initial Capital Contribution of CARAT Owner Trust Estate.........................           2

         Section 2.6           Declaration of Trust.............................................................           2

         Section 2.7           Liability of the CARAT 2005-SN1 Certificateholders...............................           3

         Section 2.8           Title to Trust Property..........................................................           3

         Section 2.9           Situs of Trust...................................................................           3

         Section 2.10          Representations and Warranties of the Seller.....................................           3

         Section 2.11          Tax Treatment....................................................................           4

ARTICLE III           THE CARAT 2005-SN1 CERTIFICATES...........................................................           5

         Section 3.1           Initial Beneficial Ownership.....................................................           5

         Section 3.2           Form of the CARAT 2005-SN1 Certificates..........................................           5

         Section 3.3           Execution, Authentication and Delivery...........................................           5

         Section 3.4           Registration; Registration of Transfer and Exchange of CARAT 2005-SN1
                               Certificates.....................................................................           6

         Section 3.5           Mutilated, Destroyed, Lost or Stolen CARAT 2005-SN1 Certificates.................           7

         Section 3.6           Persons Deemed CARAT 2005-SN1 Certificateholders.................................           8

         Section 3.7           Access to List of CARAT 2005-SN1 Certificateholders' Names and Addresses.........           9

         Section 3.8           Maintenance of Corporate Trust Office............................................           9

         Section 3.9           Appointment of Paying Agent......................................................           9

         Section 3.10          Seller as CARAT 2005-SN1 Certificateholder.......................................          10

ARTICLE IV            ACTIONS BY CARAT OWNER TRUSTEE............................................................          10

         Section 4.1           Prior Notice to CARAT 2005-SN1 Certificateholders with Respect to Certain
                               Matters..........................................................................          10
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                                TABLE OF CONTENTS
                                  (continued)

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         Section 4.2           Action by CARAT 2005-SN1 Certificateholders with Respect to Certain
                               Matters..........................................................................          11

         Section 4.3           Action by CARAT 2005-SN1 Certificateholders with Respect to Bankruptcy...........          11

         Section 4.4           Restrictions on CARAT 2005-SN1 Certificateholders' Power.........................          11

         Section 4.5           Majority Control.................................................................          11

ARTICLE V             APPLICATION OF TRUST FUNDS; CERTAIN DUTIES................................................          12

         Section 5.1           Establishment of Certificate Distribution Account................................          12

         Section 5.2           Application of Trust Funds.......................................................          12

         Section 5.3           Method of Payment................................................................          13

         Section 5.4           Accounting and Reports to the CARAT 2005-SN1 Certificateholders, the
                               Internal Revenue Service and Others..............................................          13

         Section 5.5           Signature on Returns; Other Tax Matters..........................................          14

ARTICLE VI            THE CARAT OWNER TRUSTEE...................................................................          14

         Section 6.1           Duties of CARAT Owner Trustee....................................................          14

         Section 6.2           Rights of CARAT Owner Trustee....................................................          15

         Section 6.3           Acceptance of Trusts and Duties..................................................          15

         Section 6.4           Action Upon Instruction by CARAT 2005-SN1 Certificateholders.....................          17

         Section 6.5           Furnishing of Documents..........................................................          18

         Section 6.6           Representations and Warranties of CARAT Owner Trustee............................          18

         Section 6.7           Reliance; Advice of Counsel......................................................          19

         Section 6.8           CARAT Owner Trustee May Own CARAT 2005-SN1 Certificates and CARAT
                               2005-SN1 Notes...................................................................          19

         Section 6.9           Compensation and Indemnity.......................................................          20

         Section 6.10          Replacement of CARAT Owner Trustee...............................................          20

         Section 6.11          Merger or Consolidation of CARAT Owner Trustee...................................          21

         Section 6.12          Appointment of Co-Trustee or Separate Trustee....................................          21

         Section 6.13          Eligibility Requirements for CARAT Owner Trustee.................................          23

ARTICLE VII           TERMINATION OF TRUST AGREEMENT............................................................          23

         Section 7.1           Termination of Trust Agreement...................................................          23

ARTICLE VIII          AMENDMENTS................................................................................          24

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                                TABLE OF CONTENTS
                                  (continued)

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         Section 8.1           Amendments Without Consent of Certificateholders or Noteholders..................          24

         Section 8.2           Amendments With Consent of CARAT 2005-SN1 Certificateholders and CARAT
                               2005-SN1 Noteholders.............................................................          25

         Section 8.3           Form of Amendments...............................................................          25

ARTICLE IX            MISCELLANEOUS.............................................................................          26

         Section 9.1           No Legal Title to CARAT Owner Trust Estate.......................................          26

         Section 9.2           Limitations on Rights of Others..................................................          26

         Section 9.3           Derivative Actions...............................................................          26

         Section 9.4           Notices..........................................................................          26

         Section 9.5           Severability.....................................................................          27

         Section 9.6           Counterparts.....................................................................          27

         Section 9.7           Successors and Assigns...........................................................          27

         Section 9.8           No Petition......................................................................          27

         Section 9.9           No Recourse......................................................................          27

         Section 9.10          Headings.........................................................................          28

         Section 9.11          Governing Law....................................................................          28

         Section 9.12          Indemnification by and Reimbursement of the Trust Administrator..................          28

         Section 9.13          Effect of Amendment and Restatement..............................................          28

         Section 9.14          Transfer Restrictions on CARAT 2005-SN1 Certificates.............................          29
</TABLE>

                                    EXHIBITS

EXHIBIT A   Form of CARAT 2005-SN1 Certificate

EXHIBIT B   CARAT 2005-SN1 Certificate of Capital Auto Receivables Asset
            Trust 2005-SN1
EXHIBIT C   Form of Undertaking Letter

                                     -iii-

<PAGE>

            TRUST AGREEMENT, dated as of April 28, 2005, between CAPITAL AUTO
RECEIVABLES, INC., a Delaware corporation, as Seller, and DEUTSCHE BANK TRUST
COMPANY DELAWARE, a Delaware banking corporation, as trustee and not in its
individual capacity (the "CARAT Owner Trustee").

            WHEREAS, the Seller and CARAT Owner Trustee previously entered into
a certain trust agreement dated April 4, 2005 (the "Original Trust Agreement"),
which contemplated this Trust Agreement; and

            WHEREAS, the Seller and the CARAT Owner Trustee desire hereby to
amend and restate the Original Trust Agreement in its entirety.

            NOW, THEREFORE, the Seller and the CARAT Owner Trustee hereby agree
as follows:

                                   ARTICLE I
                   DEFINITIONS AND INCORPORATION BY REFERENCE

      Section 1.1 Definitions. Certain capitalized terms used in this Agreement
shall have the respective meanings assigned to them in Part I of Appendix A to
the Trust Sale and Administration Agreement, dated as of the date hereof, among
the Seller, the Trust Administrator and the Trust (the "Trust Sale and
Administration Agreement"). All references herein to "the Agreement" or "this
Agreement" are to this Trust Agreement, and all references herein to Articles,
Sections and subsections are to Articles, Sections and subsections of this
Agreement unless otherwise specified. The rules of construction set forth in
Part II of such Appendix A shall be applicable to this Agreement.

                                   ARTICLE II
                                  ORGANIZATION

      Section 2.1 Name. The Trust created hereby shall be known as "Capital Auto
Receivables Asset Trust 2005-SN1" in which name the CARAT Owner Trustee may
conduct the business of the Trust, make and execute contracts and other
instruments on behalf of the Trust and sue and be sued on behalf of the Trust.
The CARAT Owner Trustee is hereby authorized to file the Certificate of Trust on
behalf of the Trust pursuant to Section 3810(a) of the Statutory Trust Act.

      Section 2.2 Office. The office of the Trust shall be in care of the CARAT
Owner Trustee at the Corporate Trust Office or at such other address in Delaware
as the CARAT Owner Trustee may designate by written notice to the CARAT 2005-SN1
Certificateholders and the Seller.

      Section 2.3 Purposes and Powers. The purpose of the Trust is, and the
Trust shall have the power and authority, to engage in the following activities:

            (a) to acquire, manage and hold the COLT 2005-SN1 Secured Notes and
the other assets of the Trust;

<PAGE>

            (b) to issue the CARAT 2005-SN1 Notes pursuant to the CARAT
Indenture and the CARAT 2005-SN1 Certificates pursuant to this Agreement, and to
sell, transfer or exchange the CARAT 2005-SN1 Notes and the CARAT 2005-SN1
Certificates;

            (c) to make payments to the CARAT 2005-SN1 Noteholders and the CARAT
2005-SN1 Certificateholders, and to pay the organizational, start-up and
transactional expenses of the Trust;

            (d) to assign, grant, transfer, pledge, mortgage and convey the
CARAT Trust Estate pursuant to the terms of the CARAT Indenture and to hold,
manage and distribute to the CARAT 2005-SN1 Certificateholders pursuant to the
terms of this Agreement and the Trust Sale and Administration Agreement any
portion of the CARAT Trust Estate released from the lien of, and remitted to the
Trust pursuant to, the CARAT Indenture;

            (e) to enter into and perform its obligations and exercise its
rights under the CARAT Basic Documents to which it is to be a party;

            (f) to enter into any interest rate swaps and caps and other
derivative instruments in connection with the CARAT 2005-SN1 Notes and the CARAT
2005-SN1 Certificates;

            (g) to engage in those activities, including entering into
agreements, that are necessary, suitable or convenient to accomplish the
foregoing or are incidental thereto or connected therewith; and

            (h) subject to compliance with the CARAT Basic Documents, to engage
in such other activities as may be required in connection with conservation of
the CARAT Owner Trust Estate and the making of distributions to the
Securityholders.

            The Trust shall not engage in any activity other than in connection
with the foregoing or other than as required or authorized by the terms of this
Agreement or the CARAT Basic Documents.

      Section 2.4 Appointment of CARAT Owner Trustee. The Seller hereby appoints
the CARAT Owner Trustee as trustee of the Trust effective as of the date hereof,
to have all the rights, powers and duties set forth herein.

      Section 2.5 Initial Capital Contribution of CARAT Owner Trust Estate. The
Seller has sold, assigned, transferred, conveyed and set over to the CARAT Owner
Trustee, as of April 28, 2005, the sum of $1. The CARAT Owner Trustee hereby
acknowledges receipt in trust from the Seller, as of April 28, 2005, of the
foregoing contribution, which constituted the initial CARAT Owner Trust Estate
and has been or will be deposited in the Certificate Distribution Account. The
Seller shall pay organizational expenses of the Trust as they may arise or
shall, upon the request of the CARAT Owner Trustee, promptly reimburse the CARAT
Owner Trustee for any such expenses paid by the CARAT Owner Trustee.

      Section 2.6 Declaration of Trust. The CARAT Owner Trustee hereby declares
that it shall hold the CARAT Owner Trust Estate (in the name of the Trust and
not in the CARAT

                                       2

<PAGE>

Owner Trustee's name for the Trust, except as required by, and in accordance
with, Section 2.8) in trust upon and subject to the conditions set forth herein
for the use and benefit of the CARAT 2005-SN1 Certificateholders, subject to the
obligations of the Trust under the CARAT Basic Documents. It is the intention of
the parties hereto that the Trust constitute a statutory trust under the
Statutory Trust Act, that this Agreement constitute the governing instrument of
such statutory trust and that the CARAT 2005-SN1 Certificates represent the
beneficial interests therein. The rights of the CARAT 2005-SN1
Certificateholders shall be determined as set forth herein and in the Statutory
Trust Act and the relationship between the parties hereto created by this
Agreement shall not constitute indebtedness for any purpose. Effective as of the
date hereof, the CARAT Owner Trustee shall have all rights, powers and duties
set forth herein and in the Statutory Trust Act with respect to accomplishing
the purposes of the Trust.

      Section 2.7 Liability of the CARAT 2005-SN1 Certificateholders. CARAT
2005-SN1 Certificateholders and holders of beneficial interests therein shall be
entitled to the same limitation of personal liability extended to stockholders
of private corporations for profit organized under the General Corporation Law
of Delaware.

      Section 2.8 Title to Trust Property. Legal title to all the CARAT Owner
Trust Estate shall be vested at all times in the Trust as a separate legal
entity except where applicable law in any jurisdiction requires title to any
part of the CARAT Owner Trust Estate to be vested in a trustee or trustees, in
which case title shall be deemed to be transferred to and vested in the CARAT
Owner Trustee, a co-trustee and/or a separate trustee, as the case may be. Any
such trustee shall take such part of the CARAT Owner Trust Estate subject to the
security interest of the CARAT Indenture Trustee therein established under the
CARAT Indenture. Such trustee's acceptance of its appointment shall constitute
acknowledgment of such security interest and shall constitute a Grant to the
CARAT Indenture Trustee of a security interest in all property held by such
trustee. Any such trustee shall prepare and file all such financing statements
naming such trustee as debtor that are necessary or advisable to perfect, make
effective or continue the lien and security interest of the CARAT Indenture
Trustee.

      Section 2.9 Situs of Trust. The Trust shall be located and administered in
the States of Delaware or New York. All bank accounts maintained by the CARAT
Owner Trustee on behalf of the Trust shall be located in the State of Delaware
or the State of New York. The Trust shall not have any employees in any state
other than Delaware; provided, however, that nothing herein shall restrict or
prohibit the CARAT Owner Trustee from having employees within or without the
State of Delaware. Payments shall be received by the Trust only in Delaware or
New York, and payments shall be made by the Trust only from Delaware or New
York. The only office of the Trust shall be the Corporate Trust Office in
Delaware.

      Section 2.10 Representations and Warranties of the Seller. The Seller
hereby represents and warrants to the CARAT Owner Trustee that:

            (a) The Seller has been duly organized and is validly existing as a
corporation in good standing under the laws of the State of Delaware, with power
and authority to own its properties and to conduct its business as such
properties are presently owned and such business is presently conducted and had
at all relevant times, and now has, power, authority and legal

                                       3

<PAGE>

right to acquire and own the COLT 2005-SN1 Secured Notes contemplated to be
transferred to the Trust pursuant to the Trust Sale and Administration
Agreement.

            (b) The Seller is duly qualified to do business as a foreign
corporation in good standing, and has obtained all necessary licenses and
approvals in all jurisdictions in which the ownership or lease of property or
the conduct of its business requires such qualifications.

            (c) The Seller has the power and authority to execute and deliver
this Agreement and any other CARAT Basic Documents to which the Seller is a
party, and to carry out its terms, the Seller has full power and authority to
sell and assign the property to be sold and assigned to and deposited with the
Issuer as part of the Trust and the Seller has duly authorized such sale and
assignment to the Issuer by all necessary corporate action; and the execution,
delivery and performance of this Agreement have been duly authorized by the
Seller by all necessary corporate action.

            (d) The consummation of the transactions contemplated by this
Agreement and any other CARAT Basic Documents to which the Seller is a party,
and the fulfillment of the terms of this Agreement and any other CARAT Basic
Documents to which the Seller is a party, do not conflict with, result in any
breach of any of the terms and provisions of or constitute (with or without
notice or lapse of time) a default under, the certificate of incorporation or
by-laws of the Seller, or any indenture, agreement or other instrument to which
the Seller is a party or by which it is bound, or result in the creation or
imposition of any Lien upon any of its properties pursuant to the terms of any
such indenture, agreement or other instrument (other than pursuant to the CARAT
Basic Documents), or violate any law or, to the best of the Seller's knowledge,
any order, rule or regulation applicable to the Seller of any court or of any
federal or state regulatory body, administrative agency or other governmental
instrumentality having jurisdiction over the Seller or any of its properties.

      Section 2.11 Tax Treatment. As long as the Seller is the sole owner of the
CARAT 2005-SN1 Certificates, the Seller and the CARAT Owner Trustee, by entering
into this Agreement, (a) express their intention that the Trust shall be
disregarded for federal income tax purposes and shall be treated as a division
of the Seller and (b) agree that Section 5.5 of this Agreement shall not be
applicable. If the Seller is not the sole owner of the CARAT 2005-SN1
Certificates, through sale of the CARAT 2005-SN1 Certificates, issuance by the
Trust of additional CARAT 2005-SN1 Certificates to a Person other than the
Seller or otherwise, the Seller and the CARAT Owner Trustee, by entering into
this Agreement, and the CARAT 2005-SN1 Certificateholders, by acquiring any
CARAT 2005-SN1 Certificates or interest therein, (i) express their intention
that the CARAT 2005-SN1 Certificates shall qualify as equity interests in either
(A) a division of the Seller, or any other single Person, disregarded as a
separate entity for federal income tax purposes if all CARAT 2005-SN1
Certificates are owned solely by the Seller or by such single Person, or (B) a
partnership for federal income tax purposes if the CARAT 2005-SN1 Certificates
are owned by more than one Person and (ii) unless otherwise required by the
appropriate taxing authorities, agree to treat the CARAT 2005-SN1 Certificates
as equity interests in an entity as described in clause (i) of this Section 2.11
for the purposes of federal income taxes, state and local income and franchise
taxes, Michigan single business tax, and any other taxes imposed upon, measured
by, or based upon gross or net income. The parties agree that, unless otherwise
required by appropriate tax authorities, the Trust shall file or cause to be

                                       4

<PAGE>

filed annual or other necessary returns, reports and other forms consistent with
such characterization of the Trust for such tax purposes.

                                  ARTICLE III
                         THE CARAT 2005-SN1 CERTIFICATES

      Section 3.1 Initial Beneficial Ownership. As of the formation of the Trust
by the contribution by the Seller pursuant to Section 2.5 and until the issuance
of the CARAT 2005-SN1 Certificates, the Seller has been the sole beneficial
owner of the Trust.

      Section 3.2 Form of the CARAT 2005-SN1 Certificates.

            (a) The CARAT 2005-SN1 Certificates shall be substantially in the
form of Exhibit A. The CARAT 2005-SN1 Certificates shall represent the entire
beneficial interest in the Trust. The CARAT 2005-SN1 Certificates shall be
executed on behalf of the Trust by manual or facsimile signature of a
Responsible Officer of the CARAT Owner Trustee. CARAT 2005-SN1 Certificates
bearing the manual or facsimile signatures of individuals who were, at the time
when such signatures shall have been affixed, authorized to sign on behalf of
the Trust, shall be duly issued, fully paid and non-assessable beneficial
interests in the Trust, notwithstanding that such individuals or any of them
shall have ceased to be so authorized prior to the authentication and delivery
of such CARAT 2005-SN1 Certificates or did not hold such offices at the date of
authentication and delivery of such CARAT 2005-SN1 Certificates.

            (b) The CARAT 2005-SN1 Certificates shall be typewritten, printed,
lithographed or engraved or produced by any combination of these methods (with
or without steel engraved borders) all as determined by the officers executing
such CARAT 2005-SN1 Certificates, as evidenced by their execution of such CARAT
2005-SN1 Certificates.

            (c) The CARAT 2005-SN1 Certificates shall be issued in
fully-registered form. The terms of the CARAT 2005-SN1 Certificates set forth in
Exhibit A shall form part of this Agreement.

      Section 3.3 Execution, Authentication and Delivery. Concurrently with the
sale of the COLT 2005-SN1 Secured Notes to the Trust pursuant to the Trust Sale
and Administration Agreement, the CARAT Owner Trustee shall cause a single CARAT
2005-SN1 Certificate representing the entire beneficial interest in the Trust to
be executed on behalf of the Trust, authenticated and delivered to or upon the
written order of the Seller, signed by its chairman of the board, its president
or any vice president, without further corporate action by the Seller. Such
CARAT 2005-SN1 Certificate shall be issued to and held by the Seller, as the
initial CARAT 2005-SN1 Certificateholder. No CARAT 2005-SN1 Certificate shall
entitle its holder to any benefit under this Agreement, or shall be valid for
any purpose, unless there shall appear on such CARAT 2005-SN1 Certificate a
certificate of authentication substantially in the form set forth in Exhibit A,
executed by the CARAT Owner Trustee or Deutsche Bank Trust Company Americas, as
the CARAT Owner Trustee's authenticating agent, by manual signature. Such
authentication shall constitute conclusive evidence that such CARAT 2005-SN1
Certificate shall have been duly authenticated and delivered hereunder. All
CARAT 2005-SN1 Certificates shall be dated the date of their authentication.

                                       5

<PAGE>

      Section 3.4 Registration; Registration of Transfer and Exchange of CARAT
2005-SN1 Certificates.

            (a) The Certificate Registrar shall keep or cause to be kept, at the
office or agency maintained pursuant to Section 3.8, a Certificate Register in
which, subject to such reasonable regulations as it may prescribe, the CARAT
Owner Trustee shall provide for the registration of CARAT 2005-SN1 Certificates
and of transfers and exchanges of CARAT 2005-SN1 Certificates as provided
herein; provided, however, that no CARAT 2005-SN1 Certificate may be subdivided
upon transfer or exchange such that the denomination of any resulting CARAT
2005-SN1 Certificate is less than $20,000. Deutsche Bank Trust Company Americas
shall be the initial Certificate Registrar. Upon any resignation of a
Certificate Registrar, the CARAT Owner Trustee shall promptly appoint a
successor or, if it elects not to make such an appointment, assume the duties of
Certificate Registrar.

            (b) The initial CARAT 2005-SN1 Certificateholder may at any time,
without consent of the Noteholders, sell, transfer, convey or assign in any
manner its rights to and interests in the CARAT 2005-SN1 Certificates, provided,
however, that: (i) such action shall not result in a reduction or withdrawal of
the rating of any class of CARAT 2005-SN1 Notes, (ii) the CARAT 2005-SN1
Certificateholder shall provide to the Owner Trustee and the Indenture Trustee
an opinion of independent counsel that such action shall not cause the Trust to
be treated as an association (or publicly traded partnership) taxable as a
corporation for federal income tax purposes, (iii) such transferee or assignee
shall agree to take positions for tax purposes consistent with the tax positions
agreed to be taken by the CARAT 2005-SN1 Certificateholder, and (iv) the
conditions set forth in Section 3.4(h) shall have been satisfied. In addition,
no transfer of a CARAT 2005-SN1 Certificate shall be registered unless the
transferee shall have provided to the Owner Trustee and the Certificate
Registrar an opinion of counsel that in connection with such transfer no
registration of the CARAT 2005-SN1 Certificates is required under the Securities
Act or applicable state law or that such transfer is otherwise being made in
accordance with all applicable federal and state securities laws. In connection
with any transfer of less than all of the interests in the CARAT 2005-SN1
Certificates, the transferor and the transferee shall specify the respective
interests in the CARAT 2005-SN1 Certificates to be held by transferor and
transferee, which interests may be determined by a formula or on any other basis
agreed by transferor and transferee. If agreed by transferor and transferee,
different interests may be used for distributions of proceeds and for purposes
of voting the CARAT 2005-SN1 Certificates, and the transferor shall notify the
Owner Trustee of any such agreement in connection with such transfer.

            (c) If the Seller is no longer the sole CARAT 2005-SN1
Certificateholder, the Trust Administrator shall promptly prepare amendments
(subject to the provisions regarding amendments in the applicable Basic
Documents) to the Basic Documents to the extent necessary to reflect the
issuance of book-entry certificates, the establishment of the Certificate
Distribution Account and the making of distributions to the CARAT 2005-SN1
Certificateholders and such other matters as shall be agreed between the Seller
and the Owner Trustee. The expense of the foregoing amendments shall be paid by
the Trust Administrator.

            (d) Upon surrender for registration of transfer of any CARAT
2005-SN1 Certificate at the office or agency maintained pursuant to Section 3.8,
the CARAT Owner Trustee shall execute on behalf of the Trust, authenticate and
deliver (or shall cause Deutsche

                                       6

<PAGE>

Bank Trust Company Americas as its authenticating agent to authenticate and
deliver), in the name of the designated transferee or transferees, one or more
new CARAT 2005-SN1 Certificates in authorized denominations of a like aggregate
amount dated the date of authentication by the CARAT Owner Trustee or any
authenticating agent.

            (e) At the option of a Holder, CARAT 2005-SN1 Certificates may be
exchanged for other CARAT 2005-SN1 Certificates of authorized denominations of a
like aggregate principal amount upon surrender of the CARAT 2005-SN1
Certificates to be exchanged at the Corporate Trust Office maintained pursuant
to Section 3.8. Whenever any CARAT 2005-SN1 Certificates are so surrendered for
exchange, the CARAT Owner Trustee shall execute on behalf of the Trust,
authenticate and deliver (or shall cause Deutsche Bank Trust Company Americas as
its authenticating agent to authenticate and deliver) one or more CARAT 2005-SN1
Certificates dated the date of authentication by the CARAT Owner Trustee or any
authenticating agent. Such CARAT 2005-SN1 Certificates shall be delivered to the
Holder making the exchange.

            (f) Every CARAT 2005-SN1 Certificate presented or surrendered for
registration of transfer or exchange shall be accompanied by a written
instrument of transfer in form satisfactory to the CARAT Owner Trustee and the
Certificate Registrar duly executed by the Holder or his attorney duly
authorized in writing and such other documents and instruments as may be
required by Section 3.4(b). Each CARAT 2005-SN1 Certificate surrendered for
registration of transfer or exchange shall be canceled and subsequently
destroyed or otherwise disposed of by the CARAT Owner Trustee or Certificate
Registrar in accordance with its customary practice.

            (g) The CARAT Owner Trustee or the Certificate Registrar may require
payment of a sum sufficient to cover any tax or governmental charge that may be
imposed and any other expenses of the CARAT Owner Trustee in connection with any
transfer or exchange of CARAT 2005-SN1 Certificates.

            (h) The CARAT 2005-SN1 Certificates (or an interest therein) may be
acquired by or for the account of a Benefit Plan only if (a)(i) the CARAT
2005-SN1 Certificates are eligible to be purchased under, and satisfy all
conditions for relief under, one of the underwriter exemptions listed in
footnote 1 of Department of Labor Prohibited Transaction Exemption 2002-41 (67
Fed. Reg. 54487 (August 22, 2002)), or any amendments thereto; and (ii) it is an
"accredited investor" as defined in Rule 501(a)(1) of Regulation D under the
Securities Act, and any holder of the CARAT 2005-SN1 Certificates shall be
deemed to have represented and warranted that it is an "accredited investor"; or
(b) it is an insurance company general account that satisfies the requirements
of Section III of Prohibited Transaction Class Exemption 95-60.

      Section 3.5 Mutilated, Destroyed, Lost or Stolen CARAT 2005-SN1
Certificates.

            (a) If (i) any mutilated CARAT 2005-SN1 Certificate is surrendered
to the Certificate Registrar, or the Certificate Registrar receives evidence to
its satisfaction of the destruction, loss or theft of any CARAT 2005-SN1
Certificate, and (ii) there is delivered to the Certificate Registrar, the CARAT
Owner Trustee and the Trust such security or indemnity as

                                       7

<PAGE>

may be required by them to hold each of them harmless, then, in the absence of
notice to the Certificate Registrar or the CARAT Owner Trustee that such CARAT
2005-SN1 Certificate has been acquired by a protected purchaser, the CARAT Owner
Trustee shall execute on behalf of the Trust and the CARAT Owner Trustee shall
authenticate and deliver (or shall cause Deutsche Bank Trust Company Americas as
its authenticating agent to authenticate and deliver), in exchange for or in
lieu of any such mutilated, destroyed, lost or stolen CARAT 2005-SN1
Certificate, a replacement CARAT 2005-SN1 Certificate in authorized
denominations of a like aggregate principal amount; provided, however, that if
any such destroyed, lost or stolen CARAT 2005-SN1 Certificate, but not a
mutilated CARAT 2005-SN1 Certificate, shall have become or within seven days
shall be due and payable, then instead of issuing a replacement CARAT 2005-SN1
Certificate the CARAT Owner Trustee may pay such destroyed, lost or stolen CARAT
2005-SN1 Certificate when so due or payable.

            (b) If, after the delivery of a replacement CARAT 2005-SN1
Certificate or payment in respect of a destroyed, lost or stolen CARAT 2005-SN1
Certificate pursuant to Section 3.5(a), a protected purchaser of the original
CARAT 2005-SN1 Certificate in lieu of which such replacement CARAT 2005-SN1
Certificate was issued presents for payment such original CARAT 2005-SN1
Certificate, the CARAT Owner Trustee shall be entitled to recover such
replacement CARAT 2005-SN1 Certificate (and any distributions or payments made
with respect thereto) or such payment from the Person to whom it was delivered
or any Person taking such replacement CARAT 2005-SN1 Certificate from such
Person to whom such replacement CARAT 2005-SN1 Certificate was delivered or any
assignee of such Person, except a protected purchaser, and shall be entitled to
recover upon the security or indemnity provided therefor to the extent of any
loss, damage, cost or expense incurred by the CARAT Owner Trustee in connection
therewith.

            (c) In connection with the issuance of any replacement CARAT
2005-SN1 Certificate under this Section 3.5, the CARAT Owner Trustee may require
the payment by the Holder of such CARAT 2005-SN1 Certificate of a sum sufficient
to cover any tax or other governmental charge that may be imposed in relation
thereto and any other reasonable expenses (including the fees and expenses of
the CARAT Owner Trustee and the Certificate Registrar) connected therewith.

            (d) Any duplicate CARAT 2005-SN1 Certificate issued pursuant to this
Section 3.5 in replacement of any mutilated, destroyed, lost or stolen CARAT
2005-SN1 Certificate shall constitute an original additional beneficial interest
in the Trust, whether or not the mutilated, destroyed, lost or stolen CARAT
2005-SN1 Certificate shall be found at any time or be enforced by anyone, and
shall be entitled to all the benefits of this Agreement equally and
proportionately with any and all other CARAT 2005-SN1 Certificates duly issued
hereunder.

            (e) The provisions of this Section 3.5 are exclusive and shall
preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen CARAT
2005-SN1 Certificates.

      Section 3.6 Persons Deemed CARAT 2005-SN1 Certificateholders. Prior to due
presentation of a CARAT 2005-SN1 Certificate for registration of transfer, the
CARAT Owner Trustee or the Certificate Registrar may treat the Person in whose
name any CARAT 2005-SN1

                                       8

<PAGE>

Certificate shall be registered in the Certificate Register as the CARAT
2005-SN1 Certificateholder of such CARAT 2005-SN1 Certificate for the purpose of
receiving distributions pursuant to Article V and for all other purposes
whatsoever, and neither the CARAT Owner Trustee nor the Certificate Registrar
shall be affected by any notice to the contrary.

      Section 3.7 Access to List of CARAT 2005-SN1 Certificateholders' Names and
Addresses. The CARAT Owner Trustee shall furnish or cause to be furnished to the
Trust Administrator and the Seller, within 15 days after receipt by the CARAT
Owner Trustee of a request therefor from the Trust Administrator or the Seller,
in writing, a list of the names and addresses of the CARAT 2005-SN1
Certificateholders as of the most recent Record Date. Each Holder, by receiving
and holding a CARAT 2005-SN1 Certificate, shall be deemed to have agreed not to
hold any of the Trust Administrator, the Seller or the CARAT Owner Trustee
accountable by reason of the disclosure of its name and address, regardless of
the source from which such information was derived.

      Section 3.8 Maintenance of Corporate Trust Office. The CARAT Owner Trustee
shall maintain in the Borough of Manhattan, the City of New York, an office or
offices or agency or agencies where CARAT 2005-SN1 Certificates may be
surrendered for registration of transfer or exchange and where notices and
demands to or upon the CARAT Owner Trustee in respect of the CARAT 2005-SN1
Certificates and the CARAT Basic Documents may be served. The CARAT Owner
Trustee initially designates the offices of Deutsche Bank Trust Company
Americas, 60 Wall Street, New York, NY 10005, as its principal office for such
purposes. The CARAT Owner Trustee shall give prompt written notice to the
Seller, to the Trust Administrator, and to the CARAT 2005-SN1 Certificateholders
of any change in the location of the Certificate Register or any such office or
agency.

      Section 3.9 Appointment of Paying Agent. Except as otherwise provided in
Section 5.2, the Paying Agent shall make distributions to CARAT 2005-SN1
Certificateholders from the Certificate Distribution Account pursuant to Section
5.2 and shall report the amounts of such distributions to the CARAT Owner
Trustee and the Trust Administrator; provided, however, that no such reports
shall be required so long as the Seller is the sole CARAT 2005-SN1
Certificateholder. Any Paying Agent shall have the revocable power to withdraw
funds from the Certificate Distribution Account for the purpose of making the
distributions referred to above. The CARAT Owner Trustee may revoke such power
and remove the Paying Agent if the CARAT Owner Trustee determines in its sole
discretion that the Paying Agent shall have failed to perform its obligations
under this Agreement in any material respect. The Paying Agent shall initially
be Deutsche Bank Trust Company Americas, and any co-paying agent chosen by
Deutsche Bank Trust Company Americas, and acceptable to the CARAT Owner Trustee.
Deutsche Bank Trust Company Americas shall be permitted to resign as Paying
Agent upon 30 days' written notice to the CARAT Owner Trustee. If Deutsche Bank
Trust Company Americas shall no longer be the Paying Agent, the CARAT Owner
Trustee shall appoint a successor to act as Paying Agent (which shall be a bank
or trust company). The CARAT Owner Trustee shall cause such successor Paying
Agent or any additional Paying Agent appointed by the CARAT Owner Trustee to
execute and deliver to the CARAT Owner Trustee an instrument in which such
successor Paying Agent or additional Paying Agent shall agree with the CARAT
Owner Trustee that as Paying Agent, such successor Paying Agent or additional
Paying Agent shall hold all

                                       9

<PAGE>

sums, if any, held by it for payment to the CARAT 2005-SN1 Certificateholders in
trust for the benefit of the CARAT 2005-SN1 Certificateholders entitled thereto
until such sums shall be paid to such CARAT 2005-SN1 Certificateholders. The
Paying Agent shall return all unclaimed funds to the CARAT Owner Trustee and
upon removal of a Paying Agent such Paying Agent shall also return all funds in
its possession to the CARAT Owner Trustee. The provisions of Sections 6.3, 6.6,
6.7 and 6.9 shall apply to the CARAT Owner Trustee also in its role as Paying
Agent, for so long as the CARAT Owner Trustee shall act as Paying Agent and, to
the extent applicable, to any other paying agent, certificate registrar or
authenticating agent appointed hereunder. Any reference in this Agreement to the
Paying Agent shall include any co-paying agent unless the context requires
otherwise.

      Section 3.10 Seller as CARAT 2005-SN1 Certificateholder. The Seller in its
individual or any other capacity may become the owner or pledgee of CARAT
2005-SN1 Certificates and may otherwise deal with the CARAT Owner Trustee or its
Affiliates as if it were not the Seller.

                                   ARTICLE IV
                         ACTIONS BY CARAT OWNER TRUSTEE

      Section 4.1 Prior Notice to CARAT 2005-SN1 Certificateholders with Respect
to Certain Matters. The CARAT Owner Trustee shall not take action with respect
to the following matters, unless (i) the CARAT Owner Trustee shall have notified
the CARAT 2005-SN1 Certificateholders in writing of the proposed action at least
30 days and not more than 45 days before the taking of such action, and (ii) the
CARAT 2005-SN1 Certificateholders shall not have notified the CARAT Owner
Trustee in writing prior to the 30th day after such notice is given that such
CARAT 2005-SN1 Certificateholders have withheld consent or provided alternative
direction:

            (a) the initiation of any claim or lawsuit by the Trust (other than
an action to collect on a COLT 2005-SN1 Secured Note or an action by the CARAT
Indenture Trustee pursuant to the CARAT Indenture) and the compromise of any
action, claim or lawsuit brought by or against the Trust (other than an action
to collect on a COLT 2005-SN1 Secured Note or an action by the CARAT Indenture
Trustee pursuant to the CARAT Indenture);

            (b) the election by the Trust to file an amendment to the
Certificate of Trust, a conformed copy of which is attached hereto as Exhibit B;

            (c) the amendment of the CARAT Indenture by a supplemental indenture
in circumstances where the consent of any CARAT 2005-SN1 Noteholder is required;

            (d) the amendment of the CARAT Indenture by a supplemental indenture
in circumstances where the consent of any CARAT 2005-SN1 Noteholder is not
required and such amendment materially adversely affects the interests of the
CARAT 2005-SN1 Certificateholders;

            (e) the amendment, change or modification of the Trust Sale and
Administration Agreement, except to cure any ambiguity or to amend or supplement
any provision in a manner that would not materially adversely affect the
interests of the CARAT 2005-SN1 Certificateholders; or

                                       10

<PAGE>

            (f) the appointment pursuant to the CARAT Indenture of a successor
Note Registrar, Paying Agent or CARAT Indenture Trustee or pursuant to this
Agreement of a successor Certificate Registrar, or the consent to the assignment
by the Note Registrar, Paying Agent or CARAT Indenture Trustee or Certificate
Registrar of its obligations under the CARAT Indenture or this Agreement, as
applicable.

      Section 4.2 Action by CARAT 2005-SN1 Certificateholders with Respect to
Certain Matters. The CARAT Owner Trustee shall not have the power, except upon
the written direction of the CARAT 2005-SN1 Certificateholders, to remove the
Trust Administrator under the Trust Sale and Administration Agreement pursuant
to Section 7.02 thereof, appoint a successor Trust Administrator under the Trust
Sale and Administration Agreement or except as expressly provided in the CARAT
Basic Documents, sell the COLT 2005-SN1 Secured Notes or any interest therein
after the termination of the CARAT Indenture. The CARAT Owner Trustee shall take
the actions referred to in the preceding sentence only upon written instructions
signed by the CARAT 2005-SN1 Certificateholders.

      Section 4.3 Action by CARAT 2005-SN1 Certificateholders with Respect to
Bankruptcy. Notwithstanding any prior termination of this Agreement, the CARAT
Owner Trustee shall not have the power to commence a voluntary proceeding in
bankruptcy relating to the Trust without the unanimous prior approval of all
CARAT 2005-SN1 Certificateholders (including the Seller) and the delivery to the
CARAT Owner Trustee by each such CARAT 2005-SN1 Certificateholder of a
certificate certifying that such CARAT 2005-SN1 Certificateholder reasonably
believes that the Trust is insolvent; provided, however, that under no
circumstances shall the CARAT Owner Trustee commence or join in commencing any
such proceeding prior to the date that is one year and one day after the
termination of the Trust.

      Section 4.4 Restrictions on CARAT 2005-SN1 Certificateholders' Power. The
CARAT 2005-SN1 Certificateholders shall not direct the CARAT Owner Trustee to
take or refrain from taking any action if such action or inaction would be
contrary to any obligation of the Trust or the CARAT Owner Trustee under this
Agreement, including Section 2.3 of this Agreement, or any of the CARAT Basic
Documents, nor shall the CARAT Owner Trustee be obligated to follow any such
direction, if given. The CARAT 2005-SN1 Certificateholders shall not and shall
not direct the CARAT Owner Trustee to take action that would violate the
provisions of Section 6.1 and, if given, the CARAT Owner Trustee shall not be
obligated to follow any such direction.

      Section 4.5 Majority Control. Except as expressly provided herein, any
action that may be taken or consent that may be given or withheld by the CARAT
2005-SN1 Certificateholders under this Agreement shall be effective if such
action is taken or such consent is given or withheld by the Holders of CARAT
2005-SN1 Certificates evidencing not less than a majority of the Voting
Interests as of the close of the preceding Distribution Date. Except as
expressly provided herein, any written notice, instruction, direction or other
document of the CARAT 2005-SN1 Certificateholders delivered pursuant to this
Agreement shall be effective if signed by Holders of CARAT 2005-SN1 Certificates
evidencing not less than a majority of the Voting Interests at the time of the
delivery of such notice.

                                       11

<PAGE>

                                   ARTICLE V
                   APPLICATION OF TRUST FUNDS; CERTAIN DUTIES

      Section 5.1 Establishment of Certificate Distribution Account.

            (a) Except as otherwise provided in Section 5.2, the Trust
Administrator, for the benefit of the CARAT 2005-SN1 Certificateholders, shall
establish and maintain in the name of the Trust an Eligible Deposit Account
known as the Capital Auto Receivables Asset Trust 2005-SN1 Certificate
Distribution Account (the "Certificate Distribution Account"), bearing an
additional designation clearly indicating that the funds deposited therein are
held for the benefit of the CARAT 2005-SN1 Certificateholders.

            (b) The Trust shall possess all right, title and interest in and to
all funds on deposit from time to time in the Certificate Distribution Account
and in all proceeds thereof. Except as otherwise provided herein, in the CARAT
Indenture or in the Trust Sale and Administration Agreement, the Certificate
Distribution Account shall be under the sole dominion and control of the CARAT
Owner Trustee for the benefit of the CARAT 2005-SN1 Certificateholders. If, at
any time, the Certificate Distribution Account ceases to be an Eligible Deposit
Account, the CARAT Owner Trustee (or the Trust Administrator on behalf of the
CARAT Owner Trustee, if the Certificate Distribution Account is not then held by
the CARAT Owner Trustee or an Affiliate thereof) shall within 10 Business Days
(or such longer period, not to exceed 30 calendar days, as to which each Rating
Agency may consent) establish a new Certificate Distribution Account as an
Eligible Deposit Account and shall transfer any cash and/or any investments to
such new Certificate Distribution Account.

      Section 5.2 Application of Trust Funds.

            (a) On each Distribution Date, the CARAT Owner Trustee shall
distribute to the CARAT 2005-SN1 Certificateholders, on a pro rata basis,
amounts equal to the amounts deposited in the Certificate Distribution Account
pursuant to Sections 4.05 and 8.01(b) of the Trust Sale and Administration
Agreement on or prior to such Distribution Date. Notwithstanding the foregoing
or anything else to the contrary in this Agreement or the other CARAT Basic
Documents, if and for so long as CARAT 2005-SN1 Certificates representing in the
aggregate a 100% beneficial interest in the Trust are held by the Seller, (i) no
Certificate Distribution Account shall be required to be established or
maintained and (ii) all distributions and payments on the CARAT 2005-SN1
Certificates (including the final distribution as contemplated by Section
7.1(c)) required hereunder or under the Trust Sale and Administration Agreement
shall be made directly to the Seller by the CARAT Indenture Trustee (whether or
not the Trust Sale and Administration Agreement otherwise contemplates deposit
into the Certificate Distribution Account) and the CARAT Owner Trustee shall
have no duty or liability to see to such distribution.

            (b) On each Distribution Date, the CARAT Owner Trustee shall send to
each CARAT 2005-SN1 Certificateholder the statement provided to the CARAT Owner
Trustee by the Trust Administrator pursuant to Section 4.07(a) of the Trust Sale
and Administration Agreement on such Distribution Date setting forth, among
other things, the amount distributed on the CARAT 2005-SN1 Certificates and the
Administration Fee with respect to such

                                       12

<PAGE>

Distribution Date or Monthly Period, as applicable; provided, however, that no
such statement shall be required to be sent by the CARAT Owner Trustee if and
for so long as the Seller is the sole CARAT 2005-SN1 Certificateholder.

            (c) If any withholding tax is imposed on the Trust's payment (or
allocations of income) to a CARAT 2005-SN1 Certificateholder, such tax shall
reduce the amount otherwise distributable to the CARAT 2005-SN1
Certificateholder in accordance with this Section 5.2; provided, however, that
the CARAT Owner Trustee shall not have an obligation to withhold any such amount
if and for so long as the Seller is the sole CARAT 2005-SN1 Certificateholder.
The CARAT Owner Trustee is hereby authorized and directed to retain from amounts
otherwise distributable to the CARAT 2005-SN1 Certificateholders sufficient
funds for the payment of any tax that is legally owed by the Trust (but such
authorization shall not prevent the CARAT Owner Trustee from contesting any such
tax in appropriate proceedings and withholding payment of such tax, if permitted
by law, pending the outcome of such proceedings). The amount of any withholding
tax imposed with respect to a CARAT 2005-SN1 Certificateholder shall be treated
as cash distributed to such CARAT 2005-SN1 Certificateholder at the time it is
withheld by the Trust and remitted to the appropriate taxing authority. If there
is a possibility that withholding tax is payable with respect to a distribution
(such as a distribution to a non-U.S. CARAT 2005-SN1 Certificateholder), the
CARAT Owner Trustee may in its sole discretion withhold such amounts in
accordance with this Section 5.2(c). If a CARAT 2005-SN1 Certificateholder
wishes to apply for a refund of any such withholding tax, the CARAT Owner
Trustee shall reasonably cooperate with such CARAT 2005-SN1 Certificateholder in
making such claim so long as such CARAT 2005-SN1 Certificateholder agrees to
reimburse the CARAT Owner Trustee for any out-of-pocket expenses incurred.

            (d) If the CARAT Indenture Trustee holds escheated funds for payment
to the Trust pursuant to Section 3.3(e) of the CARAT Indenture, the CARAT Owner
Trustee shall, upon notice from the CARAT Indenture Trustee that such funds
exist, submit on behalf of the Trust an Issuer Order to the CARAT Indenture
Trustee pursuant to Section 3.3(e) of the CARAT Indenture instructing the CARAT
Indenture Trustee to pay such funds to or at the order of the Seller.

      Section 5.3 Method of Payment. Subject to Section 7.1(c), distributions
required to be made to CARAT 2005-SN1 Certificateholders on any Distribution
Date shall be made to each CARAT 2005-SN1 Certificateholder of record on the
related Record Date (i) by wire transfer, in immediately available funds, to the
account of such Holder at a bank or other entity having appropriate facilities
therefor, if such CARAT 2005-SN1 Certificateholder shall have provided to the
Certificate Registrar appropriate written instructions at least five Business
Days prior to such Record Date or if not, by check mailed to such CARAT 2005-SN1
Certificateholder at the address of such CARAT 2005-SN1 Certificateholder
appearing in the Certificate Register.

      Section 5.4 Accounting and Reports to the CARAT 2005-SN1
Certificateholders, the Internal Revenue Service and Others. The CARAT Owner
Trustee shall maintain (or cause to be maintained) the books of the Trust on a
calendar year basis on the accrual method of accounting, deliver to each CARAT
2005-SN1 Certificateholder, as may be required by the Code and applicable
Treasury Regulations or otherwise, such information as may be required to enable
each CARAT 2005-SN1 Certificateholder to prepare its federal income tax return,
file such tax

                                       13

<PAGE>

returns relating to the Trust and make such elections as may from time to time
be required or appropriate under any applicable state or federal statute or rule
or regulation thereunder so as to maintain the Trust's characterization as an
entity described in clause (a) of Section 2.11 for federal income tax purposes,
cause such tax returns to be signed in the manner required by law and collect or
cause to be collected any withholding tax as described in and in accordance with
Section 5.2(c) with respect to income or distributions to CARAT 2005-SN1
Certificateholders. If the Internal Revenue Service were to contend successfully
that the Trust is not a disregarded entity but is rather a partnership for
federal income tax purposes, the Trust shall allocate items of income, gain,
deduction and loss to the partners of the Trust in accordance with their
economic interests in the Trust. With respect to interest expense of the Trust,
the Trust shall allocate to the CARAT 2005-SN1 Certificateholders their share of
the entire amount of such interest expense.

      Section 5.5 Signature on Returns; Other Tax Matters. The CARAT Owner
Trustee shall sign on behalf of the Trust any and all tax returns of the Trust,
unless applicable law requires a CARAT 2005-SN1 Certificateholder to sign such
documents, in which case such documents shall be signed by the Seller. To the
extent one may be required, the Seller shall be the "tax matters partner" of the
Trust pursuant to the Code.

                                   ARTICLE VI
                             THE CARAT OWNER TRUSTEE

      Section 6.1 Duties of CARAT Owner Trustee.

            (a) The CARAT Owner Trustee undertakes to perform such duties, and
only such duties, as are specifically set forth in this Agreement and the other
CARAT Basic Documents, including the administration of the Trust in the interest
of the CARAT 2005-SN1 Certificateholders, subject to the CARAT Basic Documents
and in accordance with the provisions of this Agreement. No implied covenants or
obligations shall be read into this Agreement.

            (b) Notwithstanding the foregoing, the CARAT Owner Trustee shall be
deemed to have discharged its duties and responsibilities hereunder and under
the CARAT Basic Documents to the extent the Trust Administrator has agreed in
the Trust Sale and Administration Agreement to perform any act or to discharge
any duty of the CARAT Owner Trustee hereunder or under any CARAT Basic Document,
and the CARAT Owner Trustee shall not be liable for the default or failure of
the Trust Administrator to carry out its obligations under the Trust Sale and
Administration Agreement.

            (c) In the absence of bad faith on its part, the CARAT Owner Trustee
may conclusively rely upon certificates or opinions furnished to the CARAT Owner
Trustee and conforming to the requirements of this Agreement in determining the
truth of the statements and the correctness of the opinions contained therein;
provided, however, that the CARAT Owner Trustee shall have examined such
certificates or opinions so as to determine compliance of the same with the
requirements of this Agreement.

            (d) The CARAT Owner Trustee may not be relieved from liability for
its own negligent action, its own negligent failure to act or its own willful
misconduct, except that:

                                       14

<PAGE>

                  (i) this Section 6.1(d) shall not limit the effect of Section
6.1(a) or (b);

                  (ii) the CARAT Owner Trustee shall not be liable for any error
of judgment made in good faith by a Responsible Officer unless it is proved that
the CARAT Owner Trustee was negligent in ascertaining the pertinent facts;

                  (iii) the CARAT Owner Trustee shall not be liable with respect
to any action it takes or omits to take in good faith in accordance with a
direction received by it pursuant to Section 4.1, 4.2 or 6.4; and

                  (iv) the CARAT Owner Trustee shall not be personally liable
for special, consequential or punitive damages, however styled, including lost
profits.

            (e) Subject to Sections 5.1 and 5.2, monies received by the CARAT
Owner Trustee hereunder need not be segregated in any manner except to the
extent required by law or the Trust Sale and Administration Agreement and may be
deposited under such general conditions as may be prescribed by law, and the
CARAT Owner Trustee shall not be liable for any interest thereon.

            (f) The CARAT Owner Trustee shall not take any action that (i) is
inconsistent with the purposes of the Trust set forth in Section 2.3 or (ii)
would, to the actual knowledge of a Responsible Officer of the CARAT Owner
Trustee, result in the Trust's becoming taxable as a corporation for federal
income tax purposes. The CARAT 2005-SN1 Certificateholders shall not direct the
CARAT Owner Trustee to take action that would violate the provisions of this
Section 6.1.

      Section 6.2 Rights of CARAT Owner Trustee. The CARAT Owner Trustee is
authorized and directed to execute and deliver the CARAT Basic Documents and
each certificate or other document attached as an exhibit to or contemplated by
the CARAT Basic Documents to which the Trust is to be a party, in such form as
the Seller shall approve as evidenced conclusively by the CARAT Owner Trustee's
execution thereof. In addition to the foregoing, the CARAT Owner Trustee is
authorized, but shall not be obligated, to take all actions required of the
Trust pursuant to the CARAT Basic Documents. The CARAT Owner Trustee is further
authorized from time to time to take such action as the Trust Administrator
recommends and directs in writing with respect to the CARAT Basic Documents.

      Section 6.3 Acceptance of Trusts and Duties. Except as otherwise provided
in this Article VI, in accepting the trusts hereby created, Deutsche Bank Trust
Company Delaware acts solely as CARAT Owner Trustee hereunder and not in its
individual capacity and all Persons having any claim against the CARAT Owner
Trustee by reason of the transactions contemplated by this Agreement or any
CARAT Basic Document shall look only to the CARAT Owner Trust Estate for payment
or satisfaction thereof. The CARAT Owner Trustee accepts the trusts hereby
created and agrees to perform its duties hereunder with respect to such trusts
but only upon the terms of this Agreement. The CARAT Owner Trustee also agrees
to disburse all monies actually received by it constituting part of the CARAT
Owner Trust Estate upon the terms of the CARAT Basic Documents and this
Agreement. The CARAT Owner Trustee shall not be liable or accountable hereunder
or under any CARAT Basic Document under any circumstances, except

                                       15

<PAGE>

for its own negligent action, its own negligent failure to act or its own
willful misconduct or in the case of the inaccuracy of any representation or
warranty contained in Section 6.6 and expressly made by the CARAT Owner Trustee.
In particular, but not by way of limitation (and subject to the exceptions set
forth in the preceding sentence):

            (a) the CARAT Owner Trustee shall at no time have any responsibility
or liability for, or with respect to, the legality, validity and enforceability
of any COLT 2005-SN1 Secured Note, or the perfection and priority of any
security interest created by any COLT 2005-SN1 Secured Note in any Series
2005-SN1 Lease Asset or the maintenance of any such perfection and priority, or
for, or with respect to, the sufficiency of the CARAT Owner Trust Estate or its
ability to generate the payments to be distributed to CARAT 2005-SN1
Certificateholders under this Agreement or to CARAT 2005-SN1 Noteholders under
the CARAT Indenture, including, without limitation: the existence, condition and
ownership of any Series 2005-SN1 Lease Asset securing a COLT 2005-SN1 Secured
Note; the existence and enforceability of any insurance thereon; the existence
and contents of any COLT 2005-SN1 Secured Note on any computer or other record
thereof; the validity of the assignment of any COLT 2005-SN1 Secured Note to the
Trust or of any intervening assignment; the completeness of any COLT 2005-SN1
Secured Note; the performance or enforcement of any COLT 2005-SN1 Secured Note;
the compliance by the Seller or the Trust Administrator with any warranty or
representation made under any CARAT Basic Document or in any related document or
the accuracy of any such warranty or representation or any action of the Trustee
or the Trust Administrator or any sub-administrator taken in the name of the
CARAT Owner Trustee;

            (b) the CARAT Owner Trustee shall not be liable with respect to any
action taken or omitted to be taken by it in accordance with the instructions of
the Trust Administrator or any CARAT 2005-SN1 Certificateholder;

            (c) no provision of this Agreement or any CARAT Basic Document shall
require the CARAT Owner Trustee to expend or risk funds or otherwise incur any
financial liability in the performance of any of its rights or powers hereunder
or under any CARAT Basic Document, if the CARAT Owner Trustee shall have
reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured or provided
to it;

            (d) under no circumstances shall the CARAT Owner Trustee be liable
for indebtedness evidenced by or arising under any of the CARAT Basic Documents,
including the principal of and interest on the CARAT 2005-SN1 Notes;

            (e) the CARAT Owner Trustee shall not be responsible for or in
respect of and makes no representation as to the validity or sufficiency of any
provision of this Agreement other than as explicitly set forth herein or for the
due execution hereof by the Seller or for the form, character, genuineness,
sufficiency, value or validity of any of the CARAT Owner Trust Estate or for, or
in respect of, the validity or sufficiency of the CARAT Basic Documents, the
CARAT 2005-SN1 Notes, the CARAT 2005-SN1 Certificates (other than the
certificate of authentication on the CARAT 2005-SN1 Certificates) or of any COLT
2005-SN1 Secured Notes or any related documents, and the CARAT Owner Trustee
shall in no event assume or incur any liability, duty or obligation to any CARAT
2005-SN1 Noteholder or to any CARAT 2005-SN1

                                       16

<PAGE>

Certificateholder, other than as expressly provided for herein and in the CARAT
Basic Documents;

            (f) the CARAT Owner Trustee shall not be liable for the default or
misconduct of the CARAT Indenture Trustee, the Seller or the Trust Administrator
under any of the CARAT Basic Documents or otherwise and the CARAT Owner Trustee
shall have no obligation or liability to perform the obligations of the Trust
under this Agreement or the CARAT Basic Documents that are required to be
performed by the CARAT Indenture Trustee under the CARAT Indenture or the Trust
Administrator under the Pooling and Administration Agreement or the Trust Sale
and Administration Agreement;

            (g) the CARAT Owner Trustee shall be under no obligation to exercise
any of the rights or powers vested in it by this Agreement, or to institute,
conduct or defend any litigation under this Agreement or otherwise or in
relation to this Agreement or any CARAT Basic Document, at the request, order or
direction of any of the CARAT 2005-SN1 Certificateholders, unless such CARAT
2005-SN1 Certificateholders have offered to the CARAT Owner Trustee security or
indemnity satisfactory to it against the costs, expenses and liabilities that
may be incurred by the CARAT Owner Trustee therein or thereby; the right of the
CARAT Owner Trustee to perform any discretionary act enumerated in this
Agreement or in any CARAT Basic Document shall not be construed as a duty, and
the CARAT Owner Trustee shall not be answerable for other than its negligence or
willful misconduct in the performance of any such act; and

            (h) notwithstanding anything to the contrary contained herein or in
any other CARAT Basic Document, the CARAT Owner Trustee shall not be required to
execute, deliver or certify on behalf of the Trust or any other Person any
filings, certificates, affidavits or other instruments required under the
Sarbanes-Oxley Act of 2002; notwithstanding any Person's right to instruct the
CARAT Owner Trustee, neither the CARAT Owner Trustee nor any agent, employee,
director or officer of the CARAT Owner Trustee shall have any obligation to
execute any certificates or other documents required pursuant to the
Sarbanes-Oxley Act of 2002 or the rules and regulations promulgated pursuant
thereto, and the refusal to comply with any such instructions shall not
constitute a default or breach under any CARAT Basic Document; if the CARAT
Owner Trustee, on behalf of the Trust, does not execute, deliver or certify any
filings, certificates, affidavits or other instruments required under the
Sarbanes-Oxley Act of 2002, an Officer of the Trust Administrator shall, on
behalf of the Trust, execute, deliver or make such certification.

      Section 6.4 Action Upon Instruction by CARAT 2005-SN1 Certificateholders.

            (a) Subject to Section 4.4, the CARAT 2005-SN1 Certificateholders
may by written instruction direct the CARAT Owner Trustee in the management of
the Trust. Such direction may be exercised at any time by written instruction of
the CARAT 2005-SN1 Certificateholders pursuant to Section 4.5.

            (b) Notwithstanding the foregoing, the CARAT Owner Trustee shall not
be required to take any action hereunder or under any CARAT Basic Document if
the CARAT Owner Trustee shall have reasonably determined, or shall have been
advised by counsel, that

                                       17

<PAGE>

such action is likely to result in liability on the part of the CARAT Owner
Trustee or is contrary to the terms hereof or of any CARAT Basic Document or is
otherwise contrary to law.

            (c) Whenever the CARAT Owner Trustee is unable to decide between
alternative courses of action permitted or required by the terms of this
Agreement or any CARAT Basic Document, or is unsure as to the application,
intent, interpretation or meaning of any provision of this Agreement or the
CARAT Basic Documents, the CARAT Owner Trustee shall promptly give notice (in
such form as shall be appropriate under the circumstances) to the CARAT 2005-SN1
Certificateholders requesting instruction as to the course of action to be
adopted, and, to the extent the CARAT Owner Trustee acts in good faith in
accordance with any such instruction received, the CARAT Owner Trustee shall not
be liable on account of such action to any Person. If the CARAT Owner Trustee
shall not have received appropriate instructions within ten days of such notice
(or within such shorter period of time as reasonably may be specified in such
notice or may be necessary under the circumstances) it may, but shall be under
no duty to, take or refrain from taking such action which is consistent, in its
view, with this Agreement or the CARAT Basic Documents, and as it shall deem to
be in the best interests of the CARAT 2005-SN1 Certificateholders, and the CARAT
Owner Trustee shall have no liability to any Person for any such action or
inaction.

      Section 6.5 Furnishing of Documents. The CARAT Owner Trustee shall furnish
to the CARAT 2005-SN1 Certificateholders, promptly upon receipt of a written
request therefor, duplicates or copies of all reports, notices, requests,
demands, certificates, financial statements and any other instruments furnished
to the CARAT Owner Trustee under the CARAT Basic Documents.

      Section 6.6 Representations and Warranties of CARAT Owner Trustee. The
CARAT Owner Trustee hereby represents and warrants to the Seller, for the
benefit of the CARAT 2005-SN1 Certificateholders, that:

            (a) It is a banking corporation duly organized, validly existing and
in good standing under the laws of the state of its incorporation. It has
satisfied the eligibility requirements set forth in Section 6.13.

            (b) It has full power, authority and legal right to execute, deliver
and perform this Agreement, and has taken all necessary action to authorize the
execution, delivery and performance by it of this Agreement.

            (c) The execution, delivery and performance by it of this Agreement
(i) shall not violate any provision of any law or regulation governing the
banking and trust powers of the CARAT Owner Trustee or any order, writ, judgment
or decree of any court, arbitrator or governmental authority applicable to the
CARAT Owner Trustee or any of its assets, (ii) shall not violate any provision
of the corporate charter or by-laws of the CARAT Owner Trustee or (iii) shall
not violate any provision of, or constitute, with or without notice or lapse of
time, a default under, or result in the creation or imposition of any lien on
any properties included in the Trust pursuant to the provisions of any mortgage,
indenture, contract, agreement or other undertaking to which it is a party,
which violation, default or lien could reasonably be expected to have a
materially adverse effect on the CARAT Owner Trustee's performance or ability to

                                       18

<PAGE>

perform its duties as CARAT Owner Trustee under this Agreement or on the
transactions contemplated in this Agreement.

            (d) This Agreement has been duly executed and delivered by the CARAT
Owner Trustee and constitutes the legal, valid and binding agreement of the
CARAT Owner Trustee, enforceable in accordance with its terms, except as
enforceability may be limited by bankruptcy, insolvency, reorganization, or
other similar laws affecting the enforcement of creditors' rights in general and
by general principles of equity, regardless of whether such enforceability is
considered in a proceeding in equity or at law.

      Section 6.7 Reliance; Advice of Counsel.

            (a) The CARAT Owner Trustee shall incur no liability to anyone in
acting upon any signature, instrument, notice, resolution, request, consent,
order, certificate, report, opinion, bond or other document or paper believed by
it to be genuine and believed by it to be signed by the proper party or parties
and need not investigate any fact or matter in any such document. The CARAT
Owner Trustee may accept a certified copy of a resolution of the board of
directors or other governing body of any corporate party as conclusive evidence
that such resolution has been duly adopted by such body and that the same is in
full force and effect. As to any fact or matter the method of the determination
of which is not specifically prescribed herein, the CARAT Owner Trustee may for
all purposes hereof rely on a certificate, signed by the president or any vice
president or by the treasurer or other authorized officers of the relevant
party, as to such fact or matter, and such certificate shall constitute full
protection to the CARAT Owner Trustee for any action taken or omitted to be
taken by it in good faith in reliance thereon.

            (b) In the exercise or administration of the trusts hereunder and in
the performance of its duties and obligations under this Agreement or the CARAT
Basic Documents, the CARAT Owner Trustee may act directly or through its agents,
attorneys, custodians or nominees (including the granting of a power of attorney
to officers of Deutsche Bank Trust Company Americas to execute and deliver any
CARAT Basic Documents, CARAT 2005-SN1 Certificate, CARAT 2005-SN1 Note or other
documents related thereto on behalf of the CARAT Owner Trustee) pursuant to
agreements entered into with any of them, and the CARAT Owner Trustee shall not
be liable for the conduct or misconduct of such agents, attorneys, custodians or
nominees if such agents, attorneys, custodians or nominees shall have been
selected by the CARAT Owner Trustee with reasonable care; and may consult with
counsel, accountants and other skilled professionals to be selected with
reasonable care and employed by it. The CARAT Owner Trustee shall not be liable
for anything done, suffered or omitted in good faith by it in accordance with
the opinion or advice of any such counsel, accountants or other such Persons and
not contrary to this Agreement or any CARAT Basic Document.

      Section 6.8 CARAT Owner Trustee May Own CARAT 2005-SN1 Certificates and
CARAT 2005-SN1 Notes. Deutsche Bank Trust Company Delaware or any successor
CARAT Owner Trustee in its individual or any other capacity may become the owner
or pledgee of CARAT 2005-SN1 Certificates or CARAT 2005-SN1 Notes and may deal
with the Seller, the CARAT Indenture Trustee and the Trust Administrator in
transactions in the same manner as it would have if it were not the CARAT Owner
Trustee.

                                       19

<PAGE>

      Section 6.9 Compensation and Indemnity. The CARAT Owner Trustee shall
receive as compensation for its services hereunder such fees as have been
separately agreed upon before the date hereof between the Trust Administrator
and the CARAT Owner Trustee, and the CARAT Owner Trustee, any paying agent,
registrar, authenticating agent or co-trustee shall be entitled to be reimbursed
by the Trust Administrator for its other reasonable expenses hereunder,
including the reasonable compensation, expenses and disbursements of such
agents, custodians, nominees, representatives, experts and external counsel as
the CARAT Owner Trustee may employ in connection with the exercise and
performance of its rights and its duties hereunder. The Trust Administrator
shall indemnify the CARAT Owner Trustee, any paying agent, registrar,
authenticating agent or co-trustee and its successors, assigns, agents and
servants in accordance with the provisions of Section 6.01 of the Trust Sale and
Administration Agreement. The indemnities contained in this Section 6.9 shall
survive the resignation or removal of the CARAT Owner Trustee or the termination
of this Agreement. Any amounts paid to the CARAT Owner Trustee pursuant to this
Article VI shall be deemed not to be a part of the CARAT Owner Trust Estate
immediately after such payment.

      Section 6.10 Replacement of CARAT Owner Trustee.

            (a) The CARAT Owner Trustee may give notice of its intent to resign
and be discharged from the trusts hereby created by giving notice thereof to the
Trust Administrator provided, however, that no such resignation shall become
effective, and the CARAT Owner Trustee shall not resign, prior to the time set
forth in Section 6.10(c). If no successor CARAT Owner Trustee shall have been
appointed pursuant to Section 6.10(b) and have accepted such appointment within
30 days after the giving of such notice, the CARAT Owner Trustee giving such
notice may petition any court of competent jurisdiction for the appointment of a
successor CARAT Owner Trustee. The Trust Administrator shall remove the CARAT
Owner Trustee if:

                  (i) the CARAT Owner Trustee shall cease to be eligible in
accordance with the provisions of Section 6.13 and shall fail to resign after
written request therefor by the Trust Administrator;

                  (ii) the CARAT Owner Trustee shall be adjudged bankrupt or
insolvent;

                  (iii) a receiver or other public officer shall be appointed or
take charge or control of the CARAT Owner Trustee or of its property or affairs
for the purpose of rehabilitation, conservation or liquidation; or

                  (iv) the CARAT Owner Trustee shall otherwise be incapable of
acting.

            (b) If the CARAT Owner Trustee gives notice of its intent to resign
or is removed or if a vacancy exists in the office of CARAT Owner Trustee for
any reason the Trust Administrator shall promptly appoint a successor CARAT
Owner Trustee by written instrument, in duplicate (one copy of which instrument
shall be delivered to the outgoing CARAT Owner Trustee so removed and one copy
to the successor CARAT Owner Trustee) and shall pay all fees owed to the
outgoing CARAT Owner Trustee.

                                       20

<PAGE>

            (c) Any resignation or removal of the CARAT Owner Trustee and
appointment of a successor CARAT Owner Trustee pursuant to any of the provisions
of this Section 6.10 shall not become effective and no such resignation shall be
deemed to have occurred until a written acceptance of appointment is delivered
by the successor CARAT Owner Trustee to the outgoing CARAT Owner Trustee and the
Trust Administrator and all fees and expenses due to the outgoing CARAT Owner
Trustee are paid. Any successor CARAT Owner Trustee appointed pursuant to this
Section 6.10 shall be eligible to act in such capacity in accordance with
Section 6.13 and, following compliance with the preceding sentence, shall become
fully vested with all the rights, powers, duties and obligations of its
predecessor under this Agreement, with like effect as if originally named as
CARAT Owner Trustee. The Trust Administrator shall provide notice of such
resignation or removal of the CARAT Owner Trustee to the Rating Agencies.

            (d) The predecessor CARAT Owner Trustee shall upon payment of its
fees and expenses deliver to the successor CARAT Owner Trustee all documents and
statements and monies held by it under this Agreement. The Trust Administrator
and the predecessor CARAT Owner Trustee shall execute and deliver such
instruments and do such other things as may reasonably be required for fully and
certainly vesting and confirming in the successor CARAT Owner Trustee all such
rights, powers, duties and obligations.

            (e) Upon acceptance of appointment by a successor CARAT Owner
Trustee pursuant to this Section 6.10, the Trust Administrator shall mail notice
of the successor of such CARAT Owner Trustee to all CARAT 2005-SN1
Certificateholders, the CARAT Indenture Trustee, the CARAT 2005-SN1 Noteholders
and the Rating Agencies.

      Section 6.11 Merger or Consolidation of CARAT Owner Trustee. Any Person
into which the CARAT Owner Trustee may be merged or converted or with which it
may be consolidated, or any Person resulting from any merger, conversion or
consolidation to which the CARAT Owner Trustee shall be a party, or any Person
succeeding to all or substantially all of the corporate trust business of the
CARAT Owner Trustee, shall be the successor of the CARAT Owner Trustee
hereunder, provided such Person shall be eligible pursuant to Section 6.13, and
without the execution or filing of any instrument or any further act on the part
of any of the parties hereto; provided, however, that the CARAT Owner Trustee
shall mail notice of such merger or consolidation to the Rating Agencies.

      Section 6.12 Appointment of Co-Trustee or Separate Trustee.

            (a) Notwithstanding any other provisions of this Agreement, at any
time, for the purpose of meeting any legal requirement of any jurisdiction in
which any part of the CARAT Owner Trust Estate or any COLT 2005-SN1 Secured Note
may at the time be located, the Trust Administrator and the CARAT Owner Trustee
acting jointly shall, at the expense of the Trust Administrator, have the power
and shall, at the expense of the Trust Administrator, execute and deliver all
instruments to appoint one or more Persons approved by the CARAT Owner Trustee
to act as co-trustee, jointly with the CARAT Owner Trustee, or as separate
trustee or trustees, of all or any part of the CARAT Owner Trust Estate, and to
vest in such Person (in the name of the Trust and not in such Person's name for
the Trust, except to the extent otherwise required by, and in accordance with,
Section 2.8), in such capacity, such title to the Trust, or any

                                       21
<PAGE>

part thereof, and, subject to the other provisions of this Section 6.12, such
powers, duties, obligations, rights and trusts as the Trust Administrator and
the CARAT Owner Trustee may consider necessary or desirable. If the Trust
Administrator shall not have joined in such appointment within 15 days after the
receipt by it of a request so to do, the CARAT Owner Trustee alone shall have
the power to make such appointment. No co-trustee or separate trustee under this
Agreement shall be required to meet the terms of eligibility as a successor
trustee pursuant to Section 6.13 and no notice of the appointment of any
co-trustee or separate trustee shall be required pursuant to Section 6.10.

            (b) Each separate trustee and co-trustee shall, to the extent
permitted by law, be appointed and act subject to the following provisions and
conditions:

                  (i) all rights, powers, duties and obligations conferred or
imposed upon the CARAT Owner Trustee shall be conferred upon and exercised or
performed by the CARAT Owner Trustee and such separate trustee or co-trustee
jointly (it being understood that such separate trustee or co-trustee is not
authorized to act separately without the CARAT Owner Trustee joining in such
act), except to the extent that under any law of any jurisdiction in which any
particular act or acts are to be performed, the CARAT Owner Trustee shall be
incompetent or unqualified to perform such act or acts, in which event such
rights, powers, duties and obligations (including the holding of title to the
Trust or any portion thereof in any such jurisdiction) shall be exercised and
performed singly by such separate trustee or co-trustee, but solely at the
direction of the CARAT Owner Trustee;

                  (ii) no trustee under this Agreement shall be personally
liable by reason of any act or omission of any other trustee under this
Agreement; and

                  (iii) the Trust Administrator and the CARAT Owner Trustee
acting jointly may at any time accept the resignation of or remove any separate
trustee or co-trustee.

            (c) Any notice, request or other writing given to the CARAT Owner
Trustee shall be deemed to have been given to each of the then separate trustees
and co-trustees, as effectively as if given to each of them. Every instrument
appointing any separate trustee or co-trustee shall refer to this Agreement and
the conditions of this Article. Each separate trustee and co-trustee, upon its
acceptance of the trusts conferred, shall be vested with the estates or property
specified in its instrument of appointment, either jointly with the CARAT Owner
Trustee or separately, as may be provided therein, subject to all the provisions
of this Agreement, specifically including every provision of this Agreement
relating to the conduct of, affecting the liability of, or affording protection
to, the CARAT Owner Trustee. Each such instrument shall be filed with the CARAT
Owner Trustee and a copy thereof given to the Trust Administrator.

            (d) Any separate trustee or co-trustee may at any time appoint the
CARAT Owner Trustee as its agent or attorney-in-fact with full power and
authority, to the extent not prohibited by law, to do any lawful act under or in
respect of this Agreement on its behalf and in its name. If any separate trustee
or co-trustee shall die, become incapable of acting, resign or be removed, all
of its estates, properties, rights, remedies and trusts shall vest in and be
exercised by the CARAT Owner Trustee, to the extent permitted by law, without
the appointment of a new or successor trustee.

                                       22

<PAGE>

      Section 6.13 Eligibility Requirements for CARAT Owner Trustee. The CARAT
Owner Trustee shall at all times satisfy the requirement of Section 26(a)(1) of
the Investment Company Act. The CARAT Owner Trustee shall at all times: (a) be a
corporation satisfying the provisions of Section 3807(a) of the Statutory Trust
Act; (b) be authorized to exercise corporate trust powers; (c) have a combined
capital and surplus of at least $50,000,000 and be subject to supervision or
examination by federal or state authorities; and (d) have (or have a parent
which has) a long-term unsecured debt rating of at least BBB- by Standard &
Poor's Ratings Services and at least Baa3 by Moody's Investors Service, Inc. If
such corporation shall publish reports of condition at least annually, pursuant
to law or to the requirements of the aforesaid supervising or examining
authority, then for the purpose of this Section 6.13, the combined capital and
surplus of such corporation shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. If at
any time the CARAT Owner Trustee shall cease to be eligible in accordance with
the provisions of this Section 6.13, the CARAT Owner Trustee shall resign
immediately in the manner and with the effect specified in Section 6.10.

                                  ARTICLE VII
                         TERMINATION OF TRUST AGREEMENT

      Section 7.1 Termination of Trust Agreement.

            (a) This Agreement (other than Section 6.9) and the Trust shall
terminate in accordance with Section 3808 of the Statutory Trust Act and be of
no further force or effect on the final distribution by the CARAT Owner Trustee
of all monies or other property or proceeds of the CARAT Owner Trust Estate in
accordance with the terms of the CARAT Indenture, the Trust Sale and
Administration Agreement (including the exercise by the Trust Administrator of
its option to purchase the COLT 2005-SN1 Secured Notes pursuant to Section
8.01(a) of the Trust Sale and Administration Agreement), the Interest Rate Swaps
and Article V. The bankruptcy, liquidation, dissolution, death or incapacity of
any CARAT 2005-SN1 Certificateholder shall not (x) operate to terminate this
Agreement or the Trust, (y) entitle such CARAT 2005-SN1 Certificateholder's
legal representatives or heirs to claim an accounting or to take any action or
proceeding in any court for a partition or winding up of all or any part of the
Trust or the CARAT Owner Trust Estate, or (z) otherwise affect the rights,
obligations and liabilities of the parties hereto.

            (b) Neither the Seller nor any CARAT 2005-SN1 Certificateholder
shall be entitled to revoke or terminate the Trust or this Agreement.

            (c) Subject to Section 5.2(a), notice of any termination of the
Trust, specifying the Distribution Date upon which the CARAT 2005-SN1
Certificateholders shall surrender their CARAT 2005-SN1 Certificates to the
Paying Agent for payment of the final distribution and cancellation, shall be
given by the CARAT Owner Trustee by letter to CARAT 2005-SN1 Certificateholders
mailed within five Business Days of receipt of notice of such termination from
the Trust Administrator given pursuant to Section 8.01(c) of the Trust Sale and
Administration Agreement, stating: (i) the Distribution Date upon or with
respect to which final payment of the CARAT 2005-SN1 Certificates shall be made
upon presentation and surrender of the CARAT 2005-SN1 Certificates at the office
of the Paying Agent therein designated; (ii) the amount of any such final
payment; and (iii) that the Record Date otherwise applicable to such

                                       23

<PAGE>

Distribution Date is not applicable, payments being made only upon presentation
and surrender of the CARAT 2005-SN1 Certificates at the office of the Paying
Agent therein specified. The CARAT Owner Trustee shall give such notice to the
Certificate Registrar (if other than the CARAT Owner Trustee) and the Paying
Agent at the time such notice is given to CARAT 2005-SN1 Certificateholders.
Upon presentation and surrender of the CARAT 2005-SN1 Certificates, the Paying
Agent shall cause to be distributed to CARAT 2005-SN1 Certificateholders amounts
distributable on such Distribution Date pursuant to Section 5.2.

            (d) If all of the CARAT 2005-SN1 Certificateholders shall not
surrender their CARAT 2005-SN1 Certificates for cancellation within six months
after the date specified in the written notice referred to in Section 7.1(c),
the CARAT Owner Trustee shall give a second written notice to the remaining
CARAT 2005-SN1 Certificateholders to surrender their CARAT 2005-SN1 Certificates
for cancellation and receive the final distribution with respect thereto. If
within one year after the second notice all the CARAT 2005-SN1 Certificates
shall not have been surrendered for cancellation, the CARAT Owner Trustee may
take appropriate steps, or may appoint an agent to take appropriate steps, to
contact the remaining CARAT 2005-SN1 Certificateholders concerning surrender of
their CARAT 2005-SN1 Certificates, and the cost thereof shall be paid out of the
funds and other assets that shall remain subject to this Agreement. Subject to
applicable laws with respect to escheat of funds, any funds remaining in the
Trust after exhaustion of such remedies in the preceding sentence shall be
deemed property of the Seller and distributed by the CARAT Owner Trustee to the
Seller, and the CARAT Owner Trustee shall have no further liability to the CARAT
2005-SN1 Certificateholders with respect thereto.

            (e) Upon the winding up and termination of the Trust in accordance
with Section 3808 of the Statutory Trust Act and this Section, the CARAT Owner
Trustee shall cause the Certificate of Trust to be canceled by filing a
certificate of cancellation with the Secretary of State in accordance with the
provisions of Section 3810 of the Statutory Trust Act.

                                  ARTICLE VIII
                                   AMENDMENTS

      Section 8.1 Amendments Without Consent of Certificateholders or
Noteholders. This Agreement may be amended by the Seller and the CARAT Owner
Trustee without the consent of any of the CARAT 2005-SN1 Noteholders, or the
CARAT 2005-SN1 Certificateholders (but with prior notice to the Rating
Agencies), to (i) cure any ambiguity, (ii) correct or supplement any provision
in this Agreement that may be defective or inconsistent with any other provision
in this Agreement or any other CARAT Basic Document, (iii) add or supplement any
credit enhancement for the benefit of the CARAT 2005-SN1 Noteholders or the
CARAT 2005-SN1 Certificateholders (provided, however, that if any such addition
shall affect any class of CARAT 2005-SN1 Noteholders or CARAT 2005-SN1
Certificateholders differently than any other class of CARAT 2005-SN1
Noteholders or CARAT 2005-SN1 Certificateholders, then such addition shall not,
as evidenced by an Opinion of Counsel, adversely affect in any material respect
the interests of any class of the CARAT 2005-SN1 Noteholders or the CARAT
2005-SN1 Certificateholders), (iv) add to the covenants, restrictions or
obligations of the Seller or the CARAT Owner Trustee, (v) evidence and provide
for the acceptance of the appointment of a successor trustee with respect to the
CARAT Owner Trust Estate and add to or change any

                                       24

<PAGE>

provisions as shall be necessary to facilitate the administration of the trusts
hereunder by more than one trustee pursuant to Article VI, and (vi) add, change
or eliminate any other provision of this Agreement in any manner that shall not,
as evidenced by an Opinion of Counsel, adversely affect in any material respect
the interests of the CARAT 2005-SN1 Noteholders or the Unaffiliated
Certificateholders.

      Section 8.2 Amendments With Consent of CARAT 2005-SN1 Certificateholders
and CARAT 2005-SN1 Noteholders. This Agreement may also be amended from time to
time by the Seller and the CARAT Owner Trustee with the consent of CARAT
2005-SN1 Noteholders whose CARAT 2005-SN1 Notes evidence not less than a
majority of the Outstanding Amount of the Controlling Class as of the close of
the preceding Distribution Date and, if any Person other than the Seller or an
Affiliate of the Seller holds any CARAT 2005-SN1 Certificates, the consent of
CARAT 2005-SN1 Certificateholders whose CARAT 2005-SN1 Certificates evidence not
less than a majority of the Voting Interests as of the close of the preceding
Distribution Date, (which consent, whether given pursuant to this Section 8.2 or
pursuant to any other provision of this Agreement, shall be conclusive and
binding on such Person and on all future holders of such CARAT 2005-SN1 Notes or
CARAT 2005-SN1 Certificates and of any CARAT 2005-SN1 Notes or CARAT 2005-SN1
Certificates issued upon the transfer thereof or in exchange thereof or in lieu
thereof whether or not notation of such consent is made upon the CARAT 2005-SN1
Notes or CARAT 2005-SN1 Certificates) for the purpose of adding any provisions
to or changing in any manner or eliminating any of the provisions of this
Agreement, or of modifying in any manner the rights of the CARAT 2005-SN1
Noteholders or the CARAT 2005-SN1 Certificateholders; provided, however, that no
such amendment shall (a) increase or reduce in any manner the amount of, or
accelerate or delay the timing of, collections of payments on CARAT 2005-SN1
Secured Notes or distributions that shall be required to be made on any CARAT
2005-SN1 Note or the Interest Rate for any class of CARAT 2005-SN1 Notes or (b)
reduce the aforesaid percentage required to consent to any such amendment,
without the consent of the holders of all CARAT 2005-SN1 Notes and all of the
Voting Interests with respect to CARAT 2005-SN1 Certificates then outstanding.
The CARAT Owner Trustee shall furnish notice to each of the Rating Agencies
prior to obtaining consent to any proposed amendment under this Section 8.2.

      Section 8.3 Form of Amendments.

            (a) Promptly after the execution of any amendment, supplement or
consent pursuant to Section 8.1 or 8.2, the CARAT Owner Trustee shall furnish
written notification of the substance of such amendment or consent to each CARAT
2005-SN1 Certificateholder, each Unaffiliated Certificateholder and the CARAT
Indenture Trustee.

            (b) It shall not be necessary for the consent of CARAT 2005-SN1
Certificateholders or the CARAT 2005-SN1 Noteholders pursuant to Section 8.2 to
approve the particular form of any proposed amendment or consent, but it shall
be sufficient if such consent shall approve the substance thereof. The manner of
obtaining such consents (and any other consents of CARAT 2005-SN1
Certificateholders and Unaffiliated Certificateholders provided for in this
Agreement or in any other CARAT Basic Document) and of evidencing the
authorization of the execution thereof by CARAT 2005-SN1 Certificateholders and
Unaffiliated

                                       25

<PAGE>

Certificateholders shall be subject to such reasonable requirements as the CARAT
Owner Trustee may prescribe.

            (c) Promptly after the execution of any amendment to the Certificate
of Trust, the CARAT Owner Trustee shall cause the filing of such amendment with
the Secretary of State.

            (d) Prior to the execution of any amendment to this Agreement or the
Certificate of Trust, the CARAT Owner Trustee shall be entitled to receive and
conclusively rely upon an Opinion of Counsel stating that the execution of such
amendment by it is authorized or permitted by this Agreement. The CARAT Owner
Trustee may, but shall not be obligated to, enter into any such amendment which
affects the CARAT Owner Trustee's own rights, duties or immunities under this
Agreement or otherwise.

                                   ARTICLE IX
                                  MISCELLANEOUS

      Section 9.1 No Legal Title to CARAT Owner Trust Estate. The CARAT 2005-SN1
Certificateholders shall not have legal title to any part of the CARAT Owner
Trust Estate. The CARAT 2005-SN1 Certificateholders shall be entitled to receive
distributions with respect to their undivided ownership interest therein only in
accordance with Articles V and VII. No transfer, by operation of law or
otherwise, of any right, title, and interest of the CARAT 2005-SN1
Certificateholders to and in their ownership interest in the CARAT Owner Trust
Estate shall operate to terminate this Agreement or the trusts hereunder or
entitle any transferee to an accounting or to the transfer to it of legal title
to any part of the CARAT Owner Trust Estate.

      Section 9.2 Limitations on Rights of Others. Except for Section 9.12, the
provisions of this Agreement are solely for the benefit of the CARAT Owner
Trustee, the Seller, the CARAT 2005-SN1 Certificateholders, the Trust
Administrator and, to the extent expressly provided herein, the CARAT Indenture
Trustee and the CARAT 2005-SN1 Noteholders, and nothing in this Agreement,
whether express or implied, shall be construed to give to any other Person any
legal or equitable right, remedy or claim in the CARAT Owner Trust Estate or
under or in respect of this Agreement or any covenants, conditions or provisions
contained herein.

      Section 9.3 Derivative Actions. Any provision contained herein to the
contrary notwithstanding, the right of any CARAT 2005-SN1 Certificateholder to
bring a derivative action in the right of the Trust is hereby made expressly
subject to the following limitations and requirements:

            (a) such CARAT 2005-SN1 Certificateholder must meet all requirements
set forth in the Statutory Trust Act; and

            (b) no CARAT 2005-SN1 Certificateholder may bring a derivative
action in the right of the Trust without the prior written consent of CARAT
2005-SN1 Certificateholders owning, in the aggregate, a beneficial interest in
CARAT 2005-SN1 Certificates representing 50% of the then outstanding interest in
the CARAT 2005-SN1 Certificates.

      Section 9.4 Notices. All demands, notices and communications upon or to
the Seller, the Trust Administrator, the CARAT Indenture Trustee, the CARAT
Owner Trustee or the

                                       26

<PAGE>

Rating Agencies under this Agreement shall be delivered as specified in Appendix
B to the Trust Sale and Administration Agreement.

      Section 9.5 Severability. If any one or more of the covenants, agreements,
provisions or terms of this Agreement shall be for any reason whatsoever held
invalid, then such covenants, agreements, provisions or terms shall be deemed
severable from the remaining covenants, agreements, provisions or terms of this
Agreement and shall in no way affect the validity or enforceability of the other
provisions of this Agreement or of the CARAT 2005-SN1 Certificates or the rights
of the holders thereof.

      Section 9.6 Counterparts. This Agreement may be executed by the parties
hereto in separate counterparts, each of which when so executed and delivered
shall be an original, but all such counterparts shall together constitute one
and the same instrument.

      Section 9.7 Successors and Assigns. All covenants and agreements contained
herein shall be binding upon, and inure to the benefit of, the Seller, the CARAT
Owner Trustee and each CARAT 2005-SN1 Certificateholder and their respective
successors and permitted assigns, all as herein provided. Any request, notice,
direction, consent, waiver or other instrument or action by a CARAT 2005-SN1
Certificateholder shall bind the successors and assigns of such CARAT 2005-SN1
Certificateholder.

      Section 9.8 No Petition. The CARAT Owner Trustee by entering this Trust
Agreement and each CARAT 2005-SN1 Certificateholder or CARAT 2005-SN1
Certificate Owner by accepting a CARAT 2005-SN1 Certificate (or interest
therein) issued hereunder, hereby covenant and agree that they shall not (nor
shall they join with or solicit another person to), prior to the day that is one
year and one day after the termination of this Agreement and of each other trust
heretofore formed by the Seller, acquiesce, petition or otherwise invoke or
cause the Seller or the Trust to invoke in any court or government authority for
the purpose of commencing or sustaining a case against the Seller or the Trust
under any federal or state bankruptcy, insolvency or similar law or appointing a
receiver, liquidator, assignee, trustee, custodian, sequestrator or other
similar official of the Seller or the Trust or any substantial part of its
property, or ordering the winding up or liquidation of the affairs of the Seller
or the Trust.

      Section 9.9 No Recourse. Each CARAT 2005-SN1 Certificateholder by
accepting a CARAT 2005-SN1 Certificate (or any interest therein) acknowledges
that such Person's CARAT 2005-SN1 Certificate (or interest therein) represents
beneficial interests in the Trust only and does not represent interests in or
obligations of the Seller, the Trust Administrator, the CARAT Owner Trustee, the
CARAT Indenture Trustee or any Affiliate thereof and no recourse, either
directly or indirectly, may be had against such parties or their assets, except
as may be expressly set forth or contemplated in this Agreement, the CARAT
2005-SN1 Certificates or the CARAT Basic Documents. Except as expressly provided
in the CARAT Basic Documents, none of the Seller, the Trust Administrator or the
CARAT Owner Trustee in their respective individual capacities, or any of their
respective partners, beneficiaries, agents, officers, directors, employees or
successors or assigns, shall be personally liable for, or shall recourse be had
to any of them for the distribution of any amount with respect to the CARAT
2005-SN1 Certificates or the Trust's performance of, or omission to perform, any
obligations or indemnifications contained in the CARAT 2005-SN1 Certificates,
this Agreement or the CARAT Basic Documents, it being

                                       27

<PAGE>

expressly understood that such CARAT 2005-SN1 Certificateholder obligations have
been made solely by the Trust. Each CARAT 2005-SN1 Certificateholder by the
acceptance of a CARAT 2005-SN1 Certificate (or beneficial interest therein)
agrees except as expressly provided in the CARAT Basic Documents, in the event
of nonpayment of any amounts with respect to the CARAT 2005-SN1 Certificates, it
shall have no claim against any of the foregoing Persons for any deficiency,
loss or claim therefrom. In the event that any of the foregoing covenants of
each CARAT 2005-SN1 Certificateholder and CARAT 2005-SN1 Certificate Owner is
prohibited by, or declared illegal or otherwise unenforceable against any such
CARAT 2005-SN1 Certificateholder or CARAT 2005-SN1 Certificate Owner under
applicable law by any court or other authority of competent jurisdiction, and,
as a result, a CARAT 2005-SN1 Certificateholder or CARAT 2005-SN1 Certificate
Owner is deemed to have an interest in any assets of the Seller or any Affiliate
of the Seller other than the Trust ("other assets"), each CARAT 2005-SN1
Certificateholder and CARAT 2005-SN1 Certificate Owner agrees that (i) its claim
against any such other assets shall be, and hereby is, subject and subordinate
in all respects to the rights of other Persons to whom rights in the other
assets have been expressly granted ("entitled Persons"), including to the
payment in full of all amounts owing to such entitled Persons, and (ii) the
covenant set forth in the preceding clause (i) constitutes a "subordination
agreement" within the meaning of, and subject to, Section 510(a) of the
Bankruptcy Code.

      Section 9.10 Headings. The headings of the various Articles and Sections
herein are for convenience of reference only and shall not define or limit any
of the terms or provisions hereof.

      Section 9.11 Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF DELAWARE, WITHOUT
REGARD TO THE PRINCIPLES OF CONFLICTS OF LAWS THEREOF OR OF ANY OTHER
JURISDICTION, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER
SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

      Section 9.12 Indemnification by and Reimbursement of the Trust
Administrator. The CARAT Owner Trustee acknowledges and agrees to reimburse (i)
the Trust Administrator and its directors, officers, employees and agents in
accordance with Section 6.03(b) of the Trust Sale and Administration Agreement
and (ii) the Seller and its directors, officers, employees and agents in
accordance with Section 3.04 of the Trust Sale and Administration Agreement. The
CARAT Owner Trustee further acknowledges and accepts the conditions and
limitations with respect to the Trust Administrator's obligation to indemnify,
defend and hold the CARAT Owner Trustee harmless as set forth in Section
6.01(a)(iii) of the Trust Sale and Administration Agreement.

      Section 9.13 Effect of Amendment and Restatement. It is the intent of the
parties hereto that this Trust Agreement shall as of April 28, 2005, replace in
its entirety the Original Trust Agreement; provided, however, that with respect
to the period of time from April 4, 2005 through April 28, 2005, the rights and
obligations of the parties shall be governed by the Original Trust Agreement;
and provided, further, that the amendment and restatement of the Original Trust
Agreement shall not affect any of the grants, conveyances or transfers
contemplated by the Original Trust Agreement to have occurred prior to the date
hereof.

                                       28

<PAGE>

      Section 9.14 Transfer Restrictions on CARAT 2005-SN1 Certificates. It is
the intent of the parties hereto that the CARAT 2005-SN1 Certificates (or an
interest therein) may be acquired by or for the account of Benefit Plan only if
(a)(i) the CARAT 2005-SN1 Certificates are eligible to be purchased under, and
satisfy all conditions for relief under, one of the underwriter exemptions
listed in footnote 1 of Department of Labor Prohibited Transaction Exemption
2002-41 (67 Fed. Reg. 54487 (August 22, 2002)) or any amendments thereto; and
(ii) it is an "accredited investor" as defined in Rule 501(a)(1) of Regulation D
under the Securities Act, and any holder of the CARAT 2005-SN1 Certificates that
is a Benefit Plan shall be deemed to have represented and warranted that it is
an "accredited investor;" or (b) it is an insurance company general account that
satisfies the requirements of Section III of Prohibited Transaction Class
Exemption 95-60. Unless the Seller determines that an exemption described in the
preceding sentence is available, by accepting and holding a CARAT 2005-SN1
Certificate (or interest therein), the holder thereof shall be deemed to have
represented and warranted that it is not a Benefit Plan and, if requested to do
so by the Seller pursuant to Section 3.4(b), the CARAT 2005-SN1
Certificateholder shall execute and deliver to the CARAT Owner Trustee an
undertaking letter in the form set forth in Exhibit C.

                                       29

<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Trust
Agreement to be duly executed by their respective officers hereunto duly
authorized, as of the day and year first above written.

                                               DEUTSCHE BANK TRUST COMPANY
                                               DELAWARE, as CARAT Owner Trustee

                                               By: /s/ Elizabeth B. Ferry
                                               Name: Elizabeth B. Ferry
                                               Title: Assistant Vice President

                                               CAPITAL AUTO RECEIVABLES, INC.

                                               By: /s/ C. J. Vannatter
                                               Name: C. J. Vannatter
                                               Title: Vice President

Acknowledged and Accepted:

DEUTSCHE BANK TRUST
COMPANY AMERICAS, as Paying Agent

By: /s/ Eva Aryeetey
Name: Eva Aryeetey
Title: Assistant Vice President

                                                  CARAT 2005-SN1 Trust Agreement

                                      S-1

<PAGE>

                                                                       EXHIBIT A

                       FORM OF CARAT 2005-SN1 CERTIFICATE

NUMBER R-                                      $[_________]% Percentage Interest

                       SEE REVERSE FOR CERTAIN DEFINITIONS

      THIS CARAT 2005-SN1 CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE
      SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), AND THE VARIOUS STATE
      SECURITIES LAWS. NO TRANSFER OF THIS CARAT 2005-SN1 CERTIFICATE SHALL BE
      MADE UNLESS SUCH TRANSFER IS MADE IN A TRANSACTION THAT DOES NOT REQUIRE
      REGISTRATION UNDER THE ACT OR ANY APPLICABLE STATE SECURITIES LAWS AND IS
      OTHERWISE IN COMPLIANCE WITH THE RESTRICTIONS SET FORTH IN THE TRUST
      AGREEMENT.

      THIS CARAT 2005-SN1 CERTIFICATE (OR AN INTEREST HEREIN) MAY BE ACQUIRED BY
      OR FOR THE ACCOUNT OF (i) AN "EMPLOYEE BENEFIT PLAN" (AS DEFINED IN
      SECTION 3(3) OF THE UNITED STATES EMPLOYEE RETIREMENT INCOME SECURITY ACT
      OF 1974, AS AMENDED ("ERISA")), THAT IS SUBJECT TO THE PROVISIONS OF TITLE
      I OF ERISA, (ii) A "PLAN" DESCRIBED IN SECTION 4975(e)(1) OF THE INTERNAL
      REVENUE CODE OF 1986, AS AMENDED (THE "CODE"), OR (iii) ANY ENTITY WHOSE
      UNDERLYING ASSETS INCLUDE PLAN ASSETS BY REASON OF A PLAN'S INVESTMENT IN
      THE ENTITY (EACH, A "BENEFIT PLAN") ONLY IF (A)(i) THIS CARAT 2005-SN1
      CERTIFICATE IS ELIGIBLE TO BE PURCHASED UNDER, AND SATISFIES ALL
      CONDITIONS FOR RELIEF UNDER, ONE OF THE UNDERWRITER EXEMPTIONS LISTED IN
      FOOTNOTE 1 OF DEPARTMENT OF LABOR PROHIBITED TRANSACTION EXEMPTION 2002-41
      (67 FED. REG. 54487 (AUGUST 22, 2002)), OR ANY AMENDMENTS THERETO; AND
      (ii) IT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1) OF
      REGULATION D UNDER THE ACT, AND ANY HOLDER OF THIS CARAT 2005-SN1
      CERTIFICATE THAT IS A BENEFIT PLAN SHALL BE DEEMED TO HAVE REPRESENTED AND
      WARRANTED THAT IT IS AN "ACCREDITED INVESTOR"; OR (B) IT IS AN INSURANCE
      COMPANY GENERAL ACCOUNT THAT SATISFIES THE REQUIREMENTS OF SECTION III OF
      PROHIBITED TRANSACTION CLASS EXEMPTION 95-60.

                  CAPITAL AUTO RECEIVABLES ASSET TRUST 2005-SN1

                            ASSET BACKED CERTIFICATE

                                     A-1-1

<PAGE>

      evidencing a fractional undivided interest in the Trust, as defined below,
      the property of which includes the COLT 2005-SN1 Secured Notes sold to the
      Trust by Capital Auto Receivables, Inc.

      (This CARAT 2005-SN1 Certificate does not represent an interest in or
      obligation of Capital Auto Receivables, Inc., General Motors Acceptance
      Corporation or General Motors Corporation or any of their respective
      affiliates, except to the extent described in the CARAT Basic Documents.)

            THIS CERTIFIES THAT Capital Auto Receivables, Inc. is the registered
owner of a nonassessable, fully-paid, fractional undivided interest in Capital
Auto Receivables Asset Trust 2005-SN1 (the "Trust") formed by Capital Auto
Receivables, Inc., a Delaware corporation. The percentage interest in the Trust
evidenced by this CARAT 2005-SN1 Certificate is [ ]%.

            The Trust was created pursuant to a trust agreement, dated as of
April 4, 2005 (as amended and restated as of April 28, 2005 and as it may be
amended from time to time, the "Trust Agreement"), between the Seller and
Deutsche Bank Trust Company Delaware, as owner trustee (the "CARAT Owner
Trustee"), a summary of certain of the pertinent provisions of which is set
forth below. To the extent not otherwise defined herein, the capitalized terms
used herein have the meanings assigned to them in the Trust Agreement.

            This CARAT 2005-SN1 Certificate is one of the duly authorized CARAT
2005-SN1 Certificates designated as Asset Backed Certificates (the "CARAT
2005-SN1 Certificates"). This CARAT 2005-SN1 Certificate is issued under and is
subject to the terms, provisions and conditions of the Trust Agreement, the
terms of which are incorporated herein by reference and made a part hereof, to
which Trust Agreement the holder of this CARAT 2005-SN1 Certificate by virtue of
the acceptance hereof assents and by which such holder is bound.

            Under the Trust Agreement, there shall be distributed on the 15th
day of each month or, if such 15th day is not a Business Day, the next Business
Day, commencing on May 16, 2005 (each, a "Distribution Date"), to the person in
whose name this CARAT 2005-SN1 Certificate is registered on the related Record
Date (as defined below), such amount as is provided in the CARAT Basic
Documents. The "Record Date," with respect to any Distribution Date, means the
last day of the preceding Monthly Period.

            The distributions in respect of this CARAT 2005-SN1 Certificate are
payable in such coin or currency of the United States of America as at the time
of payment is legal tender for payment of public and private debts. All payments
made by the Trust with respect to this CARAT 2005-SN1 Certificate shall be
applied in respect of this CARAT 2005-SN1 Certificate.

            The holder of this CARAT 2005-SN1 Certificate acknowledges and
agrees that its rights to receive distributions in respect of this CARAT
2005-SN1 Certificate are subordinated to the rights of the CARAT 2005-SN1
Noteholders as and to the extent described in the Trust Sale and Administration
Agreement.
                                     A-1-2

<PAGE>

            It is the intent of the Seller, the CARAT Owner Trustee and the
CARAT 2005-SN1 Certificateholders that, for purposes of federal income, state
and local income and franchise taxes, Michigan single business tax and any other
taxes imposed upon, measured by or based upon gross or net income, the Trust
shall be treated as either (A) a division of the Seller, or any other single
Person, and disregarded as a separate entity, if all CARAT 2005-SN1 Certificates
are owned solely by the Seller or by such single Person, or (B) a partnership if
the CARAT 2005-SN1 Certificates are owned by more than one Person. Except as
otherwise required by appropriate taxing authorities, the Seller and the other
CARAT 2005-SN1 Certificateholders by acceptance of a CARAT 2005-SN1 Certificate
agree to treat, and to take no action inconsistent with the treatment of, the
CARAT 2005-SN1 Certificates for such tax purposes as interests in such a
disregarded entity or partnership as described in the previous sentence.

            This CARAT 2005-SN1 Certificate (or an interest therein) may be
acquired by or for the account of a Benefit Plan only if (a)(i) this CARAT
2005-SN1 Certificate is eligible to be purchased under, and satisfies all
conditions for relief under, one of the underwriter exemptions listed in
footnote 1 of Department of Labor Prohibited Transaction Exemption 2002-41 (67
Fed. Reg. 54487 (August 22, 2002)) or any amendments thereto; and (ii) it is an
"accredited investor" as defined in Rule 501(a)(1) of Regulation D under the
Securities Act, and any holder of this CARAT 2005-SN1 Certificate that is a
Benefit Plan shall be deemed to have represented and warranted that it is an
"accredited investor"; or (b) it is an insurance company general account that
satisfies the requirements of Section III of Prohibited Transaction Class
Exemption 95-60. Unless the Seller determines the exemption in clause (a) or (b)
is available, by accepting and holding this CARAT 2005-SN1 Certificate (or
interest therein), the holder hereof shall be deemed to have represented and
warranted that it is not a Benefit Plan and, if requested to do so by the Seller
pursuant to Section 3.4(b), shall execute and deliver to the CARAT Owner Trustee
an undertaking letter in the form set forth in Exhibit C to the Trust Agreement.

            Each CARAT 2005-SN1 Certificateholder or CARAT 2005-SN1 Certificate
Owner by its acceptance of a CARAT 2005-SN1 Certificate (or an interest therein)
covenants and agrees that such CARAT 2005-SN1 Certificateholder or CARAT
2005-SN1 Certificate Owner shall not, prior to the date which is one year and
one day after the termination of the Trust, acquiesce, petition or otherwise
invoke or cause the Seller or the CARAT Owner Trustee to invoke the process of
any court or governmental authority for the purpose of commencing or sustaining
a case against the Seller or the CARAT Owner Trustee under any federal or state
bankruptcy, insolvency, reorganization or similar law or appointing a receiver,
liquidator, assignee, trustee, custodian, sequestrator or other similar official
of the Seller or the CARAT Owner Trustee or any substantial part of its
property, or ordering the winding up or liquidation of the affairs of the Seller
or the CARAT Owner Trustee.

            Except as otherwise provided in the Trust Agreement, distributions
on this CARAT 2005-SN1 Certificate shall be made as provided in the Trust
Agreement by the CARAT Owner Trustee by wire transfer or check mailed to the
CARAT 2005-SN1 Certificateholder of record in the CARAT 2005-SN1 Certificate
Register without the presentation or surrender of this CARAT 2005-SN1
Certificate or the making of any notation hereon. Except as otherwise provided
in the Trust Agreement and notwithstanding the above, the final distribution on
this CARAT 2005-SN1 Certificate shall be made after due notice by the CARAT
Owner Trustee of the pendency of such distribution and only upon presentation
and surrender of this CARAT

                                     A-1-3

<PAGE>

2005-SN1 Certificate at the office maintained for such purpose by the CARAT
Owner Trustee in the Borough of Manhattan, the City of New York.

            Reference is hereby made to the further provisions of this CARAT
2005-SN1 Certificate set forth on the reverse hereof, which further provisions
shall for all purposes have the same effect as if set forth at this place.

            Unless the certificate of authentication hereon shall have been
executed by an authorized officer of the CARAT Owner Trustee by manual
signature, this CARAT 2005-SN1 Certificate shall not entitle the holder hereof
to any benefit under the Trust Agreement or the Trust Sale and Administration
Agreement or be valid for any purpose.

            THIS CARAT 2005-SN1 CERTIFICATE SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF DELAWARE, WITHOUT REGARD TO
THE PRINCIPLES OF CONFLICTS OF LAW THEREOF OR OF ANY OTHER JURISDICTION, AND THE
OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER SHALL BE DETERMINED IN
ACCORDANCE WITH SUCH LAWS.

                                     A-1-4

<PAGE>

            IN WITNESS WHEREOF, the CARAT Owner Trustee, on behalf of the Trust
and not in its individual capacity, has caused this CARAT 2005-SN1 Certificate
to be duly executed.

Dated: ____________________, 2005          CAPITAL AUTO RECEIVABLES ASSET
                                           TRUST 2005-SN1

                                           DEUTSCHE BANK TRUST COMPANY
                                           DELAWARE, not in its individual
                                           capacity but solely as Owner Trustee

                                           By: _________________________________
                                           Name: _______________________________
                                           Title: ______________________________

                  OWNER TRUSTEE'S CERTIFICATE OF AUTHENTICATION

      This is one of the CARAT 2005-SN1 Certificates referred to in the
within-mentioned Trust Agreement.

DEUTSCHE BANK TRUST COMPANY                DEUTSCHE BANK TRUST COMPANY
DELAWARE, not in its individual            DELAWARE, not in its individual
capacity but solely as CARAT Owner         capacity but solely as CARAT Owner
Trustee,                                   Trustee,
                                           by Deutsche Bank Trust Company
                                           Americas, as Authenticating Agent

By: _________________________________      By: _________________________________
Name: _______________________________      Name: _______________________________
Title: ______________________________      Title: ______________________________


                                     A-1-5

<PAGE>

                             REVERSE OF CERTIFICATE

            The CARAT 2005-SN1 Certificates do not represent an obligation of,
or an interest in, the Seller, the Trust Administrator, General Motors
Corporation, the CARAT Indenture Trustee, the CARAT Owner Trustee or any
affiliates of any of them and no recourse may be had against such parties or
their assets, except as may be expressly set forth or contemplated herein or in
the Trust Agreement or the Basic Documents. In addition, this CARAT 2005-SN1
Certificate is not guaranteed by any governmental agency or instrumentality and
is limited in right of payment to certain collections and recoveries with
respect to the CARAT 2005-SN1 Secured Notes (and certain other amounts), all as
more specifically set forth herein and in the Basic Documents. A copy of each of
the CARAT Basic Documents may be examined during normal business hours at the
principal office of the Seller, and at such other places, if any, designated by
the Seller, by any CARAT 2005-SN1 Certificateholder upon written request. In the
event of any conflict between the terms of this CARAT 2005-SN1 Certificate and
the terms of the Basic Documents, the terms of the Basic Documents shall govern.

            The Trust Agreement permits, with certain exceptions provided
therein, the amendment thereof and the modification of the rights and
obligations of the Seller and the rights of the CARAT 2005-SN1
Certificateholders under the Trust Agreement at any time by the Seller and the
CARAT Owner Trustee with the consent of the Holders of the CARAT 2005-SN1 Notes
evidencing not less than a majority of the Outstanding Amount of the Controlling
Class as of the close of the preceding Distribution Date and, if any Person
other than the Seller or an Affiliate of the Seller holds any CARAT 2005-SN1
Certificates, the consent of CARAT 2005-SN1 Certificateholders whose CARAT
2005-SN1 Certificates evidence not less than a majority of the Voting Interests
as of the close of the preceding Distribution Date. Any such consent by the
Holder of this CARAT 2005-SN1 Certificate shall be conclusive and binding on
such Holder and on all future Holders of this CARAT 2005-SN1 Certificate and of
any CARAT 2005-SN1 Certificate issued upon the transfer hereof or in exchange
herefor or in lieu hereof whether or not notation of such consent is made upon
this CARAT 2005-SN1 Certificate. The Trust Agreement also permits the amendment
thereof, in certain circumstances, without the consent of the Holders of any of
the CARAT 2005-SN1 Certificates or the CARAT 2005-SN1 Notes.

            As provided in the Trust Agreement and subject to certain
limitations therein set forth, the transfer of this CARAT 2005-SN1 Certificate
is registerable in the CARAT 2005-SN1 Certificate Register upon surrender of
this CARAT 2005-SN1 Certificate for registration of transfer at the offices or
agencies of the CARAT 2005-SN1 Certificate Registrar maintained by the CARAT
Owner Trustee in the City of New York, accompanied by a written instrument of
transfer in form satisfactory to the CARAT Owner Trustee and the CARAT 2005-SN1
Certificate Registrar duly executed by the Holder hereof or such Holder's
attorney duly authorized in writing, and thereupon one or more new CARAT
2005-SN1 Certificates of authorized denominations evidencing the same aggregate
interest in the Trust will be issued to the designated transferee. The initial
CARAT 2005-SN1 Certificate Registrar appointed under the Trust Agreement is
Deutsche Bank Trust Company Americas, New York, New York.

            The CARAT 2005-SN1 Certificates are issuable only as registered
CARAT 2005-SN1 Certificates without coupons in denominations of $20,000 or
integral multiples of $1,000 in excess thereof; provided, however, that one
CARAT 2005-SN1 Certificate may be issued in a

                                     A-1-6

<PAGE>

denomination that includes any residual amount. As provided in the Trust
Agreement and subject to certain limitations therein set forth, CARAT 2005-SN1
Certificates are exchangeable for new CARAT 2005-SN1 Certificates of authorized
denominations evidencing the same aggregate denomination, as requested by the
Holder surrendering the same; provided, however, that no CARAT 2005-SN1
Certificate may be subdivided such that the denomination of any resulting CARAT
2005-SN1 Certificate is less than $20,000. No service charge shall be made for
any such registration of transfer or exchange, but the CARAT Owner Trustee or
the CARAT 2005-SN1 Certificate Registrar may require payment of a sum sufficient
to cover any tax or governmental charge payable in connection therewith.

            The CARAT Owner Trustee, the CARAT 2005-SN1 Certificate Registrar
and any agent of the CARAT Owner Trustee or the CARAT 2005-SN1 Certificate
Registrar may treat the Person in whose name this CARAT 2005-SN1 Certificate is
registered as the owner hereof for all purposes, and none of the CARAT Owner
Trustee, the CARAT 2005-SN1 Certificate Registrar or any such agent shall be
affected by any notice to the contrary.

            The obligations and responsibilities created by the Trust Agreement
and the Trust created thereby shall terminate in accordance with Article VII of
the Trust Agreement.

                                     A-1-7

<PAGE>

                                   ASSIGNMENT

            FOR VALUE RECEIVED the undersigned hereby sells, assigns and
transfers unto

PLEASE INSERT SOCIAL SECURITY
OR OTHER IDENTIFYING NUMBER
OF ASSIGNEE

__________________________________________________________________

(Please print or type name and address, including postal zip code, of assignee)

__________________________________________________________________

the within CARAT 2005-SN1 Certificate, and all rights thereunder, hereby
irrevocably constituting and appointing

_________________________________________________________ Attorney to transfer
said CARAT 2005-SN1 Certificate on the books of the CARAT 2005-SN1 Certificate
Registrar, with full power of substitution in the premises.

Dated:                                           _____________________________*
                                                 Signature Guaranteed:

                                                 _____________________________*

* NOTICE: The signature to this assignment must correspond with the name as it
appears upon the face of the within CARAT 2005-SN1 Certificate in every
particular, without alteration, enlargement or any change whatever. Such
signature must be guaranteed by a member firm of the New York Stock Exchange or
a commercial bank or trust company.

                                     A-1-8

<PAGE>

                                                                       EXHIBIT B

                          CARAT 2005-SN1 CERTIFICATE OF
                  CAPITAL AUTO RECEIVABLES ASSET TRUST 2005-SN1

      THIS CARAT 2005-SN1 Certificate of Capital Auto Receivables Asset Trust
2005-SN1 (the "Trust") is being duly executed and filed by the undersigned, as
trustee, to form a statutory trust under the Delaware Statutory Trust Act (12
Del. C. Section 3801 et seq.) (the "Act").

      1. Name. The name of the statutory trust formed hereby is Capital Auto
Receivables Asset Trust 2005-SN1.

      2. Delaware Trustee. The name and business address of the trustee of the
Trust in the State of Delaware are Deutsche Bank Trust Company Delaware, E.A.
Delle Donne Corporate Center, Montgomery Building, 1011 Centre Road, Wilmington,
Delaware 19805-1266.

      3. This CARAT 2005-SN1 Certificate of Trust shall be effective on
[__________], 2005.

      IN WITNESS WHEREOF, the undersigned has executed this Certificate of Trust
in accordance with Section 3811(a)(1) of the Act.

                                                DEUTSCHE BANK TRUST COMPANY
                                                DELAWARE, not in its individual
                                                capacity but solely as CARAT
                                                Owner Trustee

                                                By: ____________________________
                                                Name:
                                                Title:
<PAGE>

                                                                       EXHIBIT C

                           FORM OF UNDERTAKING LETTER
                                (to be provided)