Document:

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                                                                    EXHIBIT 10.6

(XL CAPITAL ASSURANCE(SM) LOGO)

                                                     1221 Avenue of the Americas
                                                     New York, New York 10020
                                                     Telephone: (212) 478-3400

FINANCIAL GUARANTY INSURANCE POLICY

OBLIGOR: AmeriCredit Automobile Receivables     POLICY NO: CA03541A
Trust 2007-A-X

INSURED OBLIGATION: The $1,200,000,000          EFFECTIVE DATE: January 18, 2007
AmeriCredit Automobile Receivables Trust
2007-A-X Automobile Receivables Asset Backed
Notes, $217,000,000 Class A-1 Notes,
$348,000,000 Class A-2 Notes, $248,000,000
Class A-3 Notes and $387,000,000 Class A-4
Notes, issued by AmeriCredit Automobile
Receivables Trust 2007-A-X pursuant to the
Indenture.

     XL CAPITAL ASSURANCE INC. ("XLCA"), a New York stock insurance company, in
consideration of the payment of the premium, hereby unconditionally and
irrevocably guarantees to the Trustee for the benefit of the Owners of the
Insured Obligations, full and complete payment by the Obligor of Scheduled
Payments in respect of the Insured Obligation, subject only to the terms of this
Policy (which includes the Endorsement(s) attached hereto).

     XLCA will pay the Insured Amount to the Trustee upon the presentation of a
Payment Notice to XLCA on the later of (a) one (1) Business Day following
receipt by XLCA of a Payment Notice or (b) the Business Day on which Scheduled
Payments are due for payment. XLCA shall be subrogated to the Owners' rights to
payment on the Insured Obligations to the extent of any payment by XLCA
hereunder. The obligations of XLCA with respect to a Scheduled Payment will be
discharged to the extent funds to pay such Scheduled Payment are deposited in
the account specified in the Payment Notice, whether such funds are properly
applied by the Trustee or claimed by an Owner.

     In addition, in the event that any Scheduled Payment which has become due
for payment and which is made to an Owner by or on behalf of the Trustee is
recovered or is recoverable from the Owner pursuant to a final order of a court
of competent jurisdiction in an Insolvency Proceeding that such payment
constitutes an avoidable preference to such Owner within the meaning of any
applicable bankruptcy law, XLCA unconditionally and irrevocably guarantees
payment of the amount of such recovery (in accordance with the Endorsement
attached hereto).

     This Policy sets forth in full the undertaking of XLCA and shall not be
cancelled or revoked by XLCA for any reason, including failure to receive
payment of any premium due hereunder or under the Insurance Agreement, and may
not be further endorsed or modified without the written consent of XLCA. The
premium on this Policy is not refundable for any reason. This Policy does not
insure against loss of any prepayment or other acceleration payment which at any
time may become due in respect of any Insured Obligation, other than at the sole
option of XLCA, nor against any risk other than Nonpayment and Avoided Payment,
including any shortfalls, if any, attributable to the liability of the Obligor
for taxes or withholding taxes if any, including interest and penalties in
respect of such liability.

     THIS POLICY IS NOT COVERED BY THE PROPERTY/CASUALTY INSURANCE SECURITY FUND
SPECIFIED IN ARTICLE 76 OF THE NEW YORK INSURANCE LAW.

     Any capitalized terms not defined herein shall have the meaning given such
terms in the Endorsement attached hereto and forming a part hereof, or in the
Insurance Agreement referenced therein. In witness whereof, XLCA has caused this
Policy to be executed as of the Effective Date.

XL CAPITAL ASSURANCE INC.               XL CAPITAL ASSURANCE INC.

/s/ Catherine R. Lau                    /s/ James W. Lundy, Jr.
-------------------------------------   ----------------------------------------
Name: Catherine Lau                     Name: James W. Lundy, Jr.
Title: Senior Managing Director         Title: Associate General Counsel

                                        1

<PAGE>

         FINANCIAL GUARANTY INSURANCE POLICY ENDORSEMENT NO. 1 EFFECTIVE
                 DATE JANUARY 18, 2007, ATTACHED TO AND FORMING
                      PART OF FINANCIAL GUARANTY INSURANCE
                               POLICY NO. CA03541A

<TABLE>
<S>                   <C>
Obligor:              AmeriCredit Automobile Receivables Trust 2007-A-X

Insured Obligation:   $1,200,000,000 AmeriCredit Automobile Receivables Trust
                      2007-A-X Automobile Receivables Asset Backed Notes,
                      $217,000,000 Class A-1 Notes, $348,000,000 Class A-2
                      Notes, $248,000,000 Class A-3 Notes and $387,000,000 Class
                      A-4 Notes, issued by AmeriCredit Automobile Receivables
                      Trust 2007-A-X pursuant to the Indenture

Beneficiary:          Wells Fargo Bank, National Association, as trustee (the
                      "Trustee") under the Indenture dated as of January 9, 2007
                      (the "Indenture") between the Obligor and the Trustee.
</TABLE>

          Capitalized terms used herein and not otherwise defined herein or in
the Policy shall have the meanings assigned to them in the Insurance Agreement,
the Sale and Servicing Agreement or the Indenture as in effect on the date of
execution of this Policy without giving effect to any subsequent amendment or
modification thereto unless such amendment or modification has been approved in
writing by XLCA.

          As used herein the term "Business Day" means any day other than
Saturday or Sunday on which commercial banking institutions in New York, New
York, Minneapolis, Minnesota and the State in which the executive offices of the
Servicer are located are generally open for banking business.

          As used herein the term "Insolvency Proceeding" means the
commencement, after the date hereof, of any bankruptcy, insolvency, readjustment
of debt, reorganization, marshalling of assets and liabilities or similar
proceedings by or against any Person, the commencement, after the date hereof,
of any proceedings by or against any Person for the winding up or liquidation of
its affairs, or the consent, after the date hereof, to the appointment of a
trustee, conservator, receiver or liquidator in any bankruptcy, insolvency,
readjustment of debt, reorganization, marshalling of assets and liabilities or
similar proceedings of or relating to any Person.

          As used herein the term "Insurance Agreement" means the Insurance
Agreement, dated as of January 9, 2007, by and among XLCA, the Obligor,
AmeriCredit, the Servicer, the Custodian, the Seller, the Trustee, the Trust
Collateral Agent, the Collateral Agent and the Backup Servicer,

          As used herein the term "Insured Amount" means, that portion of the
Scheduled Payments that shall become due for payment but shall be unpaid by
reason of Nonpayment.

                                        2

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          As used herein the term "Nonpayment" means, with respect to any
Distribution Date, the failure of the Trustee to receive, in full, in accordance
with the terms of the Indenture that Scheduled Payment that is due for payment
with respect to such date.

          As used herein the term "Owner" means the registered owner of any
Insured Obligation as indicated in the registration books maintained by or on
behalf of the Obligor for such purpose or, if the Insured Obligation is in
bearer form, the holder of the Insured Obligation.

          As used herein, the term "Person" means an individual, a partnership,
a limited liability company, a joint venture, a corporation, a trust, an
unincorporated organization, and a government or any department or agency
thereof.

          As used herein the term "Scheduled Payment" means for any Distribution
Date, the excess, if any (without duplication) of (i) the Noteholders' Interest
Distributable Amount plus the Noteholders' Parity Deficit Amount plus, if such
Distribution Date is the Final Scheduled Distribution Date for any Class of
Notes, the Outstanding Amount of such Class of Notes over (ii) the amount
actually deposited into the Note Distribution Account on or with respect to such
Distribution Date for application to the amounts described in the foregoing
clause (i), in accordance with the original terms of the Insured Obligations and
the Indenture when issued and without regard to any subsequent amendment or
modification of the Insured Obligations or the Indenture that has not been
consented to in writing by XLCA. Notwithstanding the foregoing, "Scheduled
Payments" shall in no event include payments which become due on an accelerated
basis as a result of (a) any default by the Obligor, (b) the occurrence of an
Event of Default under the Indenture, (c) mandatory or optional redemption, in
whole or in part, or (d) any other cause, unless XLCA elects, in its sole
discretion, to pay such amounts in whole or in part (in which event Scheduled
Payments shall include such accelerated payments as, when, and to the extent so
elected by XLCA). In the event that it does not make such election, Scheduled
Payments shall include payments due in accordance with the original scheduled
terms without regard to any acceleration. In addition, "Scheduled Payment" shall
not include, nor shall coverage be provided under the Policy in respect of, (i)
any make whole, redemption or call premium payable in respect of the Insured
Obligations, (ii) any amounts due in respect of the Insured Obligations
attributable to any increase in interest rate, penalty or other sum payable by
the Obligor by reason of any default or event of default in respect of the
Insured Obligations, or by reason of any deterioration of the creditworthiness
of the Obligor or (iii) any taxes, withholding or other charge imposed by any
governmental authority due in connection with the payment of any Scheduled
Payment to any holder of an Insured Obligation.

          As used herein the term "Term of this Policy" means the period from
and including the Effective Date to and including the first date on which (i)
all Scheduled Payments have been paid that are required to be paid by the
Obligor under the Indenture; and (ii) any period during which any Scheduled
Payment could have been avoided in whole or in part as a preference payment
under applicable bankruptcy, insolvency, receivership or similar law has
expired; provided, however, that if any proceedings

                                        3

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requisite to avoidance as a preference payment have been commenced prior to the
occurrence of (i) and (ii) above, and the Owners are ultimately required to
return any Avoided Payment (as defined below) as a result of such proceeding
pursuant to a final and nonappealable order in resolution of any such proceeding
(whether or not such order is entered before or after the occurrence of (i) and
(ii) above), then the Term of the Policy shall terminate on the date on which
XLCA has made all payments required to be made under the terms of this Policy in
respect of all such Avoided Payments.

          To make a claim under the Policy, the Trustee shall deliver to XLCA a
Payment Notice in the form of Exhibit A hereto (a "Payment Notice"),
appropriately completed and executed by the Trustee. A Payment Notice under this
Policy may be presented to XLCA by (i) delivery of the original Payment Notice
to XLCA at its address set forth below, or (ii) facsimile transmission of the
original Payment Notice to XLCA at its facsimile number set forth below. If
presentation is made by facsimile transmission, the Trustee shall (x)
simultaneously confirm transmission by telephone to XLCA at its telephone number
set forth below, and (y) as soon as reasonably practicable, deliver the original
Payment Notice to XLCA at its address set forth below. Any Payment Notice
received by XLCA after 10:00 a.m., New York City time, on a Business Day, or on
any day that is not a Business Day, will be deemed to be received by XLCA at
9:00 a.m., New York City time, on the next succeeding Business Day. XLCA shall
make payments due in respect of Insured Amounts no later than 2:00 p.m. New York
City time to the Trustee upon the presentation of a Payment Notice to XLCA on
the later of (a) one (1) Business Day following receipt by XLCA of a Payment
Notice or (b) the Business Day on which Scheduled Payments are due for payment.

          Subject to the foregoing, if the payment of any amount with respect to
the Scheduled Payment is voided (a "Preference Event") as a result of an
Insolvency Proceeding and as a result of such Preference Event, the Owner is
required to return such voided payment, or any portion of such voided payment,
made in respect of the Insured Obligation (an "Avoided Payment"), XLCA will pay
an amount equal to such Avoided Payment, as and when such payment would
otherwise be due pursuant to the Indenture without regard to acceleration or
prepayment, and upon payment of such Avoided Payment and receipt by XLCA from
the Trustee on behalf of such Owner of (x) a certified copy of a final order of
a court exercising jurisdiction in such Insolvency Proceeding to the effect that
the Owner or the Trustee on behalf of the Owner is required to return any such
payment or portion thereof because such payment was voided under applicable law,
with respect to which order the appeal period has expired without an appeal
having been filed (the "Final Order"), (y) an assignment, substantially in the
form attached hereto as Exhibit B, properly completed and executed by such Owner
irrevocably assigning to XLCA all rights and claims of such Owner relating to or
arising under such Avoided Payment, and (z) a Payment Notice in the form of
Exhibit A hereto appropriately completed and executed by the Trustee.

          XLCA shall make payments due in respect of Avoided Payments no later
than 2:00 p.m. New York City time on the Business Day following XLCA's receipt
of the documents required under clauses (x) through (z) of the preceding
paragraph. Any such documents received by XLCA after 10:00 a.m. New York City
time on any Business Day

                                        4

<PAGE>

or on any day that is not a Business Day shall be deemed to have been received
by XLCA at 9:00 a.m., New York City time, on the next succeeding Business Day.
All payments made by XLCA hereunder on account of any Avoided Payment shall be
disbursed to the receiver, conservator, debtor-in-possession or trustee in
bankruptcy named in the Final Order and not to any Holder directly (unless a
Holder previously paid such amount to the receiver, conservator,
debtor-in-possession or trustee in bankruptcy named in the Final Order, in which
case such payment shall be disbursed to the Trustee for distribution to such
Holder upon proof of such payment reasonably satisfactory to XLCA).

          XLCA hereby waives and agrees not to assert any and all rights to
require the Trustee to make demand on or to proceed against any person, party or
security prior to the Trustee demanding payment under this Policy.

          No defenses, set-offs and counterclaims of any kind available to XLCA
so as to deny payment of any amount due in respect of this Policy will be valid
and XLCA hereby waives and agrees not to assert any and all such defenses
(including without limitation, defense of fraud in the inducement or fact or any
other circumstances which would have the effect of discharging a surety in law
or in equity), set-offs and counterclaims, including, without limitation, any
such rights acquired by subrogation, assignment or otherwise. Upon any payment
hereunder, in furtherance and not in limitation of XLCA's equitable right of
subrogation and XLCA's rights under the Insurance Agreement, XLCA will be
subrogated to the rights of the Owner in respect of which such payment was made
to receive any and all amounts due in respect of the obligations in respect of
which XLCA has made a payment hereunder. Any rights of subrogation acquired by
XLCA as a result of any payment made under this Policy shall, in all respects,
be subordinate and junior in right of payment to the prior indefeasible payment
in full of any amounts due the Owner on account of payments due under the
Insured Obligation.

          This Policy is neither transferable nor assignable, in whole or in
part, except to a successor trustee duly appointed and qualified under the
Indenture. All Payment Notices and other notices, presentations, transmissions,
deliveries and communications made by the Trustee to XLCA with respect to this
Policy shall specifically refer to the number of this Policy and shall be made
to XLCA at:

               XL Capital Assurance Inc.
               1221 Avenue of the Americas
               New York, New York 10020
               Attention: Surveillance
               Telephone: (212) 478-3400
               Facsimile: (212) 478-3597

     or such other address, telephone number or facsimile number as XLCA may
designate to the Trustee in writing from time to time. Each such Payment Notice
and other notice, presentation, transmission, delivery and communication shall
be effective only upon actual receipt by XLCA.

                                        5

<PAGE>

          The obligations of XLCA under this Policy are irrevocable, primary,
absolute and unconditional, subject to satisfaction of the conditions for making
a claim under the Policy, and neither the failure of any Person to perform any
covenant or obligation in favor of XLCA (or otherwise), nor the failure or
omission to make a demand permitted hereunder, nor the failure of any assignment
or grant of any security interest, nor the commencement of any Insolvency
Proceeding by or against the Obligor, the Seller, the Servicer, the Trustee or
any other person shall in any way affect or limit XLCA's obligations under this
Policy. If a successful action or proceeding to enforce this Policy is brought
by the Trustee, the Trustee shall be entitled to recover from XLCA costs and
expenses reasonably incurred, including, without limitation, reasonable fees and
expenses of counsel.

          This Policy and the obligations of XLCA hereunder shall terminate on
the expiration of the Term of this Policy. This Policy shall be returned to XLCA
by the Trustee upon the expiration of the Term of this Policy.

          The foregoing notwithstanding, if an Insolvency Proceeding is existing
by or against the Obligor, the Seller or the Servicer during the one year and
one day period set forth in clauses (ii) or (iii) of the definition of "Term of
this Policy" above, then this Policy and XLCA's obligations hereunder shall
terminate on (and the "Termination Date" shall be) the later of (i) the date of
the conclusion or dismissal of such Insolvency Proceeding without continuing
jurisdiction by the court in such Insolvency Proceeding, and (ii) the date on
which XLCA has made all payments required to be made under the terms of this
Policy in respect of Avoided Payments.

          The Property/Casualty Insurance Security Fund specified in Article 76
of the New York Insurance Law does not cover this Policy. The Florida Insurance
Guaranty Association created under Part II of Chapter 631 of the Florida
Insurance Code does not cover this Policy. In the event that XLCA were to become
insolvent, the California Insurance Guaranty Association, established pursuant
to Article 14.2 of Chapter 1 of Part 2 of Division 1 of the California Insurance
Code excludes from coverage any claims arising under this Policy.

          THIS POLICY SHALL BE CONSTRUED, AND THE OBLIGATIONS, RIGHTS AND
REMEDIES OF THE PARTIES HEREUNDER SHALL BE DETERMINED, IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES
THAT WOULD REQUIRE THE APPLICATION OF THE LAWS OF ANY OTHER JURISDICTION.

          In the event any term or provision of the form of this Policy is
inconsistent with the provision of this Endorsement, the provision of this
Endorsement shall take precedence and be binding.

     [Remainder of Page Intentionally Left Blank]

                                        6

<PAGE>

          IN WITNESS WHEREOF, XL Capital Assurance Inc. has caused this
Endorsement to the Policy to be executed on the Effective Date.

/s/ Catherine Lau                       James W. Lundy, Jr.
-------------------------------------   ----------------------------------------
Name: Catherine Lau                     Name: James W. Lundy, Jr.
Title: Senior Managing Director         Title: Associate General Counsel

Policy No. CA03541A

                                        7

<PAGE>

               EXHIBIT A TO FINANCIAL GUARANTY POLICY NO. CA03541A

XL Capital Assurance Inc.
1221 Avenue of the Americas
New York, New York  10020
Attention: Surveillance

                                 PAYMENT NOTICE
                  UNDER FINANCIAL GUARANTY POLICY NO. CA03541A

          [ Identify Trustee] as Trustee (the "Trustee"), hereby certifies to XL
Capital Assurance Inc. ("XLCA") with reference to that certain Financial
Guaranty Policy, No. CA03541A, dated January 9, 2007 (the "Policy"), issued by
XLCA in favor of the Trustee on behalf of the Owner under the Indenture, as
follows:

          1. The Trustee is the trustee under the Indenture and the beneficiary
on behalf of each Owner of the Policy.

          2. Trustee is entitled to make a demand under the Policy pursuant to
the Sale and Servicing Agreement.

          3. This notice relates to the [insert date] [Distribution Date]. The
amount demanded is to be paid in immediately available funds to the [Specify
Account] at [Identify Financial Institution Holding Account] account number
[_____] which is the "Note Distribution Account."

     [For a Payment Notice in respect of Insured Amounts other than Avoided
Payment, use paragraph 4.]

          4. The Trustee demands payment of $________ which is an amount equal
to [Describe calculation of the Insured Amount under Policy].

     [For a Payment Notice in respect of an Avoided Payment use the following
paragraphs [4] or [5].]

          [4.] or [5.] The Trustee hereby represents and warrants, based upon
information available to it, that (i) the amount entitled to be drawn under the
Policy on the date hereof in respect of Avoided Payments is the amount paid or
to be paid simultaneously with such draw on the Policy, by the Owner on account
of a Preference Event [$________] (the "Avoided Payment Amount"), (ii) the Owner
with respect to which the drawing is being made under the Policy has paid or
simultaneously with such

                                       A-1

<PAGE>

draw on the Policy will pay such Avoided Payment Amount, and (iii) the documents
required by the Policy to be delivered in connection with such Avoided Payment
and Avoided Payment Amount have previously been presented to XLCA or are
attached hereto.

          [6] The Trustee agrees that, following payment of funds by XLCA, it
shall use reasonable efforts to procure (a) that such amounts are applied
directly to the payment of any Insured Amount which is due for payment; (b) that
such funds are not applied for any other purpose; and (c) the maintenance of
accurate record of such payments in respect of the Insured Obligation and the
corresponding claim on the Policy and the proceeds thereof.

          [7] The Trustee, on behalf of itself and the Owners, hereby assigns to
XLCA all rights and claims (including rights of actions and claims in respect of
securities laws violations or otherwise) of the Trustee and the Owners with
respect to the Insured Obligation to the extent of any payments under the
Policy. The foregoing assignment is in addition to, and not in limitation of,
rights of subrogation otherwise available to XLCA in respect of such payments.
The Trustee shall take such action and deliver such instruments as may be
reasonably required by XLCA to effectuate the purposes of the provisions of this
Clause 7.

          [8] The Trustee, on behalf of itself and the Owners, hereby appoints
XLCA as agent and attorney-in-fact for the Trustee and the Owners in any legal
proceeding in respect of the Insured Obligation. The Trustee, on behalf of
itself and the Owners, thereby (and without limiting the generality of the
preceding sentence) agrees that XLCA may at any time during the continuation of
any proceeding by or against any debtor with respect to which a Preference Claim
(as defined below) or other claim with respect to the Insured Obligation is
asserted under any Insolvency Proceeding, direct all matters relating to such
Insolvency Proceeding, including, without limitation, (a) all matters relating
to any claim in connection with a Insolvency Proceeding seeking the avoidance as
a preferential transfer of any payment made with respect to the obligations (a
"Preference Claim"), (b) the direction of any appeal of any order relating to
any Preference Claim and (c) the posting of any surety, supersedes or
performance bond pending any such appeal. In addition, the Trustee, on behalf of
itself and the Owners, hereby agrees that XLCA shall be subrogated to, and the
Trustee, on behalf of itself and the Owners, hereby delegates and assigns, to
the fullest extent permitted by law, the rights of the Trustee and the Owners in
the conduct of any Insolvency Proceeding, including, without limitation, all
rights of any party to an adversary proceeding or action with respect to any
court order issued in connection with any such Insolvency Proceeding, to the
extent of any payment under the Policy.

          Capitalized terms used herein and not otherwise defined herein shall
have the meanings assigned to them in the Policy or the Indenture.

          IN WITNESS WHEREOF, this notice has been executed this ____ day of
________, ____.

                                       A-2

<PAGE>

                                        ____________________, as Trustee

                                        By:
                                            ------------------------------------
                                            Authorized Officer

Any Person Who Knowingly And With Intent To Defraud Any Insurance Company Or
Other Person Files An Application For Insurance Or Statement Of Claim Containing
Any Materially False Information, Or Conceals For The Purpose Of Misleading
Information Concerning Any Fact Material Thereof, Commits A Fraudulent Insurance
Act, Which Is A Crime, And Shall Also Be Subject To A Civil Penalty Not To
Exceed Five Thousand Dollars And The Stated Value Of The Claim For Each Such
Violation

                                       A-3

<PAGE>

         EXHIBIT B TO FINANCIAL GUARANTY INSURANCE POLICY, NO. CA03541A

     FORM OF ASSIGNMENT

     Reference is made to the Financial Guaranty Insurance Policy No. CA03541A,
dated January 18, 2007 (together with the Endorsement attached thereto, the
"Policy") issued by XL Capital Assurance Inc. ("XLCA") relating to the Class
[[]] Notes issued by AmeriCredit Automobile Receivables Trust 2007-A-X pursuant
to that certain Indenture dated as of January 18, 2007. Unless otherwise defined
herein, capitalized terms used in this Assignment shall have the meanings
assigned thereto in the Policy as incorporated by reference therein. In
connection with the Avoided Payment of [$_____] paid by the undersigned (the
"Owner") on [_____] and the payment by XLCA in respect of such Avoided Payment
pursuant to the Policy, the Owner hereby irrevocably and unconditionally,
without recourse, representation or warranty (except as provided below), sells,
assigns, transfers, conveys and delivers all of such Owner's rights, title and
interest in and to any rights or claims, whether accrued, contingent or
otherwise, which the Owner now has or may hereafter acquire, against any person
relating to, arising out of or in connection with such Avoided Payment. The
Owner represents and warrants that such claims and rights are free and clear of
any lien or encumbrance created or incurred by such Owner.(1)

                                        ----------------------------------------
                                        Owner
----------
(1)  In the event that the terms of this form of assignment are reasonably
     determined to be insufficient solely as a result of a change of law or
     applicable rules after the date of the Policy to fully vest all of the
     Owner's right, title and interest in such rights and claims, the Owner and
     XLCA shall agree on such other form as is reasonably necessary to effect
     such assignment, which assignment shall be without recourse, representation
     or warranty except as provided above.<PAGE>

                                                                    EXHIBIT 10.8

                                                                  EXECUTION COPY

                               CUSTODIAN AGREEMENT

                                      AMONG

                      AMERICREDIT FINANCIAL SERVICES, INC.,
                                  AS CUSTODIAN,

                           XL CAPITAL ASSURANCE INC.,
                                   AS INSURER

                                       AND

                     WELLS FARGO BANK, NATIONAL ASSOCIATION,
                            AS TRUST COLLATERAL AGENT

                           DATED AS OF JANUARY 9, 2007

<PAGE>

          THIS CUSTODIAN AGREEMENT, dated as of January 9, 2007, is made with
respect to the issuance of Notes and a Certificate by AmeriCredit Automobile
Receivables Trust 2007-A-X (the "Issuer"), and is between AMERICREDIT FINANCIAL
SERVICES, INC., as custodian (in such capacity, the "Custodian"), XL CAPITAL
ASSURANCE INC. (the "Insurer") and WELLS FARGO BANK, NATIONAL ASSOCIATION, a
national banking association, as Trust Collateral Agent (the "Trustee").
Capitalized terms used herein which are not defined herein shall have the
meanings set forth in the Sale and Servicing Agreement as hereinafter defined.

                                   WITNESSETH:

          WHEREAS, AmeriCredit Financial Services, Inc. ("AFS") and AFS SenSub
Corp. ("AFS SenSub") have entered into a Purchase Agreement dated as of January
9, 2007 (the "Purchase Agreement"), pursuant to which AFS has sold, transferred
and assigned to AFS SenSub all of its right, title and interest in and to the
Receivables;

          WHEREAS, the Issuer, AFS, as Servicer (the "Servicer"), AFS SenSub and
Wells Fargo Bank, National Association, as Trust Collateral Agent and as Backup
Servicer, have entered into a Sale and Servicing Agreement, dated as of January
9, 2007 (the "Sale and Servicing Agreement"), pursuant to which AFS SenSub has
sold, transferred and assigned to the Issuer all of AFS SenSub's right, title
and interest in and to the Receivables;

          WHEREAS, in connection with such sales, transfers and assignments, AFS
and AFS SenSub have made certain representations and warranties regarding the
Receivable Files, upon which the Insurer has relied in issuing the Note Policy;
and

          WHEREAS, the Trust Collateral Agent wishes to appoint the Custodian to
hold the Receivable Files as the custodian on behalf of the Issuer and the Trust
Collateral Agent;

          NOW, THEREFORE, in consideration of the mutual agreements herein
contained and other good and valuable consideration the receipt and adequacy of
which are hereby acknowledged, the parties agree as follows:

          1. Appointment of Custodian; Acknowledgement of Receipt. Subject to
the terms and conditions hereof, the Trust Collateral Agent hereby revocably
appoints the Custodian, but shall not be responsible for the acts or omissions
of the Custodian, and the Custodian hereby accepts such appointment, as
custodian and bailee on behalf of the Issuer and the Trust Collateral Agent, to
maintain exclusive custody of the Receivable Files relating to the Receivables
from time to time pledged to the Trust Collateral Agent as part of the Other
Conveyed Property. In performing its duties hereunder, the Custodian agrees to
act with reasonable care, using that degree of skill and attention that a
commercial bank acting in the capacity of a custodian would exercise with
respect to files relating to comparable automotive or other receivables that it
services or holds for itself or others. The Custodian hereby, as of the Closing
Date, acknowledges receipt of the Receivable File for each Receivable listed in
the Schedule of Receivables attached as Schedule A to the Sale and Servicing
Agreement subject to any exceptions noted on the Custodian's Acknowledgement (as
defined below). As evidence of its acknowledgement of such receipt of such
Receivables, the Custodian shall execute and deliver

<PAGE>

on the Closing Date, the Custodian's Acknowledgement attached hereto as Exhibit
A (the "Custodian's Acknowledgement").

          2. Maintenance of Receivables Files at Office. The Custodian agrees to
maintain the Receivable Files at its office located at 4001 Embarcadero, Suite
200, Arlington, Texas 76014 or, subject to the prior written consent of the
Insurer (so long as no Insurer Default shall have occurred and be continuing),
at such other office as shall from time to time be identified to the Trust
Collateral Agent and the Insurer, and the Custodian will hold the Receivable
Files in such office on behalf of the Issuer and the Trust Collateral Agent,
clearly identified as being separate from any other instruments and files on its
records, including other instruments and files held by the Custodian and in
compliance with Section 3(b) hereof.

          3. Duties of Custodian.

          (a) Safekeeping. The Custodian shall hold the Receivable Files on
behalf of the Trust Collateral Agent clearly identified as being separate from
all other files or records maintained by the Custodian at the same location and
shall maintain such accurate and complete accounts, records and computer systems
pertaining to each Receivable File as will enable the Trust Collateral Agent to
comply with the terms and conditions of the Sale and Servicing Agreement. Each
Receivable representing tangible chattel paper (as such term is defined in the
Uniform Commercial Code) shall be stamped on both of the first page and the
signature page (if different) in accordance with the instructions from time to
time provided by the Insurer, and the form and content of the stamp shall be
acceptable to the Insurer. Each Receivable shall be identified on the books and
records of the Custodian in a manner that (i) is consistent with the practices
of a commercial bank acting in the capacity of custodian with respect to similar
receivables, (ii) indicates that the Receivables are held by the Custodian on
behalf of the Trust Collateral Agent and (iii) is otherwise necessary, as
reasonably determined by the Custodian, to comply with the terms of this
Custodian Agreement. The Custodian shall conduct, or cause to be conducted,
periodic physical inspections of the Receivable Files held by it under this
Custodian Agreement, and of the related accounts, records and computer systems,
in such a manner as shall enable the Trust Collateral Agent, the Insurer and the
Custodian to verify the accuracy of the Custodian's inventory and recordkeeping.
Such inspections shall be conducted at such times, in such manner and by such
persons including, without limitation, independent accountants, as the Insurer
or the Trust Collateral Agent may request and the cost of such inspections shall
be borne directly by the Custodian and not by the Trust Collateral Agent. The
Custodian shall promptly report to the Insurer and the Trust Collateral Agent
any failure on its part to hold the Receivable Files and maintain its accounts,
records and computer systems as herein provided and promptly take appropriate
action to remedy any such failure. Upon request, the Custodian shall make copies
or other electronic file records (e.g., diskettes, CD's, etc.) (the "Copies") of
the Receivable Files and shall deliver such Copies to the Trust Collateral Agent
and the Trust Collateral Agent shall hold such Copies on behalf of the
Noteholders and the Insurer. Subject to Section 3(c) hereof, the Custodian shall
at all times maintain the original of the (i) fully executed original retail
installment sales contract or promissory note (or with respect to "electronic
chattel paper", as such term is defined in the UCC, an authoritative copy) and
(ii) Lien Certificate or application therefore (if no such Lien Certificate has
yet been issued), in each case relating to each Receivable in a fireproof vault;
provided, however, the Lien Certificate may be maintained

                                        2

<PAGE>

electronically by the Registrar of Titles of the applicable state pursuant to
applicable state laws, with confirmation thereof maintained by the Custodian or
a third-party service provider.

          (b) Access to Records. The Custodian shall, subject only to the
Custodian's security requirements applicable to its own employees having access
to similar records held by the Custodian, which requirements shall be consistent
with the practices of a commercial bank acting in the capacity of custodian with
respect to similar files or records, and at such times as may be reasonably
imposed by the Custodian, permit only the Noteholders, the Insurer and the Trust
Collateral Agent or their duly authorized representatives, attorneys or auditors
to inspect the Receivable Files and the related accounts, records, and computer
systems maintained by the Custodian pursuant hereto at such times as the
Noteholders, the Insurer or the Trust Collateral Agent may reasonably request.

          (c) Release of Documents. Consistent with the practices of a
commercial bank acting in the capacity of custodian with respect to similar
files or records, the Custodian may release any Receivable in the Receivable
Files to the Servicer, if appropriate, under the circumstances provided in
Section 3.3(b) of the Sale and Servicing Agreement.

          (d) Administration; Reports. The Custodian shall, in general, attend
to all non-discretionary details in connection with maintaining custody of the
Receivable Files on behalf of the Trust Collateral Agent. In addition, the
Custodian shall assist the Trust Collateral Agent generally in the preparation
of any routine reports to Noteholders or to regulatory bodies, to the extent
necessitated by the Custodian's custody of the Receivable Files.

          (e) Review of Lien Certificates. On or before the Closing Date, the
Custodian shall deliver to the Trust Collateral Agent a listing in the form
attached hereto as Schedule II of Exhibit A, of all Receivables with respect to
which a Lien Certificate, showing AFS (or an Originating Affiliate or a Titled
Third-Party Lender) as secured party, was not included in the related Receivable
File as of such date. In addition, the Custodian shall deliver to the Trust
Collateral Agent and the Insurer an exception report in the form attached as
Schedule II hereto (i) no later than the last Business Day of the calendar month
during which the 90th day after the Closing Date occurred, (ii) no later than
the last Business Day of the calendar month during which the 180th day after the
Closing Date occurred and (iii) no later than the last Business Day of the
calendar month during which the 240th day after the Closing Date occurred.

          4. Instructions; Authority to Act. The Custodian shall be deemed to
have received proper instructions with respect to the Receivable Files upon its
receipt of written instructions signed by a Responsible Officer of the Trust
Collateral Agent. Such instructions may be general or specific in terms. A copy
of any such instructions shall be furnished by the Trust Collateral Agent to the
Trustee, the Issuer and the Insurer.

          5. Custodian Fee. For its services under this Agreement, the Custodian
shall be entitled to reasonable compensation to be paid by the Servicer.

          6. Indemnification by the Custodian. The Custodian agrees to indemnify
the Issuer, the Owner Trustee, the Trust Collateral Agent, the Backup Servicer,
the Insurer and the Trustee for any and all liabilities, obligations, losses,
damage, payments, costs or expenses of

                                        3

<PAGE>

any kind whatsoever (including the fees and expenses of counsel) that may be
imposed on, incurred or asserted against the Issuer, the Owner Trustee, the
Trust Collateral Agent, the Insurer, the Backup Servicer and the Trustee and
their respective officers, directors, employees, agents, attorneys and
successors and assigns as the result of any act or omission in any way relating
to the maintenance and custody by the Custodian of the Receivable Files;
provided, however, that the Custodian shall not be liable for any portion of any
such liabilities, obligations, losses, damages, payments or costs or expenses
due to the willful misfeasance, bad faith or gross negligence of the Issuer, the
Owner Trustee, the Trust Collateral Agent, the Collateral Agent, the Backup
Servicer, the Insurer or the Trustee or the officers, directors, employees and
agents thereof. In no event shall the Custodian be liable to any third party for
acts or omissions of the Custodian.

          7. Advice of Counsel. The Custodian and the Trust Collateral Agent
further agree that the Custodian shall be entitled to rely and act upon advice
of counsel with respect to its performance hereunder as custodian and shall be
without liability for any action reasonably taken pursuant to such advice,
provided that such action is not in violation of applicable Federal or state
law.

          8. Effective Period, Termination, and Amendment; Interpretive and
Additional Provisions. This Custodian Agreement shall become effective as of the
date hereof and shall continue in full force and effect until terminated as
hereinafter provided. Prior to an Insurer Default, this Custodian Agreement may
be amended at any time by mutual agreement of the Insurer, the Trust Collateral
Agent and the Custodian and may be terminated by either the Insurer or the
Custodian by giving written notice to the other parties, such termination to
take effect no sooner than thirty (30) days after the date of such notice;
provided, however, that the Insurer may terminate this Custodian Agreement at
any time in its sole discretion and any termination by the Insurer shall take
effect immediately. So long as AFS is serving as Custodian, any termination of
AFS as Servicer under the Sale and Servicing Agreement shall terminate AFS as
Custodian under this Agreement. If an Insurer Default shall have occurred and be
continuing, with the prior written consent of the Note Majority, this Custodian
Agreement may be amended at any time by mutual agreement of the parties hereto
and may be terminated by any party by giving written notice to the other
parties, such termination to take effect no sooner than thirty (30) days after
the date of such notice; provided, however, that if an Insurer Default has
occurred and is continuing such action shall not materially adversely affect the
interest of the Insurer. Upon any termination or amendment of this Custodian
Agreement, the Trust Collateral Agent, in the case of amendments, and the party
seeking termination, in the case of terminations, shall give written notice to
the Insurer, Standard & Poor's, a division of the McGraw-Hill Companies, Inc.
("Standard & Poor's"), Moody's Investors Service ("Moody's") and Fitch Inc.
("Fitch") (collectively, the "Rating Agencies"). Immediately after receipt of
notice of termination of this Custodian Agreement, the Custodian shall deliver
the Receivable Files to the Trust Collateral Agent on behalf of the Noteholders
and the Insurer, and at the Custodian's expense, at such place or places as the
Trust Collateral Agent, or the Insurer in the case of a termination by the
Insurer, may designate, and the Trust Collateral Agent, or its agent, as the
case may be, shall act as custodian for such Receivables Files on behalf of the
Noteholders and the Insurer until such time as a successor custodian, approved
by the Insurer, has been appointed. If, within seventy-two (72) hours after the
termination of this Custodian Agreement, the Custodian has not delivered the
Receivable Files in accordance with the preceding sentence, the Insurer or, if
an Insurer Default

                                        4

<PAGE>

shall have occurred and be continuing, the Trust Collateral Agent, may enter the
premises of the Custodian and remove the Receivable Files from such premises. In
connection with the administration of this Agreement, the parties may agree from
time to time upon the interpretation of the provisions of this Agreement as may
in their joint opinion be consistent with the general tenor and purposes of this
Agreement, any such interpretation to be signed by all parties and annexed
hereto.

          9. Governing Law. This Custodian Agreement shall be governed by and
construed in accordance with the laws of the State of New York without regard to
the conflict of law provisions thereof (other than Sections 5-1401 and 5-1402 of
the New York General Obligations Law).

          10. Notices. All demands, notices and communications hereunder shall
be in writing, electronically delivered, delivered or mailed, and shall be
deemed to have been duly given upon receipt (a) in the case of the Custodian, at
the following address: AmeriCredit Financial Services, Inc., 801 Cherry Street,
Suite 3900, Fort Worth, Texas 76102, Attention: Chief Financial Officer, (b) in
the case of the Trust Collateral Agent, at the following address: Wells Fargo
Bank, National Association, Sixth and Marquette Avenue, MAC N9311-161,
Minneapolis, Minnesota 55479 (facsimile number (612) 667-3464), Attention:
Corporate Trust Services/Asset Backed Administration, (c) in the case of the
Insurer, at the following address: XL Capital Assurance Inc., 1221 Avenue of the
Americas, New York, New York 10020 (facsimile number (212) 478-3587), Attention:
Surveillance; e-mail: XLCA.Surveillance@xlgroup.com, (d) in the case of Moody's,
at the following address: 99 Church Street, New York, New York 10007, (e) in the
case of Fitch, at the following address: One State Street Plaza, New York, New
York 10004 and (f) in the case of Standard and Poor's via electronic delivery to
Servicer_reports@sandp.com; for any information not available in electronic
format, hard copies should be sent to the following address: 55 Water Street,
41st floor, New York, New York 10041-0003, Attention: ABS Surveillance Group, or
at such other address as shall be designated by such party in a written notice
to the other parties.

          11. Binding Effect. This Custodian Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns. Concurrently with the appointment of a successor trustee under the
Sale and Servicing Agreement, the parties hereto shall amend this Custodian
Agreement to make said successor trustee, the successor to the Trust Collateral
Agent hereunder.

                  [Remainder of page intentionally left blank]

                                        5

<PAGE>

          IN WITNESS WHEREOF, each of the parties hereto has caused this
Custodian Agreement to be executed in its name and on its behalf by a duly
authorized officer on the day and year first above written.

                                        WELLS FARGO BANK, NATIONAL ASSOCIATION,
                                        as Trust Collateral Agent

                                        By: /s/ Marianna C. Stershic
                                            ------------------------------------
                                        Name: Marianna C. Stershic
                                        Title: Vice President

                                        AMERICREDIT FINANCIAL SERVICES, INC.,
                                        as Custodian

                                        By: /s/ Susan B. Sheffield
                                            ------------------------------------
                                        Name: Susan B. Sheffield
                                        Title: Senior Vice President,
                                               Structured Finance

                                        XL CAPITAL ASSURANCE INC.

                                        By: /s/ Catherine R. Lau
                                            ------------------------------------
                                        Name: Catherine R. Lau
                                        Title: Senior Managing Director

The foregoing Custodian Agreement
is hereby confirmed and accepted
as of the date first above written.

AMERICREDIT AUTOMOBILE RECEIVABLES
TRUST 2007-A-X,
as Issuer

By: WILMINGTON TRUST COMPANY, not in
its individual capacity but solely
as Owner Trustee on behalf of the
Trust,

By: /s/ Michele C. Harra
    ---------------------------------
Name: Michele C. Harra
Title: Financial Services Officer

                              [Custodian Agreement]

<PAGE>

                                                                       EXHIBIT A

                           CUSTODIAN'S ACKNOWLEDGEMENT

          AmeriCredit Financial Services, Inc. (the "Custodian"), acting as
Custodian under a Custodian Agreement, dated as of January 9, 2007, among the
Custodian, Wells Fargo Bank, National Association, as Trust Collateral Agent and
XL Capital Assurance Inc., pursuant to which the Custodian holds on behalf of
the Trust Collateral Agent for the benefit of the Noteholders and the Insurer
certain "Receivable Files," as defined in the Sale and Servicing Agreement,
dated as of January 9, 2007 (the "Sale and Servicing Agreement"), among
AmeriCredit Automobile Receivables Trust 2007-A-X, as Issuer, AFS SenSub Corp.,
as Seller, AmeriCredit Financial Services, Inc., as Servicer, and Wells Fargo
Bank, National Association, as Trust Collateral Agent and as Backup Servicer and
Trust Collateral Agent, hereby acknowledges receipt of the Receivable File for
each Receivable listed in the Schedule of Receivables attached as Schedule A to
said Sale and Servicing Agreement except as noted in the Exception List attached
as Schedule I and the Lien Perfection Exception List attached as Schedule II
hereto.

          IN WITNESS WHEREOF, AmeriCredit Financial Services, Inc. has caused
this acknowledgement to be executed by its duly authorized officer as of this
18th day of January, 2007.

                                        AMERICREDIT FINANCIAL SERVICES, INC.,
                                        as Custodian

                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------

<PAGE>

                                   SCHEDULE I

                            Custodian Exception List

                                        1

<PAGE>

                                   SCHEDULE II

                         Lien Perfection Exception List

                                        2

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