Document:

<PAGE>

                                                                 EXHIBIT 10.19.3

                        COMMITMENT EXTENSION AGREEMENT
                        ------------------------------

     COMMITMENT EXTENSION AGREEMENT (the "Extension Agreement") is made and
                                          -------------------
entered into as of March 29, 2000, among AMERICREDIT WAREHOUSE TRUST, a Delaware
business trust (the "Borrower"), AMERICREDIT FINANCIAL SERVICES, INC., a
                     --------
Delaware corporation, individually ("AFS") and as initial Servicer, and CREDIT
                                     ---
SUISSE FIRST BOSTON, NEW YORK BRANCH ("CSFB"), as agent (the "Agent") for the
                                       ----                   -----
Lenders (as defined in the Agreement referred to below).

                             W I T N E S S E T H :
                             - - - - - - - - - -

     WHEREAS, the Borrower, AFS, individually and as Servicer and Custodian,
AmeriCredit Funding Corp., AmeriCredit Corporation of California, the Lenders,
the Agent and Bank One, N.A., as Backup Servicer and Collateral Agent, are
parties to a certain Receivables Financing Agreement dated as of March 31, 1999
(as amended, the "Agreement"); and
                  ---------

     WHEREAS, the parties hereto desire to extend the Commitment Termination
Date set forth in the Agreement in the manner, and on the terms and conditions
herein provided.

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

     1.  Definitions.  Unless otherwise defined herein, all terms used herein
         -----------
which are defined in the Agreement shall have the meanings assigned thereto in
the Agreement.

     2.  Extension.  As of the Extension Effective Date (as hereinafter
         ---------
defined), the Commitment Termination Date under the Agreement shall be extended
from March 29, 2000 to March 27, 2001.

     3.  Notice.  Promptly after the Extension Effective Date, written notice of
         ------
the extension of the Commitment Termination Date effected hereby shall be
furnished to the Rating Agencies and Bank One, N.A. by the Servicer.

     The modification set forth above is limited precisely as written and shall
not be deemed to (x) be a consent to any waiver of, or modification of, any
other term or condition of the Agreement or any of the documents referred to
therein or (y) prejudice any right or rights which the Agent or any Lender may
now have or may have in the future under or in connection with the Agreement or
any of the documents referred to therein.  Except as expressly modified hereby,
the terms and provisions of this Agreement shall remain in full force and
effect.

     4.  Representations and Warranties.  Each of the parties hereto severally
         ------------------------------
represents and warrants that all acts, filings and conditions required to be
done and performed and to have happened (including, without limitation, the
obtaining of necessary governmental approvals) precedent to the entering into of
this Extension Agreement to constitute this Extension
<PAGE>

Agreement and the Agreement as modified hereby the duly authorized, legal, valid
and binding obligation of such party, enforceable in accordance with its terms,
have been done, performed and have happened in due and strict compliance with
all applicable laws.

     5.  Effectiveness.  This Extension Agreement shall become effective on the
         -------------
date (the "Extension Effective Date") which is the later of March 29, 2000 and
           ------------------------
the date when each of the parties hereto shall have executed a counterpart
hereof and delivered the same to the Agent; provided that the Agent on behalf of
itself and the Lenders may revoke its agreement to this Extension Agreement at
any time prior to March 29, 2000.  Complete sets of counterparts hereof shall be
lodged with the Servicer and the Agent.

     6.  Governing Law.  THIS EXTENSION AGREEMENT SHALL BE GOVERNED BY, AND
         -------------
CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

     7.  Counterparts.  This Extension Agreement may be executed in several
         ------------
counterparts, each of which shall be regarded as the original and all of which
shall constitute one and the same agreement.

                          [Signature Pages to Follow]

                                      -2-
<PAGE>

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

                              AMERICREDIT WAREHOUSE TRUST
                              By: Bankers Trust (Delaware), not in its
                                  individual capacity but solely as Trustee

                              By:_______________________________________________
                                    Name:
                                    Title:

                              AMERICREDIT FINANCIAL SERVICES, INC,
                              as Servicer

                              By:_______________________________________________
                                    Preston A. Miller
                                    Executive Vice President and Treasurer

                              CREDIT SUISSE FIRST BOSTON, NEW
                                    YORK BRANCH, as Agent, on behalf of itself
                                    and the Lenders

                              By:_______________________________________________
                                    Name:
                                    Title:

                              By:_______________________________________________
                                    Name:
                                    Title:

                                      -3-<PAGE>

                                                                   EXHIBIT 10.22

                                                                  EXECUTION COPY

                             AMENDED AND RESTATED
                                 SERVICING AND
                              CUSTODIAN AGREEMENT

                                     among

                     AMERICREDIT FINANCIAL SERVICES, INC.,
                          as Servicer and Custodian,

                          AMERICREDIT BARCLAYS TRUST,
                                  as Debtor,

                                BANK ONE, N.A.
                              as Collateral Agent

                                      and

                              BARCLAYS BANK PLC,
                                   as Agent

                                  dated as of
                                August 31, 2000
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<S>                                                                                                                <C>
ARTICLE I DEFINITIONS..........................................................................................     1

     Section 1.1.   Definitions................................................................................     2
     Section 1.2.   Other Definitional Provisions..............................................................     5

ARTICLE II ADMINISTRATION AND SERVICING OF RECEIVABLES.........................................................     6

     Section 2.1.   Duties of the Servicer.....................................................................     6
     Section 2.2.   Collection of Receivable Payments; Modifications of Receivables; Lock-Box Agreements.......     7
     Section 2.3.   Realization upon Receivables...............................................................     9
     Section 2.4.   Insurance..................................................................................    10
     Section 2.5.   Maintenance of Security Interests in Vehicles..............................................    11
     Section 2.6.   Covenants, Representations, and Warranties of Servicer.....................................    12
     Section 2.7.   Purchase of Receivables Upon Breach of Covenant or Representation and Warranty.............    14
     Section 2.8.   Total Servicing Fee; Payment of Certain Expenses by Servicer...............................    14
     Section 2.9.   Servicer's Certificate.....................................................................    14
     Section 2.10.  Annual Statement as to Compliance, Notice of Servicer Termination Event....................    15
     Section 2.11.  Access to Certain Documentation and Information Regarding Receivables......................    15
     Section 2.12.  Monthly Tape...............................................................................    15
     Section 2.13.  Fidelity Bond and Errors and Omissions Policy..............................................    15

ARTICLE III THE SERVICER.......................................................................................    16

     Section 3.1.   Liability of Servicer; Indemnities.........................................................    16
     Section 3.2.   Merger or Consolidation of, or Assumption of the Obligations of the Servicer...............    17
     Section 3.3.   Limitation on Liability of Servicer and Others.............................................    17
     Section 3.4.   Delegation of Duties.......................................................................    18
     Section 3.5.   Servicer Not to Resign.....................................................................    18
     Section 3.6.   Administrative Duties of Servicer..........................................................    18

ARTICLE IV SERVICER TERMINATION................................................................................    19

     Section 4.1.   Servicer Termination Event.................................................................    19
     Section 4.2.   Consequences of a Servicer Termination Event...............................................    20
     Section 4.3.   Appointment of Successor...................................................................    21
     Section 4.4.   Notification to Secured Parties............................................................    21
     Section 4.5.   Waiver of Past Defaults....................................................................    21

ARTICLE V THE CUSTODIAN........................................................................................    21

     Section 5.1.   Appointment of Custodian; Acknowledgment of Receipt........................................    21
     Section 5.2.   Maintenance of Records at Office...........................................................    22
</TABLE>
<PAGE>

<TABLE>
<S>                                                                                                                <C>
     Section 5.3.   Duties of Custodian........................................................................    22
     Section 5.4.   Instructions; Authority to Act.............................................................    23
     Section 5.5.   Custodian Fee..............................................................................    23
     Section 5.6.   Indemnification by the Custodian...........................................................    24
     Section 5.7.   Advice of Counsel..........................................................................    24
     Section 5.8.   Effective Period, Termination, and Amendment; Interpretive and Additional Provisions.......    24
     Section 5.9.   Representations, Warranties and Covenants of Custodian.....................................    25

ARTICLE VI MISCELLANEOUS.......................................................................................    26

     Section 6.1.   Governing Law..............................................................................    26
     Section 6.2.   Notices....................................................................................    26
     Section 6.3.   Binding Effect.............................................................................    27
     Section 6.4.   Severability...............................................................................    28
     Section 6.5.   Separate Counterparts......................................................................    28
     Section 6.6.   Limitation of Liability of Trustee.........................................................    28
</TABLE>

     EXHIBITS AND SCHEDULES

     Exhibit A - Form of Servicer's Certificate

     Schedule A - Form of Custodian's Acknowledgment

                                      ii
<PAGE>

          THIS AMENDED AND RESTATED SERVICING AND CUSTODIAN AGREEMENT, dated as
of August 31, 2000, is between AmeriCredit Financial Services, Inc.
("AmeriCredit"), as Servicer (in such capacity, the "Servicer") and as Custodian
  -----------                                        --------
(in such capacity, the "Custodian"), AmeriCredit Barclays Trust (the "Trust"),
                        ---------                                     -----
Bank One, N.A. as Collateral Agent (in such capacity, the "Collateral Agent")
                                                           ----------------
and Barclays Bank PLC as Agent (in such capacity, the "Agent").
                                                       -----

                              W I T N E S S E T H
                              - - - - - - - - - -

          WHEREAS, AmeriCredit Barclays Trust (the "Trust"), Barclays Bank PLC,
                                                    -----
as Agent, and Sheffield Receivables Corporation ("Sheffield") have entered into
                                                  ---------
a Note Purchase Agreement, dated as of the date hereof (the "Note Purchase
                                                             -------------
Agreement");
---------

          WHEREAS, the Trust, AmeriCredit, AmeriCredit Funding Corp. III,
Sheffield and the Collateral Agent have entered into a Security Agreement dated
as of the date hereof (the "Security Agreement");
                            ------------------

          WHEREAS, AmeriCredit, AmeriCredit Funding Corp. III, the Collateral
Agent, and the Trust have entered into a Master Receivables Purchase Agreement,
dated as of the date hereof (the "Receivables Purchase Agreement"), pursuant to
                                  ------------------------------
which the Sellers (as defined in the Receivables Purchase Agreement) agree to
sell, transfer and assign to the Trust all of their right, title and interest in
and to the Receivables described in the Schedules of Receivables attached to the
Supplements (as defined below);

          WHEREAS, pursuant to the Receivables Purchase Agreement, the Sellers
and the Trust will enter into Supplements to the Receivables Purchase Agreement
from time to time (each a "Supplement"), whereby the Sellers will sell, transfer
                           ----------
and assign to the Trust on the applicable Receivables Transfer Date (as defined
in the Receivables Purchase Agreement) all of their right, title and interest in
and to Receivables listed on the Schedules of Receivables attached to such
Supplements;

          WHEREAS, pursuant to the Security Agreement, the Trust will pledge to
the Collateral Agent for the benefit of the Secured Parties all of its right,
title and interest in the Collateral, including, but not limited to, the
Receivables and the Other Conveyed Property (as defined in the Receivables
Purchase Agreement);

          WHEREAS, the Servicer is willing to service the Receivables; and

          WHEREAS, the Collateral Agent wishes to appoint the Custodian to hold
the Receivable Files as the custodian on behalf of the Collateral Agent.

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

                                   ARTICLE I

                                  DEFINITIONS
                                  -----------
<PAGE>

          Section 1.1.   Definitions. Whenever used in this Agreement, the
                         -----------
following words and phrases shall have the following meanings:

          "Accounting Date" means, with respect to any Settlement Period the
           ---------------
last day of such Settlement Period.

          "Agreement" means this Agreement, as the same may be amended and
           ---------
supplemented from time to time.

          "AmeriCredit" means AmeriCredit Financial Services, Inc.
           -----------

          "Amount Financed" means, with respect to a Receivable, the aggregate
           ---------------
amount advanced under such Receivable toward the purchase price of the Financed
Vehicle and any related costs, including amounts advanced in respect of
accessories, insurance premiums, service and warranty contracts, other items
customarily financed as part of retail automobile installment sale contracts or
promissory notes, and related costs.

          "Annual Percentage Rate" of a Receivable means the annual percentage
           ----------------------
rate of finance charges or service charges, as stated in the related Contract.

          "Collateral Agent" means Bank One, N.A., in its capacity as Collateral
           ----------------
Agent under the Security Agreement.

          "Collateral Insurance" shall have the meaning set forth in Section
           --------------------
2.4(a).

          "Collection Records" means all manually prepared or computer generated
           ------------------
records relating to collection efforts or payment histories with respect to the
Receivables.

          "Cram Down Loss" means, with respect to a Receivable, if a court of
           --------------
appropriate jurisdiction in a proceeding related to an Insolvency Event shall
have issued an order reducing the amount owed on a Receivable or otherwise
modifying or restructuring the Scheduled Receivables Payments to be made on a
Receivable, an amount equal to (i) the excess of the Outstanding Balance of such
Receivable immediately prior to such order over the Outstanding Balance of such
Receivable as so reduced and/or (ii) if such court shall have issued an order
reducing the effective rate of interest on such Receivable, the excess of the
Outstanding Balance of such Receivable immediately prior to such order over the
net present value (using as the discount rate the higher of the Annual
Percentage Rate on such Receivable or the rate of interest, if any, specified by
the court in such order) of the Scheduled Receivables Payments as so modified or
restructured. A "Cram Down Loss" shall be deemed to have occurred on the date of
issuance of such order.

          "Custodian" means AmeriCredit acting as agent for the Collateral Agent
           ---------
and any successor Custodian selected pursuant to Section 4.3(a) hereof.

          "Custodian's Acknowledgment" means an acknowledgment from the
           --------------------------
Custodian substantially in the form of Schedule A.

          "Dealer" means a dealer who sold a Financed Vehicle and who originated
           ------
and

                                       2
<PAGE>

assigned the respective Receivable to AmeriCredit under a Dealer Agreement or
pursuant to a Dealer Assignment.

          "Dealer Agreement" means any agreement between a Dealer and
           ----------------
AmeriCredit relating to the acquisition of Receivables from a Dealer by
AmeriCredit.

          "Dealer Assignment" means, with respect to a Receivable, the executed
           -----------------
assignment executed by a Dealer conveying such Receivable to AmeriCredit.

          "Dealer Underwriting Guide" means the underwriting manual used by
           -------------------------
AmeriCredit in the purchase of Receivables as amended from time to time.

          "Force-Placed Insurance" has the meaning ascribed thereto in Section
           ----------------------
2.4 hereof.

          "Independent Accountants" means a firm of nationally recognized
           -----------------------
independent certified public accountants.

          "Insolvency Event" means, with respect to a specified Person, (a) the
           ----------------
filing of a petition against such Person or the entry of a decree or order for
relief by a court having jurisdiction in the premises in respect of such Person
or any substantial part of its property in an involuntary case under any
applicable federal or state bankruptcy, insolvency or other similar law now or
hereafter in effect, or appointing a receiver, liquidator, assignee, custodian,
trustee, sequestrator, or similar official for such Person or for any
substantial part of its property, or ordering the winding-up or liquidation of
such Person's affairs, and such petition, decree or order shall remain unstayed
and in effect for a period of 60 consecutive days; or (b) the commencement by
such Person of a voluntary case under any applicable federal or state
bankruptcy, insolvency or other similar law now or hereafter in effect, or the
consent by such Person to the entry of an order for relief in an involuntary
case under any such law, or the consent by such Person to the appointment of or
taking possession by, a receiver, liquidator, assignee, custodian, trustee,
sequestrator, or similar official for such Person or for any substantial part of
its property, or the making by such Person of any general assignment for the
benefit of creditors, or the failure by such Person generally to pay its debts
as such debts become due, or the taking of action by such Person in furtherance
of any of the foregoing.

          "Insurance Add-On Amount" means the premium charged to the Obligor in
           -----------------------
the event that the Servicer obtains Force-Placed Insurance pursuant to Section
2.4.

          "Insurance Policy" means, with respect to a Receivable, any insurance
           ----------------
policy (including the insurance policies described in Section 2.4 hereof)
benefiting the holder of the Receivable providing loss or physical damage,
credit life, credit disability, theft, mechanical breakdown or similar coverage
with respect to the Financed Vehicle or the Obligor.

          "Lien Certificate" means, with respect to a Financed Vehicle, an
           ----------------
original certificate of title, certificate of lien or other notification issued
by the Registrar of Titles of the applicable state to a secured party which
indicates that the lien of the secured party on the Financed Vehicle is recorded
on the original certificate of title. In any jurisdiction in which the original
certificate of title is required to be given to the Obligor, the term "Lien
Certificate" shall mean only a certificate or notification issued to a secured
party.

                                       3
<PAGE>

          "Monthly Records" means all records and data maintained by the
           ---------------
Servicer with respect to the Receivables, including the following with respect
to each Receivable: the account number; the originating Dealer; Obligor name;
Obligor address; Obligor home phone number; Obligor business phone number;
original Outstanding Balance; original term; Annual Percentage Rate; current
Outstanding Balance; current remaining term; origination date; first payment
date; final scheduled payment date; next payment due date; date of most recent
payment; new/used classification; collateral description; days currently
delinquent; number of contract extensions (months) to date; amount of Scheduled
Receivables Payment; current Insurance Policy expiration date; and past due late
charges.

          "Net Liquidation Proceeds" means, with respect to a Defaulted
           ------------------------
Receivable, all amounts realized with respect to such Receivable net of (i)
reasonable expenses incurred by the Servicer in connection with the collection
of such Receivable and the repossession and disposition of the Financed Vehicle
and (ii) amounts that are required to be refunded to the Obligor on such
Receivable; provided, however, that the Liquidation Proceeds with respect to any
            --------  -------
Receivable shall in no event be less than zero.

          "Opinion of Counsel" means a written opinion of counsel reasonably
           ------------------
acceptable to the Agent, which opinion is satisfactory in form and substance to
the Agent.

          "Purchase Amount" means, with respect to a Receivable, the Outstanding
           ---------------
Balance and all accrued and unpaid interest on the Receivable, after giving
effect to the receipt of any moneys collected (from whatever source) on such
Receivable, if any.

          "Purchased Receivable" means a Receivable purchased as of the close of
           --------- ----------
business on the last day of a Settlement Period by AmeriCredit pursuant to
Section 2.7.

          "Rating Agency" means Moody's and Standard & Poor's.
           -------------

          "Receivable Files" means the following documents:
           ----------------

          (i) the fully executed original of the Receivable (together with any
agreements modifying the Receivable, including without limitation any extension
agreements);

          (ii) the original credit application, or a copy thereof, of each
Obligor, fully executed by each such Obligor on AmeriCredit's customary form, or
on a form approved by AmeriCredit, for such application; and

          (iii) the original certificate of title (when received) and otherwise
such documents, if any, that AmeriCredit keeps on file in accordance with its
customary procedures indicating that the Financed Vehicle is owned by the
Obligor and subject to the interest of AmeriCredit as first lienholder or
secured party (including any Lien Certificate received by AmeriCredit), or, if
such original certificate of title has not yet been received, a copy of the
application therefor, showing AmeriCredit as secured party.

          "Registrar of Titles" means, with respect to any state, the
           -------------------
governmental agency or body responsible for the registration of, and the
issuance of certificates of title relating to, motor vehicles and liens thereon.

                                       4
<PAGE>

          "Responsible Officer" means any officer in the corporate trust office
           -------------------
of the Trustee or any agent of the Trustee under a power of attorney with direct
responsibility for the administration of this Agreement or any of the other
Transaction Documents on behalf of the Trustee.

          "Scheduled Receivables Payment" means, with respect to any Settlement
           -----------------------------
Period for any Receivable, the amount set forth in such Receivable as required
to be paid by the Obligor in such Settlement Period. If after the Closing Date,
the Obligor's obligation under a Receivable with respect to a Settlement Period
has been modified so as to differ from the amount specified in such Receivable
as a result of (i) the order of a court in an insolvency proceeding involving
the Obligor, (ii) pursuant to the Soldiers' and Sailors' Civil Relief Act of
1940 or (iii) modifications or extensions of the Receivable permitted by Section
2.2(b), the Scheduled Receivables Payment with respect to such Settlement Period
shall refer to the Obligor's payment obligation with respect to such Settlement
Period as so modified.

          "Servicer" means AmeriCredit Financial Services, Inc., as the servicer
           --------
of the Receivables, and each successor Servicer pursuant to Section 4.3.

          "Servicer Termination Event" means an event specified in Section 4.1.
           --------------------------

          "Servicer's Certificate" means an Officers' Certificate of the
           ----------------------
Servicer delivered pursuant to Section 2.9, substantially in the form of Exhibit
A.

          Section 1.2.   Other Definitional Provisions.
                         -----------------------------

          (a)  Capitalized terms used herein and not otherwise defined herein
have meanings assigned to them in the Security Agreement or the Note Purchase
Agreement.

          (b)  All terms defined in this Agreement shall have the defined
meanings when used in any instrument governed hereby and in any certificate or
other document made or delivered pursuant hereto unless otherwise defined
therein.

          (c)  As used in this Agreement, in any instrument governed hereby and
in any certificate or other document made or delivered pursuant hereto or
thereto, accounting terms not defined in this Agreement or in any such
instrument, certificate or other document, and accounting terms partly defined
in this Agreement or in any such instrument, certificate or other document to
the extent not defined, shall have the respective meanings given to them under
generally accepted accounting principles as in effect on the date of this
Agreement or any such instrument, certificate or other document, as applicable.
To the extent that the definitions of accounting terms in this Agreement or in
any such instrument, certificate or other document are inconsistent with the
meanings of such terms under generally accepted accounting principles, the
definitions contained in this Agreement or in any such instrument, certificate
or other document shall control.

          (d)  The words "hereof," "herein," "hereunder" and words of similar
import when used in this Agreement shall refer to this Agreement as a whole and
not to any particular provision of this Agreement; Section, Schedule and Exhibit
references contained in this Agreement are references to Sections, Schedules and
Exhibits in or to this Agreement unless

                                       5
<PAGE>

otherwise specified; and the term "including" shall mean "including without
limitation."

          (e)  The definitions contained in this Agreement are applicable to the
singular as well as the plural forms of such terms and to the masculine as well
as to the feminine and neuter genders of such terms.

          (f)  Any agreement, instrument or statute defined or referred to
herein or in any instrument or certificate delivered in connection herewith
means such agreement, instrument or statute as from time to time amended,
modified or supplemented and includes (in the case of agreements or instruments)
references to all attachments thereto and instruments incorporated therein;
references to a Person are also to its permitted successors and assigns.

                                  ARTICLE II

                  ADMINISTRATION AND SERVICING OF RECEIVABLES
                  -------------------------------------------

          Section 2.1.   Duties of the Servicer. (a) The Servicer is hereby
                         ----------------------
authorized to act as agent for the Trust and in such capacity shall manage,
service, administer and make collections on the Receivables, and perform the
other actions required by the Servicer under this Agreement. The Servicer agrees
that its servicing of the Receivables shall be carried out in accordance with
customary and usual procedures of institutions which service motor vehicle
retail installment sales contracts and, to the extent more exacting, the degree
of skill and attention that the Servicer exercises from time to time with
respect to all comparable motor vehicle receivables that it services for itself
or others. The Servicer's duties shall include, without limitation, collection
and posting of all payments, responding to inquiries of Obligors on the
Receivables, investigating delinquencies, sending payment coupons to Obligors,
reporting any required tax information to Obligors, monitoring the collateral,
complying with the terms of the Lock-Box Agreement, accounting for collections
and furnishing monthly and annual statements to the Collateral Agent with
respect to distributions, monitoring the status of Insurance Policies with
respect to the Financed Vehicles and performing the other duties specified
herein.

          (b)  The Servicer shall also administer and enforce all rights and
responsibilities of the holder of the Receivables provided for in the Dealer
Agreements (and shall maintain possession of the Dealer Agreements, to the
extent it is necessary to do so), the Dealer Assignments and the Insurance
Policies, to the extent that such Dealer Agreements, Dealer Assignments and
Insurance Policies relate to the Receivables, the Financed Vehicles or the
Obligors. The Servicer shall follow its customary standards, policies, and
procedures and shall have full power and authority, acting alone, to do any and
all things in connection with such managing, servicing, administration and
collection that it may deem necessary or desirable. Without limiting the
generality of the foregoing, the Servicer is hereby authorized and empowered by
the Trust to execute and deliver, on behalf of the Trust, any and all
instruments of satisfaction or cancellation, or of partial or full release or
discharge, and all other comparable instruments, with respect to the Receivables
and with respect to the Financed Vehicles; provided, however, that
notwithstanding the foregoing, the Servicer shall not, except pursuant to an
order from a court of competent jurisdiction, release an Obligor from payment of
any unpaid amount under any Receivable or waive the right to collect the unpaid
balance of any Receivable from the

                                       6
<PAGE>

Obligor.

          (c)  The Servicer is hereby authorized to commence, in it's own name
or in the name of the Trust, a legal proceeding to enforce a Receivable pursuant
to Section 2.3 or to commence or participate in any other legal proceeding
(including, without limitation, a bankruptcy proceeding) relating to or
involving a Receivable, an Obligor or a Financed Vehicle. If the Servicer
commences or participates in such a legal proceeding in its own name, the Trust
shall thereupon be deemed to have automatically assigned such Receivable to the
Servicer solely for purposes of commencing or participating in any such
proceeding as a party or claimant, and the Servicer is authorized and empowered
by the Trust to execute and deliver in the Servicer's name any notices, demands,
claims, complaints, responses, affidavits or other documents or instruments in
connection with any such proceeding. The Collateral Agent shall, in its
reasonable discretion, furnish the Servicer with any limited powers of attorney
and other documents which the Servicer may reasonably request and which the
Servicer deems necessary or appropriate and take any other steps which the
Servicer may deem necessary or appropriate to enable the Servicer to carry out
its servicing and administrative duties under this Agreement.

          Section 2.2.      Collection of Receivable Payments; Modifications of
                            ---------------------------------------------------
Receivables; Lock-Box Agreements.
--------------------------------

          (a)  Consistent with the standards, policies and procedures required
by this Agreement and the Credit and Collection Policy, the Servicer shall make
reasonable efforts to collect all payments called for under the terms and
provisions of the Receivables as and when the same shall become due, and shall
follow such collection procedures as it follows with respect to all comparable
automobile receivables that it services for itself or others and otherwise act
with respect to the Receivables, the Dealer Agreements, the Dealer Assignments,
the Insurance Policies and the Other Conveyed Property in such manner as will,
in the reasonable judgment of the Servicer, maximize the amount to be received
by the Trust with respect thereto. The Servicer is authorized in its discretion
to waive any prepayment charge, late payment charge or any other similar fees
that may be collected in the ordinary course of servicing any Receivable.

          (b)  So long as no Servicer Termination Event shall have occurred and
be continuing, and in accordance with the Credit and Collection Policy, the
Servicer may at any time agree to a modification or amendment of a Receivable in
order to (i) change the Obligor's regular due date to a date within the
Settlement Period in which such due date occurs or (ii) re-amortize the
Scheduled Receivables Payments on the Receivable following a partial prepayment
of principal, in accordance with its customary procedures if the Servicer
believes in good faith that such extension, modification or amendment is
necessary to avoid a default on such Receivable, will maximize Collections with
respect to such Receivable, and is otherwise in the best interests of the Trust.

          (c)  So long as no Servicer Termination Event shall have occurred and
be continuing, and in accordance with the Credit and Collection Policy, the
Servicer may grant payment extensions on, or other modifications or amendments
to, a Receivable (in addition to those modifications permitted by Section
2.2(b)) in accordance with its customary procedures if the Servicer believes in
good faith that such extension, modification or amendment is necessary to avoid
a default on such Receivable, will maximize Collections with respect to such

                                       7
<PAGE>

Receivable, and is otherwise in the best interests of the Trust;

provided, that any such amendment,  modification or extension shall be delivered
--------  ----
by the Servicer to the Custodian promptly after execution thereof.

          The Servicer shall use its best efforts to notify or direct Obligors
to make all payments on the Receivables, whether by check or by direct debit of
the Obligor's bank account, to be made directly to one or more Lock-Box Banks,
acting as agent for the Collateral Agent, on behalf of the Secured Parties
pursuant to a Lock-Box Agreement. The Servicer shall use its best efforts to
notify or direct any Lock-Box Bank to deposit all payments on the Receivables in
the Lock-Box Account no later than the Business Day after receipt, and to cause
all amounts credited to the Lock-Box Account on account of such payments to be
transferred to the Collection Account no later than the second Business Day
after receipt of such payments. The Lock-Box Account shall be a demand deposit
account held by the Lock-Box Bank, or at the request of the Agent, an Eligible
Deposit Account.

          Notwithstanding any Lock-Box Agreement, or any of the provisions of
this Agreement relating to the Lock-Box Agreement, the Servicer shall remain
obligated and liable to the Trust, the Collateral Agent and Secured Parties for
servicing and administering the Receivables and the Other Conveyed Property in
accordance with the provisions of this Agreement without diminution of such
obligation or liability by virtue thereof.

          In the event of a termination of the Servicer, the successor Servicer
shall assume all of the rights and obligations of the outgoing Servicer under
the Lock-Box Agreement subject to the terms hereof. In such event, the successor
Servicer shall be deemed to have assumed all of the outgoing Servicer's interest
therein and to have replaced the outgoing Servicer as a party to each such Lock-
Box Agreement to the same extent as if such Lock-Box Agreement had been assigned
to the successor Servicer, except that the outgoing Servicer shall not thereby
be relieved of any liability or obligations on the part of the outgoing Servicer
to the Lock-Box Bank under such Lock-Box Agreement. The outgoing Servicer shall,
upon request of the Collateral Agent, but at the expense of the outgoing
Servicer, deliver to the successor Servicer all documents and records relating
to each such Lock-Box Agreement and an accounting of amounts collected and held
by the Lock-Box Bank and otherwise use its best efforts to effect the orderly
and efficient transfer of any Lock-Box Agreement to the successor Servicer. In
the event that the Agent elects to change the identity of the Lock-Box Bank, the
outgoing Servicer, at its expense, shall cause the Lock-Box Bank to deliver, at
the direction of the Agent to the Collateral Agent or a successor Lock-Box Bank,
all documents and records relating to the Receivables and all amounts held (or
thereafter received) by the Lock-Box Bank (together with an accounting of such
amounts) and shall otherwise use its best efforts to effect the orderly and
efficient transfer of the Lock-Box arrangements and the Servicer shall notify
the Obligors to make payments to the Lock-Box established by the successor.

          (d)  The Servicer shall remit all payments by or on behalf of the
Obligors received directly by the Servicer to the Lock-Box Bank for deposit into
the Collection Account, in either case, without deposit into any intervening
account and as soon as practicable, but in no event later than the Business Day
after receipt thereof.

                                       8
<PAGE>

          Section 2.3.    Realization upon Receivables.
                          ----------------------------

          (a)   Consistent with the standards, policies and procedures required
by this Agreement and the Credit and Collection Policy, the Servicer shall use
its best efforts to repossess (or otherwise comparably convert the ownership of)
and liquidate any Financed Vehicle securing a Receivable with respect to which
the Servicer has determined that payments thereunder are not likely to be
resumed, as soon as is practicable after default on such Receivable but in no
event later than the date on which all or any portion of a Scheduled Receivables
Payment has become 91 days delinquent; provided, however, that the Servicer may
                                       --------  -------
elect not to repossess a Financed Vehicle within such time period if in its good
faith judgment it determines that the proceeds ultimately recoverable with
respect to such Receivable would be increased by forbearance. The Servicer is
authorized to follow such customary practices and procedures as it shall deem
necessary or advisable, consistent with the standard of care required by Section
2.1, which practices and procedures may include reasonable efforts to realize
upon any recourse to Dealers, the sale of the related Financed Vehicle at public
or private sale, the submission of claims under an Insurance Policy and other
actions by the Servicer in order to realize upon such a Receivable. The
foregoing is subject to the provision that, in any case in which the Financed
Vehicle shall have suffered damage, the Servicer shall not expend funds in
connection with any repair or towards the repossession of such Financed Vehicle
unless it shall determine in its reasonable discretion that such repair and/or
repossession shall increase the proceeds of liquidation of the related
Receivable by an amount greater than the amount of such expenses. All amounts
received upon liquidation of a Financed Vehicle shall be remitted directly by
the Servicer to the Collection Account without deposit into any intervening
account as soon as practicable, but in no event later than the Business Day
after receipt thereof. The Servicer shall be entitled to recover all reasonable
expenses incurred by it in the course of repossessing and liquidating a Financed
Vehicle into cash proceeds, but only out of the cash proceeds of such Financed
Vehicle, any deficiency obtained from the Obligor with respect to such Financed
Vehicle or any amounts received from the related Dealer with respect to such
Financed Vehicle, which amounts in reimbursement may be retained by the Servicer
to the extent of such expenses. The Servicer shall pay on behalf of the Trust
any personal property taxes assessed on repossessed Financed Vehicles.

          (b)  If the Servicer elects to commence a legal proceeding to enforce
a Dealer Agreement or Dealer Assignment, the act of commencement shall be deemed
to be an automatic assignment from the Trust to the Servicer of the rights under
such Dealer Agreement and Dealer Assignment for purposes of collection only. If,
however, in any enforcement suit or legal proceeding it is held that the
Servicer may not enforce a Dealer Agreement or Dealer Assignment on the grounds
that it is not a real party in interest or a Person entitled to enforce the
Dealer Agreement or Dealer Assignment, the Sellers, at the Sellers' expense,
shall take such steps as the Servicer deems reasonably necessary to enforce the
Dealer Agreement or Dealer Assignment, including bringing suit in its name or
the name of the Sellers or of the Trust. All amounts recovered in any legal
proceeding shall be remitted directly by the Servicer to the Lock-Box Bank as
provided in Section 2.2(d). Notwithstanding anything to the contrary contained
herein, (i) the Agent may, in its reasonable discretion, direct the Servicer
(whether the Servicer is AmeriCredit or any other Person) to commence or settle
any legal action to enforce collection of any Receivable or to foreclose upon or
repossess any Related Security and (ii) the Servicer shall not make the Agent,
the Collateral Agent, the Company or any of the Bank Investors a party to

                                       9
<PAGE>

any litigation without the prior written consent of such Person; provided,
however, that in the case of subsection (i) of this sentence, the Servicer may
decline or refuse to act on instructions provided by the Agent if, in the
reasonable determination of the Servicer, such action is not consistent with any
Requirements of Law (as defined in the Note Purchase Agreement) or the Credit
and Collection Policy (as defined in the Security Agreement), or could result in
legal or regulatory action against the Servicer.

          Section 2.4.   Insurance.
                         ---------

          (a)  The Servicer shall require, in accordance with its customary
servicing policies and procedures, that each Financed Vehicle be insured by the
related Obligor under the Insurance Policies and shall monitor the status of
such physical loss and damage insurance coverage thereafter, in accordance with
its customary servicing procedures. Each Receivable requires the Obligor to
maintain such physical loss and damage insurance, naming AmeriCredit and its
successors and assigns as additional insureds, and permits the holder of such
Receivable to obtain physical loss and damage insurance at the expense of the
Obligor if the Obligor fails to maintain such insurance. If the Servicer shall
determine that an Obligor has failed to obtain or maintain a physical loss and
damage Insurance Policy covering the related Financed Vehicle (including,
without limitation, during the repossession of such Financed Vehicle) the
Servicer may enforce the rights of the holder of the Receivable under the
Receivable to require the Obligor to obtain such physical loss and damage
insurance in accordance with its customary servicing policies and procedures.
The Servicer may maintain a vendor's single interest or other collateral
protection insurance policy with respect to all Financed Vehicles ("Collateral
                                                                    ----------
Insurance") which policy shall by its terms insure against physical loss and
---------
damage in the event any Obligor fails to maintain physical loss and damage
insurance with respect to the related Financed Vehicle. All policies of
Collateral Insurance shall be endorsed with clauses providing for loss payable
to the Servicer. Costs incurred by the Servicer in maintaining such Collateral
Insurance shall be paid by the Servicer.

          (b)  The Servicer may, if an Obligor fails to obtain or maintain a
physical loss and damage Insurance Policy, obtain insurance with respect to the
related Financed Vehicle and advance on behalf of such Obligor, as required
under the terms of the insurance policy, the premiums for such insurance (such
insurance being referred to herein as "Force-Placed Insurance"). All policies of
                                       ----------------------
Force-Placed Insurance shall be endorsed with clauses providing for loss payable
to the Servicer. Any cost incurred by the Servicer in maintaining such Force-
Placed Insurance shall only be recoverable out of premiums paid by the Obligors
or Net Liquidation Proceeds with respect to the Receivable, as provided in
Section 2.4(c).

          (c)  In connection with any Force-Placed Insurance obtained hereunder,
the Servicer may, in the manner and to the extent permitted by applicable law,
require the Obligors to repay the entire premium to the Servicer. In no event
shall the Servicer include the amount of the premium in the Amount Financed
under the Receivable. For all purposes of this Agreement, the Insurance Add-On
Amount with respect to any Receivable having Force-Placed Insurance will be
treated as a separate obligation of the Obligor and will not be added to the
Outstanding Balance of such Receivable, and amounts allocable thereto will not
be available for distribution on the Note. The Servicer shall retain and
separately administer the right to receive payments from Obligors with respect
to Insurance Add-On Amounts or rebates of Forced-Placed Insurance

                                       10
<PAGE>

premiums. If an Obligor makes a payment with respect to a Receivable having
Force-Placed Insurance, but the Servicer is unable to determine whether the
payment is allocable to the Receivable or to the Insurance Add-On Amount, the
payment shall be applied first to any unpaid Scheduled Receivables Payments and
then to the Insurance Add-On Amount. Net Liquidation Proceeds on any Receivable
will be used first to pay the Outstanding Balance and accrued interest on such
Receivable (until reduced to zero) and then to pay the related Insurance Add-On
Amount. If an Obligor under a Receivable with respect to which the Servicer has
placed Force-Placed Insurance fails to make scheduled payments of such Insurance
Add-On Amount as due, and the Servicer has determined that eventual payment of
the Insurance Add-On Amount is unlikely, the Servicer may, but shall not be
required to, purchase such Receivable from the Trust for the Purchase Amount on
any subsequent Determination Date. Any such Receivable, and any Receivable with
respect to which the Servicer has placed Force-Placed Insurance which has been
paid in full (excluding any Insurance Add-On Amounts) will be assigned to the
Servicer.

          (d)  The Servicer may sue to enforce or collect upon the Insurance
Policies, in its own name, if possible, or as agent of the Trust. If the
Servicer elects to commence a legal proceeding to enforce an Insurance Policy,
the act of commencement shall be deemed to be an automatic assignment of the
rights of the Trust under such Insurance Policy to the Servicer for purposes of
collection only. If, however, in any enforcement suit or legal proceeding it is
held that the Servicer may not enforce an Insurance Policy on the grounds that
it is not a real party in interest or a holder entitled to enforce the Insurance
Policy, the Sellers, at the Sellers' expense, shall take such steps as the
Servicer deems necessary to enforce such Insurance Policy, including bringing
suit in its name or the name of the Trust.

          (e)  The Servicer will cause itself and may cause the Collateral Agent
to be named as named insured under all policies of Collateral Insurance.

          Section 2.5.   Maintenance of Security Interests in Vehicles.
                         ---------------------------------------------

          (a)  Consistent with the policies and procedures required by this
Agreement, the Servicer shall take such steps on behalf of the Trust as are
necessary to maintain perfection of the security interest created by each
Contract in the related Financed Vehicle with respect to each Receivable,
including, but not limited to, obtaining the execution by the Obligors and the
recording, registering, filing, re-recording, re-filing, and re-registering of
all security agreements, financing statements and continuation statements as are
necessary to maintain the security interest granted by the Obligors under the
respective Contracts. The Servicer shall take all action required under Section
2.1 and 2.6 of the Security Agreement with respect to the notation of Contracts
and the marking of records of the Trust. The Collateral Agent hereby authorizes
the Servicer, and the Servicer agrees, to take any and all steps necessary to
re-perfect such security interest on behalf of the Trust as necessary because of
the relocation of a Financed Vehicle or for any other reason. In the event that
the assignment of a Receivable to the Trust is insufficient, without a notation
on the related Financed Vehicle's certificate of title, or without fulfilling
any additional administrative requirements under the laws of the state in which
the Financed Vehicle is located, to perfect a security interest in the related
Financed Vehicle in favor of the Trust, the Servicer hereby agrees that
AmeriCredit's designation as the secured party on the certificate of title is in
its capacity as Servicer as agent of the Trust.

                                       11
<PAGE>

          (b)  Upon the occurrence of a Termination Event, the Agent may
instruct the Collateral Agent and the Servicer to take or cause to be taken such
action as may, in the opinion of counsel to the Agent, be necessary to perfect
or re-perfect the security interests in the Financed Vehicles securing the
Receivables in the name of the Trust by amending the title documents of such
Financed Vehicles or by such other reasonable means as may, in the opinion of
counsel to the Agent, be necessary or prudent.

          Section 2.6.   Covenants, Representations, and Warranties of Servicer.
                         ------------------------------------------------------

          (a)  The Servicer covenants as follows:

          (i)    Liens in Force. The Financed Vehicle securing each Receivable
                 --------------
     shall not be released in whole or in part from the security interest
     granted by the related Contract, except upon payment in full of the
     Receivable or as otherwise contemplated herein;

          (ii)   No Impairment.  The Servicer shall do nothing to impair the
                 -------------
     rights of the Trust or the Secured Parties in the Receivables, the Dealer
     Agreements, the Dealer Assignments, the Insurance Policies or the Other
     Conveyed Property except as otherwise expressly provided herein;

          (iii)  No Amendments.  The Servicer shall not extend or otherwise
                 -------------
     amend the terms of any Receivable, except in accordance with Section 2.2;
     and

          (iv)   Restrictions on Liens.  The Servicer shall not (i) create,
                 ---------------------
     incur or suffer to exist, or agree to create, incur or suffer to exist, or
     consent to cause or permit in the future (upon the happening of a
     contingency or otherwise) the creation, incurrence or existence of any Lien
     or restriction on transferability of the Receivables except for the Lien in
     favor of the Collateral Agent for the benefit of the Secured Parties and
     the restrictions on transferability imposed by this Agreement or (ii) sign
     or file under the Uniform Commercial Code of any jurisdiction any financing
     statement which names AmeriCredit or the Servicer as a debtor, or sign any
     security agreement authorizing any secured party thereunder to file such
     financing statement, with respect to the Receivables, except in each case
     any such instrument solely securing the rights and preserving the Lien of
     the Collateral Agent, for the benefit of the Secured Parties.

          (b)  The Servicer represents and warrants as follows:

          (i)    Representations and Warranties.  Each Receivable is an
                 ------------------------------
     Eligible Receivable;

          (ii)   Organization and Good Standing.  The Servicer has been duly
                 ------------------------------
     organized and is validly existing and in good standing under the laws of
     its jurisdiction of organization, with power, authority and legal right to
     own its properties and to conduct its business as such properties are
     currently owned and such business is currently conducted, and had at all
     relevant times, and now has, all power, authority and legal right required
     to enter into and perform its obligations under this Agreement and each of
     the other Transaction Documents to which it is a party;

                                       12
<PAGE>

          (iii)   Due Qualification.  The Servicer is duly qualified to do
                  -----------------
     business as a foreign corporation, is 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 (including
     the servicing of the Receivables as required by this Agreement) requires or
     shall require such qualification;

          (iv)    Power and Authority.  The Servicer has the full power and
                  -------------------
     authority to execute and deliver this Agreement and the other Transaction
     Documents to which it is a party and to carry out its terms and their
     terms, respectively, and the execution, delivery and performance of this
     Agreement and the other Transaction Documents to which it is a party have
     been duly authorized by the Servicer by all necessary corporate action;

          (v)     Binding Obligation.  This Agreement and the other Transaction
                  ------------------
     Documents to which the Servicer is a party shall constitute legal, valid
     and binding obligations of the Servicer enforceable in accordance with
     their respective terms, except as enforceability may be limited by
     bankruptcy, insolvency, reorganization, or other similar laws affecting the
     enforcement of creditors' rights generally and by equitable limitations on
     the availability of specific remedies, regardless of whether such
     enforceability is considered in a proceeding in equity or at law;

          (vi)    No Violation.  The consummation of the transactions
                  ------------
     contemplated by this Agreement and the other Transaction Documents to which
     the Servicer is a party, and the fulfillment of the terms of this Agreement
     and the Transaction Documents to which the Servicer is a party, shall 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 articles of incorporation or bylaws of the Servicer, or any indenture,
     agreement, mortgage, deed of trust or other instrument to which the
     Servicer 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, mortgage, deed of trust or other instrument,
     other than this Agreement, or violate any law, order, rule or regulation
     applicable to the Servicer of any court or of any federal or state
     regulatory body, administrative agency or other governmental
     instrumentality having jurisdiction over the Servicer or any of its
     properties and do not require any action by or require the consent of or
     the filing of any notice with any Official Body or other Person;

          (vii)   No Proceedings.  There are no proceedings or investigations
                  --------------
     pending or, to the Servicer's knowledge, threatened against the Servicer,
     before any court, regulatory body, administrative agency or other tribunal
     or governmental instrumentality having jurisdiction over the Servicer or
     its properties (A) asserting the invalidity of this Agreement or any of the
     Transaction Documents, (B) seeking to prevent the consummation of any of
     the transactions contemplated by this Agreement or any of the Transaction
     Documents, or (C) seeking any determination or ruling that might materially
     and adversely affect the performance by the Servicer of its obligations
     under, or the validity or enforceability of, this Agreement or any of the
     Transaction Documents or (D) that could have a Material Adverse Effect on
     the Receivables; and

          (viii)  No Consents.  The Servicer is not required to obtain the
                  -----------
     consent of any

                                       13
<PAGE>

     other party or any consent, license, approval or authorization, or
     registration or declaration with, any governmental authority, bureau or
     agency in connection with the execution, delivery, performance, validity or
     enforceability of this Agreement which has not already been obtained.

          Section 2.7.  Purchase of Receivables Upon Breach of Covenant or
                        --------------------------------------------------
Representation and Warranty.  Upon discovery by either of the Servicer or a
---------------------------
Responsible Officer of the Agent of a breach of any of the covenants set forth
in Sections 2.5(a), 2.6(a), 5.1, 5.2, 5.3 or 5.9, the party discovering such
breach shall give prompt written notice to all of the parties hereto; provided,
                                                                      --------
however, that the failure to give any such notice shall not affect any
-------
obligation of AmeriCredit as Servicer under this Section. As of the second
Accounting Date following its discovery or receipt of notice of any breach of
any covenant set forth in Sections 2.5(a), 2.6(a), 5.1, 5.2, 5.3 or 5.9 which
materially and adversely affects the interests of the Secured Parties in any
Receivable (including any Defaulted Receivable) (or, at AmeriCredit's election,
the first Accounting Date so following) or the related Financed Vehicle,
AmeriCredit shall, unless such breach shall have been cured in all material
respects by the last day of the second Settlement Period after such breach,
purchase from the Trust the Receivable affected by such breach and, on the
related Determination Date, AmeriCredit shall pay the related Purchase Amount to
the Trust. It is understood and agreed that the obligation of AmeriCredit to
purchase any Receivable (including any Defaulted Receivable) with respect to
which such a breach has occurred and is continuing shall, if such obligation is
fulfilled, constitute the sole remedy against AmeriCredit for such breach
available to the Secured Parties or the Collateral Agent; provided, however,
                                                          --------  -------
that AmeriCredit shall indemnify the Trust, the Collateral Agent and the Secured
Parties from and against all costs, expenses, losses, damages, claims and
liabilities, including reasonable fees and expenses of counsel, which may be
asserted against or incurred by any of them as a result of third party claims
arising out of the events or facts giving rise to such breach.

          Section 2.8.  Total Servicing Fee;  Payment of Certain Expenses by
                        ----------------------------------------------------
Servicer.  On each Remittance Date, the Servicer shall to the extent provided in
--------
Section 2.3(a) of the Security Agreement be entitled to receive out of the
Collection Account the Servicing Fee for the related Settlement Period. The
Servicer shall be required to pay all expenses incurred by it in connection with
its activities under this Agreement (including taxes imposed on the Servicer,
expenses incurred in connection with distributions and reports made by the
Servicer to Secured Parties and all other fees and expenses of the Collateral
Agent (to the extent such fees and expenses are not paid pursuant to Section
2.3(a) of the Security Agreement), except taxes levied or assessed against the
Trust, and claims against the Trust in respect of indemnification, which taxes
and claims in respect of indemnification against the Trust are expressly stated
to be for the account of AmeriCredit). The Servicer shall be liable for the fees
and expenses of the Custodian, the Collateral Agent, the Agent, the Lock-Box
Bank (and any fees under the Lock-Box Agreement) and the Independent
Accountants.

          Section 2.9.  Servicer's  Certificate.  No later than 5 p.m. Eastern
                        -----------------------
time on each Determination Date, the Servicer shall deliver (facsimile delivery
being acceptable) to the Trust, the Agent and the Collateral Agent a Servicer's
Certificate executed by a Responsible Officer of the Servicer in the form
attached hereto as Exhibit A. Receivables purchased by the Servicer or by the
Sellers on the related Accounting Date and each Receivable which became a
Defaulted Receivable or which was paid in full during the related Settlement
Period shall be identified by

                                       14
<PAGE>

account number (as set forth in the Schedule of Receivables). In addition to the
information set forth in the preceding sentence, the Servicer's Certificate
shall also state whether to the knowledge of the Servicer a Termination Event or
Potential Termination Event has occurred.

          Section 2.10.  Annual Statement as to Compliance, Notice of Servicer
                         -----------------------------------------------------
Termination Event.
-----------------

          (a)  The Servicer shall deliver to the Agent, the Trust, and the
Collateral Agent, on or before September 30 (or 90 days after the end of the
Servicer's fiscal year, if other than June 30) of each year, beginning on
September 30, 2001, an officer's certificate signed by any Responsible Officer
of the Servicer, dated as of June 30 (or other applicable date) of such year,
stating that (i) a review of the activities of the Servicer during the preceding
12-month period (or such other period as shall have elapsed from the Closing
Date to the date of the first such certificate) and of its performance under
this Agreement has been made under such officer's supervision, and (ii) to such
officer's knowledge, based on such review, the Servicer has fulfilled all its
obligations under this Agreement throughout such period, or, if there has been a
default in the fulfillment of any such obligation, specifying each such default
known to such officer and the nature and status thereof.

          (b)  The Servicer shall deliver to the Trust, the Agent and the
Collateral Agent, promptly after having obtained knowledge thereof, but in no
event later than two (2) Business Days thereafter, written notice in an
officer's certificate of any event which with the giving of notice or lapse of
time, or both, would become a Servicer Termination Event under Section 4.1(a).
The Servicer shall, and shall cause the Sellers to, deliver to the Agent, the
Collateral Agent and the Servicer promptly after having obtained knowledge
thereof, but in no event later than two (2) Business Days thereafter, written
notice in an Officer's Certificate of any event which with the giving of notice
or lapse of time, or both, would become a Servicer Termination Event under any
other clause of Section 4.1.

          Section  2.11.  Access to Certain Documentation and Information
                          -----------------------------------------------
Regarding Receivables. The Servicer shall provide to representatives of the
---------------------
Collateral Agent and the Agent reasonable access to the documentation regarding
the Receivables. In each case, such access shall be afforded without charge and,
provided no Servicer Termination Event or Potential Termination Event shall have
occurred, only upon reasonable request and during normal business hours. Nothing
in this Section shall affect the obligation of the Servicer to observe any
applicable law prohibiting disclosure of information regarding the Obligors, and
the failure of the Servicer to provide access as provided in this Section as a
result of such obligation shall not constitute a breach of this Section.

          Section 2.12.  Monthly Tape.  On or before the Remittance Date, the
                         ------------
Servicer will deliver to the Collateral Agent a computer tape and a diskette (or
any other electronic transmission acceptable to the Collateral Agent) in a
format acceptable to the Collateral Agent containing the information with
respect to the Receivables as of the preceding Accounting Date necessary for
preparation of the Servicer's Certificate relating to the immediately preceding
Determination Date and necessary to determine the application of collections.

          Section 2.13.  Fidelity Bond and Errors and Omissions Policy.  The
                         ---------------------------------------------
Servicer has

                                       15
<PAGE>

obtained, and shall continue to maintain in full force and effect, a fidelity
bond and errors and omissions policy of a type and in such amount as is
customary for servicers engaged in the business of servicing automobile
receivables.

                                  ARTICLE III

                                 THE SERVICER
                                 ------------

          Section 3.1.   Liability of Servicer; Indemnities.
                         ----------------------------------

          (a)  The Servicer (in its capacity as such) shall be liable hereunder
only to the extent of the obligations in this Agreement and the Security
Agreement specifically undertaken by the Servicer and the representations made
by the Servicer herein and therein.

          (b)  The Servicer shall defend, indemnify and hold harmless the Trust,
the Trustee, the Collateral Agent, the Agent, the Secured Parties and their
respective officers, directors, agents and employees, from and against any and
all costs, expenses, losses, damages, claims and liabilities, including
reasonable fees and expenses of counsel and expenses of litigation arising out
of or resulting from the use, ownership or operation by the Servicer or any
Affiliate thereof of any Financed Vehicle;

          AmeriCredit shall indemnify, defend and hold harmless the Trust, the
Trustee, the Collateral Agent, the Agent, the Secured Parties and their
respective officers, directors, agents and employees from and against any taxes
that may at any time be asserted against any of such parties with respect to the
transactions contemplated in this Agreement, including, without limitation, any
sales, gross receipts, tangible or intangible personal property, privilege or
license taxes (but not including any federal or other income taxes, including
franchise taxes asserted with respect to, and as of the date of, the sale of the
Receivables and the Other Conveyed Property to the Trust) and costs and expenses
in defending against the same;

          (c)  The Servicer shall indemnify, defend and hold harmless the Trust,
the Trustee, and the Collateral Agent, the Secured Parties and their respective
officers, directors, agents and employees from and against any and all costs,
expenses, losses, claims, damages, and liabilities to the extent that such cost,
expense, loss, claim, damage, or liability arose out of, or was imposed upon the
Trust, the Trustee, the Collateral Agent or the Secured Parties by reason of the
breach of this Agreement by the Servicer, the negligence, misfeasance, or bad
faith of the Servicer in the performance of its duties under this Agreement or
by reason of reckless disregard of its obligations and duties under this
Agreement;

          (d)  AmeriCredit shall indemnify the Collateral Agent, the Trustee and
their officers, directors, agents and employees thereof against any and all
loss, liability or expense, (other than overhead and expenses incurred in the
normal course of business) incurred by each of them in connection with the
acceptance or administration of the Trust and the performance of their duties
under the Transaction Documents other than if such loss, liability or expense is
conclusively determined by a judicial proceeding to have been incurred by the
Collateral Agent as a result of any such entity's willful misconduct, bad faith
or negligence,; and

          (e)  Indemnification under this Article shall survive the termination
of the

                                       16
<PAGE>

Transaction Documents or the resignation and removal of the Trustee and shall
include, without limitation, reasonable fees and expenses of counsel and
expenses of litigation. If the Servicer has made any indemnity payments pursuant
to this Article and the recipient thereafter collects any of such amounts from
others, the recipient shall promptly repay such amounts collected to the
Servicer, without interest.

          Section 3.2.  Merger or Consolidation of, or Assumption of the
                        ------------------------------------------------
Obligations of the Servicer.  AmeriCredit shall not merge or consolidate with
---------------------------
any other person, convey, transfer or lease substantially all its assets as an
entirety to another Person, or permit any other Person to become the successor
to AmeriCredit's business unless, after the merger, consolidation, conveyance,
transfer, lease or succession, the successor or surviving entity shall be
capable of fulfilling the duties of AmeriCredit contained in this Agreement and
shall be acceptable to the Agent in the Agent's sole discretion. Any corporation
(i) into which AmeriCredit may be merged or consolidated, (ii) resulting from
any merger or consolidation to which AmeriCredit shall be a party, (iii) which
acquires by conveyance, transfer, or lease substantially all of the assets of
AmeriCredit, or (iv) succeeding to the business of AmeriCredit, in any of the
foregoing cases shall execute an agreement of assumption to perform every
obligation of AmeriCredit under this Agreement and, whether or not such
assumption agreement is executed, shall be the successor to AmeriCredit under
this Agreement without the execution or filing of any paper or any further act
on the part of any of the parties to this Agreement, anything in this Agreement
to the contrary notwithstanding; provided, however, that nothing contained
herein shall be deemed to release AmeriCredit from any obligation. AmeriCredit
shall provide notice of any merger, consolidation or succession pursuant to this
Section to the Collateral Agent and the Secured Parties. Notwithstanding the
foregoing, AmeriCredit shall not merge or consolidate with any other Person or
permit any other Person to become a successor to AmeriCredit's business, unless
(x) immediately after giving effect to such transaction, no representation or
warranty made pursuant to Section 2.6 shall have been breached (for purposes
hereof, such representations and warranties shall speak as of the date of the
consummation of such transaction) and no Termination Event or Potential
Termination Event shall have occurred and be continuing, (y) AmeriCredit shall
have delivered to the Collateral Agent and the Agent an Officer's Certificate
and an Opinion of Counsel each stating that such consolidation, merger or
succession and such agreement of assumption comply with this Section and that
all conditions precedent, if any, provided for in this Agreement relating to
such transaction have been complied with, and (z) AmeriCredit shall have
delivered to the Collateral Agent and the Agent an Opinion of Counsel, stating
in the opinion of such counsel, either (A) all financing statements and
continuation statements and amendments thereto have been executed and filed that
are necessary to preserve and protect the interest of the Trust in the
Receivables and the Other Conveyed Property and reciting the details of the
filings or (B) no such action shall be necessary to preserve and protect such
interest.

          Section 3.3.  Limitation on Liability of Servicer and Others.  None of
                        ----------------------------------------------
AmeriCredit nor any of the directors or officers or employees or agents of
AmeriCredit shall be under any liability to the Trust or the Secured Parties,
except as provided in this Agreement, for any action taken or for refraining
from the taking of any action pursuant to this Agreement; provided, however,
that this provision shall not protect AmeriCredit or any such person against any
liability that would otherwise be imposed by reason of a breach of this
Agreement or willful misfeasance, bad faith or negligence in the performance of
duties; provided further that this

                                       17
<PAGE>

provision shall not affect any liability to indemnify the Collateral Agent for
costs, taxes, expenses, claims, liabilities, losses or damages paid by the
Collateral Agent, in its individual capacity. AmeriCredit and any director,
officer, employee or agent of AmeriCredit may rely in good faith on the written
advice of counsel or on any document of any kind prima facie properly executed
and submitted by any Person respecting any matters arising under this Agreement.

          Section 3.4.  Delegation of Duties.  The Servicer may delegate duties
                        --------------------
under this Agreement to an Affiliate of AmeriCredit with the prior written
consent of the Agent. The Servicer also may at any time perform through sub-
contractors the specific duties of (i) repossession of Financed Vehicles, (ii)
tracking Financed Vehicles' insurance and (iii) pursuing the collection of
deficiency balances on certain Defaulted Receivables, in each case, without the
consent of the Agent and may perform other specific duties through such sub-
contractors in accordance with Servicer's customary servicing policies and
procedures, with the prior consent of the Agent; provided, however, that no such
                                                 --------  -------
delegation or sub-contracting duties by the Servicer shall relieve the Servicer
of its responsibility with respect to such duties. Neither AmeriCredit or any
party acting as Servicer hereunder shall appoint any subservicer hereunder
without the prior written consent of the Agent.

          Section 3.5.  Servicer Not to Resign.  Subject to the provisions of
                        ----------------------
Section 3.2, the Servicer shall not resign from the obligations and duties
imposed on it by this Agreement as Servicer except upon a determination that by
reason of a change in legal requirements the performance of its duties under
this Agreement would cause it to be in violation of such legal requirements in a
manner which would have a material adverse effect on the Servicer and the Agent
does not elect to waive the obligations of the Servicer to perform the duties
which render it legally unable to act or to delegate those duties to another
Person. Any such determination permitting the resignation of the Servicer shall
be evidenced by an Opinion of Counsel to such effect delivered and acceptable to
the Agent. No resignation of the Servicer shall become effective until a
successor Servicer that is an eligible servicer as approved by the Agent, shall
have assumed the responsibilities and obligations of the Servicer.

          Section 3.6.  Administrative Duties of Servicer.  (a)  Duties with
                        ---------------------------------        -----------
Respect to the Transaction Documents.  The Servicer shall perform the duties of
------------------------------------
the Debtor under the Transaction Documents. In furtherance of the foregoing, the
Servicer shall consult with the Trustee as the Servicer deems appropriate
regarding the duties of the Debtor under the Transaction Documents. The Servicer
shall monitor the performance of the Debtor and shall advise the Trustee when
action is necessary to comply with the Debtor's duties under the Transaction
Documents. The Servicer shall prepare for execution by the Trustee or shall
cause the preparation by other appropriate Persons of all such documents,
reports, filings, instruments, certificates and opinions as it shall be the duty
of the Debtor or the Trustee to prepare, file or deliver pursuant to the
Transaction Documents.

          (b)  Duties with Respect to the Debtor.
               ---------------------------------

          (i)  In addition to the duties of the Servicer set forth in this
Agreement or any of the Transaction Documents, the Servicer shall perform such
calculations and shall prepare, or shall cause the preparation, for execution by
the Trustee or other appropriate Persons of all such documents, reports,
filings, instruments, certificates and opinions as it shall be the duty of the

                                       18
<PAGE>

Debtor to prepare, file or deliver pursuant to state and federal tax and
securities laws. The Servicer shall administer, perform or supervise the
performance of such other activities in connection with the Debtor as are not
covered by any of the foregoing provisions and as are expressly requested by the
Trustee and are reasonably within the capability of the Servicer.

          (ii)  Notwithstanding anything in this Agreement or any of the
Transaction Documents to the contrary, the Servicer shall be responsible for
promptly notifying the Trustee in the event that any withholding tax is imposed
on the Debtor's payments (or allocations of income) to a Certificateholder. Any
such notice shall be in writing and specify the amount of any withholding tax
required to be withheld by the Trustee pursuant to such provision.

          (c)   Records.  The Servicer shall maintain appropriate books of
                -------
account and records relating to services performed under this Agreement and as
required by the Transaction Documents, which books of account and records shall
be accessible for inspection by the Trustee at any time during normal business
hours.

          (d)   Additional Information to be Furnished to the Debtor.  The
                ----------------------------------------------------
Servicer shall furnish to the Trustee from time to time such additional
information regarding the Debtor or the Transaction Documents as the Trustee
shall reasonably request.

                                  ARTICLE IV

                             SERVICER TERMINATION
                             --------------------

          Section 4.1.   Servicer Termination Event. For purposes of this
                         --------------------------
Agreement, each of the following shall constitute a "Servicer Termination
Event":

          (a)  Any failure by the Servicer to deliver to the Collateral Agent
for distribution to Secured Parties payment required to be so delivered under
the terms of the Transaction Documents;

          (b)  Failure on the part of the Servicer duly to observe or perform in
any material respect any covenant or agreement set forth in this Agreement or
any other Transaction Document to which it is a party, which failure continues
unremedied for a period of 10 days;

          (c)  Any representation, warranty, certification or statement made by
the Servicer (including AmeriCredit, if it is the Servicer) or the Trust, any
Seller or any Affiliate of the Trust or any Seller (in the event that the Trust,
any Seller or such Affiliate is then acting as the Servicer) in this Agreement,
the Receivables Purchase Agreement or in any of the other Transaction Documents
or in any certificate or report delivered by it pursuant to any of the foregoing
shall prove to have been incorrect in any material respect when made or deemed
made;

          (d)  The Servicer shall materially modify the Credit and Collection
Policy, unless it has given the Agent prompt notification of such modification
and the Agent has determined in its reasonable discretion that such modification
is not a material adverse change;

                                       19
<PAGE>

          (e)  The occurrence of a Termination Event listed in Section 6.1 of
the Security Agreement as item (a), (b), (c), (d), (g), (h), (k)(ii), (o),
(p)(i), (r), (u) or (v) in the definition thereof in the Security Agreement;

          (f)  Any Event of Bankruptcy shall occur with respect to the Servicer
or any of its Subsidiaries or Affiliates;

          (g)  There shall have occurred a Material Adverse Effect with respect
to the Servicer since the end of the last fiscal year ending prior to the date
of its appointment as Servicer hereunder or any other event shall have occurred
which, in the commercially reasonable judgment of the Agent, materially and
adversely affects the Servicer's ability to either collect the Receivables or to
perform under this Agreement; and

          (h)  Failure of the Servicer or any Subsidiary of the Servicer to pay
when due any amounts due under any agreement to which any such Person is a party
and under which any Indebtedness greater than $5,000,000, in the case of
AmeriCredit or any Subsidiary of AmeriCredit (other than the Debtor), is
governed; or the default by the Servicer or any Subsidiary of the Servicer in
the performance of any term, provision or condition contained in any agreement
to which any such Person is a party and under which any Indebtedness owing by
the Servicer or any Subsidiary of the Servicer greater than such respective
amounts was created or is governed, regardless of whether such event is an
"event of default" or "default" under any such agreement; or any Indebtedness
owing by the Servicer or any Subsidiary of the Servicer greater than such
respective amounts shall be declared to be due and payable or required to be
prepaid (other than by a regularly scheduled payment) prior to the date of
maturity thereof.

          Section  4.2.  Consequences of a Servicer Termination Event. If a
                         --------------------------------------------
Servicer Termination Event shall occur and be continuing, the Agent, by notice
given in writing to the Servicer may terminate all of the rights and obligations
of the Servicer under this Agreement. On or after the receipt by the Servicer of
such written notice or upon termination of the term of the Servicer, all
authority, power, obligations and responsibilities of the Servicer under this
Agreement, whether with respect to the Receivables or the Other Conveyed
Property (as defined in the Master Receivables Purchase Agreement) or otherwise,
automatically shall pass to, be vested in and become obligations and
responsibilities of a successor Servicer appointed by the Agent); provided,
                                                                  --------
however, that the successor Servicer shall have no liability with respect to any
-------
obligation which was required to be performed by the terminated Servicer prior
to the date that the successor Servicer becomes the Servicer or any claim of a
third party based on any alleged action or inaction of the terminated Servicer.
The successor Servicer is authorized and empowered by this Agreement to execute
and deliver, on behalf of the terminated Servicer, as attorney-in-fact or
otherwise, any and all documents and other instruments and to do or accomplish
all other acts or things necessary or appropriate to effect the purposes of such
notice of termination, whether to complete the transfer and endorsement of the
Receivables and the Other Conveyed Property and related documents to show the
Trust as lienholder or secured party on the related Lien Certificates, or
otherwise. The terminated Servicer agrees to cooperate with the successor
Servicer in effecting the termination of the responsibilities and rights of the
terminated Servicer under this Agreement, including, without limitation, the
transfer to the successor Servicer for administration by it of all cash amounts
that shall at the time be held by the terminated Servicer for deposit, or have
been deposited by the terminated Servicer, in the

                                       20
<PAGE>

Collection Account or thereafter received with respect to the Receivables and
the delivery to the successor Servicer of all Receivable Files, Monthly Records
and Collection Records and a computer tape in readable form as of the most
recent Business Day containing all information necessary to enable the successor
Servicer or a successor Servicer to service the Receivables and the Other
Conveyed Property. If requested by the Agent, the successor Servicer shall
terminate the Lock-Box Agreement and direct the Obligors to make all payments
under the Receivables directly to the successor Servicer (in which event the
successor Servicer shall process such payments in accordance with Section
2.2(d)), or to a Lock-Box Account established by the successor Servicer at the
direction of the Agent, at the successor Servicer's expense. The terminated
Servicer shall grant the Collateral Agent, the successor Servicer and the Agent
reasonable access to the terminated Servicer's premises at the terminated
Servicer's expense.

          Section 4.3.   Appointment of Successor.
                         ------------------------

          (a)  On and after the time the Servicer receives a notice of
termination pursuant to Section 4.2, or upon the resignation of the Servicer,
the Agent shall appoint an alternate successor Servicer who shall be subject to
all the rights, responsibilities, restrictions, duties, liabilities and
termination provisions relating thereto placed on the Servicer by the terms and
provisions of this Agreement except as otherwise stated herein. The Collateral
Agent and such successor shall take such action, consistent with this Agreement,
as shall be necessary to effectuate any such succession. If a successor Servicer
is acting as Servicer hereunder, it shall be subject to termination under
Section 4.2 upon the occurrence of any Servicer Termination Event applicable to
it as Servicer.

          (b)  Any successor Servicer shall be entitled to such compensation
(whether payable out of the Collection Account or otherwise) as the Servicer
would have been entitled to under this Agreement if the Servicer had not
resigned or been terminated hereunder. The Agent and such successor Servicer may
agree on additional compensation to be paid to such successor Servicer. In
addition, any successor Servicer shall be entitled to reasonable transition
expenses incurred in acting as successor Servicer.

          Section 4.4.   Notification to Secured Parties.  Upon any termination
                         -------------------------------
of, or appointment of a successor to, the Servicer, the Collateral Agent shall
give prompt written notice thereof to each Secured Party.

          Section 4.5.   Waiver of Past Defaults.  The Agent may, on behalf of
                         -----------------------
all Secured Parties, waive any default by the Servicer in the performance of its
obligations hereunder and its consequences. Upon any such waiver of a past
default, such default shall cease to exist, and any Servicer Termination Event
arising therefrom shall be deemed to have been remedied for every purpose of
this Agreement. No such waiver shall extend to any subsequent or other default
or impair any right consequent thereto.

                                   ARTICLE V

                                 THE CUSTODIAN
                                 -------------

          Section 5.1.   Appointment of Custodian; Acknowledgment of Receipt.
                         ---------------------------------------------------
Subject

                                       21
<PAGE>

to the terms and conditions hereof, the Collateral Agent hereby revocably
appoints the Custodian and the Custodian hereby accepts such appointment, as
custodian and bailee on behalf of the Collateral Agent (for the benefit of the
Secured Parties) to maintain exclusive custody of the Receivable Files relating
to the Receivables from time to time held as part of the Collateral; provided,
                                                                     --------
however, that neither the Collateral Agent nor any Secured Party shall be
-------
responsible for the acts or omissions of the Custodian. In performing its duties
hereunder, the Custodian agrees to act with that degree of care, 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, and, in any event,
to exercise at least that degree of care, skill and attention that it exercises
with respect to its own assets. The Custodian, as of each Receivables Transfer
Date with respect to the Receivables sold on such date, hereby acknowledges
receipt of the Receivable File for each Receivable listed in the Schedules of
Receivables attached to the related Supplement, subject to any exceptions noted
on the applicable Custodian's Acknowledgment. As evidence of its acknowledgement
of such receipt of such Records, the Custodian shall execute and deliver on each
Receivables Transfer Date with respect to the Receivables sold on such date, the
Custodian's Acknowledgement in the form attached hereto as Schedule A.

          Section 5.2.  Maintenance of Records at Office.  The Custodian agrees
                        --------------------------------
to maintain the Receivable Files at 4001 Embarcadero Drive, Arlington, Texas
76014 or at such other office as shall from time to time be identified to the
Collateral Agent and the Agent, and the Custodian will hold the Receivable Files
in such office on behalf of the Collateral Agent (for the benefit of the Secured
Parties), clearly identified on its records as being separate from any other
instruments and files, including other instruments and files held by the
Custodian, and in compliance with Section 5.3(b) hereof.

          Section 5.3.  Duties of Custodian.
                        -------------------

          (a)  Safekeeping.  The Custodian shall hold the Receivable Files on
               -----------
behalf of the Collateral Agent (for the benefit of the Secured Parties) clearly
identified as being separate from all other files or records maintained by the
Custodian, whether at the same or any other location, and shall maintain such
accurate and complete accounts, records or computer systems pertaining to each
Receivable File as are required to comply with the terms and conditions of the
Note Purchase Agreement. Each Contract shall be stamped on both of the first
page and the signature page (if different) in accordance with the requirements
of any Opinion of Counsel or as otherwise is deemed necessary or desirable by
the Collateral Agent and the Agent. Each Receivable shall be identified on the
books and records of the Custodian in an 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 Collateral Agent and (iii) is otherwise necessary, as
reasonably determined by the Custodian, to comply with the terms of this
Agreement. The Custodian shall conduct, or cause to be conducted, periodic
physical inspections of the Receivable Files held by it under this Agreement,
and of the related accounts, records and computer systems, in such a manner as
shall enable the Collateral Agent, the Agent 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 Collateral Agent and the
Agent may request and the cost of such inspections shall be borne by

                                       22
<PAGE>

the Custodian. The Custodian shall promptly report to the Collateral Agent and
the Agent any failure on the Custodian's part to hold the Receivable Files and
maintain its accounts, records and computer systems as herein provided and the
Custodian shall promptly take appropriate action to remedy any such failure.
Notwithstanding the above, upon a Servicer Termination Event, on or prior to
each Receivables Transfer Date, with respect to the Receivables sold on such
dates, 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 Collateral Agent and the Collateral Agent shall hold such
Copies on behalf of the Secured Parties. Subject to Section 5.3(c) hereof, the
Custodian shall at all times maintain the original of the fully executed
original retail installment sales contract or promissory note and of the Lien
Certificate or application therefore, if no such Lien Certificate has yet been
issued, relating to each Receivable in a fire proof vault.

          (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 Secured Parties and the 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 any of the Secured
Parties or the Collateral Agent may reasonably request.

          (c)  Release of Documents.  The Custodian shall release such
               --------------------
Receivable Files to the Servicer only (1) upon payment in full of such
Receivable or (2) as required from time to time as appropriate for servicing and
enforcing any Receivable but, in the case of clause (1) or (2), only as is
consistent with the terms of the Note Purchase Agreement and the Security
Agreement.

          (d)  Administration; Reports.  The Custodian shall, in general,
               -----------------------
attend to all ministerial matters in connection with maintaining custody of the
Receivable Files on behalf of the Collateral Agent. In addition, the Custodian
shall assist the Collateral Agent or the Servicer, as the case may be, in the
preparation of any routine reports to Secured Parties or to regulatory bodies,
to the extent necessitated by the Custodian's custody of the Receivable Files.

          (e)  Review of Lien Certificates.  Upon the written request of the
               ---------------------------
Agent, the Custodian shall deliver to the Collateral Agent, within 2 days of
such request, a listing of all Receivables with respect to which a Lien
Certificate, showing AmeriCredit as secured party, was not included in the
related Receivable File as of the date of such request.

          Section 5.4.  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 Collateral Agent. Such instructions may be general or specific in terms.

          Section 5.5.  Custodian Fee. For its services under this Agreement,
                        -------------
the Custodian shall be entitled to reasonable  compensation to be paid by the
Servicer.

                                       23
<PAGE>

          Section 5.6.  Indemnification by the Custodian.  The Custodian agrees
                        --------------------------------
to indemnify the Secured Parties, the Trust, the Agent, the Trustee and the
Collateral Agent for any and all liabilities, obligations, losses, damage,
payments, costs or expenses of any kind whatsoever (including the fees and
expenses of counsel) that may be imposed on, incurred or asserted against any of
the Secured Parties, the Trust, the Agent and/or the Collateral Agent as the
result of any act or omission in any way relating to the maintenance and custody
by the Custodian of the Receivable Files or any default by the Custodian of its
obligations hereunder; provided, however, that the Custodian shall not be liable
                       --------  -------
to any party indemnified hereunder for any portion of any such liabilities,
obligations, losses, damages, payments or costs or expenses as are due to the
willful misfeasance, bad faith or gross negligence of such indemnified party.

          Section 5.7.  Advice of Counsel.  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 in good
faith pursuant to such advice, provided that such action is not in violation of
applicable federal or state law.

          Section 5.8.  Effective Period, Termination, and Amendment;
                        ---------------------------------------------
Interpretive and Additional Provisions.  This Agreement shall become  effective
--------------------------------------
as of the date hereof and shall continue in full force and effect until
terminated as hereinafter provided. This Agreement may be amended at any time by
agreement of the Collateral Agent, the Agent and the Custodian and may be
terminated by either the Collateral Agent, the Agent 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 in the case of a termination
by the Collateral Agent or the Agent (which 30 day period may be shorter as set
forth in the notice of termination in the case of a Termination Event) or ninety
(90) days after the date of such notice in the case of a termination by the
Custodian; provided so long as AmeriCredit is Custodian, the Custodian shall not
           --------
resign from the obligations and duties imposed on it by this Agreement, except
upon a determination that by reason of a change in legal requirements, the
performance of its duties under this Agreement would cause it to be in violation
of such legal requirements in a manner which would have a material adverse
effect on it and the Agent does not elect to waive the obligations of the
Custodian to perform the duties which render it legally unable to act or to
delegate those duties to another Person; provided, further, that any such
                                         --------  -------
determination permitting the resignation of the Custodian shall be evidenced by
an Opinion of Counsel to such effect delivered to the Agent and the Collateral
Agent that is acceptable to the Agent. So long as AmeriCredit is serving as
Custodian, any termination of AmeriCredit as Servicer under the Note Purchase
Agreement or the Security Agreement shall terminate AmeriCredit as Custodian
under this Agreement. Immediately after receipt of notice of termination of this
Agreement, the Custodian shall deliver the Receivable Files to the Collateral
Agent on behalf of the Secured Parties, at such place or places as the
Collateral Agent may designate, and the Collateral Agent, or its agent, as the
case may be, shall act as custodian for such Records on behalf of the Secured
Parties until such times as a successor custodian has been appointed by the
Collateral Agent. (For the avoidance of doubt, during any such period, the
Collateral Agent shall be acting in its capacity as Collateral Agent, including
the standard of care and liability in such capacity, and not as a successor
"Custodian" hereunder.) If, within forty-eight (48) hours after the termination
 ---------
of this Agreement, the Custodian has not delivered the Receivable Files in
accordance with the preceding sentence, the 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

                                       24
<PAGE>

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.

          Section 5.9.   Representations, Warranties and Covenants of Custodian.
                         ------------------------------------------------------

          (a) The Custodian hereby represents and warrants to, and covenants
with, the Collateral Agent that as of the date hereof and as of each Receivables
Transfer Date:

          (i)    The Custodian is duly organized, validly existing and in good
     standing under the laws of the state of its incorporation;

          (ii)   The Custodian has the full power and authority to hold each
     Receivable File on behalf of the Collateral Agent, and to execute, deliver
     and perform, and to enter into and consummate all transactions contemplated
     by this Agreement, has duly authorized the execution, delivery and
     performance of this Agreement, has duly executed and delivered this
     Agreement, and this Agreement constitutes a legal, valid and binding
     obligation of the Custodian, enforceable against it in accordance with its
     terms, except as enforcement of such terms may be limited by bankruptcy,
     insolvency or similar laws affecting the enforcement of creditors' rights
     generally and by the availability of equitable remedies;

          (iii)  The consummation of the transactions contemplated by this
     Agreement and the Transaction Documents to which the Custodian is a Party,
     and the fulfillment of the terms of this Agreement and the Transaction
     Documents to which the Custodian is a Party, shall 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 articles of
     incorporation or bylaws of the Custodian, or any indenture, agreement,
     mortgage, deed of trust or other instrument to which the Custodian 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, mortgage, deed of trust or other instrument, other
     than this Agreement, or violate any law, order, rule or regulation
     applicable to the Custodian of any court or of any federal or state
     regulatory body, administrative agency or other governmental
     instrumentality having jurisdiction over the Custodian or any of its
     properties and do not require any action by or require the consent of or
     the filing of any notice with any Official Body or other Person;

          (iv)   There is no litigation pending or, to the Custodian's
     knowledge, threatened, which if determined adversely to the Custodian,
     would adversely affect the execution, delivery or enforceability of this
     Agreement, or any of the duties or obligations of the Custodian thereunder,
     or which would have a material adverse effect on the financial condition of
     the Custodian;

          (v)    No consent, approval, authorization or order of any court or
     governmental agency or body is required for the execution, delivery and
     performance by the Custodian of or compliance by the Custodian with this
     Agreement or the consummation of the transactions contemplated hereby or
     thereby;

                                       25
<PAGE>

          (vi)   Upon written request of the Collateral Agent or the Agent, the
     Custodian shall take such steps as requested by the Collateral Agent or the
     Agent to protect or maintain any interest in any Receivable; and

          (vii)  The Custodian has not been notified by any party that any third
     party claims an interest in the Receivables or is requesting the Custodian
     to act as a bailee with respect to the Records, except such interests that
     are created under the Master Receivables Purchase Agreement, the Security
     Agreement, the Note Purchase Agreement and any Supplement.

          (b)  The Custodian covenants and warrants to the Collateral Agent
and each of the Secured Parties that as of the date of each Custodian's
Acknowledgment: (i) it holds no adverse interest, by way of security or
otherwise, in any Receivable or Receivable File; and (ii) the execution of this
Agreement and the creation of the custodial relationship hereunder does not
create any interest, by way of security or otherwise, of the Custodian in or to
any Receivable or Receivable File, other than the Custodian's rights as
custodian hereunder.

          (c)  The Custodian shall, at its own expense, maintain at all times
during the existence of this Agreement and keep in full force and effect, a
fidelity bond and errors and omissions policy of a type and in such amount as is
customary for custodians engaged in the business of acting as custodian of
automobile receivables and shall maintain any other similar insurance policies
that are customarily maintained by custodians engaged in the business of acting
as custodian of automobile receivables. A certificate of the respective insurer
as to each such policy or a blanket policy for such coverage shall be furnished
to the Collateral Agent and the Agent containing the insurer's statement or
endorsement that such insurance shall not terminate prior to receipt by such
party, by certified mail, of 10 days advance notice thereof.

                                  ARTICLE VI

                                 MISCELLANEOUS
                                 -------------

          Section 6.1.   Governing  Law. This  Agreement  shall be governed by
                         --------------
and construed in accordance with the laws of the State of New York without
giving effect to the conflict of law provisions thereof.

          Section 6.2.   Notices.  All demands, notices and communications
                         -------
hereunder shall be in writing (including bank wire, telex, telecopy or
electronic facsimile transmission or similar writing) and shall be given to the
other party at its address or telecopy number set forth below or at such other
address or telecopy number as such party may hereafter specify for the purposes
of notice to such party. Each such notice or other communication shall be
effective (i) if given by telecopy, when such telecopy is transmitted to the
telecopy number specified in this Section and confirmation is received, (ii) if
given by mail three (3) Business Days following such posting, if postage
prepaid, or if sent via U.S. certified or registered mail, (iii) if given by
overnight courier, one (1) Business Day after deposit thereof with a national
overnight courier service, or (iv) if given by any other means, when received at
the address specified in this Section.

                                       26
<PAGE>

          If to the Trust:

          AmeriCredit Barclays Trust
          c/o Bankers Trust (Delaware)
          E.A. Delle Donne Corporate Center
          Montgomery Building
          1011 Centre Road, Suite 200
          Wilmington, Delaware 19805
          Attention: Corporate Trust Administration

          Telephone: (302) 636-3305
          Telecopy:  (302) 636-3222

          with a copy to:
          Bankers Trust Company
          4 Albany Street
          New York, New York 10006
          Attention: Asset Backed Finance Unit

          If to the Servicer or the Custodian:

          AmeriCredit Financial Services, Inc.
          801 Cherry Street
          Suite 3900
          Fort Worth, Texas 76102

          Telephone: (817) 302-7022
          Telecopy:  (817) 302-7942

          If to the Agent:

          Barclays Bank PLC
          222 Broadway
          New York, New York 10038
          Telephone: (212) 412-2932
          Telecopy:  (212) 412-6846

          If to the Collateral Agent:

          Bank One, N.A.
          100 East Broad Street, 8th Floor
          Columbus, Ohio 43215
          Attention: John Rothrock
          Telephone: (614) 248-5683
          Telecopy:  (614) 248-5195

          Section 6.3.  Binding  Effect.  This Agreement shall be binding upon
                        ---------------
and shall inure to the benefit of the parties hereto and their respective
successors and assigns. In addition,

                                       27
<PAGE>

each of the Secured Parties shall be a third party beneficiary hereof.
Concurrently with the appointment of a successor Collateral Agent under the
Security Agreement, the parties hereto shall amend this Agreement to make said
Collateral Agent, the successor to the Collateral Agent hereunder.

          Section 6.4.   Severability.  Any provision of this Agreement that is
                         ------------
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

          Section  6.5.  Separate 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 but one and the same instrument.

          Section 6.6.   Limitation of Liability of Trustee.  It is expressly
                         ----------------------------------
understood and agreed by the parties hereto that (a) this Agreement is executed
and delivered by Bankers Trust (Delaware), not individually or personally but
solely as Trustee of the Trust, in the exercise of the powers and authority
conferred and vested in it, (b) each of the representations, undertakings and
agreements herein made on the part of the Trust is made and intended not as
personal representations, undertakings and agreements by Bankers Trust
(Delaware) but is made and intended for the purpose for binding only the Trust,
(c) nothing herein contained shall be construed as creating any liability on
Bankers Trust (Delaware), individually or personally, to perform any covenant
either expressed or implied contained herein, all such liability, if any, being
expressly waived by the parties hereto and by any Person claiming by, through or
under the parties hereto and (d) under no circumstances shall Bankers Trust
(Delaware) be personally liable for the payment of any indebtedness or expenses
of the Trust or be liable for the breach or failure of any obligation,
representation, warranty or covenant made or undertaken by the Trust under this
Agreement or any other Transaction Documents; provided, however, that no
provision of this Agreement shall be construed to relieve the Trustee from
liability for its own negligent action, its own negligent failure to act, its
action in bad faith or its own willful misconduct.

                                       28
<PAGE>

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

                                   BANK ONE, N.A.
                                    solely in its capacity as Collateral Agent

                                   By:______________________________________
                                   Name:
                                   Title:

                                   AMERICREDIT FINANCIAL SERVICES, INC.,
                                    as Servicer and Custodian

                                   By:______________________________________
                                   Name:
                                   Title:

                                   BARCLAYS BANK PLC,
                                    as Agent

                                   By:______________________________________
                                   Name:
                                   Title:

                                   AMERICREDIT BARCLAYS TRUST
                                   By: BANKERS TRUST (DELAWARE),
                                       not in its individual capacity but solely
                                       as Trustee

                                   By:______________________________________
                                   Name:
                                   Title:

                      [Servicing and Custodian Agreement]

                                       29
<PAGE>

                                                                      SCHEDULE A

                      FORM OF CUSTODIAN'S ACKNOWLEDGMENT

          AmeriCredit Financial Services, Inc. (the "Custodian"), acting as
                                                     ---------
Custodian under an Amended and Restated Servicing and Custodian Agreement, dated
as of August 31, 2000 (the "Servicing and Custodian Agreement"), between the
Custodian, AmeriCredit Barclays Trust, as Debtor, Bank One, N.A., as Collateral
Agent, and Barclays Bank PLC, as Agent, pursuant to which the Custodian holds on
behalf of the Secured Parties certain Receivable Files (as defined in the
Servicing and Custodian Agreement), hereby acknowledges receipt of the
Receivable File for each Receivable listed in the Schedules of Receivables
attached as Exhibits to the Supplements to the Receivables Purchase Agreement,
dated [insert date of the relevant Supplement], except as noted in the Exception
       --------------------------------------
List attached as Schedule I hereto.

          IN WITNESS WHEREOF, AmeriCredit Financial Services, Inc., has caused
this acknowledgment to be executed by its duly authorized officer as of this
[__] day of [_____], [_____].

                                            AMERICREDIT FINANCIAL SERVICES, INC.
                                            as Custodian

                                            By:_________________________________
                                            Name:
                                            Title:

                                       i

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