Document:

<PAGE>   1
                                                                  Exhibit 4.01.1

                                                                  EXECUTION COPY

                                AMENDMENT NO. 1

     AMENDMENT NO. 1, dated as of February 17, 2000 (this "Amendment"), to the
Third Amended and Restated Credit Agreement, dated as of September 30, 1999 (as
amended, supplemented or otherwise modified from time to time, the "Credit
Agreement"), among CSK AUTO, INC. (the "Company"), the several lenders from time
to time parties to the Credit Agreement (the "Lenders"), THE CHASE MANHATTAN
BANK, a New York banking corporation, as administrative agent for the Lenders
(in such capacity, the "Administrative Agent"), DLJ CAPITAL FUNDING, INC., a
Delaware corporation, as syndication agent for the Lenders (in such capacity,
the "Syndication Agent") and LEHMAN COMMERCIAL PAPER INC., as Delaware
corporation, as documentation agent for the Lenders (in such capacity, the
"Documentation Agent").

                              W I T N E S S E T H:

     WHEREAS, the Company wishes to enter into a joint venture with Advance
Stores Company Incorporated ("Advance Stores") and certain financial investors,
to make capital and other asset contributions (the "PartsAmerica Investment") to
PartsAmerica.com, Inc. ("PartsAmerica"), and to acquire and subscribe to a
portion of the outstanding Capital Stock of PartsAmerica pursuant to an asset
contribution agreement and a stock purchase agreement and any related
agreements, collectively having terms substantially consistent with the terms
described in the Summary Terms of Proposed Formation of and Investment in
PartsAmerica and the Summary Term Sheet of PartsAmerica Services Agreement,
attached hereto as Annex 1 ("PartsAmerica Term Sheet") or otherwise reasonably
satisfactory to the Administrative Agent;

     WHEREAS, in connection with the PartsAmerica Investment, the Company shall
provide certain services to PartsAmerica in accordance with a services agreement
among PartsAmerica, Advance Stores and the Company (together with any related
agreements, collectively, the "PartsAmerica Services Agreement"), having terms
substantially consistent with the terms described in the PartsAmerica Term Sheet
or otherwise reasonably satisfactory to the Administrative Agent;

     WHEREAS, the Company has requested that the Lenders consent to amend
certain provisions in the Credit Agreement to allow for the PartsAmerica
Investment and the provision of services in connection therewith; and

     WHEREAS, the Lenders are willing to consent to the requested amendment on
any subject to the terms and conditions contained herein.

     NOW THEREFORE, in consideration of the foregoing premises and for other
good and valuable consideration the receipt and sufficiency of which is hereby
acknowledged, the parties hereto hereby agree as follows:

<PAGE>   2
                                                                               2

     I.  Definitions. Unless otherwise defined herein, terms defined in the
Credit Agreement are used herein as therein defined.

     II.  Amendments to Credit Agreement.

          A.  Amendments to Section 1 (Definitions).

          1. Subsection 1.1 of the Credit Agreement is hereby amended by adding
in their proper alphabetical order the following definitions:

          "Advance Stores": Advance Stores Company Incorporated, a Virginia
     corporation.

          "Company Pledge Agreement Amendment": the Amendment and Supplement to
     the Company Pledge Agreement, dated as of February 17, 2000, executed by
     the Company and the Administrative Agent, covering the PartsAmerica
     Investment, as the same may be amended, modified or supplemented from time
     to time.

          "PartsAmerica": PartsAmerica.com, Inc., a Delaware corporation.

          "PartsAmerica Investment": the capital and other asset contributions
     by the Company to, and the acquisition by the Company of a portion of the
     outstanding Capital Stock of, PartsAmerica pursuant to an asset
     contribution agreement and a stock purchase agreement, having terms
     substantially consistent with the terms described in the PartsAmerica Term
     Sheet or otherwise reasonably satisfactory to the Administrative Agent.

          "PartsAmerica Services Agreement": the services agreement among
     PartsAmerica, Advance Stores and the Company and any related agreements,
     collectively having terms substantially consistent with the terms described
     in the PartsAmerica Term Sheet or otherwise reasonably satisfactory to the
     Administrative Agent.

          "PartsAmerica Term Sheet": the Summary Terms of Proposed Formation of
     and Investment in PartsAmerica and the Summary Term Sheet of PartsAmerica
     Services Agreement, attached as Annex 1 to the Amendment No. 1, dated as of
     February   , 2000, to this Agreement.

          2.  Subsection 1.1 of the Credit Agreement is hereby amended by
deleting in its entirety the definitions of "Company Pledge Agreement" and
"Consolidated Net Income" and substituting in lieu thereof, respectively, the
following:

          "Company Pledge Agreement": the Company Pledge Agreement, dated as of
     June 22, 1999 made by the Company in favor of the Administrative Agent for
     the ratable benefit of the Lenders, a copy of which is attached hereto as
     Exhibit G-2, as amended,

<PAGE>   3
                                                                               3

     modified or supplemented by the Company Pledge Agreement Amendment, and as
     the same may be further amended, modified or supplemented from time to
     time.

          "Consolidated Net Income": for any period, net income of the Company
     and its Subsidiaries, determined on a consolidated basis in accordance with
     GAAP; provided that: (i) the net income (but not loss) of any Person that
     is not a Subsidiary or that is accounted for by the equity method of
     accounting shall be included only to the extent of the amount of dividends
     or distributions paid in cash to the Company or a wholly-owned Subsidiary,
     provided, further, that the non-cash charges associated with losses
     attributable to the PartsAmerica Investment shall be excluded, (ii) the net
     income of any Person acquired in a pooling of interests transaction for any
     period prior to the date of such acquisition shall be excluded and (iii)
     net income of any Subsidiary shall be excluded to the extent that the
     declaration or payment of dividends or similar distributions by that
     Subsidiary of that net income is prohibited or not permitted at the date of
     determination.

          B. Amendments to Section 7 (Affirmative Covenants). Subsection 7.9(b)
of the Credit Agreement is hereby amended by deleting said subsection in its
entirety and by substituting in lieu thereof the following:

          "As soon as practicable, deliver to the Administrative Agent (i) stock
     certificates representing 100% of all issued and outstanding shares of
     Capital Stock of (A) all Subsidiaries of the Company and (B) all other
     Persons of which the Capital Stock is issued, granted to, owned or held by
     the Company including, without limitation, the Capital Stock of
     PartsAmerica (unless the investment in such Person with respect to which
     Capital Stock is issued, granted to, owned or held by the Company has an
     initial value of less than $2,500,000 and the creation of a security
     interest by the Company with respect thereto is prohibited), and undated
     stock powers for each such certificate, executed in blank and delivered by
     a duly authorized officer of the Company, and (ii) executed supplements to
     the Subsidiary Guarantee and the Subsidiary Security Agreement and executed
     Subsidiary Pledge Agreement and/or supplements thereto, as applicable,
     each in form and substance satisfactory to the Administrative Agent,
     whereby any such Subsidiaries, of which the stock certificates, stock
     powers, relevant Security Documents and/or supplements to such Security
     Documents have not been previously delivered to the Administrative Agent,
     become party to such Subsidiary Guarantee, Subsidiary Security Agreement
     and Subsidiary Pledge Agreement."

          C. Amendments to Section 8 (Negative Covenants).

          1. Subsection 8.5 of the Credit Agreement is hereby amended by (i)
     deleting the word "and" at the end of clause (e) of said subsection, (ii)
     deleting the word "and" at the end of clause (f) of said subsection, (iii)
     deleting the period at the end of clause (g) of said subsection and
     substituting in lieu thereof a semi-colon and (iv) adding the following
     phrase to the end of said subsection immediately after the semi-colon at
     the end of clause (g):
<PAGE>   4
                                                                               4

     "(h) for the conveyance and transfer to PartsAmerica of such capital or
     other assets of the Company or any of its Subsidiary (as set forth in
     Schedule A to the PartsAmerica Term Sheet) as consideration for the
     acquisition of, and subscription to, such Capital Stock of PartsAmerica (as
     set forth in the PartsAmerica Term Sheet); and (i) for conveyances and
     transfers to the joint ventures specifically permitted under subsection
     8.6(k)".

          2.  Subsection 8.6 of the Credit Agreement is hereby amended by (i)
     deleting the word "and" at the end of clause (h) of said subsection, (ii)
     deleting the period at the end of clause (i) of said subsection and
     substituting in lieu thereof a semi-colon and (iii) adding the following
     phrase to the end of said subsection immediately after the semi-colon at
     the end of clause (i):

     "(j) the Company may make such capital and other asset contributions (as
     set forth in Schedule A to the PartsAmerica Term Sheet) to, and subscribe
     to and purchase such Capital Stock (as set forth in the PartsAmerica Term
     Sheet) of, PartsAmerica; and (k) the Company or any of its Subsidiaries may
     make investments in, or loans or investments to, joint ventures or other
     Persons engaged primarily in one or more businesses in which the Company
     and its Subsidiaries are engaged or directly related thereto in an
     aggregate amount not to exceed $7,500,000 plus the sum of any cash amounts
     dividended or distributed to the Company or any Subsidiary of the Company
     by such joint venture or other Person".

          3.  Subsection 8.12 of the Credit Agreement is hereby amended by (i)
     deleting the word "and" immediately before clause (z) after the proviso of
     said subsection and inserting in lieu thereof a comma and (ii) adding the
     following phrase to the end of said subsection immediately before the
     period:

     "and (xx) the provision of services and the performance of obligations
     contemplated to be provided and performed by the Company under the
     PartsAmerica Services Agreement".

The PartsAmerica Investment shall not affect the exceptions otherwise provided
under subsection 8.6.

     III.  Amendments to the Company Pledge Agreement. Each of the Lenders
parties hereto hereby requests, and consents to, the execution and delivery by
the Administrative Agent of (a) the Company Pledge Agreement Amendment and (b)
any instruments or documents reasonably requested by the Company releasing
security interests in favor of the Administrative Agent on assets included
within the PartsAmerica Investment.

     IV.   Amendments to the Security Agreements. Each of the Lenders parties
hereto hereby requests, and consents to, the execution and delivery by the
Administrative Agent of amendments to the Security Agreements to exclude from
the granting clauses thereof any
<PAGE>   5
                                                                               5

investment in any Person other than a Subsidiary having an initial value of less
than $2,500,000 if the creation of a security interest with respect thereto
would be prohibited, as otherwise permitted in Subsection 7.9(b) of the Credit
Agreement.

     V.   Conditions Precedent. This Amendment shall become effective as of the
date when each of the conditions precedent set forth below shall have been
satisfied or waived (the date such conditions are fulfilled, the "Amendment
Effective Date"):

          A.  Amendment Documents. The Administrative Agent shall have received
each of the following (together with this Amendment, the "Amendment Documents"):

          1.  This Amendment, executed and delivered by a duly authorized
officer of the Company, the Administrative Agent and the Required Lenders; and

          2.  The Company Pledge Agreement Amendment, executed and delivered by
a duly authorized officer of the Company and the Administrative Agent, together
with an Acknowledgement and Consent, executed and delivered by a duly authorized
officer of PartsAmerica.

          B. Other Documents.

          1.  The Company shall have executed and delivered such documents
(including, without limitation, Uniform Commercial Code financing statements
(the "Financing Statements") and stock powers) and taken such other actions
(including, without limitation, the filing of such Financing Statements and the
delivery of stock certificates) as may have been reasonably requested by or on
behalf of the Administrative Agent, and in the reasonable form or manner as may
have been so requested, to perfect the security interests and liens created by
the Amendment Documents to which the Company is a party or by the Credit
Documents as amended by such Amendment Documents, in each case with the priority
contemplated by such Amendment Documents or the Credit Documents as so amended.

          2.  The Administrative Agent shall have received, to the extent that
it has not theretofore received, a certificate of the Secretary or Assistant
Secretary of the Company as to the incumbency and signature of each of the
officers signing the Amendment Documents to which the Company is a party, and
any other instrument or document delivered by the Company in connection
herewith, together with evidence of the incumbency of such Secretary or
Assistant Secretary.

          C.  No Default or Event of Default. On and as of the Amendment
Effective Date and after giving effect to this Amendment and the transactions
contemplated hereby, no Default or Event of Default shall have occurred and be
continuing.

     VI.  General.
<PAGE>   6
                                                                               6

          A. Representation and Warranties. To induce the Administrative Agent
and the Lenders parties hereto to enter into this Amendment, the Company hereby
represents and warrants to the Administrative Agent and Lenders as of the
Amendment Effective Date that:

          1. Power; Authorization; Enforceable Obligations.

               a. The Company has the corporate power and authority to make and
          deliver each of the Amendment Documents, and to perform the Credit
          Documents, to which it is a party, as amended by the Amendment
          Documents, and has taken all necessary corporate action to authorize
          the execution, delivery and performance of each of the Amendment
          Documents and the performance of such Credit Documents, as so amended.

               b. No consent or authorization of, or filing with, any Person
          (including, without limitation, any Governmental Authority) is
          required in connection with the execution and delivery by the Company
          of the Amendment Documents, or for the performance, validity or
          enforceability against the Company, of any Amendment Document or the
          Credit Document to which it is a party, as amended by the Amendment
          Documents, except for consents, authorizations and filings which have
          been obtained or made and are in full force and effect.

               c. Each Amendment Document has been duly executed and delivered
          on behalf of the Company.

               d. Each Amendment Document and each Credit Document to which the
          Company is a party, as amended by the applicable Amendment Document,
          constitutes a legal, valid and binding obligation of the Company,
          enforceable against the Company in accordance with its terms, except
          as may be limited by applicable bankruptcy, insolvency,
          reorganization, moratorium, or similar laws affecting creditors'
          rights generally and by general principles of equity (regardless of
          whether enforcement is sought in a proceeding in equity or at law).

          2. No Legal Bar. The execution, delivery and performance of the
     Amendment Documents and the performance of the Credit Documents to which
     the Company is a party, as amended by the Amendment Documents, (a) will not
     violate any Requirement of Law or any Contractual Obligation applicable to
     or binding upon the Company or any Subsidiary of the Company or any of
     their respective properties or assets, in any manner which, individually or
     in the aggregate, (i) would have a material adverse effect on the ability
     of the Company or any such Subsidiary to perform its obligations under the
     Credit Documents, as amended by the Amendment Documents, (ii) would give
     rise to any liability on the part of the Administrative Agent or any Lender
     or (iii) would have a material adverse effect on the business, assets,
     condition (financial or otherwise) or results of operations of the Company
     and its Subsidiaries taken as a whole, and (b) will not result in the
     creation or imposition of any Lien on any of its properties or assets
<PAGE>   7
                                                                               7

     pursuant to any Requirement of Law applicable to it, as the case may be, or
     any of its Contractual Obligations, except for the Liens arising under the
     Security Documents.

          3. Representations and Warranties in Credit Documents. The
     representations and warranties made by the Company in each Credit Document
     to which it is a party and herein are true and correct in all material
     respects on and as of this Amendment Effective Date, before and after
     giving effect to this Amendment, as if made on the Amendment Effective
     Date.

          B. Continuing Effect of Credit Documents. Except as expressly amended,
modified and supplemented hereby, the provisions of the Credit Agreement and the
other Credit Documents are and shall remain in full force and effect.

          C. Expenses. The Company agrees to pay or reimburse the Lenders for
all of their reasonable out-of-pocket costs and expenses incurred in connection
with the Amendment and any other documents prepared in connection herewith, and
consummation of the transactions contemplated hereby and thereby, including the
reasonable fees and expenses of counsel to the Lenders.

          D. GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED
AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

          E. Confidentiality. Each of the Administrative Agent and the Lenders
agrees to keep confidential all information contained in the PartsAmerica Term
Sheet provided to it by the Company in accordance with and subject to subsection
11.6(f) of the Credit Agreement.

          F. Counterparts. This Amendment may be executed in any number of
counterparts by the parties hereto, each of which counterparts when so executed
shall be an original, but all counterparts taken together shall constitute one
and the same instrument. This Amendment may be delivered by facsimile
transmission of the relevant signature pages thereof.

<PAGE>   8
                                                                               8

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

                                        CSK AUTO, INC.

                                        By: /s/ Don W. Watson
                                            ------------------------------
                                            Name:  Don W. Watson
                                            Title: Chief Financial Officer
                                                   & Treasurer
<PAGE>   9
                                                                               9

                                                                    CONFIDENTIAL

                                                      ANNEX 1 TO AMENDMENT NO. 1

                      Summary Terms of Proposed Formation
                  of and Investment in PartsAmerica.com, Inc.
                                    and the
        Summary Term Sheet of PartsAmerica.com, Inc. Services Agreement
                For Distribution to CSK Auto, Inc.'s Bank Group

The following is a summary of the Formation and Investment Term Sheet and
Services Agreement Term Sheet related to the formation, investment and on-going
operations of PartsAmerica.com. The following summaries contain certain key
aspects of the terms of CSK Auto, Inc.'s participation in PartsAmerica.com.

Issuer:                  PartsAmerica.com, Inc., a newly formed Delaware
                         corporation ("PartsAmerica" or the "Company").

Strategic Investors:     CSK Auto, Inc. ("CSK") and Advance Stores Company
                         Incorporated ("Advance").

Financial Investors:     CSK, Sequoia Capital ("Sequoia"), Thomas Weisel
                         Partners ("TWP") and Advance Holding Corporation
                         ("AHC") shareholders or their respective affiliates.
                         CSK will invest $2.25 million. AHC shareholders will
                         invest $2.25 million in cash in PartsAmerica. In
                         exchange for cash, the financial investors will receive
                         an aggregate of 10,500,000 shares of Series B
                         Convertible Preferred Shares of PartsAmerica.

Asset Contribution:      CSK will contribute the assets set forth on Schedule A
                         attached hereto and Advance will contribute the assets
                         set forth on Schedule B attached hereto. In exchange
                         for the asset contributions, CSK and Advance shall each
                         receive 10,000,000 Series A Convertible Preferred
                         Shares of PartsAmerica. 10,000,000 shares represents
                         approximately 26.2% of the equity of PartsAmerica
                         (assuming management ownership of 20.0%).

<PAGE>   10
                                                                              10

Series A Convertible    The Series A Convertible Preferred Shares are
Preferred Shares:       convertible on a one for one basis into common shares of
                        the Company at the option of the holders or, in certain
                        circumstances, automatically. Series A Convertible
                        Preferred Shares have an 8% annual cumulative
                        preferential dividend which is payable at the discretion
                        of the board of directors of the Company. All cumulative
                        dividends are waived in the event of a voluntary or
                        automatic conversion.

Cash Investment:        All initial cash investments will be made in Series B
                        Convertible Preferred Shares. Series B Convertible
                        Preferred Shares have similar terms to the Series A
                        Convertible Preferred Shares, but are entitled to a
                        liquidation preference over the Series A Convertible
                        Preferred and Common Shares upon liquidation,
                        dissolution, winding up, or sale (including by merger,
                        consolidation, sale of assets or otherwise) of the
                        Company.

Voting Rights:          The Series A or Series B Convertible Preferred Shares do
                        not have any special voting rights (other than by law),
                        but vote on an as converted basis with the Common
                        Shares. CSK, Advance, and Sequoia have certain board
                        level special approval rights.

Cash Amounts:           The following are the initial cash funding amounts:
<TABLE>
<CAPTION>
                         Entity                Cash           Preferred Shares   %
                                                              (Series B)
                         <S>                   <C>            <C>                <C>
                         CSK:                  $2,250,000     1,125,000          3.0
                         Sequoia Capital(a):   $15,000,000    7,500,000          19.7
                         AHC Shareholders(b):  $2,250,000     1,125,000          3.0
                         TWP:                  $1,500,000     750,000            1.9
</TABLE>

                        (a) $2.5 million funded at closing and $12.5 million
                        funded upon achieving certain conditions.
                        (b) FS Equity Partners IV, Sears Roebuck & Co.,
                        Ripplewood Holdings, and Nicholas F. Taubman or their
                        respective affiliates.
<PAGE>   11
                                                                              11

Initial Ownership Structure:            Assuming approximately 7,625,000 Common
                                        Shares are used for PartsAmerica
                                        management equity grants, the initial
                                        ownership structure on an as converted
                                        basis will be:

                                        CSK:           29.2%
                                        Advance(c):    29.2%
                                        Sequoia:       19.7%
                                        TWP:            1.9%
                                        Management(d): 20.0%

                                        (c) including AHC shareholders
                                        (d) includes certain employees of CSK
                                            and Advance

Restrictions on Transfer:               The Series A Convertible Preferred
                                        Shares, Series B Convertible Preferred
                                        Shares and Common Shares of the Company
                                        have standard restrictions on transfer
                                        including a one-year restriction on most
                                        transfers, right of first refusal on
                                        most transfers, a restriction on the
                                        sale to a competitor of CSK or Advance,
                                        and tag-along rights.

Board Representation:                   Following the purchase of Series B
                                        Convertible Preferred Shares by the
                                        Financial Investors, Initial Board of
                                        Directors of PartsAmerica shall consist
                                        of seven directors: two (2)
                                        representatives designated by each of
                                        CSK and Advance, one representative from
                                        Sequoia, the CEO of the Company, and one
                                        mutually agreed upon representative.

Registration Rights:                    Customary registration rights.

Term of Services Agreement:             Three (3) years with automatic one (1)
                                        year renewals unless any party gives
                                        notice at least 180 days before the
                                        expiration of the then current term.

Supply:                                 CSK and Advance will provide inventory
                                        to PartsAmerica at wholesale prices that
                                        vary depending on delivery method. With
                                        limited exceptions, CSK and Advance will
                                        be the exclusive suppliers of inventory
                                        to PartsAmerica.

Merchandising:                          It is anticipated that PartsAmerica will
                                        carry substantially all of the
                                        merchandise that is carried by CSK and
                                        Advance. PartsAmerica may source
                                        products from third party vendors if CSK
                                        and Advance do not carry the product and
                                        do not wish to carry the product for
                                        PartsAmerica; provided, however,
                                        PartsAmerica may in no event out source
                                        a "Key Product" if CSK or Advance sells
                                        a comparable Key Product. Third party
                                        suppliers need to abide by similar
                                        customer service and fulfillment
                                        criteria as CSK and Advance.
                                        PartsAmerica cannot source from any
                                        direct competitors of CSK or Advance.
<PAGE>   12
                                                                              12

Inventory:               It is PartsAmerica's intent to pursue a virtual
                         inventory business model whereby PartsAmerica will, to
                         the extent possible, use the warehouses, distribution
                         centers, stores, delivery trucks and inventory owned by
                         CSK and Advance. Inventory shall not be differentiated
                         within a warehouse or store.

Delivery Options:        PartsAmerica plans to offer three delivery methods: (1)
                         ship out of warehouse via third party shipper; (2)
                         in-store pick-up in applicable markets; or, (3) same
                         day home delivery in applicable markets.

Wholesale Pricing:       The wholesale price charged to PartsAmerica will vary
                         based on delivery method. CSK believes that the
                         wholesale margin is consistent with the other wholesale
                         arrangements of CSK and its subsidiaries.

Warranty/Returns/        CSK and Advance will handle returns (warranty, cores,
Cores:                   and other returns) for PartsAmerica. In certain
                         instances, CSK and Advance will charge a
                         return-handling fee to PartsAmerica.

Retail Pricing:          PartsAmerica shall determine the retail prices offered
                         on the site for all consumers (business-to-business
                         customers will have prices as determined by CSK or
                         Advance).

Fulfillment:             Generally, PartsAmerica will direct orders to a store
                         or fulfillment center based primarily on the
                         geographic location of the customer.

Settlement:              PartsAmerica will make bi-weekly payments in full to
                         CSK and Advance for all sales, handling fees, and other
                         charges incurred in a given two-week period.

Promotion:               CSK and Advance will promote PartsAmerica as their
                         exclusive e-commerce partner. PartsAmerica shall
                         promote CSK and Advance as its exclusive retail
                         partners. Promotion will include references to
                         PartsAmerica on CSK and Advance's websites and to CSK
                         and Advance on PartsAmerica's website.

Business-to-Business:    PartsAmerica has the option to pursue a
                         business-to-business e-commerce model that would allow
                         PartsAmerica to fulfill internet orders for CSK and
                         Advance for a fee. Pricing for each customer will be
                         determined by CSK or Advance, as applicable.
                         PartsAmerica shall be responsible for enhancements to
                         the site or CD-ROMs to enable the business-to-business
                         program. CSK and Advance shall not be excluded from
                         participating in alternative purchasing solutions.

<PAGE>   13
                                                                              13

Exclusivity:        PartsAmerica will not market any competitor of CSK or
                    Advance on the site and will not sell any auto merchandise
                    in retail brick-and-mortar stores. CSK and Advance will not
                    sell directly or indirectly sell Auto Merchandise through
                    the CSK or Advance website or any other third party website
                    (except for in business-to-business as provided for above).

<PAGE>   14
                                   SCHEDULE A

                              CONTRIBUTION BY CSK

          Asset Contribution                                Cash Contribution
          ------------------                                -----------------

1.  The E-Commerce portion of the CSK Auto.com              $2,250,000
    Web Site and any contracts related thereto
2.  Electronic Parts Catalog License and any
    contracts related thereto
3.  Business Plan to CSK Auto.com and any
    contracts related thereto
4.  Various Domain Names and any contracts
    related thereto
5.  Microsoft CarPoint Agreement and any contracts
    related thereto
6.  Indentifix Database Front-End Software and any
    contracts related thereto

<PAGE>   15
                                   SCHEDULE B

                            CONTRIBUTION BY ADVANCE

                          Asset Contribution
                          ------------------

 1.  PartsAmerica.com URL.
 2.  Royalty free license to the trademark and trade name PartsAmerica -- In
    perpetuity, for use in e-commerce only.
 3.  Copy of Advance's current EPC for use by PartsAmerica on its site.
 4.  Confidential business opportunity dated 9/16/99.
 5.  Presentation of Advance Board of Directors.
 6.  Confidential summary term sheets of online venture dated 10/1/99.
 7.  Confidential internal discussion points of potential joint venture with CSK
     dated 11/11/99.
 8.  Confidential business plan for PartsAmerica.com dated 11/26/99.
 9.  Confidential initial term sheet for PartsAmerica.com dated 11/30/99.
10.  Summary model build-up for PartsAmerica.com dated 12/7/99.
11.  December 22nd consumer study.
12.  Other relevant market studies.
13.  Various domain names.

<PAGE>   16
                                                                  EXECUTION COPY

                          AMENDMENT AND SUPPLEMENT TO
                            COMPANY PLEDGE AGREEMENT

     AMENDMENT AND SUPPLEMENT, dated as of February 17, 2000 (this "Amendment
and Supplement"), to the Company Pledge Agreement, dated as of June 22, 1999 (as
supplemented by the Company Pledge Agreement Supplement, dated as of September
30, 1999, and as the same may be further amended, supplemented or otherwise
modified from time to time, the "Pledge Agreement"), made by CSK AUTO, INC., an
Arizona Corporation (the "Pledgor"), in favor of THE CHASE MANHATTAN BANK, a New
York banking corporation, as administrative agent (in such capacity, the
"Administrative Agent") for the several lenders (the "Lenders") from time to
time parties to the Third Amended and Restated Credit Agreement, dated as of
September 30, 1999 (as amended, supplemented or otherwise modified from time to
time, the "Credit Agreement"), among the Pledgor, the Lenders, the
Administrative Agent, DLJ CAPITAL FUNDING, INC., a Delaware Corporation, as
syndication agent for the Lenders, (in such capacity, the "Syndication Agent")
and LEHMAN COMMERCIAL PAPER INC., a Delaware corporation, as documentation
agent for the Lenders (in such capacity, the "Documentation Agent").

                              W I T N E S S E T H:

     WHEREAS, pursuant to that certain Credit Agreement, the Lenders have made
certain loans to the Pledgor;

     WHEREAS, pursuant to that certain Pledge Agreement, the Pledgor has granted
to the Administrative Agent a first lien on and security interest in all of its
right, title and interest in the Collateral (as defined in the Pledge
Agreement);

     WHEREAS, the Company wishes to enter into a joint venture with Advance
Stores Company Incorporated ("Advance Stores") and certain financial investors
to make capital and other asset contributions (the "PartsAmerica Investment") to
PartsAmerica.com, Inc. ("PartsAmerica"), and to acquire and subscribe to a
portion of the outstanding Capital Stock of PartsAmerica;

     WHEREAS, pursuant to that certain Amendment No. 1, dated as of February 17,
2000, to the Credit Agreement (the "Amendment No. 1") the lenders have consented
to amend and waive certain provisions of the Credit Agreement to allow for the
PartsAmerica Investment; and

     WHEREAS, it is a condition for the Lenders to consent to the Amendment No.
1 that the Pledgor shall have executed and delivered this Amendment and
Supplement to the Administrative Agent for the ratable benefit of the Lenders.

<PAGE>   17
                                                                               2

           NOW, THEREFORE, in consideration of the foregoing premises and for
other good and valuable consideration, the receipt and sufficiency of which is
hereby acknowledged, the parties hereto hereby agree as follows:

      1.    Unless otherwise defined herein, terms defined in the Pledge
Agreement are used herein as therein defined.

      2.    Clause (a) of Section 4 is hereby amended by adding to the end of
such clause immediately prior to the semi-colon the following phrase: "owned by
the Pledgor".

      3.    As additional collateral security for the prompt and complete
payment when due (whether at stated maturity, by acceleration or otherwise) of
the Obligations and in order to induce the Lenders to make their loans and other
extensions of credit under the Credit Agreement and to consent to Amendment No.
1, the Pledgor hereby delivers to the Administrative Agent, for the benefit of
the Lenders, all of the issued and outstanding shares of stock of PartsAmerica,
owned by the Pledgor and listed on Schedule I hereto, together with all stock
certificates or instruments, options, rights or interest of any nature
whatsoever which may be issued or granted by PartsAmerica to the Pledgor in
respect of such stock while the Pledge Agreement, as amended and supplemented
hereby, is in force (the "Additional Pledged Stock"; as used in the Pledge
Agreement as amended and supplemented by this Amendment and Supplement, the
"Pledged Stock" shall be deemed to include the Additional Pledged Stock) and an
undated stock power for each such stock certificate or instrument, duly executed
in blank by the Pledgor, and hereby transfers and grants to the Administrative
Agent, for the ratable benefit of the Lenders, a first priority security
interest in the Pledgor's right, title and interest in the Additional Pledged
Stock and all Proceeds thereof.

      4.    The Pledgor hereby represents and warrants that the representations
and warranties contained in paragraph 4 of the Pledge Agreement are true and
correct on the date of this Amendment and Supplement with references to the
shares of the "Pledged Stock" to include the Additional Pledged Stock, with
references therein to the "Issuers" to include PartsAmerica, and with references
to the "Pledge Agreement" to mean the Pledge Agreement as amended and
supplemented by this Amendment and Supplement.

      5.    This Amendment and Supplement forms a part of the Pledge Agreement
and is subject to the terms thereof. Schedule I to the Pledge Agreement shall
hereby be deemed to include each item listed on Schedule I to this Amendment and
Supplement.

      6.    THIS AMENDMENT AND SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED
AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

      7.    This Amendment and Supplement may be executed in any number of
counterparts by the parties hereto, each of which counterparts when so executed
shall be an original, but all counterparts taken together shall constitute one
and the same instrument. This Amendment and Supplement may be delivered by
facsimile transmission of the relevant signature pages thereof.

<PAGE>   18
                                                                               3

     IN WITNESS WHEREOF, the undersigned have caused this Amendment and
Supplement to be duly executed by their authorized representatives as of the
date first above written.

                                 CSK AUTO, INC.

                                 By: /s/ Don W. Watson
                                     ---------------------------
                                     Name: Don W. Watson
                                     Title: Chief Financial Officer & Treasurer

                                 THE CHASE MANHATTAN BANK, as
                                 Administrative Agent

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

<PAGE>   19
                                                                               4

          IN WITNESS WHEREOF, the undersigned have caused this Amendment and
Supplement to be duly executed by their authorized representatives as of the
date first above written.

                                   CSK AUTO, INC.

                                   By:
                                          ----------------------------------

                                          Name:
                                          Title:

                                   THE CHASE MANHATTAN BANK, as Administrative
                                   Agent

                                   By:    /s/ Neil R. Boylan
                                          ----------------------------------

                                          Name:    Neil R. Boylan
                                          Title:   Managing Director

<PAGE>   20
                                   Schedule I

                    DESCRIPTION OF ADDITIONAL PLEDGED STOCK

<TABLE>
<CAPTION>
                                              Stock
Issuer                   Class of Stock       Certificate No.     No. of Shares
------                   --------------       ---------------     -------------
<S>                      <C>                  <C>                 <C>
PartsAmerica.com, Inc.   8% Series A                              10,000,000
                         Convertible
                         Preferred Shares

                         8% Series B
                         Convertible                               1,250,000
                         Preferred Shares
</TABLE>
<PAGE>   21
                                                                  EXECUTION COPY

                        AMENDMENT TO SECURITY AGREEMENTS

     AMENDMENT, dated as of February 17, 2000 (this "AMENDMENT"), to (1) the
Company Security Agreement, dated as of October 30, 1996, made by CSK AUTO,
INC., an Arizona Corporation ("CSK" or the "COMPANY"), (2) the Subsidiary
Security Agreement, dated as of September 30, 1999, made by the signatories
thereto (each a "GRANTOR"), both in favor of THE CHASE MANHATTAN BANK, a New
York banking corporation, (the "COMPANY SECURITY AGREEMENT" and the "SUBSIDIARY
SECURITY AGREEMENT" collectively, the "SECURITY AGREEMENTS") as administrative
agent (in such capacity, the "ADMINISTRATIVE AGENT") for the several lenders
(the "LENDERS") from time to time parties to the Third Amended and Restated
Credit Agreement, dated as of September 30, 1999 (as amended, supplemented or
otherwise modified from time to time, the "CREDIT AGREEMENT"), among the
Company, the Lenders, the Administrative Agent, DLJ CAPITAL FUNDING, INC., a
Delaware Corporation, as syndication agent for the Lenders, (in such capacity,
the "Syndication Agent") and LEHMAN COMMERCIAL PAPER, INC., a Delaware
corporation, as documentation agent for the Lenders (in such capacity, the
"DOCUMENTATION AGENT").

                               W I T N E S S E T H:

     WHEREAS, pursuant to that certain Credit Agreement, the Lenders have made
certain loans to the Company;

     WHEREAS, pursuant to the Security Agreements, the Grantors have granted to
the Administrative Agent for the ratable benefit of the Lenders a security
interest in all of its right, title and interest in the Collateral (as defined
in the Security Agreements);

     WHEREAS, the Company wishes to enter into a joint venture with Advance
Stores Company Incorporated ("ADVANCE STORES") and certain financial investors
to make capital and other asset contributions (the "PARTSAMERICA INVESTMENT")
to PartsAmerica.com, Inc. ("PARTSAMERICA"), and to acquire and subscribe to a
portion of the outstanding Capital Stock of PartsAmerica;

     WHEREAS, pursuant to that certain Amendment No. 1, dated as of February
17, 2000, to the Credit Agreement (the "AMENDMENT NO. 1") the Lenders have
consented to amend and waive certain provisions of the Credit Agreement to
allow for the PartsAmerica Investment; and

     WHEREAS, it is a condition for the Lenders to consent to the Amendment No.
1 that the Company shall have executed and delivered this Amendment and
Supplement to the Administrative Agent for the ratable benefit of the Lenders.

     NOW, THEREFORE, in consideration of the foregoing premises and for other
good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto hereby agree as follows:

<PAGE>   22
                                                                               2

     1.  Unless otherwise defined herein, terms defined in the Credit Agreement
are used herein as therein defined.

     2.  Amendments to Section 2 (Grant of Security Interest). Section 2 of the
Company Security Agreement and Section 2 of the Subsidiary Security Agreement
are hereby amended by deleting said subsections in their entirety and by
substituting in lieu thereof the following:

     "As collateral security for the prompt and complete payment and performance
     when due (whether at the stated maturity, by acceleration or otherwise) of
     the Obligations, each Grantor hereby grants to the Administrative Agent for
     the ratable benefit of the Lenders a security interest in all of the
     following property now owned or at any time hereafter acquired by such
     Grantor or in which such Grantor now has or at any time in the future may
     acquire any right, title or interest, excluding, however, any investment in
     any Person other than a Subsidiary having an initial value of less than
     $2,500,000 if the creation of a security interest with respect thereto
     would be prohibited, as otherwise permitted in Subsection 7.9(b) of the
     Credit Agreement (collectively, the "Collateral"):

                      (i)  all Accounts;

                     (ii)  all Chattel Paper;

                    (iii)  all Contracts;

                     (iv)  all Copyrights;

                      (v)  all Copyright Licenses;

                     (vi)  all Documents;

                    (vii)  all Equipment;

                   (viii)  all General Intangibles;

                     (ix)  all Instruments;

                      (x)  all Inventory;

                     (xi)  all Patents;

                    (xii)  all Patent Licenses;

                   (xiii)  all Trademarks;

                    (xiv)  all Trademark Licenses;

<PAGE>   23
                                                                               3

                  (xv)  all other Goods and personal property of such Grantor,
          whether tangible or intangible and whether now or hereafter owned by
          such Grantor, and wherever located; and

                  (xvi)  to the extent not otherwise included, all Proceeds and
          products of any and all of the foregoing".

     3.  The Company hereby represents and warrants that the representations and
warranties contained in paragraph 2 of the Security Agreements are true and
correct on the date of this Amendment with references to "Collateral" as used in
the Security Agreements as amended and supplemented by this Amendment shall be
deemed to exclude any investment in any Person other than a Subsidiary having an
initial value of less than $2,500,000 if the creation of a security interest
with respect thereto would be prohibited, as otherwise permitted in Subsection
7.9(b) of the Credit Agreement.

     4.  This Amendment forms a part of the Security Agreements and is subject
to the terms thereof.

     5.  THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

     6.  This Amendment may be executed in any number of counterparts by the
parties hereto, each of which counterparts when so executed shall be an
original, but all counterparts taken together shall constitute one and the same
instrument. This Amendment may be delivered by facsimile transmission of the
relevant signature pages thereof.

<PAGE>   24
                                                                               4

     IN WITNESS WHEREOF, the undersigned have caused this Amendment to be duly
executed by their authorized representatives as of the date first above written.

                                  CSK AUTO, INC.

                                  By:  /s/ Don W. Watson
                                     ---------------------------------------
                                     Name:  Don W. Watson
                                     Title: Chief Financial Officer & Treasurer

                                  THE CHASE MANHATTAN BANK, as
                                  Administrative Agent

                                  By: /s/ Neil R. Boylan
                                     ----------------------------------------
                                     Name:  Neil R. Boylan
                                     Title: Managing Director

<PAGE>   25
                               THE CHASE MANHATTAN BANK, as
                               Administrative Agent, Issuing Lender and a Lender

                               By:  /s/ Neil R. Boylan
                                  ----------------------------------------------
                                  Name:  Neil R. Boylan
                                  Title: Managing Director

                               ALLIANCE INVESTMENTS LIMITED

                               By:  /s/ Illegible
                                  ----------------------------------------------
                                  Name:  Illegible
                                  Title: Authorized Signatory

                               BANK ONE, NA (CHICAGO-MAIN OFFICE)

                               By:  /s/ Catherine A. Muszynski
                                  ----------------------------------------------
                                  Name:  Catherine A. Muszynski
                                  Title: Vice President

                               BANK POLSKA KASA OPIEKI S.A. GROUP
                               PEKAO S.A.

                               By:  /s/ Hussein B. El-Tawil
                                  ----------------------------------------------
                                  Name:  Hussein B. El-Tawil
                                  Title: Vice President

                               DLJ CAPITAL FUNDING, INCORPORATED
                               as Syndication Agent and a Lender

                               By:  /s/ Eric Swanson
                                  ----------------------------------------------
                                  Name:  Eric Swanson
                                  Title: Managing Director

                               EATON VANCE INSTITUTIONAL SENIOR LOAN FUND
                               BY: EATON VANCE MANAGEMENT
                               AS INVESTMENT ADVISOR

                               By:  /s/ Scott H. Page
                                  ----------------------------------------------
                                  Name:  Scott H. Page
                                  Title: Vice President

                               EATON VANCE SENIOR INCOME TRUST
                               BY: EATON VANCE MANAGEMENT
                               AS INVESTMENT ADVISOR

                               By:  /s/ Scott H. Page
                                  ----------------------------------------------
                                  Name:  Scott H. Page
                                  Title: Vice President
<PAGE>   26
                               ELT LTD.

                               By:  /s/ Kelly C. Walker
                                  ----------------------------------------------
                                  Name:  Kelly C. Walker
                                  Title: Authorized Agent

                               FIRST UNION NATIONAL BANK

                               By:  /s/ Robert A. Brown
                                  ----------------------------------------------
                                  Name:  Robert A. Brown
                                  Title: Vice President

                               FIVE FINANCE CORP.

                               By:  [ILLEGIBLE]
                                  ----------------------------------------------
                                  Name:
                                  Title:

                               MARTIN DAVEY, V.P.
                               Citibank Global Asset Management
                               599 Lexington Ave./26th Flr./Zone 10
                               Ph: (212) 559-4205

                               IKB DEUTSCHE INDUSTRIEBANK AG,
                               LUXEMBOURG BRANCH

                               By:  /s/ Edwin Brecht
                                  ----------------------------------------------
                                  Name:  Edwin Brecht
                                  Title: Executive Director

                               By:  /s/ Manfred Ziwey
                                  ----------------------------------------------
                                  Name:  Manfred Ziwey
                                  Title: Director

                               INDOSUEZ CAPITAL FUNDING IIA, LIMITED
                               BY: INDOSUEZ CAPITAL, as Portfolio Advisor

                               By:  /s/ Melissa Marano
                                  ----------------------------------------------
                                  Name:  Melissa Marano
                                  Title: Vice President

                               INDOSUEZ CAPITAL FUNDING IV, L.P.
                               BY: INDOSUEZ CAPITAL, as Portfolio Advisor

                               By:  /s/ Melissa Marano
                                  ----------------------------------------------
                                  Name:  Melissa Marano
                                  Title: Vice President

                               THE INDUSTRIAL BANK OF JAPAN, LIMITED

                               By:  /s/ Vicente L. Timiraos
                                  ----------------------------------------------
                                  Name:  Vicente L. Timiraos
                                  Title: Joint General Manager
<PAGE>   27
                               K2H CYPRESSTREE-1 LLC

                               By:  /s/ Virginia Conway
                                  ----------------------------------------------
                                  Name:  Virginia Conway
                                  Title: Authorized Agent

                               LEHMAN COMMERCIAL PAPER, INC.
                               as Documentation Agent and a Lender

                               By:  /s/ Michele Swanson
                                  ----------------------------------------------
                                  Name:  Michele Swanson
                                  Title: Authorized Signatory

                               LEHMAN SYNDICATED LOANS, INC.
                               as Documentation Agent and a Lender

                               By:  /s/ Michele Swanson
                                  ----------------------------------------------
                                  Name:  Michele Swanson
                                  Title: Authorized Signatory

                               MITSUBISHI TRUST & BANKING
                               CORPORATION

                               By:  /s/ TOSHIHIRO HAYASHI
                                  ----------------------------------------------
                                  Name:  TOSHIHIRO HAYASHI
                                  Title: Senior Vice President

                               NATIONAL BANK OF CANADA

                               By:  /s/ David L. Mortensen
                                  ----------------------------------------------
                                  Name:  David L. Mortensen
                                  Title: AVP

                               OASIS COLLATERALIZED HIGH INCOME
                               PORTFOLIOS -1, LTD.

                               By:  INVESCO Senior Secured Management,
                                    Inc., as Sub-Advisor

                                    By:  /s/ Gregory Stoeckle
                                       -----------------------------------------
                                       Name:  Gregory Stoeckle
                                       Title: Authorized Signatory

                               OSPREY INVESTMENTS PORTFOLIO

                               By:  /s/ Hans L. Christensen
                                  ----------------------------------------------
                                  Name:  Hans L. Christensen
                                  Title: Vice President
<PAGE>   28
                               OXFORD STRATEGIC
                               INCOME FUND
                               By: Eaton Vance Management
                                   as Investment Advisor

                               By:  /s/  Scott H. Page
                                  ----------------------------------------------
                                  Name:  Scott H. Page
                                  Title: Vice President

                               SANWA BANK CALIFORNIA

                               By:  /s/  John F. King
                                  ----------------------------------------------
                                  Name:  John F. King
                                  Title: AVP

                               SENIOR DEBT PORTFOLIO
                               By: BOSTON MANAGEMENT AND
                               RESEARCH, as Investment Advisor

                               By:  /s/  Scott H. Page
                                  ----------------------------------------------
                                  Name:  Scott H. Page
                                  Title: Vice President

                               SEQUILS-PILGRIM I LTD.
                               By: PILGRIM INVESTMENTS, INC. as its
                               Investment Manager

                               By:  /s/  Robert L. Wilson
                                  ----------------------------------------------
                                  Name:  Robert L. Wilson
                                  Title: Vice President

                               PILGRIM CLO 1999-1 LTD.

                               By:  /s/  Robert L. Wilson
                                  ----------------------------------------------
                                  Name:  Robert L. Wilson
                                  Title: Vice President

                               PILGRIM PRIME RATE TRUST
                               BY: PILGRIM INVESTMENTS, INC., as its
                               Investment Manager

                               By:  /s/  Robert L. Wilson
                                  ----------------------------------------------
                                  Name:  Robert L. Wilson
                                  Title: Vice President

                               ML CLO XII PILGRIM AMERICA (CAYMAN)
                               LTD.
                               By: PILGRIM INVESTMENTS, INC. as its
                               Investment Manager

                               By:  /s/  Robert L. Wilson
                                  ----------------------------------------------
                                  Name:  Robert L. Wilson
                                  Title: Vice President

                               STANFIELD CLO, LTD.
                               By: STANFIELD CAPITAL PARTNERS LLC, as
                               its Collateral Manager

                               By:  /s/  Christopher A. Bondy
                                  ----------------------------------------------
                                  Name:  Christopher A. Bondy
                                  Title: Partner

<PAGE>   29
                                  STRATA FUNDING LTD.

                                  By:  INVESCO Senior Secured Management, Inc.,
                                       as Sub-Managing Agent

                                  By:  Gregory Stoeckle
                                       --------------------------------------
                                  Name: Gregory Stoeckle
                                  Title: Authorized Signature

                                  STRATEGIC MANAGED LOAN PORTFOLIO

                                  By:  Hans T. Christensen
                                       --------------------------------------
                                  Name: Hans T. Christensen
                                  Title: Vice President

                                  THE SUMITOMO TRUST & BANKING CO., LTD.,
                                  New York Branch

                                  By: Stephen A. Stratico
                                      --------------------------------------
                                  Name: Stephen A. Stratico
                                  Title: Vice President

                                  TRANSAMERICA BUSINESS CREDIT CORP.

                                  By: Perry Vavoules
                                      --------------------------------------
                                  Name: Perry Vavoules
                                  Title: Senior Vice President

                                  VAN KAMPEN CLO II, LIMITED
                                  By: VAN KAMPEN MANAGEMENT INC., as its
                                  Collateral Manager

                                  By: Darvin D. Pierce
                                      --------------------------------------
                                  Name: Darvin D. Pierce
                                  Title: Vice President

                                  VAN KAMPEN CLO I, LIMITED
                                  By: VAN KAMPEN MANAGEMENT INC., as its
                                  Collateral Manager

                                  By: Darvin D. Pierce
                                       --------------------------------------
                                  Name: Darvin D. Pierce
                                  Title: Vice President

                                  WELLS FARGO BANK, N.A.

                                  By: Michael Real
                                       --------------------------------------
                                  Name: Michael Real
                                  Title: Vice President<PAGE>   1
                                                                Exhibit - 4.01.2

                                                                  EXECUTION COPY

                                AMENDMENT NO. 2

     AMENDMENT NO. 2, dated as of December 4, 2000 (this "Amendment"), to the
Third Amended and Restated Credit Agreement, dated as of September 30, 1999 (as
amended by Amendment No. 1, dated as of February 17, 2000, and as further
amended, supplemented or otherwise modified from time to time, the "Credit
Agreement"), among CSK AUTO, INC. (the "Company"), the several lenders from time
to time parties to the Credit Agreement (the "Lenders"), THE CHASE MANHATTAN
BANK, a New York banking corporation, as administrative agent for the Lenders
(in such capacity, the "Administrative Agent"), DLJ CAPITAL FUNDING, INC., a
Delaware corporation, as syndication agent for the Lenders (the "Syndication
Agent") and LEHMAN COMMERCIAL PAPER INC., a Delaware corporation, as
documentation agent for the Lenders (in such capacity, the "Documentation
Agent").

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

     WHEREAS, the Company has requested that the Lenders consent to amend
certain provisions of the Credit Agreement; and

     WHEREAS, the Lenders are willing to consent to the requested amendment on
and subject to the terms and conditions contained herein.

     NOW, THEREFORE, in consideration of the foregoing premises and for other
good and valuable consideration the receipt and sufficiency of which is hereby
acknowledged, the parties hereto agree as follows:

     1.  Definitions. Unless otherwise defined herein, terms in the Credit
Agreement are used herein as therein defined.

     2.  Amendments to the Credit Agreement.

     (a) Amendment to Section 1.1 (Defined Terms).(i) Section 1.1 of the Credit
Agreement is hereby amended by adding the following new definitions in the
appropriate alphabetical order:

         "First Delivery Date": the date on which the Company shall have
delivered to the Administrative Agent and the Lenders its financial statements
referred to in Section 7.1(b) for the first quarter of Fiscal Year 2001.

         "Fiscal Year": the fiscal year of the Company ending on the Sunday
closest to January 31 of the following year.

         "Pricing Grid A": the pricing grid attached hereto as Annex A-1.

         "Pricing Grid B": the pricing grid attached hereto as Annex A-2.

         "Second Delivery Date": February 5, 2002.

         "Term Loan Lenders": the collective reference to each Tranche B Lender,
Tranche B-1 Lender and Tranche B-2 Lender.

<PAGE>   2
                                                                               2

               (ii) Section 1.1 of the Credit Agreement is hereby further
amended by deleting the words "October 31, 2001" in the definition of "Revolving
Credit Termination Date" and replacing them with the words "October 31, 2002."

               (iii) Section 1.1 of the Credit Agreement is hereby further
amended by deleting the definitions of "Applicable Margin" and "Commitment Fee
Rate" and substituting in lieu therefor the following new definitions:

                    "APPLICABLE MARGIN": (a) From the Closing Date until (but
     excluding) the First Delivery Date, for each Loan, 3.00% for Eurodollar
     Rate Loans and 2.00% for Alternate Base Rate Loans.

                    (b) From and after the First Delivery Date, for each Type of
     Loan, the rate per annum determined pursuant to Pricing Grid A.

                    (c) From and after the Second Delivery Date, for each Type
     of Loan, the rate per annum determined pursuant to Pricing Grid B.

                    "COMMITMENT FEE RATE": (a) From the Closing Date until (but
     excluding) the First Delivery Date, 0.5%, (b) from and after the First
     Delivery Date, the rate per annum determined pursuant to Pricing Grid A and
     (c) from and after the Second Delivery Date, the rate per annum determined
     pursuant to Pricing Grid B.

               (iv) Section 1.1 of the Credit Agreement is hereby further
amended by deleting the definitions of "Delivery Date", "Pricing Grid" and
"Tranche B-2 Delivery Date".

          (b)  AMENDMENT TO SECTION 8.6 (LIMITATION ON INVESTMENTS, LOANS AND
ADVANCES). Section 8.6(h) is hereby amended by deleting it in its entirety and
substituting in lieu therefor the following new section:

          "(h) the Company and its Subsidiaries may make acquisitions of
     companies engaged primarily in businesses similar to the businesses in
     which the Company and its Subsidiaries are engaged to the extent that the
     amount expended to make such acquisitions is permitted pursuant to
     subsection 8.7(a) or (d); and"

          (c)  AMENDMENT TO SECTION 8.7 (CAPITAL EXPENDITURES). Section 8.7 is
hereby amended as follows:

               (i)  The lead-in sentence in Section 8.7 is hereby amended by
deleting in its entirety such sentence and substituting in lieu therefor the
following words:

          "Unless otherwise consented to by the Supermajority Lenders, make or
     commit to make any Capital Expenditures, except that the Company and its
     Subsidiaries may make or commit to make Capital Expenditures".

<PAGE>   3
                                                                               3

      (ii)  Section 8.7(b) is hereby amended by deleting such section in its
entirety and substituting in lieu therefor the words "[Reserved]".

      (iii) Section 8.7(d) is hereby amended by (A) deleting the table in such
section and substituting in lieu therefor the following:

          Fiscal Year                   Base Amount
          -----------                   -----------
          1998                          $30,000,000
          1999                          $50,000,000
          2000                          $30,000,000
          2001                          $30,000,000
          2002                          $30,000,000
          2003                          $30,000,000

and (B) deleting the word "$15,000,000" in the proviso thereto and replacing it
with the word "$5,000,000".

      (d) Amendment to Section 8.9 (Debt to EBITDA). Section 8.9(a) of the
Credit Agreement is hereby amended by deleting the table therein and
substituting in lieu therefor the following new table:

          Fiscal Year              Fiscal Quarter                  Ratio
          -----------              --------------                  -----
          1999                         Second                    4.50 to 1
                                        Third                    4.50 to 1
                                       Fourth                    4.50 to 1
          2000                          First                    4.50 to 1
                                       Second                    4.00 to 1
                                        Third                    4.00 to 1
                                       Fourth                    4.25 to 1
          2001                          First                    4.25 to 1
                                       Second                    4.00 to 1
                                        Third                    4.00 to 1
                         Fourth and each fiscal quarter
                                   thereafter                    3.75 to 1

      (e) Amendment to Section 8.10 (Interest Coverage). Section 8.10 of the
Credit Agreement is hereby amended by deleting the table therein and
substituting in lieu therefor the following new table:

                                                                  Interest
          Fiscal Year              Fiscal Quarter              Coverage Ratio
          -----------              --------------              --------------
          1999                         Second                    2.25 to 1
                                        Third                    2.25 to 1
                                       Fourth                    2.75 to 1
          2000                          First                    2.75 to 1
                                       Second                    2.75 to 1
                                        Third                    2.75 to 1
                                       Fourth                    2.25 to 1
          2001                          First                    2.25 to 1
                                       Second                    2.35 to 1
                                        Third                    2.50 to 1
<PAGE>   4
                                                                               4

                         Fourth and each fiscal quarter
                                   thereafter                  2.75 to 1

          (f) Amendment to Section 8.13 (Prepayments and Amendments of
Permanent Subordinated Debt). Section 8.13 is hereby amended by deleting it in
its entirety and substituting in lieu therefor the following new section:

     "(a) Optionally prepay, optionally retire, optionally redeem, optionally
     purchase, optionally defease, optionally exchange, or make any mandatory
     prepayment or any mandatory repurchase of any Permanent Subordinated Debt
     (other than the refinancing of the Permanent Subordinated Debt contemplated
     in the definition thereof) or pay any interest on the Permanent
     Subordinated Debt in cash if such interest may be paid by the issuance of
     additional Permanent Subordinated Debt or (b) amend, supplement or
     otherwise modify any documentation governing any Permanent Subordinated
     Debt (other than (i) amendments to such Permanent Subordinated Debt which
     reduce the interest rate or extend the maturity thereof and (ii) waivers of
     compliance by the Company with any of the terms or conditions of such
     Permanent Subordinated Debt (except those terms or conditions which by
     their terms are for the benefit of the Lenders))."

          (g) Amendment to Annex A. Annex A to the Credit Agreement is hereby
amended by deleting it in its entirety and replacing it with Annexes A-1 and A-2
attached hereto.

          (h) Amendment to Schedule 5.12. Schedule 5.12 to the Credit Agreement
is hereby amended by deleting it in its entirety and replacing it with Schedule
5.12 attached hereto.

          3.  Representations and Warranties.  To induce the Administrative
Agent and the Lenders parties thereto to enter into this Amendment, the Company
hereby represents and warrants to the Administrative Agent and the Lenders as
of the Amendment Effective Date that:

          (a) The Company has the corporate power and authority to make and
     deliver this Amendment, and to perform the Credit Documents to which it is
     a party, as amended by this Amendment, and has taken all necessary
     corporate action to authorize the execution, delivery and performance of
     this Amendment and the performance of the Credit Documents, as so amended.

          (b) No consent or authorization of, or filing with, any Person
     (including, without limitation, any Governmental Authority) is required in
     connection with the execution and delivery of the Company of this
     Amendment, or for the performance, validity or enforceability against the
     Company, of this Amendment or the Credit Documents to which it is a party,
     as amended by this Amendment, except for consents, authorizations and
     filings which have been obtained or made and are in full force and effect.

          (c) This Amendment has been duly executed and delivered by the
     Company.

          (d) This Amendment and each Credit Document to which the Company is a
     party, as amended by this Amendment, constitutes a legal, valid and binding
     obligation of the Company, enforceable against the Company in accordance
     with its terms, except as may be limited by applicable bankruptcy,
     insolvency, reorganization, moratorium or similar laws affecting creditors'
     rights generally and by principals of equity (regardless of whether
     enforcement is sought in a proceeding in equity or at law).

          (e) The execution, delivery and performance of this Amendment and the
     performance of the Credit Documents to which the Company is a party, as
     amended by this Amendment, (i) will

<PAGE>   5
                                                                               5

     not violate any Requirement of Law or any Contractual Obligation applicable
     to or binding upon the Company or any Subsidiary of the Company or any of
     their respective properties or assets, in a manner which, individually or
     in the aggregate, (x) would have a material adverse effect on the ability
     of the Company or such Subsidiary to perform its obligations under the
     Credit Documents, as amended by this Amendment, (y) would give rise to any
     liability on the part of the Administrative Agent or any Lender or (z)
     would have a material adverse effect on the business, assets, condition
     (financial or otherwise) or results of operations of the Company and its
     Subsidiaries, taken as a whole, and (ii) will not result in the creation or
     imposition of any Lien on any of its properties or assets pursuant to any
     Requirement of Law applicable to it, as the case may be, or any of its
     Contractual Obligations, except for Liens arising under the Security
     Documents.

          (f)  The representations and warranties made by the Company in each
     Credit Document to which it is a party and herein are true and correct in
     all material respects on and as of the Amendment Effective Date, before and
     after giving effect to this Amendment, as if made on the Amendment
     Effective Date.

          4.   Conditions Precedent. This Amendment shall become effective as
of the date (the "Amendment Effective Date") when each of the conditions
precedent set forth below shall have been satisfied or waived:

          (a)  the Administrative Agent shall have received (i) this Amendment,
     executed and delivered by a duly authorized officer of the Company, the
     Administrative Agent and each Revolving Credit Lender and the Required
     Lenders (which may include the Revolving Credit Lenders) and (ii) each
     party to a Guarantee shall have acknowledged and agreed to this Amendment;

          (b)  the Administrative Agent shall have received for the benefit of
     Lenders, the fees set forth in the certain Amendment Fee Letter, dated as
     of November 15, 2000, among the Company, Chase Securities Inc. and the
     Administrative Agent; and

          (c)  on and as of the Amendment Effective Date and after giving effect
     to this Amendment and the transactions contemplated hereby, no Default or
     Event of Default shall have occurred and be continuing.

          5.   Determination of Fees and Interest. Commitment Fees and interest
accrued on the Loans prior to the Amendment Effective Date shall be determined
based on the Commitment Fee Rate and the Applicable Margin, as applicable, in
effect immediately prior to the Amendment Effective Date in accordance with the
terms of the Credit Agreement prior to giving effect to this Amendment.
Commitment Fees and interest accrued on the Loans on and after the Amendment
Effective Date shall be determined based on the Commitment Fee Rate and the
Applicable Margin, as applicable, in effect in accordance with the terms of the
Credit Agreement as amended by this Amendment.

          6.   Continuing Effect of Credit Documents. Except as expressly
amended, modified and supplemented hereby, the provisions of the Credit
Agreement and the other Credit Documents are and shall remain in full force and
effect in accordance with their respective terms.

          7.   Expenses. The Company agrees to pay or reimburse the Lenders for
all of their reasonable out-of-pocket costs and expenses incurred in connection
with this Amendment and any other documents prepared in connection herewith,
and consummation of the transactions contemplated hereby and thereby, including
the reasonable fees and expenses of counsel to the Lenders.

<PAGE>   6
                                                                               6

          8.   GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED
AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

          9.   Counterparts; Binding Effect. This Amendment may be executed in
any number of counterparts by the parties hereto, each of which counterparts
when so executed shall be an original, but all counterparts taken together shall
constitute one and the same instrument. This Amendment may be delivered by
facsimile transmission of the relevant signature pages thereof. The execution
and delivery of this Amendment by any Lender shall be binding upon each of its
successors and assigns (including Transferees of its commitments and Loans in
whole or in part prior to effectiveness hereof) and binding in respect of all of
its commitments and Loans, including any acquired subsequent to its execution
and delivery hereof and prior to the effectiveness hereof.
<PAGE>   7
                                                                               7

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

                                        CSK AUTO, INC.

                                        By: /s/ Don W. Watson
                                           -------------------------------------
                                           Name:  Don W. Watson
                                           Title: CFO

                                        THE CHASE MANHATTAN BANK, as
                                         Administrative Agent, Issuing Bank
                                         and a Lender

                                        By: /s/ Neil R. Boylan
                                           -------------------------------------
                                           Name: Neil R. Boylan
                                           Title: Managing Director
<PAGE>   8
                                                                       ANNEX A-1

                                 PRICING GRID A

<TABLE>
<CAPTION>
                                            Alternate Base           Eurodollar Rate
Leverage Ratio                                Rate Loans                  Loans               Commitment Fee Rate
-----------------------------------------------------------------------------------------------------------------------
<S>                                           <C>                      <C>                         <C>
greater than 4.5 to 1                          2.50%                    3.50%                        0.50%
less than or equal to 4.5 to 1                 2.25%                    3.25%                        0.50%
less than or equal to 4.0 to 1                 2.00%                    3.00%                        0.50%
less than or equal to 3.5 to 1                 1.75%                    2.75%                        0.50%
less than or equal to 3.0 to 1                 1.50%                    2.50%                       0.375%
</TABLE>

Changes in the Applicable Margin or the Commitment Fee Rate resulting from
changes in the Leverage Ratio shall become effective on the date (the
"Adjustment Date") on which financial statements are delivered to the
Administrative Agent pursuant to subsection 7.1(a) or (b) (but in any event not
later than the 50th day after the end of each of the first three quarterly
periods of each fiscal year or the 95th day after the end of each fiscal year,
as the case may be) and (b) and shall remain in effect until the next change to
be effected pursuant to this paragraph. If any financial statements referred to
above are not delivered within the time periods specified subsection 7.1, then,
until such financial statements are delivered, the Leverage Ratio shall be
deemed to be the same as with respect to the immediately preceding period;
provided, however, that if such financial statements, when actually delivered,
would have required an increase in the Applicable Margin or Commitment Fee Rate
over the Applicable Margin or Commitment Fee Rate, as the case may be, in effect
immediately prior to the date such financial statements were due, the Company
shall promptly pay to the Lenders and the Administrative Agent any additional
amounts of interest or fees which would have been payable on any previous
Interest Payment Date had such higher Applicable Margin or Commitment Fee Rate,
as the case may be, been in effect from the date such financial statements were
required to be delivered.
<PAGE>   9
                                                                       ANNEX A-2

                                 PRICING GRID B

<TABLE>
<CAPTION>
                                            Alternate Base           Eurodollar Rate
Leverage Ratio                                Rate Loans                  Loans               Commitment Fee Rate
-----------------------------------------------------------------------------------------------------------------------
<S>                                           <C>                      <C>                         <C>
greater than 4.5 to 1                          2.75%                    3.75%                        0.50%
less than or equal to 4.5 to 1                 2.50%                    3.50%                        0.50%
less than or equal to 4.0 to 1                 2.25%                    3.25%                        0.50%
less than or equal to 3.5 to 1                 2.00%                    3.00%                        0.50%
less than or equal to 3.0 to 1                 1.75%                    2.75%                       0.375%
</TABLE>

Changes in the Applicable Margin or the Commitment Fee Rate resulting from
changes in the Leverage Ratio shall become effective on the date (the
"Adjustment Date") on which financial statements are delivered to the
Administrative Agent pursuant to subsection 7.1(a) or (b)(but in any event not
later than the 50th day after the end of each of the fist three quarterly
periods of each fiscal year or the 95th day after the end of each fiscal year,
as the case may be) and (b) and shall remain in effect until the next change to
be effected pursuant to this paragraph; provided that for the period from the
Second Delivery Date until the delivery of financial statements pursuant to
subsection 7.1(a) for the Fiscal Year 2001, the Leverage Ratio shall be
determined based on the financial statements pursuant to subsection 7.1(b) for
the third quarter of Fiscal Year 2001. If any financial statements referred to
above are not delivered within the time periods specified in subsection 7.1,
then, until such financial statements are delivered, the Leverage Ratio shall be
deemed to be the same as with respect to the immediately preceding period;
provided, however, that if such financial statements, when actually delivered,
would have required an increase in the Applicable Margin or Commitment Fee Rate
over the Applicable Margin or Commitment Fee Rate, as the case may be, in effect
immediately prior to the date such financial statements were due, the Company
shall promptly pay to the Lenders and the Administrative Agent any additional
amounts of interest or fees which would have been payable on any previous
Interest Payment Date had such higher Applicable Margin or Commitment Fee Rate,
as the case may be, been in effect from the date such financial statements were
required to be delivered.
<PAGE>   10
                                 Schedule 5.12

                                  SUBSIDIARIES

A.   DOMESTIC SUBSIDIARIES*

     1.   CSKAUTO.COM, Inc., a Delaware corporation
     2.   Automotive Information Systems, Inc., a Minnesota corporation

B.   FOREIGN SUBSIDIARIES

-------------------------
*    Al's and Grand Auto Supply was merged into the Company on February 17,
     2000.
<PAGE>   11
                          ACKNOWLEDGEMENT AND CONSENT

          Each of the Undersigned does hereby acknowledge and consent to the
foregoing Amendment. Each of the Undersigned does hereby confirm and agree that,
after giving effect to such Amendment, its Guarantee is and shall continue to be
in full force and effect and is hereby confirmed and ratified in all respects.

                                        CSK AUTO CORPORATION

                                        By: /s/ Don W. Watson
                                           -------------------------------------
                                           Name:  Don W. Watson
                                           Title: CFO

                                        CSKAUTO.COM, INC.
                                        AUTOMOTIVE INFORMATION SYSTEMS, INC.

                                        By: /s/ Don W. Watson
                                           -------------------------------------
                                           Name:  Don W. Watson
                                           Title: CFO

<PAGE>   12
                              Alliance Investments Ltd

                              Authorized Signatory:

                              By: /s/ Illegible
                                 --------------------------------
                              Name: Illegible
                              Title: Authorized Signatory

                              Bank One, NA
                              -----------------------------------
                              Name of Lender

                              By: /s/ Catherine A. Muszynski
                                 --------------------------------
                              Name: Catherine A. Muszynski
                              Title: Vice President

                              Bank Polska Kasa Opieki SA
                              ------------------------------------
                              Name of Lender

                              By: /s/ Harvey Winter
                                 ---------------------------------
                              Name: Harvey Winter
                              Title: Vice President

                              STRATEGIC MANAGED LOAN PORTFOLIO
                              ------------------------------------
                              By: Citibank, N.A., as Manager

                              By: /s/ Hans L. Christensen
                                 ---------------------------------
                                        Hans L. Christensen
                                             Director

                              OSPREY INVESTMENTS PORTFOLIO
                              ------------------------------------
                              By: Citibank, N.A., as Manager

                              By: /s/ Hans L. Christensen
                                 ---------------------------------
                                        Hans L. Christensen
                                             Director

                              Citibank N.A. as Additional Investment
                              Manager for and on behalf of
                              Five Finance Corporation

                              By: /s/ Hans L. Christensen
                                 ---------------------------------
                                        Hans L. Christensen
                                             Director

                              By: /s/ M.G. Regan
                                 ---------------------------------
                                             Mike Regan

                              CREDIT-SUISSE FIRST BOSTON --
                              CAYMAN ISLANDS BRANCH
                              -------------------------------------
                              Name of Lender

                              By: /s/ Paul Corona
                                 ----------------------------------
                              Name: Paul Corona
                              Title: Vice President

<PAGE>   13
                                        CYPRESSTREE INVESTMENT PARTNERS I, LTD

                                        By: CypressTree Investment Management
                                            Company, Inc. as Portfolio Manager

                                        By: /s/ JEFFERY W. HEUER
                                            ------------------------------------
                                            Name: JEFFERY W. HEUER
                                            Title: PRINCIPAL

                                        CYPRESSTREE INVESTMENT PARTNERS II, LTD

                                        By: CypressTree Investment Management
                                            Company, Inc. as Portfolio Manager

                                        By: /s/ JEFFERY W. HEUER
                                            ------------------------------------
                                            Name: JEFFERY W. HEUER
                                            Title: PRINCIPAL

                                        CYPRESSTREE SENIOR FLOATING RATE FUND

                                        By: CypressTree Investment Management
                                            Company, Inc. as Portfolio Manager

                                        By: /s/ JEFFERY W. HEUER
                                            ------------------------------------
                                            Name: JEFFERY W. HEUER
                                            Title: PRINCIPAL

                                        NORTH AMERICAN SENIOR FLOATING RATE FUND

                                        By: CypressTree Investment Management
                                            Company, Inc. as Portfolio Manager

                                        By: /s/ JEFFERY W. HEUER
                                            ------------------------------------
                                            Name: JEFFERY W. HEUER
                                            Title: PRINCIPAL

                                            K2A CypressTree-1 LLC
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ KIMBERLY ROWE
                                            ------------------------------------
                                            Name: KIMBERLY ROWE
                                            Title: AUTHORIZED AGENT

                                            ELT Ltd.
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ ANN E. MORRIS
                                            ------------------------------------
                                            Name: ANN E. MORRIS
                                            Title: AUTHORIZED AGENT

<PAGE>   14
                                        Erste Bank
                                        ----------------------------------------
                                        Name of Lender

                                        By:  /s/ John Fay
                                            ------------------------------------
                                            Name: John Fay
                                            Title: Assistant Vice President
                                                   Erste Bank New York Branch

                                        /s/ John S. Runnion
                                        ----------------------------------------
                                        John S. Runnion
                                        First Vice President
                                        Erste Bank New York Branch

                                        Firstar Bank, N.A.
                                        ----------------------------------------
                                        Name of Lender

                                        By:  /s/ Mark A. Whitson
                                            ------------------------------------
                                            Name: Mark A. Whitson
                                            Title: Vice President

                                        First Union National Bank
                                        ----------------------------------------
                                        Name of Lender

                                        By:  /s/ Anthony D. Braxton
                                            ------------------------------------
                                            Name: Anthony D. Braxton
                                            Title: Vice President

                                        Fleet Bank
                                        ----------------------------------------
                                        Name of Lender

                                        By:  /s/ Frances L. Mueller
                                            ------------------------------------
                                            Name: Frances L. Mueller
                                            Title: Vice President

                                        General Electric Capital Corporation
                                        ----------------------------------------
                                        Name of Lender

                                        By:  /s/ Robert M. Kadlick
                                            ------------------------------------
                                            Name: Robert M. Kadlick
                                            Title: Duly Authorized Signatory

                                        Highland Legacy Limited
                                        ----------------------------------------
                                        Name of Lender

                                        By:  Highland Capital Management, L.P.
                                             as Collateral Manager

                                        By:  /s/ Todd Travers
                                            ------------------------------------
                                            Name: Todd Travers
                                            Title: Senior Portfolio Manager

                                        MLCBO IV (Cayman) Ltd.
                                        ---------------------------------------
                                        Name of Lender

                                        By:  Highland Capital Management, L.P.
                                             as Collateral Manager

                                        By:  /s/ Todd Travers
                                            ------------------------------------
                                            Name: Todd Travers
                                            Title: Senior Portfolio Manager

<PAGE>   15
                              PAMCO Cayman, Ltd
                              -----------------------------------
                              Name of Lender
                              By: Highland Capital Management, L.P.
                                  as Collateral Manager

                              By: /s/ Todd Travers
                                 --------------------------------
                              Name: Todd Travers
                              Title: Senior Portfolio Manager

                              IKB Deutsche Industriebank A.G.
                              Luxembourg Branch
                              -----------------------------------
                              Name of Lender

                              By: /s/ Illegible
                                 --------------------------------
                              Name: Illegible
                              Title: Manager

                              By: /s/ Illegible
                                 --------------------------------
                              Name: Illegible
                              Title: Director

                              INDOSUEZ CAPITAL FUNDING IIA, LIMITED
                              ------------------------------------
                              By: Indosuez Capital as Portfolio Advisor

                              By: /s/ Melissa Marano
                                 ---------------------------------
                              Name: Melissa Marano
                              Title: Vice President

                              INDOSUEZ CAPITAL FUNDING III, LIMITED
                              BY: Indosuez Capital as Portfolio Advisor

                              By: /s/ Melissa Marano
                                 ---------------------------------
                              Name: Melissa Marano
                              Title: Vice President

                              INDOSUEZ CAPITAL FUNDING IV, L.P.
                              BY: Indosuez Capital as Portfolio Advisor

                              By: /s/ Melissa Marano
                                 ---------------------------------
                              Name: Melissa Marano
                              Title: Vice President

                              STRATA FUNDING LTD.
                              By: INVESCO Senior Secured Management, Inc.
                                  As Sub-Managing Agent

                              By: /s/ Gregory Stoeckle
                                 ---------------------------------
                              Name: Gregory Stoeckle
                              Title: Authorized Signatory
<PAGE>   16
                                        OASIS COLLATERALIZED HIGH INCOME
                                        PORTFOLIO-1, LTD.

                                        By: INVESCO Senior Secured Management,
                                        Inc. As Subadvisor

                                        By: /s/ GREGORY STOECKLE
                                            ------------------------------------
                                            Name: GREGORY STOECKLE
                                            ------------------------------------
                                            Title: AUTHORIZED SIGNATORY
                                            ------------------------------------

                                            K2H Crescent LLC
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ KIMBERLY ROWE
                                            ------------------------------------
                                            Name: KIMBERLY ROWE
                                            Title: AUTHORIZED AGENT

                                            K2H Crescent - 2 LLC
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ KIMBERLY ROWE
                                            ------------------------------------
                                            Name: KIMBERLY ROWE
                                            Title: AUTHORIZED AGENT

                                            K2H Crescent - 3 LLC
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ KIMBERLY ROWE
                                            ------------------------------------
                                            Name: KIMBERLY ROWE
                                            Title: AUTHORIZED AGENT

                                            Lehman Syndicated Loans Inc.
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ MICHELE SWANSON
                                            ------------------------------------
                                            Name: MICHELE SWANSON
                                            Title: AUTHORIZED SIGNATORY

                                            MORGAN STANLEY DEAN WITTER PRIME
                                            INCOME TRUST
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ SHEILA A. FINNERTY
                                            ------------------------------------
                                            Name: SHEILA A. FINNERTY
                                            Title: SENIOR VICE PRESIDENT

                                            NATIONAL BANK OF CANADA
                                            ------------------------------------
                                            Name of Lender

                                        By: /s/ DAVID W. SHAW
                                            ------------------------------------
                                            Name: DAVID W. SHAW
                                            Title: VICE PRESIDENT

<PAGE>   17
                                        Sanwa Bank California
                                        ----------------------------------------
                                        Name of Lender

                                        By: /s/ John F. King
                                            ------------------------------------
                                            Name:  John F. King
                                            Title: Assistant Vice President

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

                                        CSK AUTO, INC.

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

                                        THE CHASE MANHATTAN BANK as
                                         Administrative Agent, Issuing Bank and
                                         a Lender

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

                                        SENIOR DEBT PORTFOLIO
                                        By: Boston Management and Research
                                            as Investment Advisor
                                        ----------------------------------------
                                        Name of Lender

                                        By: /s/ Payson F. Swaffield
                                            ------------------------------------
                                            Name:  PAYSON F. SWAFFIELD
                                            Title: VICE PRESIDENT

                                        Stanfield CLO Ltd.
                                        By: Stanfield Capital Partners LLC
                                            as its Collateral Manager
                                        ----------------------------------------
                                        Name of Lender

                                        By: /s/ Gregory L. Smith
                                            ------------------------------------
                                            Name:  Gregory L. Smith
                                            Title: Partner

                                        Stanfield/RMF Transatlantic CDO Ltd.
                                        By: Stanfield Capital Partners LLC
                                            as its Collateral Manager
                                        ----------------------------------------
                                        Name of Lender

                                        By: /s/ Gregory L. Smith
                                            ------------------------------------
                                            Name:  Gregory L. Smith
                                            Title: Partner

                                        Crescent/Mach I Partners, L.P.,
                                        By: TCW Asset Management Company,
                                            its Investment Manager

                                        By: /s/ SIGNATURE ILLEGIBLE
                                            ------------------------------------

<PAGE>   18
                                    The Sumitomo Trust & Banking Co., Ltd.
                                    --------------------------------------------
                                    Name of Lender            New York Branch

                                    By: /s/ Stephanie M. Fowler
                                       -----------------------------------------
                                       Name: Stephanie Fowler
                                       Title: Vice President

                                    VAN KAMPEN
                                    PRIME RATE INCOME TRUST
                                    By: Van Kampen Investment Advisory Corp.

                                    By: /s/ William D. Lenga
                                       -----------------------------------------
                                       Name:  William D. Lenga
                                       Title: Assistant Portfolio Manager
                                              Vice President

                                    VAN KAMPEN
                                    SENIOR INCOME TRUST
                                    By: Van Kampen Investment Advisory Corp.

                                    By: /s/ William D. Lenga
                                       -----------------------------------------
                                       Name:  William D. Lenga
                                       Title: Assistant Portfolio Manager
                                              Vice President

                                    VAN KAMPEN CLO I, LIMITED
                                    BY: VAN KAMPEN
                                    MANAGEMENT INC.,
                                    as Collateral Manager

                                    By: /s/ William D. Lenga
                                       -----------------------------------------
                                       Name:  William D. Lenga
                                       Title: Assistant Portfolio Manager
                                              Vice President

                                    VAN KAMPEN CLO II, LIMITED
                                    BY: VAN KAMPEN
                                    MANAGEMENT INC.,
                                    as Collateral Manager

                                    By: /s/ William D. Lenga
                                       -----------------------------------------
                                       Name:  William D. Lenga
                                       Title: Assistant Portfolio Manager
                                              Vice President

                                               Wells Fargo Bank N.A.
                                    --------------------------------------------
                                    Name of Lender

                                    By: /s/ Michael Real
                                       -----------------------------------------
                                       Name:  Michael Real
                                       Title: Vice President

<PAGE>   19
                         SEQUILS I, LTD

                         By: TCW Advisors, Inc. as its
                             Collateral Manager

                         By: /s/ [Illegible]
                            -----------------------------------------
                         Name:
                         Title:

                         By: /s/ Jonathan R. Insull
                            -----------------------------------------
                         Name: Jonathan R. Insull
                         Title: Senior Vice President

                         SEQUILS IV. LTD

                         By: TCW Advisors, Inc. as its
                             Collateral Manager

                         By: /s/ [Illegible]
                            -----------------------------------------
                         Name:
                         Title:

                         By: /s/ Jonathan R. Insull
                            -----------------------------------------
                         Name: Jonathan R. Insull
                         Title: Senior Vice President

                         TRANSAMERICA BUSINESS CREDIT CORPORATION
                         --------------------------------------------
                         Name of Lender

                         By: /s/ Stephen K. Goetschius
                            -----------------------------------------
                         Name: Stephen K. Goetschius
                         Title: Senior Vice President

                         THE INDUSTRIAL BANK OF JAPAN, LIMITED
                         --------------------------------------------
                         Name of Lender

                         By: /s/ Vicente L. Timiraos
                            -----------------------------------------
                         Name: Vicente L. Timiraos
                         Title: Joint General Manager

                         THE MITSUBISHI TRUST AND BANKING CORPORATION
                         --------------------------------------------
                         Name of Lender

                         By: /s/ Toshihiro Hayashi
                            -----------------------------------------
                         Name: Toshihiro Hayashi
                         Title: Senior Vice President

                         THE PROVIDENT BANK
                         --------------------------------------------
                         Name of Lender

                         By: /s/ Nick Jevic
                            -----------------------------------------
                         Name: Nick Jevic
                         Title: Senior Vice President

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