EXHIBIT 99.1


                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of General Motors Acceptance Corporation
(the Company) on Form 10-Q for the period ending June 30, 2002 as filed with the
Securities and Exchange Commission on the date hereof (the Report), I, John D.
Finnegan, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C.
ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002,
that to the best of my knowledge:

(1)  The Report fully complies with the requirements of section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and
(2)  The information contained in the Report fairly presents, in all material
     respects, the financial condition and results of operations of the Company.




/s/  John D. Finnegan
- ----------------------------------------


John D. Finnegan
Chairman, President, and
Chief Executive Officer
August 14, 2002