Pricing Supplement Dated July 31,2001                         Rule 424(b)(3)
(To Prospectus Dated February 20, 2001)                   File No. 333-55440

                      GENERAL MOTORS ACCEPTANCE CORPORATION
                        Medium-Term Notes - Floating Rate
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Agent:                       Lehman Brothers, Merrill Lynch, Salomon Smith
                             Barney, JP Morgan Securities Inc., Morgan Stanley,
                             Bear Stearns, UBS Warburg, Bank of America
Principal Amount:            $2,059,950,000.00
Agent's Discount
  or Commission:             $1,998,152.00
Net Proceeds to Company:     $2,057,951,848.00

Initial Interest Rate:       Reset on the Issue Date (also an Interest
                             Reset Date).
Issue Date:                  08/03/01
Maturity Date:               08/04/03
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Calculation Agent:  GMAC
Interest Calculation:
      /X/  Regular Floating Rate Note
      Interest Rate Basis: / / CD Rate             / / Commercial Paper Rate
                           / / Prime Rate          / / Federal Funds Rate
                           /X/ LIBOR (see below)   / / Treasury Rate
                           / / Other
                           (see attached)
      If LIBOR, Designated LIBOR Page / / Reuters Page: / / or
        /X/ Telerate Page: 3750

Interest Reset Dates:   Each February 4, May 4, August 4, and November 4.
                        The first interest reset date will be August 3, 2001.
                        The final reset date will be May 4, 2003.
Interest Payment Dates: Each  February  4, May 4, August 4, and November 4
                        commencing November 4, 2001 and ending August 4, 2003.
Index Maturity:         3 Months
Spread (+/-):           +.33%

Day Count Convention:
      /X/ Actual/360 for the period from 08/03/01 to 08/04/03
      / / Actual/Actual for the period from / / to / /
      / / 30/360 for the period from / / to / /
Redemption:
      /X/ The Notes cannot be redeemed prior to the Stated Maturity Date.
      / / The Notes may be redeemed prior to Stated Maturity Date.
      / / Initial Redemption Date:
          Initial Redemption Percentage: ___%
          Annual Redemption Percentage Reduction:  ___% until Redemption
          Percentage is 100% of the Principal Amount.
Repayment:
      /X/ The Notes cannot be repaid prior to the Maturity Date.
      / / The Notes can be repaid prior to the Maturity Date at the option of
          the holder of the Notes. (See Below)
      / / Optional Repayment Date(s):
          Repayment Price:    %
Currency:
      Specified Currency: U.S. (If other than U.S. dollars, see attached)
      Minimum Denominations: ___________ (Applicable only if Specified
      Currency is other than U.S. dollars)
Original Issue Discount:  / / Yes     /X/ No
      Total Amount of OID:            Yield to Maturity:
      Initial Accrual Period:
Form:  /X/  Book-Entry              / /  Certificated
Other: /X/  Principal               / /  Agent

If as principal:
         / /  The  Notes  are being  offered  at  varying  prices  related  to
              prevailing market prices at the time of resale.
         /X/  The Notes are beings  offered at a fixed initial  public  offering
              price of 100% of principal amount.

If as agent:
         The Notes are being offered at a fixed initial public offering price of
         XX% of principal amount.