File No. 333-61516

                               U.S.$8,000,000,000
                      GENERAL MOTORS ACCEPTANCE CORPORATION
                                 SMARTNOTES(SM)
             DUE FROM NINE MONTHS TO THIRTY YEARS FROM DATE OF ISSUE

      Unless otherwise specified in an applicable pricing supplement, the
SmartNotes will not be listed on any securities exchange, and there can be no
assurance that the SmartNotes offered will be sold or that there will be a
secondary market for the notes.

    The Agents have advised GMAC that they may from time to time purchase and
sell notes in the secondary market, but the Agents are not obligated to do so.
No termination date for the offering of the notes has been established.

Pricing Supplement No. 20                        Trade Date:     10/25/2001
(To Prospectus dated June 8, 2001)               Issue Date:     10/30/2001

The date of this Pricing Supplement is October 25, 2001

    CUSIP         Stated
     or           Interest                   Price to
Common Code       Rate          Maturity     Public 1     Reallowance
-----------       --------      --------     --------     -----------
 37042 GSQ0       4.750%        10/15/2003    100%        0.3000%
 37042 GSR8       5.250%        10/15/2004    100%        0.4500%
 37042 GSS6       6.000%        10/15/2006    100%        0.7500%
 37042 GST4       6.500%        10/15/2008    100%        1.0000%
 37042 GSU1       7.000%        10/15/2011    100%        1.1000%
 37042 GSV9       7.550%        10/15/2016    100%        1.6000%

Payment           Survivor's                 Subject to Redemption
Frequency         Option        Yes/No       Date and terms of redemption
---------         ----------    -----------------------------------------
Semi-Annual       Yes            No
Monthly           Yes            No
Quarterly         Yes            No
Semi-Annual       Yes            No
Monthly           Yes            Yes    Callable at 100% on 10/15/2003 and every
                                        coupon date thereafter
Semi-Annual       Yes            Yes    Callable at 100% on 10/15/2004 and every
                                        coupon date thereafter

1 Actual Price to Public may be less, and will be determined by prevailing
market prices at the time of purchase as set forth in the confirmation
statement.
                            Per Note             Total
                            --------             -----

Public Offering Price ..... 100.00%              $8,000,000,000

Agents' Discounts
  and Concessions ......... .20%-2.50%           $16,000,000-$200,000,000

Proceeds, before
expenses, to General
Motors Acceptance
Corporation ............... 97.50%-99.80%        $7,800,000,000-$7,984,000,000

(SM) Service Mark of General Motors Acceptance Corporation

     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF
THIS PROSPECTUS IS TRUTHFUL OR COMPLETE.  ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
                               __________________

ABN AMRO FINANCIAL SERVICES, INC.
    A.G. EDWARDS & SONS, INC.
        EDWARD JONES & CO., L.P.
            FIDELITY CAPITAL MARKETS
                a division of National Financial Services LLC
                    MERRILL LYNCH & CO.
                         MORGAN STANLEY DEAN WITTER
                             PRUDENTIAL SECURITIES
                                 SALOMON SMITH BARNEY
                                     CHARLES SCHWAB & CO. INC.
                                            USB PAINEWEBBER INC.

                               June 8, 2001