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Thread: ABS - Code 37

  1. #1

    Default ABS - Code 37

    Looking for information. When my 6.5 turbo 1995s ABS light comes on the transition slips between 20-40 km/HR. Above and below its ok. When the light is not on its fine. If I leave it off for an hour the light does not come on and it runs fine for a while till the light comes back on.

    Any advice would be appreciated.

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Default

    DTC 37 = Brake switch stuck ON

    In all likelihood, your tranny isn't "slipping", but the TCC (Torque Converter Control) is unlocking the TC. The RPMs increase, but it remains engaged. You can replicate the condition any time the converter is locked by applying light pressure to the brake pedal. The converter should unlock and RPMs should increase with power applied (two feet, one with constant throttle, while applying slight brake pedal). The DTC may be accurate, and the brake switch is not working like it should.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Apr 2001
    Location
    Newberg Oregon
    Posts
    12,282

    Default

    I agree with Maverick.

    IIRC this is a multi function switch....

    Replace that switch and life should be good.

    Another thing you can do is lift the pedal and see if the issue resolves.

    Likely just a worn out switch.....
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  4. #4

    Default

    Thanks very much guys. When I apply the brake slightly while having pressure on the fuel peddle the RPM do go up. Googled the brake switch. Now for the IIRC!

  5. #5

    Default

    I should have asked how to check the brake switch. After getting home now the truck runs great and I can't reproduce the problem. Thx

  6. #6
    Join Date
    Jan 2001
    Location
    Knoxville,Tennessee
    Posts
    2,639

    Default

    If
    I
    Recall
    Correctly


    Part number not available!



    Brake switch is inexpensive just change it
    "The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
    -Patrick Henry


    A5150nut
    2006 K3500 D/A
    94 6.5 4x4 5spd Sold

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