Question about 1999 GMC Sierra

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Abs light comes on and off randomly

I start it up and sometimes the light comes on right away and sometimes doesnt come on till i hit the break, but when the light is off and i hit the break pretty hard the pedal still pulses but just not like normal

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  • logan_stanko Feb 11, 2009

    i have no idea wut that is, i was just thinkin it could be a bad sensor, cuz my book was sayin there was a sensor some where  on some wheel haven to do with the abs light comein on, and i pluged up the obd2 reader and it wasnt pullin up the code for it

  • logan_stanko Feb 11, 2009

    ok well could it be a sensor then, and i just ranked it like that cuz i mean it didnt fit it, just being honest too, and the manual said to try obd reader so i did

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Sounds like an intermittant fault in the ABS control valve, most likely one of the solenoid valves is sticking or out of self test range..

Posted on Feb 11, 2009

  • yadayada
    yadayada Feb 11, 2009

    I gave u good sound honest info based on 30 years as a dealership tech, and that includes chevy dealers, just trying to help, thanks for trying??? OBD code reader will not read ABS codes, it reads emission and engine fuel management codes and data only.

  • yadayada
    yadayada Feb 11, 2009

    well good luck on this, do this free of charge, just trying to help,

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