Question about 2002 GMC Sierra 1500

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Abs coming on when around 10 km and lower. pedal goes to the floor and loose all brakes. no abs light on though

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  • HenBen Aug 14, 2008

    Same problem I have. I have already replaced ABS sensor, as per dealer and it didn't fix issue. Not sure what to do now.

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Thx for the info. I have already replaced the 2 front wheel bearing, as dealer had told me that only the front wheel bearing had ANS sensors on them. I have not yet replaced the back ones.............still having the same issue. My question is do you have to reset anythng on the computer when you change the actual ABS senser. I also heard on the 2002 Envoys that the ignition switch may be the culprit here. Any thoughts on that.

Thx again for feedback.
Hery

Posted on Aug 29, 2008

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I had the same problem and I had to replace the axel bearings, it is most likly a worn out bearing. I would hit the pedal and it would activate the ABS and I would lose braking. The bad bearing is losing grip and telling the computer that the wheel is slipping thus causing the computer to activate the ABS. Bearings cost me 165.00 out the door after taxes. No core value on the old one. this should solve your problem, solved mine. Last note: if you are running anything other than stock tires and rims it will wear out the bearings faster than normal resulting from the change in force applied to the bearing. Hope this all helps.

AJR

Posted on Aug 29, 2008

  • dfwithin Aug 29, 2008

    commenting on my above comment. Before buying anything you can most likly self diagnose the prob. yourself . On my 2002 it sounded like there was a rock in my rotors. my brakes would work fine but when i came to stop they would lock-up and nearly cause a couple fender benders. jack up the front end and grab the tire and rock latterally and test for looseness or play. If loose then bearing is shot. You could also spin the tire in both directions and see if it grinds or comes to a quick stop, all resulting in bearing problems. bearing should be replaced at or around 1500000 miles if truck is used with AM tires and wheels.

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