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ABS and Traction Control issues

Michael Nash

By Michael Nash
in Ask A GM Technician

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Michael Nash New Member

Michael Nash

Posted
Posted

I have a 2003 Yukon Denali. Whenever I slow to a stop, the ABS kicks in, and I can feel the brakes pulsating. and when i'm turning at slow speeds the ABS kicks in. Sometimes when I accelerate from a stop, traction control kicks in, only allowing me to drive 10mph until I take my foot off the gas pedal. I suspect an issue with the hubs or sensors, but I don't hear any noise, so i want to get another opinion before I order parts. 205,000 miles and the first major problem I've had besides air ride suspension.

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

I keep seeing this same exact issue popping up with this model year, and a few different models quite a bit on this site. I can't remember what the solution was to it, however. But, there's a good chance someone else does. You'll get a response eventually.

nht mike Enthusiast

nht mike

Posted
Posted

I had the same problem with my '94. It was the speed sensor. I found the problem was by watching the speedometer. When slowing down at 5MPH the needle would drop to zero and the brakes would go to antilock. The brakes would stay in antilock even when stopped until I took my foot off the brake.

 

Mike

  • 1 month later...
silveradosid Senior Enthusiast

silveradosid

Posted
Posted

very common gm problem, one or maybe both front wheel abs sensors quits reading at low speeds. you can try and take the sensors out of the hub but most time they break. if you have a volt meter you can check the output of the sensors and find which one is failing

Duelin Enthusiast

Duelin

Posted
Posted

+1^ What happens on a lot of those. Is rust builds up under the sensors and pushes the sensor away from the ring tone. Like silveradosid said if you can get them out you can clean up the rust real good. Apply a film of grease and reinstall. If that doesn't take care of it you will have to get new hubs.

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