Question about GMC Sierra 1500
I think what you are trying to say is the ABS engages at slow speeds when it shouldn't. This is known as overactive ABS.
GM has a technical service bulletin for this. they want you to remove the ABS sensor. Thoroughly clean the mounting surface of any rust/debris. Apply a thin coat of di-electric grease to the mounting surface and reinstall the sensor.
You will need to remove the caliper and rotor to gain access to the sensor. It will be able to remove the bolt with either an allen head socket or a torx socket. Be careful when trying to pull the senosr out. Sometimes the can be pinched into place by the build op of rust. If it breaks off you'll have to replace the wheel bearing hub assembly.
In order to minimize the potential expense of having to replace both wheel bearings you can have the ABS system scanned. Your not looking for codes your looking for data so a high end scan tool will be needed. While observing wheel speed data during a slow stop note which sensor drops to zero first. That's the sensor you should try cleaning the mating surface first.
Posted on Sep 29, 2010
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Posted on Jan 02, 2017
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