2003 GMC brake problem

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  #1  
Old 08-27-13, 02:28 PM
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2003 GMC brake problem

2004 Sierra 4x4,auto. Had a 4 wheel brake job done last month, and have developed a "chatter" sometimes when brakes are applied.

My trusted mechanic thinks problem is with brake wheel sensor/s.

Any comments here ? Suggestions?

Thanks
 
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Old 08-27-13, 02:49 PM
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What was done if anything to the rotors? Do you feel anything in the brake pedal? Are the pads conventional or metalic?
 
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Old 08-27-13, 03:32 PM
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I don't know if the rotors were re-surfaced. Convential pads.

Occasional momentary "chatter"when brakes are applied 3 times this past week.
 
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Old 08-27-13, 07:48 PM
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If the truck is equipped with ABS brake control then there could be an issue from a wheel speed sensor. The brake pedal would have a short pulsation when you hear the chatter and the brakes may not seem as effective. All ABS systems go through a bite cycle or a test cycle just after the car is started and driving begins. You wouldn't notice it unless you were applying the brake pedal at the same time. The other concept is a wheel speed sensor, they are a coaxial cable that generates a voltage based on the wheel speed. When a sensor has a bad cable it will give a input to the control unit that indicates the wheel had slowed or stopped causing the pulsation or chatter that your mechanic is suggesting.
 
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Old 08-28-13, 05:16 AM
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Thanks for the reply,

I'll mention your comments to my mechanic.
 
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