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

 

What was done if anything to the rotors? Do you feel anything in the brake pedal? Are the pads conventional or metalic?

 

I don't know if the rotors were re-surfaced. Convential pads.

Occasional momentary "chatter"when brakes are applied 3 times this past week.

 

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.

 

Thanks for the reply,

I'll mention your comments to my mechanic.