1999 Chevrolet Silverado LS review from North America

Problem with wheel speed sensor inputs at low speeds.

I recently purchased a '99 Silverado from the dealership where I work. One of the problems I have experienced is with the wheel speed sensor inputs at low speeds. The bad inputs will be a few miles/hour off from the rest of them resulting in an Anti-lock Brake System failure. Distance to stop the vehicle is greatly increased and is very undesirable. This condition, most of the time will not set a trouble code and has to be checked at a dealership or at a garage with proper equipment.

The other problem is a buzzing noise that I have identified is the pump motor running. This is usually caused by a defective Electronic Brake Control Module. I have changed at least 4 of these on other trucks.

Both conditions described are very costly, especially for the average person whose warranty has run out. They are both also a potential traffic hazzard. As of now, I know no other way to correct either problem other than replacing the defective parts. I suggest you watch your rear view mirror, as there could another Chevrolet product that has to play "bumper tag" because it can't stop. Hopefully, we will not be "it!"