Air Brake Wheel Speed Sensor Problems of Chevrolet Suburban

On Tuesday, July 19th, I had 2001 Chevrolet Suburban serviced at a local shop, where I received my manufacturer's suggested 60k maintainence, which included an inspection of all my primary systems, including brake. No problems were reported. On Friday, July 22, 2005, I was pulling into my driveway at approximately 3:45pm. As I approached my driveway from the street, I began braking with the intention of parking in the driveway in front of my garage; however, rather than simply slowing down, my brakes instead made a strange vibration (sound and movement), and the brakes appeared to malfunction. I attempted to pump my brakes, but the "vibrations" continued and my truck seemed to "slide", even though I was now pressing on my brake pedal with all my might. My truck overshot my driveway parking spot, and crashed into my garage door. The vehicle destroyed the garage door, and there was front end damage to my bumper, hood, grill and windshield. The driver's and passenger's airbags did not deploy. Immediately afterwards, my neighbor and I inspected the brake fliud, master cylinder and visible systems, which appeared intact, and test drove the vehicle around the neighborhood, without further incidence. However, I did not drive the truck until 2 days later, when I drove on Sunday, July 24th, at which time the brake "vibrations" re-occurred as I pulled into a turn lane into a supermarket parking lot. I had the truck towed to the local Chevrolet dealership, and after their brake inspection, I was told that the abs wheel speed sensor needed to be replaced, which would be at no cost because it was "under warrenty", and that they also wanted to replace my rear rotors, at a cost of over $800. When I asked carol, the service rep, if the wheel speed sensor could have casued my brake malfunction, she said possibly, but no definately. When I asked if the rear rotors could have contributed, she said no. No other braking problems were reported.

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Anti lock brakes activate at low speeds, leading to a loss of control and longer stoping distances.

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2000 cherolet Suburban at slow speeds when braking the abs is activated, which increases my stopping distance. This creates the possibility of hit something or more importantly someone.

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Problem with antilock brakes- longer stopping distances required when brakes are applied during low speeds. No incident has occurred.

Unwanted activation of the abs braking system and increased stopping distance during low speed braking applications.

1) several time when pressing on the brakes going at a slow rate of speed had the anitlock brakes start activating (pulsating) was able to stop with no incident but had to press my foot as hard as possible to stop. 2) took the 2002 chevy Suburban into a Chevrolet dealer and had the brakes repaired. Found out the sensors were clogged with dust from brakes.

I see online that the 1999 Suburban's anti lock brakes activate unexpectedly and are under investigation. I also had this problem and have repaired it in accordance with gm's technincal service bulletin on the subject. I removed the antilock sensors and cleaned the rust off of mounting surface on the front brakes and the problem subsided. The problem occurred when under 10 mph and was frequent and unexpected. On one occasion I nearly hit the fire station I work in's apparatus door and on another occasion I nearly hit a fence on the backside of my driveway.

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Anti locks system kicks in at almost every stop. Starts to vibrate at 4 to 5 mph. At diagnostic before we couldn't get a reading period, it was on lift standing still. Abs was readind moving at 3mph.

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1. When braking at low speeds, the anti-lock brakes come on. 2. My truck won't stop - I could crash into anything, worse yet - I could injure someone. 3. Nothing has been done to correct this failure yet. I'm dealing with this daily!.

While driving brakes failed when trying to make a sudden stop. Driver avoided a collision by continuing to slam on the brake pedal until the vehicle stopped. Vehicle was towed to the dealer, who determined the cam shaft position sensor was the cause of the brake failure.

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