Brake Antilock Wheel Speed Sensor problems of the 2004 Chevrolet Colorado

Abs triggered unexpectedly, abs and traction warning lights came on. No loss of control. Repaired at dealership 10/14/11 replacing rf wheel bearing hub and speed sensor. Subsequently incident repeated on two occasions, CA. 11/15/11 and CA. 12/16/11 after starting into a turn at low speed, perhaps with slight braking. No loss of control. Checked at dealership 2/14/2012 with no cause determined. Later same day, failure occurred again, with same symptoms: low speed with turn and perhaps slight braking. No loss of control. Diagnosis suggested faulty hubs again. Resolution pending.

For beeing mechanically inclined this is definetly one problem I cant fix. I did the pads and rotos on my 2004 chevy Colorado, all went well, nice and easy. Later that week my abs light came on. I had my breaks checked and the mechanic said it wash showing wheel speed sensor. I bought the part and replaced it nice and easy again. The light turned off for about 2 min then came back on. The next time I went to drive my truck I turned it on, the sensor was off then the abs system started engaging on and off making a wiered pump sound and making my brakes ingage and disingage. This happens for about 20 sec then goes away and the abs light comes back on. I thought nothing worse could happen after having the computer replaced twice on the truck. This is worse.

The contact owns a 2004 Chevrolet Colorado. When the contact depressed the brake pedal, the abs did not respond. The abs light illuminated at random, which caused the brakes to randomly pulsate. The dealer stated that the vehicle needed front hubs, bearings, and wheel speed sensors on both sides. The contact stated that he cannot afford the $1,400-$1,600 repair cost. There were no recalls for this failure. The failure mileage was 43,000. Updated 07/01/09 updated 07/06/09.

Speed sensor in the wheel hub assembly goes bad. This causes the abs to stop working properly.