Air Brake Wheel Speed Sensor problems of the 2000 GMC Yukon

1. During a family vacation to florida, my braking system started to fail at slow speeds normally between 5 and 10mph. The brake pedal would become stiff and the system would make noise like the abs was being activated. 2. Being a family vehicle, I had the repair done immediately, the technicians in florida were not familiar with my symptom. At first they replaced the master cylinder but this did not solve the problem. 3. The crew took two additional days to figure out finally that the front wheel sensors for the abs were corroded (because I live in maine) and they finally replaced the sensors and this alleviated the problem.

Abs brakes engaged with no warning at low speeds (parking lots, stop signs, drive throuhs) and greatly increased the stopping distance and safety. This was occouring in the fall of '04 ealy winter of '05. This would happen on totaly dry surfaces, and was to great of a risk to leave un-repaired. I had to pay over $900. 00 to correct the one front wheel and the other(s) are sure to follow. This is poor compenent deisign, and should be repaired as defective. An owner should not have to disconect the abs computer to avoid the brake failure, if they are not able to pay the $900. 00 + per hub. Also occaisionaly after clicking driver's seat belt, with out warning, the belt released at the latch. Not under strain, and after it had been fully engaged. Why?.

This relates to the recently announced investingation into the anti-lock brakes on gm light trucks and suvs. Nhtsa action number pe05020 I own a 2000 Yukon xl. When the vehicle was about 2 1/2 years old, it developed the slow-speed abs activation problem described in your above-described action, resulting in occasional inability to stop properly at stop signs and parking spaces. The frequency of incident increased, until in early 2004, we had an incident where we bumped another vehicle, although with no damage or injuries. We then took it to a local GMC dealership, who repaired it by disassembly, cleaning and reassembly, at our expense, since the warranty period had lapsed. As of now, the problem has not yet reoccurred, however, we believe that since the problem was caused by corrosion, it will reoccur. We would like a permanent fix, as well as perhaps gm to take financial responsibility for the repair already performed.

Dt; when you apply brake pressure do not know if you will stop or not. You heard this was a problem with the sensor. Brakes have been replaced along with sensors and you still have the problem.