Brake Antilock Wheel Speed Sensor problems of the 1999 GMC Sierra

: the contact stated the abs engaged at speeds of 16m ph or less in normal driving conditions when brake pressure was applied. The vehicle was seen by a dealer who suggested the front wheel speed sensors should be replaced, but no repairs were made. There is a NHTSA recall, # 05v379000, regarding the antilock brakes. The vehicle has the same problems as indicated in the recall; however it is not included in the recall due to the VIN. Updated 04/11/06.

1. Antilock brakes activate at low speeds 2. Being unable to stop it could lead to rear end collisions or car pedestrian accidents 3. Replaced 2 front end wheel speed sensors.

The contact owns a 1999 GMC Sierra 1500 4wd. He contacted GMC about NHTSA recall 05v379000 concerning abs brakes. Consumer' lived in maryland and his was not listed for the recall he almost had an accident last week because of this problem with the wheel speed sensor. He almost ran into trailer because he had the brakes on, and at a certain speed, released them. He had to swerve to keep from hitting the trailer. When he let off of the brake pedal and pressed the brakes again it stopped the vehicle. The estimated speed at the time of this incident was under 10 mph. There where no injuries.

Abs activated on dry road while stopping on a slight grade . This resulted in a loss of brakes as if a brake line failed. I shot forward about three feet then all four wheels locked up. After the accident the abs light came on so when I got home I had my mechanic check the codes. The abs control unit was bad but gave no indication until after the accident. The mechanic told me that this wasn't the first time he had someone with a99 - 02 gm truck in his shop with this same problem . For me this failure resulted in $5000. 00 damage to my truck as well as damage to the vehicle in front of me (which luckily we also own). I just got a recall notice today almost three months after the accident for the abs speed sensor that causes this same type of malfunction but what about the control unit on the frame rail ? in this case it also failed and costs almost $1000. 00 just for the part alone before it is replaced. That's over $6000. 00 by the time every thing is fixed.

I was pulling into my driveway, applied the brakes to my 1999 GMC Sierra 4x4 pickup truck, VIN no. 1gtek19v4xe552750, and I could not stop and hit the rear end of my girlfriend's 2001 chevy blazer. I was advised to contact gm of the accident as there is a recall in canada (product safety bulletin [psb]- front wheel speed sensor corrosion #04094 dated January 25, 2005) for brake failure. Gm representatives sent a fact finder to determine if the problem was the wheel sensor. The body damage repair estimate to my truck is $2,902. 86 and $1,907. 79 to the blazer. The estimates were faxed to gm and we were informed that the report indicated there was a problem but, since the damages were over $1,000. 00 the case had to be referred to risk management. Risk management stated the fact finders report did not indicate a problem which was contrary to what I was told previously. I requested a copy of the report and was denied as it is considered proprietary information. I informed risk management that a TSB had been issued which they claimed they were unaware of. Risk management offered to pay 50% of the damages. I called the original contact person at gm and was told the report indicated that there was not a current diagnostic problem however, the history code shows that the left front wheel speed sensor was missing - dropped out of circuit - indicating that there has been past problems with the wheel sensor. Since the accident I borrowed my mother's car and was asked to return it so, I drove my truck through a 40 mph zone, my hood flew open breaking the hinges. I have not had my truck or my girlfriend's blazer fixed as I am uncertain what to do. I feel it is wrong to request my insurance company to pay for damages that are clearly the fault of the manufacturer. In addition, if this type of incident occurs in a crowded area someone could get seriously hurt or killed. I ask for your assistance in resolving this issue for the safety of everyone. Thank you.

(1) recall on wheel speed sensor causing increased stopping distances. (2) due to wheel speed sensor causing unwanted abs activation, the abs module turned defective. As a result, the module needed replacing due to over activation. A low speed crash occurred due to not being able to stop. (3) during the recall campaign, the manufacturer refused to relate the crash or the faulty abs module to the wheel speed sensor. They estimated repairs in the thousands of dollar range. They refused to fix the malfunction. I do not have abs on my vehicle at this time.