Brake Electric Antilock problems of the 1999 GMC Sierra - part 2

Abs motor would remain on after turning off vehicle. Dealer contacted. There was a recall issued in 1998 for this defect. Consumer was pulling a 1994 airstream which caused the brake control on the trailer to quit operating. When approaching a red light, the trailer pushed the vehicle approximately 100 feet. If there had been an auto in front of the vehicle there would have been an accident.

Consumer states that abs motor is staying on after vehicle has been turned off, causing abs motor system to fail.

Motor on abs module will not shut off until fuse is pulled or unit unplugged. Dealer said this was common and there should be a recall.

While applying brakes pedal goes all the way to the floor. Also, has to resat emergency brake in order to work. Dealership is aware of the problem.

Brake module valve assembley motor will continuously stay on and will shut off. There is a recall on vehicle model/ make for that problem, but this vehicle wa snot included.

Abs motor would continued to run after vehicle was turned off. Dealer notified. Feel free to provide any further information.

After first start abs pump kept running, dealer replaced abs control module.

In discussing this part failure with other owners it appears that this part fails at a high rate. The service department agrees that there is a significantly higer rate of failure in this part than is usual. I am requesting that you investigate these failures and would also like any information concerning the failure rate of this part and any information concerning accidnets caused by this part failure.

No summary listed for above vehicle.

Abs brake motor keeps running and system keep working as though foot was on brakes and vehicle sliding. Also, had to take fuse out to stop abs motor from running. Contacted dealer, and dealer stated what it will cost to fix.

GMC Sierra has been in shop to many times to keep track of. Truck also has a problem with sticky throttle body which has been dangerous. GMC gave extended warranty in 2000 bacause of problems also issued customer appreciation certificate if I wanted to buy new gm product. Service manager told me to cut my losses and but a new one. GMC will not do a thing for me. Contacted nys attn. General about problems. GMC now has their legal core calling me at home . I have asked them to buy vehicle back research the parts and assembly to protect other owners. GMC says sorry . I asked them how they could warranty rust thru for 100,000 but could not protect abs from corrosion, GMC response was hey you live in new york state. And they are under no financial obligation what so ever.

After getting home and turning off engine could still hear motor running. Then, took vehicle to dealer. They said that defect was with abs module which they could not fix.

While driving 5 mph and applying brakes abs braking system malfunctioned, causing extended stopping distance. Abs system completely went out, resulting in two warning lights illuminating, abs system (motor) could not be shut down until battery cables were removed.

Abs module kept running after the vehicle was turned off, had to un-plug the abs motor now the abs and the brake lite stays on all the time. Need's to be a recall on this part after all the problems people are having with the important parts of a new trucks braking system. How many more will have to go out/fail before there is a recall on it, not many I hope. Let down on the dependability of this new truck, my 1995 Chevrolet was more dependable than this one. And it had 350,000 miles on it before it finall layed down!!!!.

Placement of the abs control module (in the frame rail under the cab) subjects it to corrosion from road salt and other debris. Gm knows about the problem and should fix it as it is a safety issue.

No summary listed for abov evehicle.

I was having trouble moving the drivers front seat forward or backwards, I left it in the foward position as I was driving along a city street ,I came up to a light and the seat anchorage became broken causing me to strick the steering wheel. I feel that if I had been going faster then 25mph I would have gotten hurt worse. I had a factory defect on the front seat belts,which I had taken to the dealer ,I was adviced that the parts were not in and had to be ordered. This was back in November or so to the best of my recllaction. 2-28-2001 I called the GMC customer assistance office spoke with a GMC representative and declare my problem , I wanted this deficiency to be covered under warranty,and I was adviced that it was not. Now what good is the seat belt doing me when the seat will not stay ,I have been using my left foot for support against the brake release that is mounted on the side of the drivers door,it keeps me from going foward at slow speeds what is going to happen if a vehicle in front of me suddenly stops? what good is this type of safety seat belt if the seat will not stay stationary,if this happen to my vehicle I dont doubt it will happen to some one else and mybe they wont be so lucky. Another safety feature that was installed be the manufacture is the antilock brakes, they are also not covered under an extended warranty like the emission system, I feel that the seat and antilock brakes should be more of a safety concern then the emission system. Any information will be kindly appreciated thanks for your time.

I have had ongoing problems with the brakes on this truck since I purchased it brand new. When I attempt to stop and rollover a small bump or hole in the road the brake pedal losses pressure and the pedal goes all the way to the floor. In California where I live, it is very hilly and I drive on hills on a daily basis, however I have had to adjust my normal driving and begin to brake 100-150 feet before coming to stop sign to protect my family. When the truck rolls over a small bump or hole, the vehicle will not stop and go right through the intersection. I have taken the vehicle to three (3) different local GMC dealers and they all said that this was normal abs brake operation. I told each of them that this was not normal braking operation. On June 11, 2001, my family and I went to the local supermarket. When I stopped the vehicle I heard what sounded like an electrical motor running underneath the truck. I drove the vehicle home and called for a next day appointment at the local GMC dealer. The next morning when I attempted to drive the vehicle to the dealer the truck would not start, the battery was dead. I called aaa and they came and jumped the dead battery and drove to the dealer repair shop. The dealer stated that the abs control had completely failed and replaced it. However, I still have the same braking problems I had prior to the dealer replacing the 4-wheel anti-lock brake control.

While cutting vehicle off, consumer noticed a noise coming from engine compartment. Consumer unhooked wiring to abs brakes. Consumer contacted dealer, dealer stated vehicle needed a module. Please provide any further details.

Consumer states that when trying to apply the anti lock brakes, they will lock up causing the vehicle to have extended stopping distance. Dealer notified.

Consumer states abs activates when vehicle hits a bump at any speed, on dry pavement, gm tech stated this was normal.

While vehicle was parked and motor running consumer noticed electric brake module was running. Called mechanic who disconnected fuse. Module was replaced by dealer.

Anti locking braking ststem failed, pump ran all the time.

When brakes applied in panic stop, pedal goes to floor. This allows inadvertant contact with accelerator most of the times I tried to duplicate this after the accident using right foot to brake. Precise placement of right foot is necessary for me to prevent this( I have to look down at my foot to get it where it won't hit the accelerator in this situation). Measurements made indicate that when the brake pedal bottoms out due to the panic stop it travels about 1/2" past the accelerator, allowing contact with it if your feet are big like mine. The brake pedal will not travel far enough to allow this to happen during normal braking. This is a followup to odi#744510. I just got my truck out of the shop yesterday and duplicated the braking problems of the accident. I measured distance that I had to stop at about 200 ft. During the accident at 40 mph initial speed, I did not stop and hit stopped vehicle at about 10 mph while applying full pedal pressure with right foot.

When braking brakes feel spongy and braking distance has increased a lot.

Abs unit started pumping and would not shut off and had to be replaced at my expense.

Dealer and GMC denied any defect in brakes and denied damage claim and brake repair.

GMC has finally acknowledged there is an issue in their abs dump valve module for the first year 1999 new style pickups. I have had my truck in 5 times with 25 seperate total losses of brakes when you apply them. The fluid bleeds down allowing the brake pedal to go to the floor with a groaning noise. They just replaced this component for the first time. It was expensive so they waited this long to fix it. This is a saftey issue for sure. There should be a recall.

Tried to stop when someone about 50 feet in front of me stopped. The brake pedal went straight to the floor and there were no brakes. I ended up rear-ending the person because the brakes stopped working!!! we have had problems before with the abs almost making my husband go through stopsigns and such. We took the vehicle to the dealer and they "calibrated the abs tire size and ran the bleed and bleed system". Obviously it didn't work because we have been in 2 accidents because the brakes quit working both times!.

I believe there is a problem with this module. I have talked to service managers at 3 different locations and they have all said that the problem exist on these models. They have seen it on trucks with low mileage also. One of the service manager said that he believes there should be a recall on them. I have a hard time believing if you can call any dealership and tell them the problem I'm having they will all say it is a relay inside the module that has gone bad and the module must be replaced at $1000. ; therefore, there must be a problem with these modules shorting out. Also, everyday I pass up1999 and 2000 models trucks like mine and see one of the running lights out. I have personally repaced mine twice and it is out again, too me that,s a problem also. I hope to hear back from you soon.

The abs system has been disfunctional for three years. Contacted gm for the last two years. What happens when going 10 mph or less and applying the brakes the vehicle will not stop. When this first started it happened intermittently. Now, it does it all the time. There was a recall but it did not include this vehicle due to VIN. The consumer could feel the brake coming back when putting pressure on the brakes. It makes a sound. Had the abs system disconnected, this started happening on November 15, 2000. Consumer stated gm informed him they were doing recall repairs on brakes for salt states. However,the consumer took this vehicle to the ocean, and for others who use the vehicles there.

While coming to a stop sign or to a red light or when slowing down, consumer stepped on brake pedal and hit a bump. Pedal went all the way to the floor, resulting in extended stopping distance.

I was driving in a parking lot and applied the brakes, and the brake pedal went to the floor. I couldn't stop the vehicle and ran into some trees. This has occurred before in other gm vehicles that I have owned. I would have thought that they would have fixed them by now.

While pulling inside of the driveway and coasting along, engine just roared up and vehicle accelerated. Vehicle jumped over landscape timbers and hit basement wall. Also, front brakes locked up, but back wheels were still moving and in motion.

While driving over bumps braking system malfunctioned, causing brake pedal to push upward. There was no braking ability which caused a crash. Dealer was aware of the problem, but could not determine how to fix the problem. Please provide further information.