2003 GMC Yukon Denali XL: ABS light or ABS activating

Filed Sep 30, 2017 · Brakes, Driver assistance · 260,545 miles · GA

There is no warning code for the hydraulic brake booster when it starts to go bad that shows up on the ABS/odb scanner. You will be driving and all of the sudden your steering gets stiff, the brake pedal is hard to press and you can't stop as good as your used to in the vehicle. This issue can cause accidents if someone stops suddenly in front of you.

Filed Jul 24, 2014 · Brakes · 104,726 miles · FL

The problem: brakes failed while vehicle was running. After a hard brake at a stoplight and driving briefly, the brake pedal went straight to the floor barely stopping the vehicle. Brakes were extremely mushy to non-existent at times. Repair work: local gmc service department indicated the brake line had rusted out and they replaced it for close to $1,600. Per the invoice repairs included: brake system repair/labor, brake flush kit, pipe kit and fluid. (when asked about brake line issues later, the dealership stated they have never heard of any problems regarding them with gmcs.) how it happened: while driving with my wife and children in the vehicle, I had to break hard when I came around a bend to a red stoplight. Though the brakes worked, they felt like they were giving just a little after I finally came to a stop. We preceded another 15-miles with no incident and pulled into restaurant drive-thru. While sitting in the drive-thru lane with the vehicle in gear and my foot on the brake, all of a sudden my foot went to straight to the floor and the vehicle jumped forward. Thankfully there was enough space between my vehicle and the vehicle in front of me so that I didn' hit them. I immediately shifted it out of gear to stop the vehicle from moving forward. At this time I noticed a warning light had come on indicating to check brakes and that the ABS was off. I tested the vehicle in a nearby empty parking lot to see if it was still drivable and the brakes appeared to have only a little bit of 'stoppage' though the pedal was to the floor. I realized it took 50-100 yards to stop the vehicle with brake fully pressed and no gas when we were going 20-25 m/h.

Filed Apr 4, 2014 · Brakes · 176,000 miles · VA

Tl - the contact owns a 2003 gmc yukon denali xl. The contact stated that while driving 10 MPH, the ABS engaged without any warnings. The vehicle was taken to an independent mechanic. The technician diagnosed that the speed sensor was defective and needed to be replaced. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure and current mileage was 176,000. Pm

Filed Dec 30, 2011 · Acceleration, Brakes · 68,650 miles · MN · crash

When driving at low speeds (less than 10 miles per hour) or starting from a stop, the traction control will automatically engage when the gas pedal is applied. When the traction control engages, a total loss of input to the engine results and the vehicle does not move (it essentially stalls). I was almost struck in an intersection while waiting to make a left turn on a green light in early december of 2011. I was stopped in the middle of the intersection waiting to turn left. When I attempted to turn left, I gave the gas pedal some input, the traction control engaged, and my vehicle stopped because there was no engine input and was almost hit by an on-coming car. Luckily, this had happened before and I knew to either floor the gas pedal or to let off the gas entirely and then floor it again to get the traction control to disengage and get power to the engine. Another related issue is the ABS engaging for no reason. This also happens at low speeds (less than 10 MPH). When the ABS engages, the vehicle will travel another two to three feet prior to stopping. The ABS issue resulted in my hitting a pole in a parking lot. It took several years to finally determine what the issue was and it turns out it was a result of front wheel speed sensor corrosion and an increased air gap between the wheel speed sensor and the reluctor ring due to rust and debris built up on the sensor mounting surface. Gm acknowledged this with a safety recall (#05068c: product safety) for some vehicle model years 1999-2002. This is a serious safety issue and gm fails to recognize that vehicles like mine (a 2003) and even later models have the same problem. What is even more frustrating is that the dealership could not properly diagnose the problem for several years because they could not "replicate the problem ." I would encourage the nhsta to investigate this issue.

Filed Nov 27, 2011 · Brakes · 47,452 miles · LA

When attempting to brake to a normal stop at an intersection after exiting I-10 east at pascagoula, ms, the brake pedal went almost to the floor, the brake failure and ABS brake failure alarms came on both audibly and visually. Upon releasing and reapplying the brakes, I found I had sufficient brake function to stop from the relatively low speed in a longer than normal but reasonable distance. I then pulled into the nearest parking lot and started searching the yellow pages for the nearest gmc or chevrolet dealer as I was 160 mi from home and needed immediate repair. The dealership found that the brake lines were all severely corroded and that one or both of the lines going to the master cylinder had started leaking. They replaced the lines and attempted to bleed the brakes but they were not totally successful due to a combination of the sophistocation of the ABS system and the inexperience of the mechanic on duty at the time. After I returned home, I was able to find a more competent repair facility at 47,780 miles. They confirmed the severe corrosion of the entire brake line system, including the brake hoses and calipers. They replaced an additional left front brake hose and properly bled the brakes to restore total function. This held until a couple of months ago when I noticed fluid loss from the brake reservoir starting to accelerate. It took two months to find a shop that would do the work, but I now have an appointment this week to have an independent shop in baton rouge to replace all brake lines, hoses, etc as needed. When I had searched the web for recalls, etc, I noticed that the federal safety agency was studying this same issue, so that is why I'm filing this claim. This vehicle was sold and operated in new jersey for 36,000 miles until april 08 and has been in louisiana since then with approximately 85000 total miles. Let me know if you need any further information.