Brakes Failed problems of the 2004 GMC Yukon

While driving down road at approximately 45 mph, hit the brakes when a couple of deer jumped onto road and the pedal went to floor with no braking action at all. Had enough time to realize what had happened and hit the parking brake in time before reaching intersection to busy highway. Inspection afterward showed brake fluid on the frame near the driver side door where the proportioning valve is located. There was no warning of the failure and had been driving the vehicle around town most of the day. Have experienced brake failures on vehicles before and always had half the system remain operational enough to stop without problem. This appears to have been a single failure mode that caused the loss of braking or a simultaneous failure of multiple systems which should be unlikely but seems to happen with improbable regularity based on complaints posted.

The contact owns a 2004 GMC Yukon xl. While driving at any speed and applying the brakes, the pedal would stiffen and not moved downward completely. The failure recurred continuously. The vehicle was driven to a mechanic who diagnosed that the power assist brake system failed. The VIN was excluded from NHTSA campaign number: 04v045000 (service brakes, hydraulic). The manufacturer was notified. The vehicle was not repaired. The failure mileage was 130,000.

I was traveling on Saturday morning, in my dads 2004 Yukon luckily it was early enough not much traffic at the time, it was raining and I was not driving very fast normal speed on the highway is 40 miles per hour on us11 because of congestion and traffic lights, I was traveling between 30 and 35 mph because of rain, anyways a light changed and I had time to stop, but the vehicle did not stop the pedal went almost to the floor and the light came on stating brake failure, from that point I slowed down as slow as I could and tried to test the brakes, it would stop, but needed plenty of distance, so I slowed for a turn off, and when I got home, started to brake before entering the driveway so that I would not hit the garage or anything else, in fact I stopped the vehicle at the end of the driveway near the road.

Lost braking ability, brake peddle to floor, warning lights came on for brake failure, service immediately. Smoke coming from area of left front wheel. Pulled over, checked brake fluid, there was none.

The contact owns a 2004 GMC Yukon. While driving at 25 mph the contact engaged the brakes and the vehicle would not stop and caused it to crash into the rear of another vehicle. The failure mileage was 70,000. Between the two vehicles, four people sustained minor injuries. This was the second time the brakes failed. The vehicle was not drivable and will not be repaired. The current and failure mileage were 70,000.

: the contact stated while attempting to apply brake pressure at 65 mph the brakes failed resulting in a crash. This occurred on a normal road during normal braking without warning and a police report was filed. The vehicle was taken to the dealership for inspection. They were unable to duplicate the problem and no repairs were made.