2008 Chevrolet Tahoe Hybrid Brakes Problems

“Vehicle shuts off randomly from stop to auto start transition feature. Modules has been updated to latest version. Problem still accumulating hybrid batteries soc 60% battery temperature inlet 81f outlet 107f 340volt total charge in the event of problem accured. Aux trans pump and module replaced new. Hybrid battery cooling fan replaced new. Problem still exist dealer cannot find the problem or they dont want to deal. In the even of shut off I loose brake power and steering power which I can not stop or steer the vehicle to pull over this results in serious safety issue.”

“While approaching an intersection with vehicles approaching from several directions, I applied my brakes but found I had none. Fortunately, the other cars noted my situation and stopped for me. There was a GM dealer one block away, so I slowly drove there. I turned off the ignition. I re-started the vehicle and found I had brakes again. I slowly drove to village Chevrolet which was not far away. I was told the ebcm and bpmv were not builing pressure for the booster. They serviced and reprogrammed and delivered the vehicle the next day. …”

“When pushing the brake pedal the vehicle started to shake/vibrate as if the ABS was activated when I got to work, and even when place the vehicle in to park and pushed the brake pedal the same vibration happened. I rushed to the dealership had to drive on hwy to get there kept at min speeds as possible and not using brakes at all. While approaching an exit ramp, I applied my brakes they locked up ( it really scared me) then the ABS vibrating came back again. As I was approaching my house and hit the brakes again found I had none had to use emergency foot brake to stop. …”

“Started car, put in gear, depressed brake pedal, and it went nearly to the floor. No vacuum assist and the car was very hard to stop even at a rolling speed. The following lights illuminated: check engine light, stabilitrack indicator light, ABS warning light, brake system warning light. The following displayed on odometer screen: service stabilitrack, service traction control, service brakes soon. Vehicle has been at dealership for 2 weeks, with repeated calls to GM engineers, who first recommended replacing the master cylinder, which cost $1000 and did not fix the problem. …”

“The contact owns a 2008 Chevrolet Tahoe Hybrid. While driving 20 MPH, the brakes failed to engage without warning. In order to stop the vehicle, the emergency brake had to be engaged. The vehicle was taken to the dealer. The technician was unable to diagnose the cause of the failure. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 107,000.”