While driving the vehicle, the service "brake assist" light came on. i put my foot on the brake and had no brakes, then had limited brakes when slowly pumping then pedal went to the floor. that warning went off and the malfunction indicator lamp came on.
While driving the vehicle, the service "brake assist" light came on. i put my foot on the brake and had no brakes, then had limited brakes when slowly pumping then pedal went to the floor. that warning went off and the malfunction indicator lamp came on.
While driving the vehicle, the service "brake assist" light came on. i put my foot on the brake and had no brakes, then had limited brakes when slowly pumping then pedal went to the floor. that warning went off and the malfunction indicator lamp came on. i then had about 85% brakes.this has happened three times. the dealer and gm cannot find the problem. the first time i was on a highway. the 2nd time i was on a street in town and the 3rd time i had just pulled out of a driveway in a subdivision, after the car had not moved from friday to sunday.