Three problems related to brake master cylinder have been reported for the 2006 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 GMC Sierra 1500 based on all problems reported for the 2006 Sierra 1500.
1. Rusted brake lines blowout. Fortunately mine happened in a parking lot,not on the turnpike,and requiring an emergency stop. 2. Clutch master cylinder plastic mounting flange separates when clutch is depressed,disabeling std. Transmission. On residential street.
Driving in residential neighborhood at approx. 25 mph. Upon engaging brakes to stop at stop sign, pedal suddenly became extremely soft and travelled nearly to floor. It took me a moment to figure out what was going on and I had to press with full force to stop. Drove slowly to nearest GMC dealer, not far away. Almost all of the brake pedal travel provided no response; the remainder of travel was soft and provided minimal braking performance. Diagnosis by the dealer was excessive corrosion on all solid brake lines and fittings. Burst/leakage on a line near the driver's side rear wheel was causing the soft, nearly unresponsive brake pedal. Recommendation by dealer was to replace all solid brake lines and fittings, from master cylinder to abs unit to each wheel end. I was told that only fixing the area that had burst would be too "risky" due to condition of the rest of the solid brake lines and that failure in another part of the lines was "probably going to happen. " the flexible/rubber brake lines and fittings at calipers/drums were "ok" and not replaced. Total charge: $1380. 46. This is a 7-year old vehicle with about 40k mileage that has been well-maintained in personal use/commuting. I have never experienced this failure before, on any vehicle at any age, including numerous vehicles 10+ years old all driven in ne ohio. I am grateful the brakes gave up when/where they did: at low speed and without any other vehicle (or pedestrian) around. I contacted gm and registered my complaint; they offered no relief or explanation (beyond "environmental" cause), though they expressed serious interest in my experience. I think this failure is unacceptable at this stage of a vehicle service life, regardless of whether it is used in the "salt belt. " please consider expansion of ea11-001 to later model years of gmt800-series vehicles.
The contact owns a 2006 GMC Sierra 1500. The contact stated that the master cylinder failed on his vehicle. While driving at an unknown speed, the brake pedal extended to the floor and the vehicle failed to stop. The contact rear ended another vehicle. There were no injuries. The front end, hood, and grill were damaged. The vehicle was towed from the scene and returned to the shop it was repaired at three months prior to the crash. The technician stated that the master cylinder was the cause of the failure. The contact has called different GMC dealers and repair shops to purchase a master cylinder, but there are none in stock. It would take a week for the part to arrive so that the repair can be completed. The failure mileage was 50,000.