Abs Brake Fail Problems of GMC Acadia

Warning indicators turn on for the system braking components such as abs brake failure, traction control and loss of engine power while accelerating between 35 to 50 miles per hour. Engine power decrease and the car speed and power is decreased with the loss of engine power warning. The car would just stop at this point. I contacted onstar each time this issue occurred to a diagnostic scan and each report indicated that same warning reported on the console. After 10 minutes the vehicle would re-start and I was able to drive it. This issue has re-occurred within 2 years and the GMC service department was unable to diagnose the problem but during the latest incident the mechanic had ruled the issue as low brake fluid. I've investigated this issue online on various blog forums for the GMC Acadia with the same description of braking system failure and others report the failure as an internal braking malfunction in which the master cylinder leaks into the brake booster. I'm concerned that this problem could potential become fatal is it recurs. The GMC service department refuse to look into my concern and investigate the problem. There are no visible signs of a leak because the leak is internal.

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The contact owns a 2009 GMC Acadia. The contact stated that when driving approximately 60 mph and under while coming to a stop, she recieved a warning from her onstar system advising her that the abs system failed and to service the vehicle immediately. The vehicle was taken to a dealer for diagnosis. After diagnosis they advised her that front brake pedals and brake pedal position sensor needed to be replaced. The vehicle was repaired. After having the repairs done the contact stated that the on star system in her vehicle advised her that she needed to have the vehicle serviced immediately. The vehicle was taken back to the dealer who stated that the failure recurred. The vehicle was repaired again. The manufacturer was contacted and they offered no assistance. The failure mileage was approximately 12,830 and the current mileage was approximately 58,000.

See all problems of the 2009 GMC Acadia 🔎.