While driving at highway speed, Service Traction Control/Stabilitrak warning comes on. Vehicle slows and if driver attempts to accelerate (using accelerator pedal), it causes severe lurching of vehicle. This makes the vehicle basically undrivable while in the middle of traffic. You must use emergency measures to pull over (potentially across multiple lanes) off the road and while trying to do that, you are in a very high risk state of being hit. The problem is reproduceable. The manufacturer and dealer service centers are aware of this problem and it has been reported by many owners of GM vehicles since at least 2010. Search the internet and you will find hundreds of incidents being reported.

- West Newbury, MA, USA

The contact owns a 2015 Buick Enclave. While driving various speeds, the vehicle suddenly decelerated. On two separate occasions, while driving approximately 70 mph, the vehicle suddenly decelerated without warning to approximately 10 mph. In addition, an unknown warning indicator illuminated. After driving the vehicle for a while, it regained speed and was able to be driven normally. The contact took the vehicle to conley Buick GMC (located at 800 cortez rd w, bradenton, fl 34207, 941-755-8531), but they were unable to locate a diagnostic code. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 75,000. Consumer stated problem still persists.

- Ypsilnti, MI, USA

The contact owns a 2015 Buick Enclave. While the vehicle was in neutral, it suddenly accelerated at a high speed. The contact stated that the accelerator pedal became stuck in position. The contact attempted to apply the brakes; however, the vehicle failed to stop. The contact applied the emergency brake and the passenger turned off the ignition. The contact drove the vehicle home. While driving to luther brookdale Chevrolet (located at 6701 brooklyn blvd, brooklyn center, mn 55429, 612-326-3850), the failure recurred. The dealer was unable to determine the cause of the failures. The vehicle was not repaired. The manufacturer was not made aware of the failures. The VIN and failure mileage were unknown.

- Columbia, MN, USA

Tuesday, 7/18/2017. I was coming over a small decline on local road in East brunswick, NJ. I applied the brakes and came upon the traffics light and traffics ahead and the vehicle shot foreword. Applying the breaks had no effect. In fact the car appeared to accelerate. I did not have enough time to avoid hitting the vehicle in front of me which caused that vechile to hit another. My vehicle accelerated vs braking when applying the brakes. Applying the brake had no or little effect in slowing the vehicle. Is there, or has there been, reports of similar problems with acceleration problems with the Buick Enclave, 2015 model ?.

- East Brunswick, NJ, USA

The contact owns a 2015 Buick Enclave. While the vehicle was idling in the driveway, the contact depressed the brake pedal and the vehicle accelerated. The vehicle drove through a neighbor's driveway and yard. The contact managed to place the gear in neutral and then in park. The engine continued to rev while in park. There was no warning indicator illuminated. The contact notified a local dealer where it was diagnosed that nothing was wrong with the vehicle and there were no recalls. The manufacturer was made aware of the failure, but had not responded. The failure mileage was 8,000...updated 06/01/16....updated 06/15/16

- Muncie, IN, USA