Tl* the contact owns a 2011 gmc savana 1500. the contact stated that while reversing, the vehicle began to accelerate independently. the contact engaged the brake but the vehicle continued to attempt to accelerate. the contact then put both feet on the brake pedal but was unsuccessful in stopping the vehicle, as she crashed into a wall at 14 mph. the vehicle was towed to a dealer for a diagnosis but the dealer offered no assistance. the manufacturer was notified and also offered no assistance. the vehicle had not been repaired. the failure and current mileages were 5,000.