TL* THE CONTACT OWNS A 2014 GMC SIERRA 2500. THE CONTACT STATED THAT WHILE REVERSING INTO A TRAILER, THE VEHICLE ACCELERATED INDEPENDENTLY WITHOUT ANY WARNINGS AND CRASHED INTO THE TRAILER. A POLICE REPORT WAS NOT FILED AND NO INJURIES WERE SUSTAINED. THE VEHICLE WAS TAKEN TO THE DEALER. THE TECHNICIAN WAS UNABLE TO DIAGNOSED THE FAILURE AND STATED THAT THE VEHICLE WAS FUNCTIONING UP TO SPECIFICATIONS. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 5,000.