TL* THE CONTACT OWNS A 2015 GMC SIERRA 2500. WHILE THE VEHICLE WAS BEING REVERSED WITH A TRAILER ATTACHED, THE BRAKE PEDAL WAS DEPRESSED, BUT FAILED TO OPERATE. THE CONTACT STATED THAT THE TRAILER CRASHED INTO THE AWNING OF THE RESIDENCE. THERE WERE NO INJURIES. UPON INSPECTING THE VEHICLE, THE CONTACT NOTICED EVIDENCE OF BRAKE FLUID LEAKING FROM THE BRAKE BOOSTER, WHICH ALLOWED BRAKE FLUID TO ENTER THE CABIN OF THE VEHICLE. THE VEHICLE WAS TAKEN TO PERFORMANCE CHEVROLET (LOCATED AT 3222 BEVERLY PIKE, ELKINS, WV 26241, TEL: (304) 591-1077) TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE BRAKE BOOSTER WAS LEAKING AND WAS 1,000 MILES OUT OF WARRANTY. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT CONTACTED OR NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 37,023.