TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 35 MPH, THE PRECEDING VEHICLE STOPPED ABRUPTLY. WHEN THE BRAKE PEDAL WAS DEPRESSED, IT TRAVELED TO THE FLOORBOARD. THE CONTACT STARTED TO PUMP THE BRAKE PEDAL; HOWEVER, THE VEHICLE CRASHED INTO THE REAR OF THE STOPPED VEHICLE. THERE WERE NO INJURIES, BUT THE CONTACT STATED THAT HE FELT A BIT SORE. A POLICE REPORT WAS FILED. THE AIR BAGS OPERATED AS INTENDED. THE VEHICLE WAS TOWED TO QUEBEDEAUX BUICK GMC (LOCATED AT 3566 E. SPEEDWAY BOULEVARD, TUCSON, AZ, 85716) TO BE DIAGNOSED AND REPAIRED. THE CONTACT WAS INFORMED THAT THERE WAS A FAILURE WITH THE BRAKES, BUT WAS NOT GIVEN A DEFINITIVE DIAGNOSIS. THE CONTACT STATED THAT THE ESTIMATE FOR THE REPAIR WAS $22,000. THE REPAIR WAS STILL PENDING. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC). THE MANUFACTURER WAS NOT INFORMED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 78,000.