NHTSA Complaint #10596077 — 2003 GMC DENALI

ON JUNE 4, 2014, DRIVING ON A CLEAR, DRY AND SUNNY DAY IN MY 2003 GMC SIERRA DENALI PICKUP TRUCK. ON VIRGINIA DRIVE HEADING EASTBOUND IN MONTGOMERY COUNTY, PA, AT 32 MPH; WITH NORMAL BRAKING ACTION HEADING INTO A CURVE, THE BRAKE PEDAL SURPRISINGLY WENT TO THE FLOOR AND EXPERIENCED LOSS OF BRAKING. FORTUNATELY I WAS ABLE TO NEGOTIATE THE TURN, NARROWLY ESCAPING RUNNING OFF THE ROAD, ONLY BECAUSE IT WAS TWO LANE ROAD IN EACH DIRECTION AND THERE WAS NO NEARBY TRAFFIC AT THE TIME. BRAKE FUNCTIONALITY NEVER RETURNED EXCEPT FOR MINIMAL CAPABILITY NEAR THE END OF PEDAL TRAVEL. PRELIMINARY INSPECTION AFTER PARKING THE VEHICLE INDICATES THE BRAKE LINES SHOWED RUSTING IN GENERAL ON THE VEHICLE (AND ALSO THE ADJACENT FUEL LINES), MOSTLY NEAR THE FRONT SECTION OF THE VEHICLE; AND THE FAILURE SEEMED TO BE IN THE HOSE-TO-LINE COUPLING FROM THE BRAKE VALVE NEAR THE MASTER CYLINDER TO WHAT APPEARS TO BE THE ABS CONTROL ASSEMBLY MOUNTED ON THE FRAME UNDER THE DRIVER'S SEAT AREA. THE LINES IN THAT SUSPECTED FAILURE AREA APPEARED MOST SERIOUSLY RUSTED AND BULGED. CURRENTLY SPEAKING WITH A GMC DEALER TO UNDERSTAND THE REPAIR OPTIONS AND POSSIBLE RECALLS. *TR