NHTSA Complaint #10396592 — 2005 GMC SIERRA 1500

TRUCK IS NOW 6 YEARS OLD, JUST OVER 70,000 MILES. 3 TO 4 YEARS AGO (MAYBE MORE) THE #5 SPEED ON THE AIR SYSTEM BLOWER STOPPED WORKING. PERHAPS LAST SUMMER OR FALL, I CHECKED THE FUSES: ALL GOOD. I FINALLY FOUND THE WIRING HARNESS PLUG TO THE FAN AND FOUND THE #5 LINE HAD MELTED INSULATION AND THE SURFACE OF THE CONTACT PRONGS BLACKENED. I SANDED THEM AND REINSTALLED THE PLUG. ALL SPEEDS WORKED, FOR A WHILE, BUT SOON BECAME INTERMITTENT. THEN ALL SPEEDS STOPPED WORKING TOTALLY. AT LAST, I REMEMBERED THAT I STILL HAD AN EXTENDED WARRANTY WITH MASTERTECH, CHECKED IT AND WAS ABLE TO GET THE HARNESS REPLACED UNDER THE WARRANTY. THE WORKMAN WHO DID THE REPAIR SAID THAT THIS ITEM WAS A COMMON PROBLEM WITH THE 2005 SIERRA. WHILE I DO NOW HAVE A WORKING FAN CONTROL, I AM AFRAID TO USE THE #5 FAN SPEED. *TR