THE MAIN BATTERY CABLE RUNNING FROM THE BATTERY LOCATED BEHIND THE PASSAGER'S SEAT WAS RESTING ON A BOLT FROM THE FRAME. THE THREADS FROM THE BOLT CUT THROUGH THE BATTERY CABLE AND SHORTED OUT THE ELECTRICAL SYSTEM CAUSING THE FLOOR MATTING TO CATCH FIRE WHILE THE VEHICLE WAS IN MOTION. THE ENGINE SHUT DOWN, CAUSING A LOSS OF POWER STEERING AND BRAKES. SINCE IT WAS THE MAIN BATTERY CABLE THE CONNECTS DIRECTLY TO THE BATTERY WITH NO FUSE, THE SHORT CONTINUED TO SPARK. IN THE PARTICUAL VEHICLE THE BATTERY IS LOCATED INSIDE THE VEHICLE, BELOW THE PASSAGER SIDE REAR FLOOR. THE POSITIVE BATTERY CABLE RUNS FROM THERE TO INSIDE THE ENGINE COMPARTMENT TO THE ALTERNATOR, WITH NO FUSE IN BETWEEN. I TOOK THE VEHICLE TO THE DEALER AND THEY SAID IT WAS NOT A WARRANTY ISSUE. I RAISED THE QUESTION WITH THEM ABOUT A RECALL AND GOT NO WHERE. I DID SOME SEARCHES ON GMC BLOG SITES AND THIS ISSUE HAS HAPPENED ON A NUMBER OF OTHER VEHICLES, ONE LEADING TO A WRECK. LUCKILY I WAS AT A STOP LIGHT TURNING WHEN IT HAPPENED TO ME. IF THIS WOULD HAVE HAPPENED ON A FREEWAY AT FREEWAY SPEEDS, THE STORY COULD HAVE BEEN MUCH WORSE. *TT