BUNDLED WIRING UNDER DASH STARTED SMOLDERING WHILE VEHICLE WAS PARKED IN DRIVEWAY, HAD BEEN SITTING FOR ABOUT 48 HOURS. I PULLED MUCH OF THE DASH APART TO MAKE SURE THERE WASN'T AN ACTIVE FIRE. WHILE BEING REPAIRED AT LOCAL CHEVY DEALER. WIRING ACTUALLY CAUGHT FIRE BURNING THE REPAIR TECHS HANDS. WHEN I ASKED WHAT COULD HAVE CAUSED THIS, THEY JUST TOLD ME THAT SOMETIMES IT HAPPENS AND THEY DON'T KNOW WHY. *TR