HAD DENT REPAIRED ON DRIVERS FENDER, PICKED UP TRUCK FROM DEALER, DROVE 4 MILES HOME TO PUT IN GARAGE. NEXT MORNING AT 5:30 AM DISCOVERED TRUCK FIRE IN GARAGE DUE TO ELECTRICAL WIRING HARNESSES. EXTENSIVE DAMAGE TO GARAGE AND GARAGE FLOOR. EXTENSIVE DAMAGE TO TRUCK'S ELECTRICAL AND ENGINE AREA. DEALER TOLD ME IT IS A GM PROBLEM. NOW DEALING WITH GM LEGAL DEPT. BUT THIS COULD BE A MAJOR PROBLEM WITH ALL 2015/2016 TRUCKS, NO WARNING WHAT SO EVER PRIOR TO INCIDENT. VEHICLE IS A 2015 COLORADO NOT 1 YEAR OLD WITH 8300 MILES.