WHILE TRUCK WAS PARKED IN THE DRIVEWAY WITH IGNITION OFF EMERGENCY PARKING BRAKE ENGAGED. SOMEHOW TRUCK STARTED BY ITSELF AND DROVE RIGHT THROUGH GARAGE DOOR. DRIVEWAY WAS A FLAT SURFACE. ALSO, THERE WAS SOME SORT OF ELECTRICAL SMELL COMING FROM TRUCK. AS A SAFETY MEASURE OWNER HAS DISCONNECTED BATTERY. CHEVROLET HAS BEEN CONTACTED ABOUT THE PROBLEM. OWNER WAS WAITING FOR A RESPONSE. PLEASE PROVIDE ANY FURTHER INFORMATION.*AK