I STARTED VEHICLE TO WARM UP WHILE AT OUR CABIN IN NORTHERN MICHIGAN. AFTER ABOUT 3 MINUTES OF RUNNING I NOTICED A BAD ODOR COMING FROM THE VEHICLE. UPON INSPECTION OF THE VEHICLE I DISCOVERED SMOKE INSIDE OF THE VEHICLE. I MOVED IT AWAY FROM MY GARAGE AND SHUT IT OFF. I OPENED THE DOORS AND THE LEFT REAR SPEAKER NEXT TO THE SEAT WAS ON FIRE! I WENT INTO MY CABIN,GRABBED A FIRE EXTINGUISHER AND PUT OUT THE FIRE. *NM