My heater started to shut off then Iâd turn it off then turn it back on then itâd come back on again. That went on for a few days. Started my truck in the morning and let it warm up for a few moments when I hear truck is on fire. The fire was in the cab of the truck. It was investigated and they said fire started in the right side of the dash which is where the faulty part is from what Iâve learned about other Chevy trucks same make model and year as my truck