Wait, what?
Martin
Yeah, my 2012 Sierra had an air intake heater failure which caused it to latch on and remain on even after the truck was turned off and the key removed. With no air flow the plastic on the heater can get hot enough to burn. About an hour later my truck had a full on engine fire going and by the time the fire department arrived it had spread into the cab and the burnt to the ground. It was a total loss along with everything inside of it.
I had the exact same failure about a year ago but I was outside when the smoke started rolling out from under the hood and was able to put it out by disconnecting the batteries. Ripping the control wiring out didn't stop it, so the relay definitely latched on.

