Originally Posted by
EpicCowlick
Someone can correct me, but I remember reading somewhere that the glow plug remains energized even after engine start and remains on for some period of time. I don't think that whether the truck starts with the plug hot or not has anything to do with this failure. I'm also interested to know if this failure was on a cab and chassis model.
You are correct, I believe they can stay on for over two minutes during warmup. They can also cycle on during extended idle periods to help keep the engine up to temperature.
This seems like a defect, plain and simple. A relatively catastrophic one at that, but you shouldnt have any trouble getting this covered under warranty. Please let us know how it goes!