[NoMoGMPG]

Originally posted by leenigen:
Origanally you said bad plugs "for one". What could be other reasons. I checked all the plugs again now that they are out. There are still two that fail but they don't look any different. I just want to prevent this from happening again so I'd like to check all the reasons the controller could have failed again.

Mostly, failure is due to a direct short if not caused by bad glow plugs. The power stud is located very close to the body and can make contact to ground if your body mounts are compressed or have excessive body flex. Check for burn/arc marks close to where the controller is mounted. Also, use a GM controller, not the aftermarket ones, I don't have alot of faith in the aftermarket ones.