hey guys.. in my 2006 gmc seirra my oil pressure gauge just pegged to 80 one day last week. the truck runs fine,no check engine lights or any other warnings... just today it started sweeping from 0 to 80 randomly. like i said before, no warnings, lights or performance issues.. i know its just an electrical issue, but my question is where?? the stepper motor? the pressure switch?? wiring between the two?? ANY input is appreciated!! thanks!!