1988 GMC Sierra 2500 4×4 Oil Pressure Gage.

My oil pressure gage on my truck stops crashes when the truck is idle or while sitting at a traffic light. I replaced the oil pressure switch next to the dealer for a new unit, and it goes further to hop. Does anyone know what the problem is and how to fix it. The truck has a stock 350 engine with an automatic transmission.

Answers for The Question

  1. J M
  2. Scott W
  3. vip.auto