GM Astro/Safari 1985-1996 Repair Guide

Negative Oil Pressure


When the engine presents no oil pressure, replace or repair the following items or systems, as necessary:

Low oil level in the crankcase.
Broken oil pressure gauge or sender.
Blocked oil pump passages.
Blocked oil pickup screen or tube.
Malfunctioning oil pump.
Sticking oil pressure relief valve.
Leakage of the internal oil passages.
Worn (loose) camshaft bearings.