C 2500 Suburban 2WD V8-5.7L VIN R (1996)
Oil Pressure Gauge: Testing and Inspection
Gauge Reads Low
1. Check oil level, add if necessary.
2. Turn ignition switch to the On position.
3. Remove oil pressure sensor lead at sensor, gauge should read high.
4. If gauge stays low, remove sensor lead at gauge. Gauge should read high. If gauge reads high, locate and repair short to ground between gauge and
sensor.
5. If gauge still reads low, replace cluster.
6. With lead removed at sensor, connect an ohmmeter to sensor. With engine stopped resistance should be one ohm, and approximately 44 ohms with
engine running.
7. If sensor reads significantly lower than 44 ohms with engine running, replace sensor.