I have a 2005 Silverado. I changed the oil a few days ago and the pressure gauge read fine for 2-3 days after the oil change. Today it has been pinned at 80psi. It pins at 80 psi even when you just turn over the key without starting it as well and stays at 80 psi when running. Has the gauge just gone bad? The truck runs fine.
Oil pressure gauge?
- Thread starter Oneye
- Start date
The gauge/sensor works off resistance. Sensor is probably bad, but you can test it to see if there is a grounding issue. Unplug the connector to the oil pressure sensor with key on engine off when the gauge was at 80 psi, if the gauge goes to zero then it's the sensor. Not a GM guy but I think it's a pretty common, have seen it on diesel sites.
marksjeep
Well-known member
Bad sending unit (sensor) or bad stepper motor behind the dashboard. Steppers are very, very common failures in GM trucks. I replaced all of them on my '03 Silverado due to erratic gauge readings.
dan.kirkpatrick
Well-known member
id say its oil pressure senser or poor connection at sending unit,{pretty common}check your connections or see if you bumped any wires when you did your oil change.
Is there anything that isn't nowadays? I recently replaced a 3" section of rubber hose and had to alternate between crawling under and working from above.
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