oil pressure gage pegs high

[Rons05z71]

I tried searching and did not come up with too much. Has anyone had the oil pressure gage peg high when running. This started a couple of days ago and I am not too sure what is up. When I turn the truck off the gage goes to zero. I check the oil and it seems normal. With a high pressure condition I would expect an increase in temperature or even some engine noise. It does not depend on RPM. So is it a stepper motor or could it be oil pressure sensor in the back part of the engine. I tried to check the wires back there but there is not much room to do really anything. Thanks in advance

[scooby5121]

Crankcase breather/filter dirty,

May blow an oil seal if the crankcase cannot vent properly,,

IMO only

Scooby

[Black02Silverado]

Sounds like a sensor, or possibly the gauge in the dash. If you can hook up a scan gauge to the read what the PCM is seeing then it might point you in the right direction.

 

I've seen oil filters cause low oil pressure issues but no high readings, maybe change out the oil filter and see what happens. It isn't expensive and is easy to do.

[Rons05z71]

I just had an oil change done so it could be a filter, I dont think the 5.3 has a breather other than the pcv line but I can check that too. I am leaning towards the sensor or stepper motor for that gage. But there is one other thing That I need to check. Mice like my truck and I did find an acorn by my valve cover sooooo, I think I need to check again for some chewed wires,back by the sensor (not sure how, its in a bad spot) or under the underhood fuse box, They did it before on my rear taillights and the problem was in that fuse box. I was hoping someone had this sympton before and it was the gage, if it was anything else I think I would have had a failure of something big.

[Rons05z71]

FIXED!!! it was the oil pressure sensor, 43$ at advance auto and about 20 minutes with a either a 1"1/16 or 27mm long socket, an extension and a universal and it was done. its in a bad location but honestly it was pretty easy. I came up with doing the sensor since the gage did work, internet reading and discovered that the sensor is replaced alot and it was cheaper than going the more expensive route of a cluster replacement. I think I still will do a cluster replacement to replace some light bulbs and I think I really want a trans temp gage.

But the way I thought the stock sensor was garbage in comparison to the replacement. the stock one was aluminum and light, the replacement was brass and felt more substantial, well made I guess

[Rons05z71]

wow, need to read my posts before hitting post and fix the spelling errors and grammer