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I have a 2005 Hummer H2, and all of a sudden now the oil pressure shows 80 psi (max). It has 100,000 miles on it. The oil level looks good! Any help on this?
Change the oil filter. It could be clogged. That would cause an increase in oil pressure. You dont wanna blow a main seal so do it promptly. If that isnt the problem, then you might want to consider consulting a local ASE Certified mechanic to help better diagnose the problem. Good Luck.
Check the oil pump screen this could be clogged. I hope this has helped, please provide a rating if this was of any help. Good Luck and have a great day.
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The oil pressure sensor is behind the intake manifold. Remove the plastic cover on top of the engine. The intake manifold is the large black plastic piece under the cover. Reach in behind the intake manifold to access the oil pressure sensor. The pictures supplied show the view from the back of the engine, as if you are viewing from the firewall side of the engine
when the engine is cold the oil pressure should read 60 psi
when the engine warms up at operating temp. it should read 12-16 psi while running at speeds 40+ it should read about 38-42 psi.
it it reads all that its not you sending unit
remember its a GM they use the poorest oil pumps on the market. usually I won't see a pump going out untill over 100K or so. its the same frame as the suberben, yukon, tahoe,denali.
4WD will make the job 3 times harder. If you do have the job done ask for a high volume pump
First thing that i would reccomend is switching to 5w30 oil since this is what GM wants you to run in your hummer. Next i assume your gauge is pegged out and doesn't fluctuate. You are going to have to take your hummer down to the local dealer and have a computer hooked up to see if the gauge is bad or the oil pressure sender is bad, more than likely the sender. thanks for using fixya !! have a nice day
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