oil is at the right level
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2006 GMC Yukon Question: what would cause the oil pressure to go to 80 psi?
Answer #1patrick mannion from Greg Solow's Engine Room, December 05, 2011, 19:47Master
Oil pressure will be higher when the oil is cold and at higher RPM, and lowest when it is hot and at idle. There are two engines manufacturer only gives min spec oil hot, 6psi at 1000 RPM, 18psi @2000 RPM, 24 psi @ 4000 RPM, same spec for both engines. I would verify oil pressure with a known good mechanical gauge.
Replyeuromech, December 06, 2011, 06:59Journeyman
Agree to use mechanical gauge to check oil pressure.Oil pump has a bypass valve to release excess pressure in engine.If bypass valve shot closed pressure builds up.Too high pressure could cause damage in engine .
Even oil filter could blow up.They are not designed to hold that kind of pressure.
Answer #2dale45 from Fairway Auto Repair, December 06, 2011, 15:10Journeyman
As said check the oil pressure with a manual gauge.
Other possibilities, bad oil sender (common), IPC problem.