Oil Pressure drops why

Asked by Paul Feb 03, 2021 at 02:01 PM about the 2007 GMC Sierra 1500 SLT Ext. Cab SB 4WD

Question type: Maintenance & Repair

new oil pump, new oil sending unit, engine rebuilt 6 months ago. oil pressure
now starts at 20 psi and drops to 5 to 8 psi. why

2 Answers

F_O_R answered 3 years ago

A bad rebuild? If bearing clearances are too loose you won't get good oil pressure. What exactly was done in this so called "rebuild"?

Mark helpful
90

Feedstoreguy answered 3 years ago

Hook a manual oil pressure gauge up to the engine and read the true pressure. Sometimes The gauge cluster can fail on those trucks.

Mark helpful

Your Answer:

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