Oil cluster at 70Psi

rafael805ox · Nov 21, 2024

I have a 2002 Chevy Tahoe rebuild motor.
When I turn the key too ON position, the oil psi is at 0. When I turn on the car it is at 70psi. Whenever I drive it it moves closer to the 80psi but doesn’t fully reach too it.
So my question is, do I need to replace Oil Sending Unit or Cluster ?

dadwagon95 · Nov 21, 2024

Good question... Maybe something in the circuit if the oil pressure sensor reads 0 before you crank the tahoe i wouldn't think it's in the cluster otherwise itd be off constantly

strutaeng · Nov 21, 2024

Probably the sender. When it failed on my 06 Suburban, mine just pegged out to max whenever I turned the key to on, before even starting the truck.

You can hook up a mechanical pressure gauge and tape the dial on your windshield and go for a drive to see what the actual pressures are, then determine what you should do next. Or just replace the sender. But testing is always a better approach before replacing things, of possible.

rafael805ox · Nov 21, 2024

strutaeng said:
Probably the sender. When it failed on my 06 Suburban, mine just pegged out to max whenever I turned the key to on, before even starting the truck.

You can hook up a mechanical pressure gauge and tape the dial on your windshield and go for a drive to see what the actual pressures are, then determine what you should do next. Or just replace the sender. But testing is always a better approach before replacing things, of possible.

When I put my car to the on position it’s at 0 psi. Once I turn the car on it’s at 70psi and while I’m driving moves closes to the 80psi but not sure if it’s the oil sending unit or if it’s my cluster or if it’s the sending unit harness.

rafael805ox · Nov 21, 2024

dadwagon95 said:
Good question... Maybe something in the circuit if the oil pressure sensor reads 0 before you crank the tahoe i wouldn't think it's in the cluster otherwise itd be off constantly

I will remove the cluster and inspect the board if anything is burned or I’m going to try too diagnose it and keep you updated. Thank you for your comment appreciate the help!!

tom3 · Nov 21, 2024

Any specs on the rebuilt motor? Usually a gauge or sender fails it's all or nothing seems like. And that sending unit is a real chore to get into and change out, and it's pretty expensive too. $15 dollar Chinese part goes for 60 - 80 dollars.

Oil cluster at 70Psi

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