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Fluctuating oil pressure gauge

Tiny
WAYNE L
  • MEMBER
  • 2008 CHEVROLET TAHOE
  • 5.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
My oil pressure gauge when I crank up and drive goes from 80 to 0 then the alarm comes on then jumps back up and back down again. Keeps doing that. My engine is running normal and my oil is good what could be the problem?
Wednesday, March 11th, 2020 AT 6:06 AM

3 Replies

Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
Can you please confirm your engine size? There is no 5.6L motor for that vehicle. Thank you

Rich
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Wednesday, March 11th, 2020 AT 11:32 AM
Tiny
WAYNE L
  • MEMBER
  • 2 POSTS
5.3, I'm sorry.
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Wednesday, March 11th, 2020 AT 11:33 AM
Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
That's okay. It sounds like the oil pressure sending unit has failed.

See diagram below for location. To change it simply unplug the connector, unscrew it, screw new one in and replace the plug.

It is #1 in the diagram.

Let me know if this resolves your issue.

Rich
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Wednesday, March 11th, 2020 AT 11:50 AM

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