Oil pressure gauge

Tiny
TULPA
  • MEMBER
  • 2007 CHEVROLET SILVERADO
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
On my way home from work today I saw my oil gauge drop fast to zero. Stayed there for a bit then went up to eighty (max) then dropped again. Did this a few times then stayed on zero. I have oil, I am due for an oil change. So my question is do I have a bad pump or sensor? If so how can I tell which one?
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Tuesday, November 29th, 2016 AT 4:20 PM

11 Replies

Tiny
TULPA
  • MEMBER
Edit: I forgot to add my engine is not making any unusual noise, which leads me to believe it is the sensor.
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Tuesday, November 29th, 2016 AT 4:27 PM
Tiny
SATURNTECH9
  • EXPERT
Most likely it is the sensor. You would have to try a new sensor or get a oil pressure gauge test set and measure the actual oil pressure itself.
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Tuesday, November 29th, 2016 AT 6:31 PM
Tiny
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Okay, is that something an auto parts store can test for me or I have to buy one?
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Tuesday, November 29th, 2016 AT 6:55 PM
Tiny
SATURNTECH9
  • EXPERT
No that would not be something they would test for you. They might rent the gauge set at auto zone though. Honestly it is most likely the oil sending unit. I have seen them go bad on those and peg 80 psi the whole time the key is on.
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Tuesday, November 29th, 2016 AT 7:00 PM
Tiny
SATURNTECH9
  • EXPERT
Also, the gauge is a little tricky to screw the hose into where the sending unit goes. It is in the back of the engine on the drivers side by the firewall.
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Tuesday, November 29th, 2016 AT 7:01 PM
Tiny
TULPA
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OK I replaced the oil pressure sensor and it's saying I still have zero pressure on my dash Gage. Do I have to reset anything? Or am I looking at a bigger problem? I don't leak oil.
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Wednesday, November 30th, 2016 AT 5:02 PM
Tiny
TULPA
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And is it OK to drive With it reading 0? Still no strange engine sounds.
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Wednesday, November 30th, 2016 AT 5:14 PM
Tiny
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OK so I took the connector off and then put it back on and oil pressure is half way. So I guess it's done.
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Wednesday, November 30th, 2016 AT 5:32 PM
Tiny
SATURNTECH9
  • EXPERT
Ether a bad connection or bad connector to the sensor.
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Wednesday, November 30th, 2016 AT 7:09 PM
Tiny
TULPA
  • MEMBER
Well I'm pretty sure I have an electrical issue, my speakers cut in and out. Sometimes the back windows won't work. Once none of my Gage's worker for about ten min.
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Friday, December 2nd, 2016 AT 7:59 AM
Tiny
SATURNTECH9
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That's a separate issue from your oil pressure gauge
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Friday, December 2nd, 2016 AT 7:45 PM

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