Question about 1996 Chevrolet Tahoe

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Oil pressure drops to 0 at idle

The oil pressure drops to 0 at idle and oil light comes on but goes up with rpms. has a little knock at start up and at idle. little note that head gasket was just replaced a moth ago. could it be the main bearings? it is a 1996 chevy tahoe with 265000 miles

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  • Jason Decher Apr 16, 2009

    when driving oil pressure is about 25 but before the head gasket blew it was running around 45. now every time i come to a stop it drops down to 0 and my check gauges light comes on,but as soon as i start driving again or rev the engine up oil pressure goes back up and the light goes off

  • Jason Decher Apr 17, 2009

    I can try replacing the oil pump and see what happens. thanks for the help. i will let you know if that fixed the problem

  • Jason Decher Apr 29, 2009

    Thanks for the feedback vwdan the oil was changed when the gasket job was done and a week after words.i will check the pick up tube and sending unit might replace all that just to rule it out. i will change the oil again and look at the filter to see if there are any chuncks stuck.

  • Devon Sacco
    Devon Sacco May 11, 2010

    Replacing the oil pump is not a possible solution for you?

  • Devon Sacco
    Devon Sacco May 11, 2010

    Possibly the oil pump needs to be replaced?

  • Anonymous Mar 18, 2014

    Since I had the head gasket replaced my check engine light is coming on and the oil pressure light still comes on what would cause this

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OOO not good sounds like some of the head gasket got stuck somewhere, or the gauge or sender is bad or got knocked around when repairing the head gasket. I would check that first. If that checks out will need to drop the pan to see if something got stuck in the pickup tube,might as well change the pump while you are there. Or worst case some thing wrong with gasket job impeading oil flow back to bottom of the engine. Was the oil and filter changed ?if so pull out filter and see if an chunks are stuck in it now. And change oil and filter again. Sorry that was out of order I had a long day

Posted on Apr 24, 2009

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