oil preasure gage drops, then goes back to normal

Discussion in 'Chevy C/K Truck Forum' started by Kdubb2208, Sep 15, 2010.

  1. Kdubb2208

    Kdubb2208 New Member

    hey everyone, i am new to this site.
    my oil Gage drops down to zero, but only for a few seconds and then goes back up to normal, does anyone know why this is going on? thanks alot,
  2. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Id change the OIL pressure sending unit on the back of the block. it is a common problem with these trucks.
    However YEAR, MAKE, MODEL, would help to better ID any other potential problems. Also motor size and tranny to.
  3. William Drexler

    William Drexler New Member

    I had this happen on my 94 Ck1500 5.7 350. It would fluctuate alot and I started to hear an engine knock, well i took it to a mechanic and he did an oil change and used lucas oil stablilzer, fixed the oil pressure and engine knock, 3 months later happened again did an oil change and good as new so that could be an option if you have other issues along with the oil pressure going all over the place
  4. wisoutlaw

    wisoutlaw New Member

    I had this happen on my '93 Sierra with the 5.7. It turned out to be the semi-syn oil the dealer was using. It was too slippery for the pump and when you accelerated hard enough the pressure would drop. I switched to conventional oil and the problem went away.

  5. 04RegencyRst

    04RegencyRst New Member

    I have a 04 Chevrolet Silverado RST has a 6.0 engine 26,000 miles and my oil pressure gauge has been dropping and going back to normal the engine sounds normal... Would like to know if you guys may know whats wrong with it
    Last edited: Nov 25, 2011
  6. The Heater

    The Heater Rockstar 100 Posts

    Gauges in newer vehicles are electronic, not mechanical. A lot of things can make that happen, none of which may be any indication that the oil pressure is actually low. It could be simply a bad ground connection. If the engine were doing something that bad at 26,000 miles, you would hear noise.
  7. Pikey

    Pikey Moderator Staff Member 5+ Years ROTM Winner 5000 Posts

    How far is it dropping? Could be the stepper motor that moves the gauge.

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