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Oil Pressure

Discussion in 'Chevy Trucks' started by PlowRI, Nov 19, 2009.

  1. PlowRI

    PlowRI Junior Member
    Messages: 2

    92 GMC 1500 Oil pressure gauge is all the way up constantly. Has been that way for about 2 months. changed sending unit still the same comes down a little after driving for a while. can not figure out the problem.
  2. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    Your dash cluster panel may be grounding threw it . my 94 grounds threw my speedo cable. than it reads 85 at a stop
  3. mrfixx

    mrfixx Junior Member
    Messages: 9

    put a mechanical guage on it and compare the readings,your pressure relief valve may be stuck on the oil pump or the oil pump pick up could have timing chain nylon gears stuck in it..