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Oil pressure low. 2005 6.0l gas. Motor going?

Discussion in 'Chevy Trucks' started by goel, Jan 5, 2013.

  1. goel

    goel PlowSite.com Addict
    Messages: 1,079

    2005 2500hd 6.0l gas w 70k miles

    On startup, for about 5 seconds the message shows "oil pressure low" and the guage does not move.

    Then the guage climbs and the message goes away.

    Have not really had any cold temps here yet, coldest has been -5 c the last couple days.

    First time the message shows up we did an immediate oil change.

    Message still shows up on cold start, then the pressure guage climbs and its fine

    Runs perfect.

    Thoughts and opinions?
  2. ceptorman

    ceptorman Senior Member
    from Indy
    Messages: 172

    I replaced the 4.8 ltr engine on my 2006 Chevy 1500 because of a faulty oil pump. One day the low oil pressure warning lights and buzzers came on, took the oil pan off, found a bunch of metal shavings everywhere, mechanic said probably from low oil pressure. The test for the oil pump is to connect a gauge and let the engine warm up, but that can destroy the engine also. Good luckThumbs Up

    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,286

    Probably the o-ring on the oil pump pickup tube
  4. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Agree once a mechanical gauge is installed and the slow pressure climb is verified. As the OP sensors get weak somewhat regularly as well.

    The LS engines have gotten a bad wrap for failing oil pumps but it's actually the pickup O-ring that is really the root issue. Which of course is replaced when the (supposedly) failing oil pump is.

    If a mechanical gauge verifies the slow pressure climb there's an easy test to then verify the pickup O-ring is the issue if you have to go that route.
  5. backupbuddy

    backupbuddy Senior Member
    Messages: 267

    Different subject on my 3500 8.1 pickup the temp guage goes up to the line between 210 and the red line while plowing and driving at between 35-40mph I've never let it go beyond that I would pull over and let it cool down since I'm afraid it will overheat now I have a 3500 8.1 dually and this never even gets up to the 210 mark????


    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,286

    Dirty radiator, thermostat, or fan clutch would be a start
  7. backupbuddy

    backupbuddy Senior Member
    Messages: 267

    Thanks Nichols I'll check into those.
  8. underESTIMATED

    underESTIMATED Senior Member
    Messages: 188

    My fan clutch was the main problem with my 03 2500hd.