oil pressure gauge low

  1. M

    Extreme oil pressure flux!! Help!!

    I have a 1998 GMC K1500 Z71 offroad with the Vortec 5.7L 350ci V8. Cold air intake True dual exhaust (no cats, dual in/single out Magnaflow muffler) Nothing else done to the engine this far. Idle is 600RPM, my oil pressure fluxuates from nearly 0 at idle and back to normal at WOT. Not sure...
    • MROY16
    • Thread
    • 350ci 5.7l exhaust oil pressure oil pressure gauge low
    • Replies: 2
    • Forum: GMC Sierra Forum
  2. E

    Dash oil pressure gauge reads low

    I have a 2000 Yukon Denali with 160000(almost half is interstate miles) Last week noticed my oil pressure gauge on my dash was up and down and would go to 5 pound if not 0 if idling or stopped. I called a friend and he said it was probably the oil pump. However I drove almost 40 minutes to get...
    • ExQuisitE
    • Thread
    • engines oil pressure gauge low oil pressure sensor oil pump oil sending unit
    • Replies: 6
    • Forum: GMC Yukon Forum
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