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  1. #1

    Default duramax oil pressure problem

    2004 duramax 2500hd, the oil pressure guage started reading 25 psi higher last week than normal. now it drops way down when i accelerate only when the truck is warmed up. damn thing is full of oil, it was a half quart low, i added a whole quart yesterday. runs good, has 225k miles, new injectors, all the other guages are good. anybody know what is up with this? thx mike

  2. #2
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    dwill3015's Avatar
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    You may need a new oil pressure sending unit if it reading like that. Generally it reads lower (30-40lbs) and when you accelerate it goes up past 60lbs.
    Darcy
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

  3. #3

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    i guess i'll try that first, mike

  4. #4
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    I would check it with a manual gauge before you replace the sending unit. This will tell you if the gauge is reading accurately or not.

    Mike

  5. #5

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    it was the sending unit after all, thanks, guys

  6. #6
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    Glad it was something simple!

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