Question about 2000 GMC Jimmy

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I keep losing oil pressure 2000 jimmy

I just had a new enginge put in after the last one lost oil pressure now it is happening again.

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  • Mike Butler
    Mike Butler May 11, 2010

    Same gauge or same sending unit as before? Have you attached a good known external oil pressure gauge to the engine to check it?



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I do not know your model of vehicle. But low oil pressure is usually an oil pump problem. If it is not sorted out soon, you will need another engine.

Posted on Dec 20, 2008


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One of four things is happening:

1. You are very low on oil, but probably you already checked that

2. The oil pump is not working, but the engine would not last long with no oil circulating.

3 The oil pressure sending unit is defective. This is a unit that send an electrical signal to the gage proportionate to the pressure it is measuring from the engine. If the pressure gage is bad then you get no signal and nothing is measured on the oil pressure gage. Also check the wires from the sending unit to make sure they are not frayed or broken.

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