Question about 1997 Chevrolet K1500

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Oil gauge at start up run about 45psi then drops off 10-20 psi

The 1997 tahoe has 154000 miles and when you start it up it runs at
45-50psi then after it warms up the pressure drops to 10-20psi

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  • Anonymous Dec 20, 2008

    same problem with my 96 gmc 1500, I think it may be the oil sending unit



































































































































































































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  • 78 Answers

Thats normal on high milage engines. They do that because the cam and main bearings are warn.
Try an oil treatment.

Posted on Dec 27, 2008

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Past weekend check engine light comes on, engine sounds and feels fine. However the oil pressure is running slightly slow


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How low is "slightly low"?

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Oil pressure guage drops after engine warms up


Is it possible that you are using a different brand or weight of oil? 10w30 instead of 10w40 could potentially cause this.


Can also be caused by engine running warmer for some reason.

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You can try a heavier weight oil if you want it to be a little higher.

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