Question about 1995 Buick Park Avenue

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1995 Buick Park Avenue when motor gets warm oil pressure starts to drop, no noise in engine, no rattling or knocking the oil pressure just drops what could cause this, oil sending unit/oil pump how can I tell what does it usually cost

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These sending units are known to fail, a replacement is about $25. I had a Bonneville that did the same thing. The only real way to test it is to remove the electronic sending unit and test it with a manual gauge. In my case I had 40 psi of oil pressure with the manual gauge but the dash would read 5-10psi.

Posted on Mar 26, 2011

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