Mechanics

GMC SAFARI ENGINE PROBLEM

1988 GMC Safari

Engine Mechanical problem
1988 GMC Safari 6 cyl Two Wheel Drive Automatic 90000 miles

when I drive on the freeway my oil pressure gauge says about 45-50 when I get off the freeway it jumps to 80 and fluctuates between 80 and 40 then I turn my van off and it stays at 45 again it seems like it is a sensor if so what is it called and where is it located
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Fitius
March 16, 2009.



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