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what is the cost to replace the oil pressure sending unit on 2001 Pontiac Bonneville

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My oil pressure gauge floats back and forth. Oil level is OK
(1) Answer
If the gauge is responding to changes in engine RPM you should get the pressure checked with a manual gauge.oil pressure is different from volume .you can be low on oil and still have good pressure if the engine is mechanically sound.Depending on the shops labor rate --1hr.labor and about$25.00-$35.00 for part