Question about 2001 Pontiac Bonneville

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Had oil changed 3 days ago...oil pressure had been fine until today. I drove about 3 miles and pressure became erratic and pegged high and then pegged low. It did this several times and then went to zero and stayed there. I checked the oil level and it is fine and there is no sign of oil in the coolant and the engine is running fine. Any idea what the problem is?? Is it just a pressure sending device or could it be the oil pump itself?? Thanks!!

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  • Anonymous Mar 28, 2014

    changing oil pump

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Your,e oil pressure switch is located close to your,e oil filter,it problemy disconnected the wires going to the switch.reconnect them.

Posted on Mar 29, 2011

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Probably just the oil pressure sender, at least that is the first thing I would replace.

Posted on Mar 28, 2011

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If running ok it's not the oil pump , this would cauce your lifters to be raddeling bad, and not running well at all. sounds like your gauge may be tring to go out. good luck to you.

Posted on Mar 28, 2011

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