Question about GMC Sierra 1500

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Low oil pressure

I have a 99 GMC Sierra with the 4.3. It has 196000 miles and runs great. I recently had to replace the distrubutor. After I buttoned everything up I fired her up checked everything went for a test drive and when I got home I had no oil pressure so I parked it. I have replaced the oil pump and the oil pressure switch. I checked the pressure with a mechanical gauge and still have almost no oil pressure. I don't get it never had any oil pressure issues before. It all started after changing the distributor. Also when I dropped the oil pan I had alot of sludge in the bottom. My truck doesn't rattle, knock or anything it runs perfect other than low oil pressure. Is there anywhere else I can check oil pressure?

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  • yadayada
    yadayada May 11, 2010

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Yes, the distrubutor runs the oil pump. Try sliding the old one back in and see if you get pressure back.
But I'll warn you you may have caused lots of problems running it with no oil to the bearings.

Posted on Jul 01, 2009

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