brad dryden Posted January 31, 2012 Report Share Posted January 31, 2012 I have a 2001 chevy 1500 Silverado with a 5.3 4x4 for about 2 month or so now I have noticed my oil pump gauge jumps back and fourth a little. it has oil & the truck has 200,000 miles. heard some say it's a sensor but I would rather just replace it to be on the safe side. It does knock on cold starts but that's common with the 5.3s Quote Link to comment Share on other sites More sharing options...
LETMGROW Posted January 31, 2012 Report Share Posted January 31, 2012 I'd replace the pressure sending unit. That should take care of the problem. Common on these. Lynn Quote Link to comment Share on other sites More sharing options...
Shaun_300 Posted February 2, 2012 Report Share Posted February 2, 2012 Yes I agree with Lynn, have replaced those sensors before on the LS engines. Quote Link to comment Share on other sites More sharing options...
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