woodbutcher
Well-known Member
I bought my 2013 GMC Sierra 1/2 Ton, 2WD with 5.3 engine new in 2013, and the oil pressure gauge showed low readings from day one. When it was cold it would show less than 40 psi, and after warm-up it was down around 30. I have 35K miles on it now, and oil pressure readings are probably 30 psi at best. The factory gauge doesn't show numbers, so I'm guessing. I'm hoping the O-ring on the pickup tube is the problem. Replacing it would be easier than replacing the pump, but I'll probably hire it done. Does anybody have experience in comparing the cost of this job to doing the oil pump replacement at the same time?
Butch
Butch