Jeremy Babb |
09-27-2014 03:12 PM |
Low oil pressure opinions
I just bought a 2003 GMC 2500hd with the Duramax and the 6sp manual and 126000 miles. The very next day, I changed the oil, filter, fuel filter, and air filter. Took it down the road and have low oil pressure with the message flashing "oil pressure low". At 1500 rpm or so, the psi is about 30, 7-9 psi at an idle when the truck is warmed up. When the truck is cold it will idle around 60-70 psi. A friend of mine has a Snap-on scanner and we verified that the gauge isn't the problem because his scanner was showing the same pressures. I then replaced the oil sending unit hoping that was it. No help. Now I am thinking oil pump. My theory is the truck has had a hard life and the main bearings and the rod bearings are worn, letting pressure leak by. I figure if the main and rod bearings are replaced my pressure will come back but also put a new pump in to be safe. Any help on this matter would be greatly appreciated! Thanks in advance.
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