It has the 6.0L with 205K miles. I'm thinking the oil pressure is on the low side and thought this might help some, at least before replacing the oil pump. Posted these on a Chevy truck forum and the consensus was not to worry about it.
When I first start it cold (70F) it shows just under 40. And I could swear just 15-20,000 miles ago these numbers were 5-10 psi higher. I put in a new sender just to be sure and checked the pressure with a manual gauge.
idle
cruise
downshift
When I first start it cold (70F) it shows just under 40. And I could swear just 15-20,000 miles ago these numbers were 5-10 psi higher. I put in a new sender just to be sure and checked the pressure with a manual gauge.
idle
cruise
downshift