Back in 2004 GM changed the spec on the oil pump , I think they did this to help the cavitation issues. My 2001 had around 70 psi warm going down the road, the 2004.5 lly truck has right around 50 psi warm goind down the road. the LLY truck and the LBZ truck once the motor is broke in they are both the same. A long time ago Grumpy Jenkins said GM motors only need 10~12 psi of oil pressure for every 1000 RPM they turn! so if he is corect 25 psi is about all you need at cruise speed.
No Worries, RUN like some one else is paying for it!
93 c-2500 6.5td,96 6.5td x cab,01 GMC lb7 Xcab ,2004 lly crew cab ,2006 lbz crew cab,honda CBR1100xx,2003 polaris prox 700 , 2001 31' holiday rambler 10K lbs house on wheels!