i have a 04 2500hd crewcab 4x4 Duramax i was just notice the grage run in between 50 psi to 60 is that right ? just sitin still and if im going about 65 its like 60 psi?

not mine. about 60 while cruising & about 30 at idle

I am similar to TNRGreene, 25-30 idle and 60 cruising.