Got E rated tires installed, 80psi max, Tire guy said it would be better to run around 65-70 psi as tires heat up. Always thought I should run max cold rating 80psi. FW weight is around 9000 lbs hooke...
As Barry notes above, this is from my 2001 Dodge 2500 4x4's manual. Light load 45/40 Heavy load 55/70
I run 57/44 light and 57/70-75 heavy, because sometimes the pin weight has me pushing 6K a little on the rear. Tires are the optonal LT265/75R16E rated to 3415 each.