To Durb, those pressures on the door jamb are arbitrary......but generally safe, for those that don't know how to adjust for tire size, weight, conditions. That's why the newer 2500s all got 80 psi idiot lights in them when most people on mOst days (running empty) would be much better served with significantly lower tire pressure.
To everyone else, some good reccomendations, some not applicable, like those quoting pressures for a dually with pizza cutter tires when OP is asking about a srw truck with presumably different tires.
Tire size and capacity also play as large a role as actual applied weight.
