I would drop the pressure to a more reasonable pressure and drive it empty a few times. The tires should break in with some heat cycles, city driving might not be bad as the speeds are lower and you get lots of corners.
A safe setting, unless you carry a lot of stuff in the truck, would be for 4,000 front and 3,100 rear. Assuming a 265/70R17 try 40 front and 35 rear for a few city drives and see what happens. Those pressures would be good up to 65-70 for short stretches, if you do lots of high speed then up those pressures by 5.
You will have to increase pressure when towing.
