ive got a 2015 chevy Silverado with 275/75/18 wranglers with a 2.5 leveling kit . What psi would you recommend for a trip from NM to AZ. Also any other maintainance would you consider before taking this trip... other than your basic oil change, filter and trans fluid check?

 

assuming this is a 1500 with no load with correct load range tire....anywhere from the tire-placard setting (located on the door pillar) to the max inflation on the tire is acceptable...don't go lower than the placard setting...if you load it up and pull a trailer...increase the pressure not more than the max tire inflation on the tire. if you like a firm ride go higher, if the ride is to harsh, go lower but keep within the parameters I have mentioned.

the tire will have a max mounting pressure for when its installed on the rim...don't confuse it with the max inflation pressure

 

Not pulling a trailer just taking the family to the in-laws. The tires are the durtrax, shpuld i keep them around 45-50psi.. considering the long road.