Originally Posted by WEWILLE
Do what the sticker in the door says, its probly 65.
More than likely that truck came out with 235/85/16 and has probably been switched to a different size. The tire placard on the door will not be correct if the tire size is different. If it is a 265/75/16, 40 PSI works perfect. Good mileage out of tires and no abnormal wear.