We have 2004 Chevy 3500 crew cab, long bed, 4x4 Duramax dually with 1990 Shadow Cruiser 9.5' hard side TC that weighs 2250 dry, lord knows how much when I'm done loading everything iall too often drag along. Ole Whitey gets 20 empty with a tail wind, 18 in wind, 15.5 pulling any work trailer, tractor,etc., and 15-15.2 with fully loaded camper. Hope it never dies cause in our mostly fixed income lifestyle and us being antiques already, the ability to purchase a new or new used truck of like durability and quality is nil.