I have a 07 Silverado crew cab LTZ with a 3&1 lift/leveling kit installed (1" lift on rear). The truck sags when I haul items and I was curious if anyone could recommend any air suspension Or something I could use to correct the drop that the back end experiences. I'd really like to be able to keep the truck level when I haul different things like trailers, 4 wheelers, or campers and not have to deal with a rough ride when I don't have a load.

Thank You in advance