I've spent most of my life working on vehicles, so I can, usually, handle a wrench. My '89 Coachmen Horizon is based on a GMC 3/4 ton van. I've got a couple if issues I need to address before I take i...
Air bags, like the others said. The downside of air shocks, is they can lift, but are anchored in a stock location. I used air shocks on a pickup to level it out when towing a car trailer years ago. One day one side was sagging badly, thought the shock had blown or the air line leaked the air out. The extra weight had ripped the shock mounting through the spring perch. Fixed that, installed air bags, trashed the air shocks.