Ride comfort is the very best reason to install a highly engineered air ride suspension kit from Kelderman Manufacturing. This bolt-on kit for GMC 4500 and 5500 trucks smoothes out the bumps in the road while keeping the truck bed level, even with the addition of heavy payloads. Uniquely designed with an electronic automatic height control unit with an air dump feature, Kelderman's kit provides the ultimate in air ride comfort and operator control.