ICON's Rear Leaf Pack provides improved ride quality for 2011-2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD pickup trucks while maintianing factory rear ride height. This full replacement leaf back lowers the rear spring rate approximately 20% compared to stock as well as shifts the overload transition point higher in the suspension travel to improve small bump compliance. Compatible with the full range of ICON Vehicle Dynamics shock absorbers as well as stock and other aftermarket options, this makes the leaf spring an excellent option for trucks that that do not regulaly tow or haul heavy loads and the best ride quality is desired.