Firestone 01-10 GM C2500HD/C3500HD Analog Ride-Rite All-In-One Kit (W217602869)Firestone's original helper spring kit is designed to level loads when you are hauling or towing to eliminate squat and return the vehicle designed ride height. Paired with a single path analog compressor kit and no drill mounting plate. A true All In One kit with everything you need in one box for a quick and easy install. This Part Fits: Year Make Model Submodel 2001 2004 Chevrolet Silverado 2500 Base 2001 2004 Chevrolet Silverado 2500 LS 2001 2004