Upgrade the ride on your 2011-2026 GM HD with ICON 2.5 Series shocks. Vehicle-specific valving delivers better damping, less body roll, and a more planted feel on any surface. Remote reservoirs keep operating temps low during extended off-road sessions.

Features

• Compatible with 0-3.5" of front lift over stock
• Extended travel length requires aftermarket front upper control arms and provides maximum wheel travel
• ICON’s internal “Bump Zone" increases damping by 20% to provide more control as the shock approaches full compression
• Nitrogen charged monotube design with remote reservoir
• Remote reservoir design improves heat dissipation to reduce shock fade during prolonged use
• ICON CDXS equipped for independent adjustability of high speed and low speed compression force for handling response and aggressiveness
• Premium grade 5WT shock oil for consistent suspension damping along a wide temperature range
• One-piece digressive piston design with vehicle specific valving for unsurpassed performance and ride quality on and off-road
• 7/8" diameter induction hardened, chrome plated shock shaft
• Press in, bonded rubber bushing/bar pin assembly damps road vibration and provides OE factory type fitment
• 6061 aircraft grade aluminum CNC machined components
• One-piece, hard anodized, impact extruded aluminum cylinders offer excellent corrosion resistance and consistent finish

Important Notes

• These systems are to be used with aftermarket upper control arms only
• Shocks Are Fully Serviceable. Lift Heights Indicated Are For A Stock Equipped Vehicle.
• Compatible with 0-3.5" of front lift on most Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD submodels. Compatible with 0-2" of front lift on Chevrolet Silverado 2500 ZR2 and GMC Sierra 2500 AT4X.

Manufacturer Description

ICON Vehicle Specific (V.S.) 2.5 Aluminum Series shocks are designed and built to give your vehicle outstanding performance off-road and a smooth ride on the street. These shocks are configured specifically for each application in both length and damping tune. Like all ICON shock absorbers, V.S. 2.5 Aluminum Series shocks are 100% rebuildable and 100% revalveable. For piggyback and specific remote reservoir applications, ICON’s unique use of a 6061 billet aluminum manifold a few inches below the top cap of the shock creates an internal “Bump Zone" that when used creates an additional 20% of damping force. This additional force helps prevent harsh bottom outs and controls the suspension when compressing at high velocity. ICON's exclusive Compression Damping Dual Speed (CDXS) valves are included for precisely dialing in your suspension performance. CDXS controls fluid flow under compression, with independent adjustability of high speed and low speed compression force. 10 discreet detented settings for both low and high-speed adjustment knobs allow separate adjustments for handling response and overall aggressiveness.