To ensure compatibility, ICON is no longer offering GM 2500HD/3500HD upper control arms as individual components. Upper control arms can only be purchased in unison with ICON shock absorbers as a complete system. The included ICON Vehicle Specific (V.S.) 2.5 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 of ICON's Shock Absorbers, the V.S. 2.5 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. The ICON CDC Valve is an externally adjustable valve that restricts oil flow into the reservoir which creates 10 levels of compression damping force ranges.

ICON suspension systems lift your GM 2500/3500 HD while improving ride quality and performance. With endless hours spent testing and tuning our suspension components and shocks, you’ll have the best suspension solution on the market.

• One-piece digressive piston design with vehicle specific valving for unsurpassed performance and ride quality on and off-road
• All ICON 2.5 Series Piggyback and Remote Reservoir shocks can be upgraded to ICON's Compression Damping Control Valve (CDCV)
• ICON's internal "Bump Zone" increases damping by 20% to provide more control as the shock approaches full compression
• ICON's CDC Valve technology allows for 10 levels of high-resolution compression adjustability with the turn of a knob
• CAD plated, precision machined 1026 DOM steel shock body for maximum durability and corrosion resistance
• Premium grade 5WT shock oil for consistent suspension damping along a wide temperature range
• Remote reservoir design improves heat dissipation to reduce shock fade during prolonged use
• PTFE lined spherical bearings and application specific mounting hardware
• 7/8" diameter induction hardened, chrome plated shock shaft
• Nitrogen charged monotube design with remote reservoir
• 6061 aircraft grade aluminum CNC machined components
• CNC Machined Bushing Housings and Sleeves
• Black Semi-Gloss Powder Coat Finish
• Serviceable Dual Stage Bushings
• 1026 DOM Steel Construction
• Built-In Caster Correction
• ICON Delta Joint
• 100% Rebuildable
• 100% Revalveable
• CNC Bent Tubing