ICON V.S. 2.5 Aluminum Piggyback Front Shocks for 2011-16 GM 2500/3500 HD 6-8" Lift, Pair

The ICON V.S. 2.5 Aluminum Series Piggyback Front Shocks are a vehicle-specific pair built for 2011–2016 GM 2500/3500 HD trucks running 6–8 inches of front lift, tuned in both length and damping for that exact application. The 2.5-inch aluminum body, piggyback reservoir, and ICON's internal Bump Zone technology deliver controlled, fade-resistant performance on rough terrain and a composed ride on pavement.

Shipping: ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.

Built Around Your Lift and Your Truck

These shocks are configured specifically for the 2011–2016 GM 2500/3500 HD platform at 6–8 inches of front lift, not adapted from a universal shock and shimmed to fit. The length and damping tune are set for this application, so the shock works with the geometry of the lifted truck rather than against it. A one-piece digressive piston with vehicle-specific valving delivers a damping curve matched to the weight and travel of a heavy-duty platform, which matters when the truck is loaded or towing on uneven ground.

Internal Bump Zone: More Control Near Full Compression

ICON's 6061 billet aluminum manifold, positioned a few inches below the top cap, creates an internal Bump Zone that adds approximately 20% of damping force as the shock approaches full compression. That additional resistance is what separates a controlled landing from a harsh bottom-out on a rock ledge or a sharp dip at speed. The piggyback reservoir improves heat dissipation during sustained off-road use, reducing the shock fade that degrades ride quality on long runs.

Rebuildable, Revalveable, and Upgradeable

Every V.S. 2.5 Aluminum Series shock is 100% rebuildable and 100% revalveable, so the investment survives a future lift change or a change in how the truck is used. Premium 5WT shock oil maintains consistent damping across a wide temperature range. The 7/8-inch induction-hardened, chrome-plated shaft and impact-extruded aluminum cylinder resist corrosion over years of exposure to mud, salt, and weather. These shocks can also be upgraded to ICON's Compression Damping Control Valve (CDCV) for adjustable compression tuning without replacing the shock body.

Features

• Internal Bump Zone: 6061 billet aluminum manifold adds 20% damping force near full compression to resist harsh bottom-outs
• Piggyback Reservoir: nitrogen-charged monotube with piggyback reservoir for improved heat dissipation and reduced shock fade
• Vehicle-Specific Tune: length and damping configured for 2011–2016 GM 2500/3500 HD at 6–8 inches of front lift
• Rebuildable and Revalveable: 100% field-serviceable; compatible with ICON's CDCV upgrade
• 7/8" Hardened Shaft: induction-hardened, chrome-plated shaft with PTFE-lined spherical bearings and application-specific hardware
• Corrosion-Resistant Body: impact-extruded aluminum cylinder with consistent finish

Specifications

Who This Is For and Isn't

These shocks suit owners of 2011–2016 Chevrolet Silverado or GMC Sierra 2500/3500 HD trucks running 6–8 inches of front lift who want a vehicle-specific damping tune, fade-resistant performance on extended off-road runs, and a shock they can rebuild or revalve rather than replace outright.

These shocks do not fit GM 2500/3500 HD trucks outside the 2011–2016 model years, trucks with less than 6 or more than 8 inches of front lift, or any other make or model. They are front shocks only and do not include rear shocks, springs, or any other suspension components.

Common Questions

What trucks do these shocks fit?

These ICON V.S. 2.5 Aluminum Piggyback Front Shocks are built specifically for 2011–2016 GM 2500/3500 HD trucks with 6–8 inches of front lift. They are not compatible with other model years, other lift heights, or other makes and models.

How many shocks are included?

This listing covers a pair of two front shocks, configured as a matched set for the 2011–2016 GM 2500/3500 HD application. Rear shocks and springs are not included and are sold separately.

What is the internal Bump Zone and why does it matter?

The internal Bump Zone is created by a 6061 billet aluminum manifold positioned near the top of the shock body. As the shock approaches full compression, this zone increases damping force by approximately 20%, reducing the likelihood of harsh bottom-outs during high-speed off-road driving or heavy landings.

Can these shocks be rebuilt or retuned later?

Yes. These V.S. 2.5 Aluminum Series shocks are 100% rebuildable and 100% revalveable. They can also be upgraded to ICON's Compression Damping Control Valve (CDCV) for adjustable compression tuning, without replacing the shock body.

Is there a Proposition 65 warning for this product?

Yes. California residents should be aware that this product contains chemicals known to the State of California to cause cancer, birth anomalies, or other reproductive harm, per Proposition 65.