
Questions about fitment?
Talk to a TRU specialist
We’ll help you verify fitment before you buy.
Veteran-owned · Austin, Texas · Mon–Fri 9:30a–11:00a & 1:00p–5:30p CT
Important notes before you order
- APPLICATION NOTE #13: Compatible with 0-2" of rear lift on most models
- APPLICATION NOTE #15: Compatible with 0" of rear lift on Chevrolet Silverado 1500 Trail Boss and GMC Sierra 1500 AT4
- APPLICATION NOTE #198: An iOS operated device is required to run ICON Intelligent Control app
- APPLICATION NOTE #204: Also requires installation of applicable IIC kit and CDEV front shocks
- APPLICATION NOTE #327: Not compatible with Silverado 1500 ZR2 or Sierra 1500 AT4X submodels
- APPLICATION NOTE #331: Silverado 1500 and Sierra 1500 submodels equipped with Adaptive Ride Control also require part numbers 71021 and 71022
- APPLICATION NOTE #342: Silverado 1500 and Sierra 1500 submodels equipped with Adaptive Ride Control also require concurrent installation of aftermarket front coilovers
Specifications
| Brand | ICON Vehicle Dynamics |
|---|---|
| Part number | 77703EP |
| UPC / GTIN | 840103437637 |
| Active or Passive Suspension | Active |
| Adjustable | Yes |
| Adjustable Compression | Yes |
| Adjustable Damping | Yes |
| Adjustable Rebound | No |
| Boot Included | NO |
| Bore Diameter | 2.25 IN |
| Compressed Length | 15.55 IN |
| Cylinder Color | Gray |
| Cylinder Diameter | 2.5 IN |
| Cylinder Material | Aluminum |
| Damping Adjustment Type | Electronic |
| Damping Type | Oil |
| Extended Length | 24.88 IN |
| External Reservoir | Yes |
| Gas Charged | Yes |
| Grade Type | Performance |
| Includes Bump Stop | No |
| Lower Mount Type | Eyelet |
| Mounting Hardware Included | Yes |
| Reservoir Type | Piggyback |
| Shaft Diameter | 0.875 IN |
| Shaft Material | Chrome |
| Shock Absorber Body End Measuring Point | Center of Eylet |
| Shock Absorber Rod End Measuring Point | Center of Eylet |
| Stroke Length Rear | 9.33 IN |
| Tube Outside Diameter | 2.5 IN |
| Upper Mount Type | Eyelet |
| Valving Type | Digressive |
| Country of Origin | US |
California Proposition 65 warning applies to this product. www.P65Warnings.ca.gov
Features
- ICON's CDE Valve technology allows for in vehicle adjustment of compression damping settings and active adjustment via the ICON Intelligent Control (IIC)
- ICON’s internal “Bump Zone” increases damping by 20% to provide more control as the shock approaches full compression
- Remote reservoir design improves heat dissipation to reduce shock fade during prolonged use
- Premium grade 5WT shock oil for consistent suspension damping along a wide temperature range
- Nitrogen charged monotube design with piggyback reservoir
- 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
- PTFE lined spherical bearings and application specific mounting hardware
- 6061 aircraft grade aluminum CNC machined components
- One-piece, hard anodized, impact extruded aluminum cylinders offer excellent corrosion resistance and consistent finish
- 100% Rebuildable
- 100% Revalveable
Overview
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 ICON shock absorbers, 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 CDE Valve upgrade is included for those desiring an easy way to tune the ride electronically from inside the vehicle. Compression Damping Electronic Valve (CDEV) is an electronically controlled valve that meters the flow of oil to regulate the amount of damping force that is created by the shock when compressed. This infinitely variable valve can react in less than 40ms and has the ability to make extremely precise adjustments for varying terrain. CDEV’s hydraulic circuits are also custom tailored per application to create the highest resolution and dynamic range allowable for each specific vehicle. Powered by ICON Intelligent Control and proprietary ICON mobile app, the system uses information from the onboard G-force sensor and Gyroscope to perform calculations based on algorithms and user-defined settings to predict terrain and adjust shock settings via the CDEV accordingly.
Questions
Will this fit my truck?
Select your truck at the top of the page and the fit check will confirm it. If your exact trim is not listed, call 866-235-4715 or live chat and a fitment specialist will check it before you order.
Do you help with installation?
Yes. Our technical team helps you or your shop with installation and troubleshooting after delivery, on top of the manufacturer’s support.
What if the part has a problem?
We work the warranty claim with the manufacturer on your behalf, within the manufacturer’s warranty policy.
Can I return it?
Most items can be returned within 30 days. See our return policy for details.
No reviews for this part yet. Trucks R Us is rated on Trustpilot, Google and the BBB.
About ICON Vehicle Dynamics
ICON Vehicle Dynamics specializes in performance suspension components, shocks, and accessories for today’s most popular trucks & SUVs. Since 2008, ICON has been developing products that redefine the limits of what a “stock” vehicle is capable of. ICON is part... Shop all ICON Vehicle Dynamics