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Internal Reservoir Damping for Heavy Duty GM Trucks
The ICON 76551 is a Vehicle Specific front shock built for 2011 to 2026 GM 2500HD and 3500HD trucks that need consistent damping without the bulk of an external canister. Unlike remote reservoir designs, 76551 houses its nitrogen charge inside the shock body itself, keeping the front end clean while still delivering the cooling benefits of a larger oil volume. Owners running 0 to 3.5 inches of front lift get a direct, vehicle specific tune engineered by ICON for the added ride height without sacrificing on road manners or towing composure.
Key Features
- Internal nitrogen reservoir eliminates the need for external hoses or canister mounting
- Vehicle specific valving tuned for 0 to 3.5 inches of front lift on GM 2500HD/3500HD platforms
- Nitrogen charged monotube design for fade resistant, consistent damping
- 2 inch body diameter shock with 10.07 inches of travel
- Eyelet upper and lower mounts for direct bolt in installation
- 100 percent rebuildable and revalveable ICON shock architecture
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2011-2026 | Chevrolet | Silverado 2500HD | - |
| 2011-2026 | Chevrolet | Silverado 3500HD | - |
| 2011-2026 | GMC | Sierra 2500HD | - |
| 2011-2026 | GMC | Sierra 3500HD | - |
Specifications
| Detail | Value |
|---|---|
| MPN | 76551 |
| UPC | 840103428864 |
| Reservoir Type | Internal |
| Body Diameter | 2 in |
| Compressed Length | 16.1 in |
| Extended Length | 26.17 in |
| Travel | 10.07 in |
| Adjustable | No |
| Mount Type | Eyelet / Eyelet |
What's Included
- 1 ICON 76551 Front VS 2.0 HD Internal Reservoir Shock
- Mounting hardware
About ICON Vehicle Dynamics
ICON Vehicle Dynamics engineers suspension systems and shocks that are designed, tested, and built in the USA. Every ICON shock is developed with vehicle specific valving and is fully serviceable, giving truck and SUV owners a long term performance upgrade over stock components.
FAQ
What is the 76551?The 76551 is an ICON front internal reservoir shock built for 2011 to 2026 GM 2500HD and 3500HD trucks running 0 to 3.5 inches of front lift.
Does the 76551 require a remote reservoir mount?No. The 76551 uses an internal nitrogen reservoir housed inside the shock body, so there is no external canister to mount.
Is the 76551 sold as a single shock or a pair?The 76551 is sold individually. Most installations use two units for both front positions.
Can the 76551 be rebuilt or revalved?Yes. Like all ICON shocks, the 76551 is 100 percent rebuildable and revalveable by ICON.
What lift height is the 76551 designed for?The 76551 is vehicle specific tuned for 0 to 3.5 inches of front lift on GM 2500HD/3500HD trucks.
Will the 76551 affect factory ride quality?The 76551 is tuned to maintain a comfortable, controlled ride while adding lift capability and improved damping control.
Does the 76551 fit ZR2 or AT4X submodels?The 76551 is compatible with 0 to 2 inches of front lift on Silverado 2500 ZR2 and Sierra 2500 AT4X applications.
Is the 76551 gas charged?Yes, the 76551 uses a nitrogen charged monotube design for consistent, fade resistant performance.
Install Instructions
- Raise the front of the vehicle and support the frame rails with jack stands.
- Remove the factory front shock from the upper and lower mounts.
- Position the 76551 shock into the upper mount and install factory hardware.
- Align the lower eyelet with the mount and install factory hardware.
- Torque all hardware to factory specification.
- Repeat on the opposite side and lower the vehicle.
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