FOX 2.0 Performance Series Rear Shock GM 2500/3500 HD Trucks & SUV's 3.5"-6.5″ Lift
FOX 2.0 Performance Series Reservoir Rear Shock
For 1999–2019 GM 2500/3500 Trucks & SUVs with 3.5"–6.5" Rear Lift
Upgrade your suspension with the FOX 2.0 Performance Series Reservoir Shock. Designed for lifted heavy-duty trucks and SUVs, this shock delivers improved ride quality, better heat control, and consistent damping performance both on and off the road.
The aluminum-bodied Performance Series 2.0 Reservoir smooth body shock delivers FOX’s industry-leading, race-dominating performance in an affordable, hassle-free bolt-on package. Its heat-reducing design features a metal-impacted clear anodized aluminum shock body that dissipates heat faster than conventional steel-body shocks, helping maintain consistent damping performance during demanding driving conditions.
The external reservoir increases oil and nitrogen capacity while delivering a striking race-inspired appearance. A black anodized reservoir mounting clamp and additional components are CNC-machined from 6061-T6 aluminum for durability and strength. Combined with FOX’s race-developed high-flow damping piston and application-specific valving, the Performance Series 2.0 Reservoir shock provides predictable ride quality capable of handling rough road conditions with confidence.
Key Features
- Includes aluminum billet reservoir clamp
- Performance tuned for vehicle-specific applications
- Aluminum shock body dissipates heat faster than steel shocks
- External reservoir system improves cooling and oil capacity
- Black anodized CNC-machined aluminum components
Specifications
Series: Performance Series
Rear Lift Height: 3.5"–6.5"
Travel: 12.12"
Extended Length: 29.52"
Compressed Length: 17.4"
Shock Body: 2.0" impact extruded 6061-T6 aluminum
Body Finish: Clear anodized for corrosion resistance
Components: Black anodized CNC-machined 6061-T6 billet aluminum
Shaft: 5/8" hard chrome plated heat-treated alloy steel
Piston: Race-developed high-flow piston design
Valving: Application-specific valving to maximize performance
Seals: Redundant sealing pack system including main seal, wiper seal, and scraper seal
Top Mount: Eyelet
Bottom Mount: Eyelet
Fitment
Fits rear applications with 3.5"–6.5" suspension lift on the following vehicles:
Chevrolet
- 2002–2006 Avalanche 2500
- 2001–2007 Silverado 1500 HD
- 1999–2004 Silverado 2500
- 2001–2019 Silverado 2500HD
- 2001–2019 Silverado 3500 / 3500HD
- 2000–2013 Suburban 2500
GMC
- 2001–2007 Sierra 1500 HD
- 1999–2004 Sierra 2500
- 2001–2019 Sierra 2500HD
- 2001–2019 Sierra 3500 / 3500HD
- 2000–2013 Yukon XL 2500
Hummer
-
2003–2009 Hummer H2 (4WD)
Fitment Notes
- Rear shock application
- Designed for vehicles with 3.5"–6.5" rear lift
- Includes billet reservoir clamp
Built Right. Backed Right.
Our crew’s on call Monday–Friday, 9–5 EST. Hit us up at 865-983-5004 — real support, done right.
Why Fox Shocks
Fox shocks are well-regarded in the off-road and performance world because they combine durability, advanced damping technology, and customization options that suit a wide range of vehicles and driving styles. For 4WD trucks, the “best” Fox shocks depend on how you actually use the truck — daily driving, towing, trail riding, or hardcore off-road.
Fox Shocks FAQ's
Should I Get 2.0 or 2.5 Shocks
Choose Fox 2.0 if:
You prioritize a smoother daily ride.
You stick to moderate trails and lighter off-road use.
Budget-friendly performance is key.
Choose Fox 2.5 if:
You demand more from your suspension—like aggressive off-roading, towing, or extended high-speed use.
You need better heat management and durability.
You don’t mind paying a bit more for enhanced performance and longevity.
Why Monotube Shocks Excel on Lifted Trucks
Handles Added Unsprung Weight – Larger wheels/tires from a lift add rotational mass and stress to your suspension. Monotube designs have better damping control to keep those tires planted.
Better Heat Dissipation – The single-tube design allows oil and gas to cool more efficiently, preventing fade during towing, off-roading, or long highway runs.
More Precise Handling – They respond faster to suspension movement, which is critical when correcting for body roll in a taller truck.
Will Better Shocks Improve Ride Quality
Tightening Up a Floaty Vehicle
If your truck feels like it’s “floating” or wandering at highway speeds, new shocks will firm up the suspension, improve steering response, and keep the body from rolling excessively in turns.
This doesn’t necessarily make the ride softer — it makes it more controlled.
Reducing Harsh Bouncing & Jarring
If you’re feeling hard bounce after hitting a bump (especially front or rear “pogo stick” motion), your shocks likely have lost rebound damping.
New shocks restore that damping, keeping your tires on the ground and absorbing energy before it reaches you.
Why Measure Shocks and Lift Height
1. Improved Ride Comfort
Matching the right shocks to your truck’s lift height enhances ride comfort. Ill-fitting shocks can cause a harsh, bumpy ride and limit suspension travel.
2. Better Handling & Control
Shocks sized for your lift height improve steering stability, cornering, and overall control — especially on rough terrain or with larger tires.
3. Increased Safety
The right shocks keep your tires in consistent contact with the ground, reducing the risk of skids, loss of control, or suspension component damage.
4. Greater Durability
When shocks operate within their intended range, they last longer and protect other suspension parts from premature wear.
5. Optimal Performance
A well-matched suspension setup ensures your truck performs at its best, whether you’re off-roading, towing, hauling, or commuting daily.