FOX Performance Series 2.0 Reservoir Rear Shock

1999–2019 GM 2500HD / 3500HD Trucks & 2500 SUVs | 0–1″ Lift

The FOX Performance Series 2.0 Reservoir Smooth Body Shock delivers FOX’s industry-leading, race-proven performance in an affordable, hassle-free bolt-on package. Built with a metal-impact clear anodized 6061-T6 aluminum shock body, this design dissipates heat faster than traditional steel body shocks, helping maintain consistent damping performance even under demanding conditions.

An external reservoir increases oil and nitrogen capacity, reducing shock fade while also giving the shock its signature race-inspired appearance. The reservoir mounts using a black anodized CNC-machined 6061-T6 billet aluminum clamp and hardware for strength and durability.

Inside the shock, a race-developed high-flow damping piston paired with application-specific valving delivers predictable ride quality and improved control. The result is a shock that performs confidently on rough roads, heavy-duty work trucks, and off-road terrain.

Key Features

• 2.0″ Impact-Extruded Aluminum Shock Body – Lightweight 6061-T6 aluminum body dissipates heat quickly and resists corrosion.
• External Reservoir Design – Increases oil and nitrogen capacity to reduce heat buildup and damping fade.
• Race-Developed High-Flow Piston – Improves damping control and responsiveness over rough terrain.
• Application-Specific Valving – Tuned for predictable ride quality and improved stability.
• Hard Chrome Plated Shock Shaft – 5/8″ heat-treated alloy steel shaft provides strength and durability.
• CNC-Machined Aluminum Components – Black anodized billet aluminum hardware adds durability and corrosion resistance.
• Bolt-On Installation – Direct replacement design for easy installation.

Specifications

• Series: Performance Series
• Travel: 10.62″
• Shock Body: 2.0″ impact-extruded 6061-T6 aluminum (rust resistant)
• Body Finish: Clear anodized
• 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
• Extended Length: 26.52″
• Compressed Length: 15.9″
• Top Mount: Eyelet
• Bottom Mount: Eyelet
• Shock Type: Monotube gas charged
• Reservoir: External aluminum reservoir

• Includes billet reservoir mounting clamp

Fitment

Designed for rear suspension applications with 0–1″ of lift (some SUV applications support up to 0–3″).

Chevrolet

• 1999–2019 Chevrolet Silverado 2500 / 2500HD
• 2001–2019 Chevrolet Silverado 3500 / 3500HD
• 2002–2006 Chevrolet Avalanche 2500
• 2000–2013 Chevrolet Suburban 2500

GMC

• 1999–2019 GMC Sierra 2500 / 2500HD
• 2001–2019 GMC Sierra 3500 / 3500HD
• 2000–2013 GMC Yukon XL 2500

Hummer

• 2003–2009 Hummer H2 (4WD)

Lift Compatibility

• Most applications: 0–1″ rear lift
• Avalanche 2500 and Suburban 2500: 0–3″ rear lift

Installation

• Installation Time: ~1 hour
• Difficulty: Easy
• Installation Type: Direct bolt-on replacement
• Hardware: Factory mounting hardware reused

What’s Included

• (1) FOX Performance Series 2.0 Reservoir Rear Shock
• Billet aluminum reservoir mounting clamp