Fox 2.0 Performance Front Shock | Single | 0-2 in Lift | 2001-2010 GM HD & Hummer H2

Fox 2.0 Performance Series Front Shock | Single Unit | 0–2" Front Lift | 2001–2010 GM 2500HD / 3500HD & 2003–2009 Hummer H2

The Fox 2.0 Performance Series front shock (SKU: AX663) is engineered for 2001–2010 Chevrolet Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD, and 2003–2009 Hummer H2 running stock height or up to 2" of front lift. Aluminum body construction improves heat dissipation over steel-bodied OEM shocks. The IFP (Internal Floating Piston) design separates oil and nitrogen gas to maintain consistent damping performance through heat cycles during towing, hauling, and rough-road use. Tuned specifically for the GMT800 and GMT900 GM HD front suspension platform — not a universal shock. Sold as a single front shock.

Verified Fitment (OFAS Standard)

• Chevy Silverado 2500HD (Front): 2001–2010 — stock height to 2" front lift
• Chevy Silverado 3500HD (Front): 2001–2010 — stock height to 2" front lift
• GMC Sierra 2500HD (Front): 2001–2010 — stock height to 2" front lift
• GMC Sierra 3500HD (Front): 2001–2010 — stock height to 2" front lift
• Hummer H2 (Front): 2003–2009 — stock height to 2" front lift
• Chevy Suburban 2500 (8-lug, Front): 2001–2010 — verify shock mounting geometry before ordering
• GMC Yukon XL 2500 (8-lug, Front): 2001–2010 — verify shock mounting geometry before ordering

Does NOT fit: 2011–2026 Silverado/Sierra 2500HD/3500HD (different front suspension geometry — use AX189 instead). Does not fit Silverado/Sierra 1500 or Tahoe/Yukon (6-lug, different geometry). Does not fit trucks with more than 2" of front lift — a longer-travel shock is required. Not compatible with long-travel or coilover conversion systems.

Technical Specifications

• SKU: AX663
• Series: Fox 2.0 Performance Series
• Position: Front
• Quantity: Single shock (order 2 for a complete front pair)
• Body: Aluminum — improved heat dissipation vs. OEM steel body
• Damping: IFP (Internal Floating Piston) — oil/nitrogen gas separation for consistent damping
• Lift Range: 0–2" front lift
• Platform: GMT800 (2001–2007) and GMT900 (2007–2010) GM HD front suspension
• Weight: 7 lbs
• Application: Towing, hauling, daily driving, rough-road use

Installation Notes

• Sold as single: This listing is for one (1) front shock. Order quantity 2 for a complete front replacement pair.
• Lift confirmation required: Verify front lift height is 0–2" before ordering. Installing on a truck with more than 2" of front lift will result in incorrect shock travel and potential bottoming or topping out.
• Generation confirmation: This shock fits 2001–2010 GM HD only. For 2011–2026 Silverado/Sierra 2500HD/3500HD, order AX189 instead — the front suspension geometry changed significantly in 2011.
• Torque specs: Upper and lower mounting hardware — torque to OEM specification for GMT800/GMT900 front shock mounts (verify in Fox install sheet or GM service manual).
• Alignment recommended: A front-end alignment check is recommended after front shock replacement, particularly if the truck has been running worn shocks.
• Pairing note: For optimal handling balance, replace front shocks in pairs. Mismatched damping rates between left and right will cause instability under braking and cornering.

Installation Warning

Do not install on 2011 or newer GM HD trucks — front suspension geometry is incompatible. Use AX189 for 2011–2026 applications. Do not install on trucks with more than 2" of front lift — incorrect shock travel will result in bottoming or topping out. Sold as a single unit — verify quantity before ordering. Once installed, the unit is non-returnable.

What is your model year, front lift height, and are you replacing one shock or ordering a complete front pair — confirm 2001–2010 GMT800/GMT900 platform (not 2011+ K2XX/T1XX) before ordering?