• Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - FOX - Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD
  • Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - FOX - Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD
  • Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - FOX - Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD
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FOX987-24-035

FOX

Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD

Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2011-2014 GMC Sierra 3500HD

$346.95 USD
$346.95 USD
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In stock

The Fox 2.5 Performance Series Smooth Body IFP Rear Shock fits the 2011-2014 GMC Sierra 3500HD and delivers extended drop-out travel with fade-resistant damping for lifted trucks.

Install Difficulty: Professional Install Only
Bolts to factory rear shock mounts with hand tools; typically installs in 45-60 minutes per side. Professional alignment recommended after any suspension modification.

Product Overview

This 2.5in aluminum-body monotube rear shock uses a race-developed main piston and a true Internal Floating Piston (IFP) to separate gas and oil, preventing cavitation under sustained abuse.

Application-specific valving delivers on-road comfort with less body sway, while extended travel supports 4-6in of rear lift on your Sierra 3500HD.

The aluminum body dissipates heat four times better than steel and the shock is fully serviceable for a long service life.

Features & Specifications

  • Fits: 2011-2014 GMC Sierra 3500HD
  • Provides 4-6" of rear lift
  • Accommodates 4-6in of rear lift
  • Hydraulic Top Out (HTO) reduces harsh top-out for a smoother ride, especially on lifted trucks or aggressive tires
  • 2.5in aluminum monotube body dissipates heat 4x better than steel
  • True Internal Floating Piston (IFP) separates gas and oil
  • Race-developed main piston with application-specific valving
  • Extended drop-out travel for improved off-road articulation
  • Fully serviceable and corrosion-resistant

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2011-2014 GMC Sierra 3500 HD Denali
2011-2014 GMC Sierra 3500 HD SLE
2011-2014 GMC Sierra 3500 HD SLT
2011-2014 GMC Sierra 3500 HD WT
⚠ Submodel Fitment: If your submodel is not listed in the fitment table above, we cannot confirm fitment. Please contact us before purchasing to verify.

Shipping & Returns

Tracking is typically provided within 3–5 business days; items shipping direct from the manufacturer may take 5–7. Some items are made to order or may be backordered. Questions about stock? Reach us through live chat or email.

Warranty

All warranties are through the manufacturer and are facilitated by Stateside Performance. Some manufacturers require the end user to contact them directly; in that case we will point you to the right contact. Email us with any warranty questions.

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  • Free shipping over $250

    Free shipping applies to items that are shipped via ground through UPS or FedEx and are over $250 going to the continental 48 states. This does not apply to Alaska or Hawaii, and does not apply to any item(s) that are shipped via freight or with any other option other than ground shipping.

    Shipping policy 

  • 30-day returns

    Returns must be requested within 30 days of delivery. Parts must be new, unused, uninstalled, and in original packaging, with an RMA. Some items are final sale.

    Return policy