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SKU:FOX987-24-035

FOX

Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2020-2026 GMC Sierra 2500HD

Fox Performance Series 2.5 Smooth Body IFP Rear Shock - 4-6 in Lift | 2020-2026 GMC Sierra 2500HD

Regular price $346.95 USD
Regular price Sale price $346.95 USD
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The Fox 2.5 Performance Series Smooth Body IFP Rear Shock fits the 2020-2026 GMC Sierra 2500HD and delivers extended drop-out travel with race-proven 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 is a 2.5-inch diameter monotube rear shock with an aluminum body and a true Internal Floating Piston (IFP) that separates gas and oil for fade-resistant damping.

Fox tunes the valving specifically for the Sierra 2500HD to reduce body sway on-road while extending drop-out travel off-road.

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

Features & Specifications

  • Fits: 2020-2026 GMC Sierra 2500HD
  • 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 diameter smooth aluminum body
  • Internal Floating Piston (IFP) separates gas and oil
  • Race-developed main piston with application-specific valving
  • Aluminum dissipates heat 4x better than steel
  • Fully serviceable and rebuildable
  • Sold individually -- order 2 for a pair

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2020-2026 GMC Sierra 2500 HD AT4
2024-2026 GMC Sierra 2500 HD AT4X
2020-2021 GMC Sierra 2500 HD Base
2020-2026 GMC Sierra 2500 HD Denali
2024-2026 GMC Sierra 2500 HD Denali Ultimate
2022-2026 GMC Sierra 2500 HD Pro
2020-2026 GMC Sierra 2500 HD SLE
2020-2026 GMC Sierra 2500 HD SLT
⚠ 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