FOX 2.5 Performance Series HTO Rear Shock — Chevrolet Silverado & GMC Sierra 2500/3500 HD SKU: 987-24-009

Overview

This is a FOX 2.5 Performance Series HTO (Hydraulic Top Out) bolt-on rear shock for the 2011–2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD — a 2.5" internal floating piston (IFP) design with position-sensitive rebound damping, vehicle-specific valving, and a Type II clear-anodized aluminum body, rated for a 0"–1" lift.

Before ordering: This is a rear-position shock only — it does not include a front shock. It covers the 2011–2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD, rated for a 0"–1" lift. Coverage on the Silverado 2500 HD and Sierra 2500 HD narrows to specific trims starting in 2024 — confirm your exact trim if your truck is a 2024 or newer 2500 HD.

Required separately: Manufacturer-specified installation hardware, tools, and a professional installation are recommended; this listing does not include installation instructions or hardware beyond the shock itself. Confirm whether a matching front shock is needed for your build — it is not included with this SKU.

Verified Fitment

Chevrolet

GMC

All listed applications are Rear position, All drivetrain, All fuel type, All body/door configurations.

Component Specifications

What Is and Is NOT Included

Included:

• One FOX 2.5 Performance Series HTO rear shock, part number 987-24-009

Not included:

• Front shock (not part of this SKU; confirm separately if needed for your build)
• Installation hardware and tools
• Professional installation or alignment services

Critical Compatibility

• Rear position only: This SKU is a rear shock. It does not include or substitute for a front shock.
• Lift height: Rated for a 0"–1" lift across all verified applications.
• Bolt-on installation: Described by the manufacturer as a bolt-on shock; confirm this matches your intended installation approach.
• Trim-specific coverage from 2024: The Silverado 2500 HD and Sierra 2500 HD are verified as "All" trims through 2023, then split into named trims (Custom, High Country, LT, LTZ, WT for Chevrolet; AT4, Denali, Denali Ultimate, Pro, SLE, SLT for GMC) starting in 2024. The Silverado 3500 HD and Sierra 3500 HD remain "All" trim across the full range.
• HTO benefit: Hydraulic Top Out technology is described as particularly beneficial after installing heavier, more aggressive tires, or on applications lifted higher than OEM specification.
• Multi-make coverage: Verified across Chevrolet and GMC HD applications. Confirm your specific make/model/year/trim combination against the table.

Installation Notes

No manufacturer installation instructions were supplied for this task. Professional installation is recommended for suspension components. Follow current FOX installation documentation for this exact part number, including torque specifications and any required hardware, before installation.

The Obsidian Take

This FOX 987-24-009 2.5 Performance Series HTO rear shock covers the 2011–2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD, uniformly rated for a 0"–1" lift. The Hydraulic Top Out piston adds position-sensitive rebound control that's particularly useful for heavier tires or lifted applications. Coverage is straightforward across most of the range, but 2024-and-newer 2500 HD trucks are split by named trim rather than covered as "All" — confirm your exact trim if you're on a current-generation 2500 HD.

This Product Is For You If

• You own a 2011–2026 Chevrolet Silverado 2500 HD/3500 HD or GMC Sierra 2500 HD/3500 HD whose exact trim (if 2024+) appears in the Verified Fitment table.
• Your target lift is within the 0"–1" range.
• You are running heavier or more aggressive tires, or a lift near or above OEM specification, and want the HTO rebound benefit.
• You are replacing or upgrading the rear shock specifically, not the front.

This Product Is Not For You If

• You need a front shock — this SKU is rear position only.
• Your target lift exceeds 1".
• You own a 2024+ Silverado or Sierra 2500 HD and have not confirmed your exact trim against the table.

Common Questions

Is this a front or rear shock?
Rear only. It does not include or substitute for a front shock.

What does HTO mean and why does it matter?
Hydraulic Top Out. It provides position-sensitive rebound damping that reduces harsh top-outs and improves comfort, particularly after installing heavier, more aggressive tires or on lifted applications.

Does this fit both Chevrolet and GMC trucks?
Yes — verified for the Silverado 2500 HD/3500 HD and Sierra 2500 HD/3500 HD across the listed years and trims.

What lift height is this shock rated for?
0" to 1".

What is the warranty?
FOX provides a Limited Lifetime Warranty on 2.0/2.5 Performance Series shocks purchased after 3/30/2025 (excluding sports car shocks and 2.0 Performance Series remote-reservoir shocks). See full warranty terms below.

Manufacturer Data Disclaimer

Fitment and specification data for this product are sourced from FOX Factory manufacturer fitment data and product documentation supplied for this exact part number, current as of publication. Specifications and fitment are subject to change without notice; confirm current documentation for this SKU at the time of purchase.

Required Legal, Warning, Fitment, and Return Notices

Warranty Summary: FOX Factory, Inc. warrants, to the original retail owner of each new FOX 2.0/2.5 Performance Series suspension product purchased after 3/30/2025 (excluding sports car shocks and 2.0 Performance Series remote-reservoir shocks), that the product is free from defects in materials and workmanship under normal use on the vehicle application it was designed for. This warranty covers factory defects in material and workmanship other than finish and coatings. For products not meeting the post-3/30/2025 purchase condition, FOX's standard Limited One (1) Year Warranty on suspension products applies instead, running from the date of original retail purchase from an authorized FOX dealer.

This warranty is conditioned on normal operation and proper maintenance as specified by FOX; is non-transferable and applies only to the original retail owner; and is void if the product is subjected to abuse, neglect, unauthorized repair or service, alteration, modification, accident, or other abnormal or improper use. FOX is not liable for removal, installation, or reinstallation costs, including labor. If FOX determines a product is covered, it will be repaired or replaced with a comparable model at FOX's sole discretion — this is the exclusive remedy, and incidental, consequential, or punitive damages are excluded. Normal wear and tear, and failures from abuse, improper assembly, neglect, alteration, improper maintenance, crash, misuse, or collision are not covered. This warranty gives specific legal rights, which may vary by state or country.