FOX 2.5 Performance Series HTO Front Shock — Chevrolet Silverado & GMC Sierra 2500/3500 HD SKU: 987-24-010

Overview

This is a FOX 2.5 Performance Series HTO (Hydraulic Top Out) bolt-on front shock for the 2020–2026 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 1.5"–2.5" front lift.

Before ordering: This is a front-position shock only — it does not include a rear shock. It covers the 2020–2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD, rated for a 1.5"–2.5" front 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 rear shock is needed for your build — it is not included with this SKU.

Verified Fitment

Chevrolet

GMC

All listed applications are Front 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 front shock, part number 987-24-010

Not included:

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

Critical Compatibility

• Front position only: This SKU is a front shock. It does not include or substitute for a rear shock.
• Lift height: Rated for a 1.5"–2.5" front 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.
• Mount types: Uses a bar pin top mount and a clevis bottom mount — confirm these match your vehicle's mounting hardware, as they differ from the eyelet-style mounts used on this SKU's matching rear shock (987-24-009) in this catalog.
• 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 987-24-010 2.5 Performance Series HTO front shock covers the 2020–2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD, uniformly rated for a 1.5"–2.5" front 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, and confirm the bar pin/clevis mount matches your vehicle's hardware.

This Product Is For You If

• You own a 2020–2026 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 front lift is within the 1.5"–2.5" 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 front shock specifically, not the rear.

This Product Is Not For You If

• You need a rear shock — this SKU is front position only. See FOX 987-24-009 for the matching rear shock.
• Your target front lift falls outside the 1.5"–2.5" range.
• You own a 2024+ Silverado or Sierra 2500 HD and have not confirmed your exact trim against the table.
• Your vehicle's mounting hardware does not match the bar pin (top) / clevis (bottom) mount configuration.

Product Family Reference

For the matching rear-position 2.5 Performance Series HTO shock covering this same Chevrolet Silverado/GMC Sierra 2500 HD/3500 HD range, see FOX 987-24-009.

Common Questions

Is this a front or rear shock?
Front only. It does not include or substitute for a rear shock. See FOX 987-24-009 for the matching rear 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?
1.5" to 2.5" front lift.

What mounts does this shock use?
A bar pin top mount and a clevis bottom mount.

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.