• King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2020-2025 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - King Shocks - King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2020-2025 GMC Sierra 3500HD
  • King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2020-2025 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - King Shocks - King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2020-2025 GMC Sierra 3500HD
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KIN25001-303A

King Shocks

King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2020-2025 GMC Sierra 3500HD

King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2020-2025 GMC Sierra 3500HD

$1,439.25 USD
$1,439.25 USD
Sale Sold out
Shipping calculated at checkout.

The King 2.5in Piggyback Reservoir Rear Shocks fit the 2020-2025 GMC Sierra 3500HD and deliver race-bred damping with on-the-fly compression adjustability.

Sold as a pair, custom-tuned for the Sierra HD platform.

Install Difficulty: Professional Install Only
Bolts to factory rear shock mounts with hand tools and typically installs in 60-90 minutes per side with a vehicle lift; professional alignment recommended after any suspension modification.

Product Overview

King's OEM Performance Series rear shocks use a 2.5in diameter body with a piggyback reservoir to dissipate heat and resist fade under heavy loads and washboard roads.

The external compression adjuster lets you dial in damping for hauling, towing, or high-speed desert work without removing the shock.

Each kit is custom-tuned through real-world testing to deliver the optimal damping curve for the Sierra 3500HD chassis.

Features & Specifications

  • Fits: 2020-2025 GMC Sierra 3500HD
  • 2.5in diameter shock body
  • Piggyback remote reservoir for heat dissipation
  • External compression adjuster
  • Custom-tuned damping curve for Sierra HD
  • Sold as a rear pair
  • Bolts to factory rear shock mounts
  • Race-proven OEM Performance Series build

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2020-2025 GMC Sierra 3500 HD AT4
2020-2021 GMC Sierra 3500 HD Base
2020-2025 GMC Sierra 3500 HD Denali
2024-2025 GMC Sierra 3500 HD Denali Ultimate
2022-2025 GMC Sierra 3500 HD Pro
2020-2025 GMC Sierra 3500 HD SLE
2020-2025 GMC Sierra 3500 HD SLT
âš  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