• King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2015-2019 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - King Shocks - King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2015-2019 GMC Sierra 3500HD
  • King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2015-2019 GMC Sierra 3500HD - Stateside Performance - Shocks and Struts - King Shocks - King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2015-2019 GMC Sierra 3500HD
1 2

KIN25001-303A

King Shocks

King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2015-2019 GMC Sierra 3500HD

King Shocks 2.5 Adjustable Piggyback Reservoir Rear Shocks - Pair | 2015-2019 GMC Sierra 3500HD

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

The King Shocks 2.5in Piggyback Reservoir Rear Shocks fit the 2015-2019 GMC Sierra 3500HD and deliver custom-tuned damping for serious on- and off-road performance.

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

Product Overview

This OEM Performance Series rear shock pair features a 2.5in diameter body with a piggyback remote reservoir for added oil capacity and consistent fade-free damping under load.

Each shock includes external compression adjusters, letting you dial in ride quality for hauling, towing, or rough terrain on your Sierra 3500HD.

King tunes the damping curve through real-world testing to match the truck's weight and suspension geometry.

Features & Specifications

  • Fits: 2015-2019 GMC Sierra 3500HD
  • 2.5in diameter shock body
  • Piggyback remote reservoir for added oil capacity
  • External compression adjusters for ride tuning
  • Custom-tuned damping curve for HD trucks
  • Sold as a pair for the rear axle
  • Bolts to factory rear shock mounts

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2015-2019 GMC Sierra 3500 HD Base
2015-2019 GMC Sierra 3500 HD Denali
2015-2019 GMC Sierra 3500 HD SLE
2015-2019 GMC Sierra 3500 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.

View full details

  • 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