Rancho RS5000X 4″ Rear Lift Shocks for 2011-2018 GMC Sierra 3500HD

Description
Rancho RS5000X 4″ Rear Lift Shocks for 2011-2018 GMC Sierra 3500HD

Rancho RS5000X 4″ Rear Lift Shocks for 2011-2018 GMC Sierra 3500HD

Part Number: RS55381

Summary: The Rancho RS5000X series is engineered to provide a significant upgrade in ride quality and durability for your heavy-duty truck. Utilizing a sophisticated twin-tube design and Progressive Engagement Valving, these shocks are configured for GMC Sierra 3500HD models with a 4-inch rear lift. By managing high-velocity damping more effectively, they provide smooth street comfort while maintaining the ruggedness required for towing and off-road work.

Features

• Progressive Engagement Valving: A custom-tuned internal shim stack provides a gradual transition of fluid to ensure reduced body roll and improved stability during sudden maneuvers.
• Gas Pressurization: High-pressure nitrogen gas charge provides a consistent force against the hydraulic fluid to ensure reduced aeration and shock fade.
• Heavy-Duty Twin-Tube Body: A 2.25-inch reserve tube provides increased oil capacity to ensure cooler operating temperatures and protection against stone bruising.
• Nitro-Carburized Piston Rod: A 16mm hardened steel rod provides a smooth, durable surface to ensure long-term seal integrity and corrosion resistance.

Technical Specifications

Fitment

• 2011-2018 GMC Sierra 3500HD
• Note: Configured for vehicles with 4″ of rear lift height.

What’s Included

• Includes 2 Shocks
• Protective Dust Boots (Red)
• Necessary Mounting Bushings

Why Choose This Product?

• Engineering Advantage: Rancho’s patented valving system allows the shock to react instantly to road impacts, providing a “best of both worlds” feel for daily driving and heavy hauling.
• Performance Benefit: The increased fluid capacity and nitrogen charging result in a more predictable ride, even when the vehicle is loaded to its GVWR.

Related Products

Front Only (Same Series):
Rancho RS5000X 4" Front Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS90000XL (Rear):
Rancho RS90000XL 4" Rear Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS7MT (Front):
Rancho RS7MT 4" Front Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS7MT (Rear):
Rancho RS7MT 4" Rear Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS90000XL (Front):
Rancho RS90000XL 4" Front Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS90000XL (Kit):
Rancho RS90000XL 4" Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS7MT (Kit):
Rancho RS7MT 4" Lift Shocks for 2011-2018 GMC Sierra 3500HD

RS5000X (Kit):
Rancho RS5000X 4" Lift Shocks for 2011-2018 GMC Sierra 3500HD

Frequently Asked Questions

Will these shocks lift my GMC Sierra 3500HD?
No, these shocks do not create lift. They are specifically lengthened and valved to work with a vehicle that already has a 4-inch rear lift kit installed.

What is the benefit of the twin-tube design for a 3500HD?
The twin-tube design is highly durable; the outer “reserve” tube can take a dent from road debris without affecting the inner pressure tube, ensuring your suspension keeps working in harsh environments.

Are these shocks sold as a pair?
Yes, this SKU (2xRS55381) includes two (2) rear shocks to complete the installation for the rear axle.