Rancho RS90000XL 4″ Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

Description
Rancho RS90000XL 4″ Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

Rancho RS9000XL 4″ Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

Part Number: RS999381

Summary: The Rancho RS9000XL series delivers industry-leading versatility for heavy-duty trucks requiring precise ride control. Featuring a 9-position manual adjustment knob, these shocks allow owners to instantly tune damping levels to compensate for varying payloads or towing requirements. Specifically configured for GMC Sierra HD models with a 4-inch rear lift, they provide the ideal balance between highway comfort and off-road stability.

Features

• 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping to ensure the driver can transition from a soft street ride to firm control for heavy towing.
• Large Shock Body: A 2.75-inch diameter reserve tube provides increased oil capacity to ensure cooler operating temperatures during heavy-duty use.
• Nitrogen Gas Charged: High-pressure gas optimization provides a barrier against oil foaming to ensure consistent damping performance under load.
• Heavy-Duty Piston: A 1.25-inch sintered iron piston provides structural integrity and smooth fluid flow to ensure rapid response to road irregularities.

Technical Specifications

Fitment

• 2011-2018 GMC Sierra 2500HD
• 2011-2018 GMC Sierra 3500HD
• Note: Designed for vehicles equipped with 4-inch rear lift height.

What’s Included

• Includes 2 Shocks (Pair)
• Protective Red Dust Boots
• Required Mounting Hardware

Why Choose This Product?

• Engineering Advantage: The RS9000XL is one of the most flexible shock platforms in the world, utilizing a tri-tube design that allows for massive fluid capacity and external adjustability without disassembly.
• Performance Benefit: Drivers gain total control over their vehicle’s firmness, effectively eliminating the “stiff” ride often associated with unloaded heavy-duty trucks while maintaining the ability to stiffen the suspension for maximum trailer stability.

Related Products

RS5000X (Front):
Rancho RS5000X 4" Front Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS5000X (Rear):
Rancho RS5000X 4" Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS7MT (Rear):
Rancho RS7MT 4" Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS7MT (Front):
Rancho RS7MT 4" Front Lift Shocks for 2011-2018 GMC Sierra 2500HD

Front Only (Same Series):
Rancho RS90000XL 4" Front Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS5000X (Kit):
Rancho RS5000X 4" Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS90000XL (Kit):
Rancho RS90000XL 4" Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS7MT (Kit):
Rancho RS7MT 4" Lift Shocks for 2011-2018 GMC Sierra 2500HD

Frequently Asked Questions

Will these shocks lift my GMC Sierra?
No, these shocks do not create lift. They are specifically lengthened to accommodate GMC 2500HD/3500HD models that already have a 4-inch rear lift kit installed.

How do I adjust the firmness of the shocks?
The RS9000XL features a 9-position knob located at the base of the shock body. You can manually turn the dial to increase or decrease damping resistance without any tools.

Does this include both rear shocks?
Yes, this SKU (2xRS999381_n605) includes a pair of two (2) shocks for the rear of your vehicle.