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

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

Rancho RS9000XL 4″ Lift Shocks for 2011-2018 GMC Sierra 2500HD / 3500HD

Part Number: RS999380 / RS999381

Summary: The Rancho RS9000XL series provides the ultimate in suspension versatility for heavy-duty GMC trucks. Featuring a 9-position manual adjustment knob, these shocks allow owners to instantly tune damping levels to compensate for varying payloads or terrain. Whether you are daily driving an empty bed or towing a heavy gooseneck, this system provides the specific compression and rebound control needed to maintain stability and comfort in a 4-inch lifted configuration.

Features

• 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping to ensure the perfect ride quality for towing, hauling, or off-road use.
• Large Shock Body: A massive 2.75-inch diameter reserve tube provides increased oil capacity to ensure cooler operation and consistent performance under heavy loads.
• Nitrogen Gas Charged: High-pressure gas optimization provides a reduction in aeration and foaming to ensure immediate response during rapid suspension cycling.
• Protective Boot: A heavy-duty liquid metallic finish and included bellows boot provide a barrier against debris and corrosion to ensure long-term seal integrity.

Technical Specifications

Fitment

• 2011-2018 GMC Sierra 2500HD
• 2011-2018 GMC Sierra 3500HD
• Note: Designed specifically for vehicles equipped with a 4-inch suspension lift kit.

What’s Included

• (2) Rancho RS9000XL Front Shocks
• (2) Rancho RS9000XL Rear Shocks
• Protective Bellows Boots
• Required Mounting Bushings and Washers

Why Choose This Product?

• Engineering Advantage: Rancho’s MyRide technology allows for a 400% change in damping force between setting 1 and 9, offering more range than standard monotube shocks.
• Performance Benefit: Eliminates the “one size fits all” compromise of factory shocks, giving the driver total control over vehicle pitch and roll during towing.

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

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

RS90000XL (Front):
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

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

Frequently Asked Questions

How do I adjust the shocks?
The shocks feature an external 9-position knob located at the base of the shock body that can be turned by hand to increase or decrease firmness.

Will these shocks lift my GMC Sierra?
No, these shocks do not create lift. They are specifically valved and length-corrected to work with a truck that already has a 4-inch lift kit installed.

What setting should I use for towing?
For heavy towing or hauling, it is recommended to use higher settings (7-9) on the rear shocks to increase stability and reduce sway.