Rancho RS90000XL 4″ Lift Shocks for 2001-2010 GMC Sierra 2500HD

Description
Rancho RS90000XL 4″ Lift Shocks for 2001-2010 GMC Sierra 2500HD

Rancho RS9000XL 4″ Lift Shocks for 2001-2010 GMC Sierra 2500HD

Part Number: RS999289

Summary: The Rancho RS9000XL series delivers industry-leading versatility for heavy-duty applications through its globally recognized adjustable damping technology. Featuring a 9-position manual tuning knob, these shocks allow drivers to instantly transition from a soft street ride to a firm setting optimized for heavy towing or aggressive off-road use. Engineered for vehicles with a 4-inch lift, this set provides the necessary travel and control to maintain stability and comfort in any driving environment.

Features

• 9-Position Tuning Knob: A manual adjustment dial provides 400% change in damping force to ensure precise control for varying load weights and terrain types.
• Nitrogen Gas Pressurized: High-pressure gas charging provides a reduction in aeration and foaming to ensure consistent performance during high-duty cycles.
• Large Shock Body: An increased fluid capacity design provides superior heat dissipation to ensure fade-free operation under heavy towing conditions.
• Protective Boot: A heavy-duty liquid metallic finish and included boot provide debris protection to ensure long-term seal integrity and piston rod durability.

Technical Specifications

Fitment

• 2001-2010 GMC Sierra 2500HD
• 2003-2009 Hummer H2
• Note: For use with Rancho Suspension systems.

What’s Included

• (2) RS999289 Front Shocks
• (2) RS994297 Rear Shocks
• Protective Red Dust Boots

Why Choose This Product?

• Engineering Advantage: Rancho’s MyRide technology allows for the widest range of damping adjustment in the aftermarket, moving beyond “one size fits all” valving.
• Performance Benefit: Eliminates the compromise between daily driving comfort and the stiffness required for hauling heavy trailers or navigating trails.

Related Products

RS5000X (Rear):
Rancho RS5000X 4" Rear Lift Shocks for 2001-2010 GMC Sierra 2500HD

RS5000X (Front):
Rancho RS5000X 4" Front Lift Shocks for 2001-2010 GMC Sierra 2500HD

RS90000XL (Rear):
Rancho RS90000XL 4" Rear Lift Shocks for 2001-2010 GMC Sierra 2500HD

RS90000XL (Front):
Rancho RS90000XL 4" Front Lift Shocks for 2001-2010 GMC Sierra 2500HD

RS5000X (Kit):
Rancho RS5000X 4" Lift Shocks for 2001-2010 GMC Sierra 2500HD

Frequently Asked Questions

How do I adjust the firmness of these shocks?
These shocks feature a manual 9-position knob located at the base of the shock body; simply turn the dial to your preferred setting (1 for softest, 9 for firmest).

Will these shocks work with my stock-height GMC Sierra?
No, these specific part numbers are configured for vehicles equipped with a 4-inch lift kit to ensure proper suspension travel and avoid bottoming out.

Are these shocks sold as a complete set?
Yes, this specific SKU includes a full set of four shocks (two front and two rear) for a complete vehicle upgrade.

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