Rancho RS90000XL 5-6″ Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

Description
Rancho RS90000XL 5-6″ Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

Rancho RS9000XL 5-6″ Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

Part Number: RS999055

Summary: The Rancho RS9000XL series provides the ultimate in damping flexibility for heavy-duty applications. Featuring a 9-position manual adjustment knob, these shocks allow owners to instantly tune ride quality between soft street comfort and firm control for towing or off-road use. Engineered for vehicles with 5-6 inches of suspension lift, this gas-pressurized system ensures consistent performance by reducing fluid aeration during aggressive cycles.

Features

• 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping force to ensure custom-tailored ride control for any load or terrain.
• Large Shock Body: The 2.75-inch diameter reserve tube provides increased oil capacity to ensure lower operating temperatures during heavy-duty use.
• Nitrogen Gas Charged: High-pressure gas optimization provides a reduction in fluid foaming and aeration to ensure consistent damping performance.
• Polyurethane Bushings: Heavy-duty polyurethane material provides enhanced durability and pivot response to ensure long-term service life in harsh environments.

Technical Specifications

Fitment

• 1999-2004 GMC Sierra 2500 4WD
• 2003-2009 Hummer H2
• Note: Designed for vehicles specifically equipped with 5″ to 6″ of aftermarket suspension lift.

What’s Included

• (2) RS999055 Front Shocks
• (2) RS999056 Rear Shocks
• Red Protective Dust Boots
• Required Mounting Hardware and Bushings

Why Choose This Product?

• Engineering Advantage: Rancho’s MyRide technology allows for a massive 400% change in damping force, giving you a wider range of control than standard fixed-valve shocks.
• Performance Benefit: Eliminate the “float” associated with lifted heavy-duty trucks while maintaining the ability to soften the ride for daily commuting.

Related Products

RS7MT (Front):
Rancho RS7MT 5-6" Front Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

RS90000XL (Rear):
Rancho RS90000XL 5-6" Rear Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

RS7MT (Rear):
Rancho RS7MT 5-6" Rear Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

RS90000XL (Front):
Rancho RS90000XL 5-6" Front Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

RS7MT (Kit):
Rancho RS7MT 5-6" Lift Shocks for 1999-2004 GMC Sierra 2500 4WD

Frequently Asked Questions

How do I adjust the stiffness of these shocks?
The RS9000XL features a manual knob located at the base of the shock; simply turn the dial to setting 1 for the softest ride or setting 9 for maximum firmness.

Do these shocks provide the 6 inches of lift?
No, these shocks do not create lift. They are specifically valved and length-indexed to function correctly on vehicles already equipped with a 5-6 inch lift kit.

Are the protective boots included?
Yes, this set includes Rancho’s signature red protective boots to shield the piston rod from debris and corrosion.