Rancho RS90000XL 4″ Rear Lift Shocks for 1988-2000 GMC K3500 4WD

Description
Rancho RS90000XL 4″ Rear Lift Shocks for 1988-2000 GMC K3500 4WD

Rancho RS90000XL 4″ Rear Lift Shocks for 1988-2000 GMC K3500 4WD

Part Number: RS999227

Summary: The Rancho RS90000XL series provides industry-leading versatility for the GMC K3500, featuring a 9-position manual tuning knob that allows drivers to adjust damping levels on the fly. Designed for vehicles with a 4-inch rear lift, these shocks solve the compromise between empty-bed comfort and heavy-duty towing stability. By allowing you to switch from a soft street ride to a firm off-road or hauling setting, these shocks ensure your heavy-duty truck remains composed under any load condition.

Features

• 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping to ensure the perfect ride quality for towing, hauling, or daily driving.
• Large Shock Body: A 2.75-inch diameter reserve tube provides increased fluid capacity to ensure cooler operation and consistent performance during heavy-duty use.
• Nitrogen Gas Charged: High-pressure gas displacement provides immediate response to road imperfections to ensure minimized aeration and foaming.
• Protective Boot: A heavy-duty red polyvinyl accordion boot provides a physical barrier for the piston rod to ensure longevity against debris and corrosion.

Technical Specifications

Fitment

• 1988-2000 GMC K3500 4WD
• 1992-1999 GMC Yukon
• Note: Fitment confirmed for vehicles equipped with Rancho Suspension systems. Configured for 4-inch rear lift.

What’s Included

• Includes 2 Shocks
• Protective Red Dust Boots
• Mounting Hardware (where applicable)

Why Choose This Product?

• Engineering Advantage: Unlike standard fixed-rate shocks, the RS9000XL uses a patented adjustable valving system that modifies the bypass flow for true user-defined performance.
• Performance Benefit: Drivers gain total control over their suspension feel, eliminating the “stiff” ride typically associated with heavy-duty lift kits when the truck is unloaded.

Related Products

RS5000X (Front):
Rancho RS5000X 4" Front Lift Shocks for 1988-2000 GMC K3500 4WD

RS5000X (Rear):
Rancho RS5000X 4" Rear Lift Shocks for 1988-2000 GMC K3500 4WD

Front Only (Same Series):
Rancho RS90000XL 4" Front Lift Shocks for 1988-2000 GMC K3500 4WD

RS5000X (Kit):
Rancho RS5000X 4" Lift Shocks for 1988-2000 GMC K3500 4WD

RS90000XL (Kit):
Rancho RS90000XL 4" Lift Shocks for 1988-2000 GMC K3500 4WD

Frequently Asked Questions

How do I adjust these shocks?
The RS9000XL features an easy-to-turn 9-position knob located at the base of the shock body, allowing for manual tuning without tools.

Will these shocks lift my GMC K3500?
No, these shocks do not create lift. They are specifically configured for vehicles that already have a 4-inch rear lift kit installed.

What is the benefit of the large 2.75-inch body?
The oversized body allows for more oil capacity, which helps dissipate heat faster than standard shocks, preventing “shock fade” during heavy towing.