Rancho RS5000X 2.5-4″ Rear Lift Shocks for 1969-1986 GMC K2500 4WD

Description
Rancho RS5000X 2.5-4″ Rear Lift Shocks for 1969-1986 GMC K2500 4WD

Rancho RS5000X 2.5-4″ Rear Lift Shocks for 1969-1986 GMC K2500 4WD

Part Number: RS55112

Summary: The Rancho RS5000X series leverages advanced CrossTune technology to provide a versatile ride for both on-road comfort and off-road durability. Engineered for vehicles with 2.5 to 4 inches of rear lift, these twin-tube gas-pressurized shocks utilize a unique valving system that minimizes foaming and aeration. The result is a consistent, smooth performance that handles the rugged demands of a classic 4WD workhorse without sacrificing street drivability.

Features

• CrossTune Technology: A unique progressive valving system provides a custom-tuned ride to ensure optimal control during both high-speed impacts and low-speed maneuvers.
• Twin-Tube Design: A 2.25-inch diameter shock body provides increased fluid capacity to ensure cooler operating temperatures and dent resistance in harsh environments.
• Nitro-Carburized Piston Rod: The heavy-duty 16mm rod construction provides superior corrosion resistance and strength to ensure long-term seal integrity.
• Polyurethane Bushings: High-performance polyurethane material provides enhanced durability and vibration dampening to ensure a quiet and stable ride.

Technical Specifications

Fitment

• 1969-1986 GMC K2500 4WD
• Note: Configured for vehicles with 2.5-4″ of rear lift height.

What’s Included

• Includes 2 Shocks (Pair)
• Installation Sleeves and Bushings
• Protective Red Shock Boots

Why Choose This Product?

• Engineering Advantage: Rancho’s CrossTune valving allows the shock to transition seamlessly between different terrain types by managing fluid flow more efficiently than standard twin-tube shocks.
• Performance Benefit: Drivers experience reduced body roll and improved towing stability while maintaining the “plush” feel required for daily driving.

Related Products

Front Only (Same Series):
Rancho RS5000X 2.5-4" Front Lift Shocks for 1969-1986 GMC K2500 4WD

RS90000XL (Rear):
Rancho RS90000XL 2.5-4" Rear Lift Shocks for 1969-1986 GMC K2500 4WD

RS7MT (Rear):
Rancho RS7MT 2.5-4" Rear Lift Shocks for 1969-1986 GMC K2500 4WD

RS90000XL (Front):
Rancho RS90000XL 2.5-4" Front Lift Shocks for 1969-1986 GMC K2500 4WD

RS5000X (Kit):
Rancho RS5000X 2.5-4" Lift Shocks for 1969-1986 GMC K2500 4WD

RS90000XL (Kit):
Rancho RS90000XL 2.5-4" Lift Shocks for 1969-1986 GMC K2500 4WD

Frequently Asked Questions

Will these shocks lift my truck?
No, these shocks do not create lift. They are specifically valved and sized to accommodate GMC K2500 models that have already been modified with a 2.5 to 4-inch suspension lift.

What is the benefit of the RS5000X gas pressurization?
The shocks are pressurized to 150 PSI with nitrogen gas, which helps reduce the air-to-oil mixture (foaming), preventing performance fade during heavy off-road use.

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