Rancho RS5000X 2.5-4″ Rear Lift Shocks for 1969-1980 GMC K1500 4WD

Rancho RS5000X 2.5-4″ Rear Lift Shocks for 1969-1980 GMC K1500 4WD

Part Number: RS55112

Summary: The Rancho RS5000X series utilizes a cross-tuned twin-tube gas pressurized design to provide exceptional durability and ride quality for your GMC K1500. Engineered to manage the increased unsprung weight of larger tires, these shocks feature a unique progressive engagement valving system that minimizes harshness during initial impacts. This configuration is specifically tuned for vehicles with 2.5 to 4 inches of rear lift, ensuring a smooth street ride without sacrificing off-road capability.

Features

• Progressive Engagement Valving: Custom-tuned velocity-sensitive discs provide a gradual transition between damping circuits to ensure a smooth ride over small bumps and chatter.
• Gas Pressurized Twin-Tube: Low-pressure nitrogen gas charge provides consistent damping performance to ensure reduced aeration and foaming during spirited driving.
• High-Capacity 2.25-inch Body: An enlarged shock body provides increased fluid capacity to ensure cooler operating temperatures during heavy-duty use.
• Nitro-Carburized Piston Rod: The 16mm heavy-duty rod construction provides superior scuff and corrosion resistance to ensure long-term seal integrity.

Technical Specifications

Fitment

• 1969-1980 GMC K1500 4WD
• Note: Designed for vehicles with 2.5″ to 4″ of rear lift height.

What’s Included

• Includes 2 Shocks
• Protective Black Shock Boots
• Necessary Bushings and Hardware

Why Choose This Product?

• Engineering Advantage: Rancho’s Cross-Tuned technology optimizes the relationship between the compression and rebound cycles for a balanced feel on leaf-spring applications.
• Performance Benefit: The driver experiences a significant reduction in “body roll” and “axle hop” while maintaining a comfortable, factory-plus ride quality on the pavement.

Related Products

Front Only (Same Series):
Rancho RS5000X 2.5-4" Front Lift Shocks for 1969-1980 GMC K1500 4WD

RS7MT (Rear):
Rancho RS7MT 2.5-4" Rear Lift Shocks for 1969-1980 GMC K1500 4WD

RS90000XL (Rear):
Rancho RS90000XL 2.5-4" Rear Lift Shocks for 1969-1980 GMC K1500 4WD

RS90000XL (Front):
Rancho RS90000XL 2.5-4" Front Lift Shocks for 1969-1980 GMC K1500 4WD

RS5000X (Kit):
Rancho RS5000X 2.5-4" Lift Shocks for 1969-1980 GMC K1500 4WD

RS90000XL (Kit):
Rancho RS90000XL 2.5-4" Lift Shocks for 1969-1980 GMC K1500 4WD

Frequently Asked Questions

Will these shocks lift my GMC K1500?
No, these shocks do not create lift. They are specifically length-tuned to work with vehicles that already have a 2.5-inch to 4-inch rear lift kit installed.

Are the shock boots included with the RS5000X?
Yes, this pair includes protective black polyvinyl boots to shield the piston rod from road debris and off-road contaminants.

What is the benefit of the twin-tube design for my truck?
The twin-tube design provides an outer reserve tube that protects the inner working cylinder from dents, ensuring that a rock strike off-road won’t cause the shock to seize.