Rancho RS90000XL 2.5-4″ Front Lift Shocks for 1977-1986 GMC K3500 4WD

Description
Rancho RS90000XL 2.5-4″ Front Lift Shocks for 1977-1986 GMC K3500 4WD

Rancho RS9000XL 2.5-4″ Front Lift Shocks for 1977-1986 GMC K3500 4WD

Part Number: RS999001

Summary: The Rancho RS9000XL series delivers industry-leading versatility for the GMC K3500, featuring a globally recognized 9-position manual adjustment knob. This system allows drivers to instantly transition from a soft street ride to a firm setting for heavy-duty towing or off-road stability. Engineered for vehicles with 2.5 to 4 inches of front lift, these shocks provide the specific damping control required to manage increased unsprung weight and higher centers of gravity.

Features

• MyRide 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping resistance to ensure the vehicle is perfectly tuned for daily driving, towing, or off-road use.
• Large Shock Body: A 2.75-inch diameter reserve tube provides increased fluid capacity to ensure cooler operating temperatures during heavy work cycles.
• Nitrogen Gas Pressurization: High-pressure gas charging provides a barrier against oil foaming to ensure consistent damping performance under rapid cycling.
• 18mm Nitro-Carburized Rod: A heavy-duty piston rod provides superior structural rigidity and scuff resistance to ensure long-term seal integrity.

Technical Specifications

Fitment

• 1977-1986 GMC K3500 4WD
• Note: Fits models with 2.5″ to 4″ front lift. Compatible with 2 & 4 Door models equipped with Rancho Suspension.

What’s Included

• Includes 2 Shocks (Pair)
• Protective Red Dust Boots
• Mounting Hardware/Bushings

Why Choose This Product?

• Engineering Advantage: Unlike “one-size-fits-all” shocks, the RS9000XL utilizes a massive body diameter and adjustable valving to accommodate the specific weight demands of a K-Series 1-ton truck.
• Performance Benefit: Drivers gain total control over their ride quality, eliminating the “stiff” ride typically associated with lifted heavy-duty leaf spring suspensions.

Related Products

RS5000X (Rear):
Rancho RS5000X 2.5-4" Rear Lift Shocks for 1977-1986 GMC K3500 4WD

RS5000X (Front):
Rancho RS5000X 2.5-4" Front Lift Shocks for 1977-1986 GMC K3500 4WD

RS5000X (Kit):
Rancho RS5000X 2.5-4" Lift Shocks for 1977-1986 GMC K3500 4WD

Frequently Asked Questions

How do I adjust the firmness of these shocks?
The RS9000XL features a manual 9-position knob located at the base of the shock; simply turn the dial to your preferred setting (1 for softest, 9 for firmest).

Will these shocks lift my GMC K3500?
No, these shocks do not create lift. They are specifically configured for vehicles that already have a 2.5-inch to 4-inch suspension lift installed.

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