Rancho RS7MT 4″ Lift Shocks for 2011-2018 GMC Sierra 2500HD

Description
Rancho RS7MT 4″ Lift Shocks for 2011-2018 GMC Sierra 2500HD

Rancho RS7MT 4″ Lift Shocks for 2011-2018 GMC Sierra 2500HD / 3500HD

Part Number: RS77380

Summary: The Rancho RS7MT monotube shock series is engineered for high-performance handling and rapid heat dissipation on leveled or lifted GMC Sierra heavy-duty trucks. Designed with a high-pressure nitrogen gas charge and a floating piston, these shocks eliminate aeration and oil foaming to maintain consistent damping under heavy loads. Configured specifically for 4-inch lift heights, the RS7MT provides the precise response needed for both highway stability and aggressive off-road exploration.

Features

• Monotube Design: A high-pressure nitrogen gas charge provides a consistent, fade-free damping response to ensure precise vehicle control during rapid suspension cycling.
• Internal Floating Piston: The physical separation of gas and oil provides zero aeration to ensure predictable performance in extreme environments.
• Hardened Nitro-Churyl Shaft: A 14mm heavy-duty piston rod provides superior corrosion resistance and strength to ensure long-term durability against road debris.
• Application-Specific Valving: Custom-tuned internal shim stacks provide optimized compression and rebound to ensure a controlled ride for heavy-duty chassis.

Technical Specifications

Fitment

• 2011-2018 GMC Sierra 2500HD
• 2011-2018 GMC Sierra 3500HD
• Note: Designed for vehicles equipped with 4-inch suspension lift kits.

What’s Included

• Includes Full Set (See Below)
• (2) RS77380 Front Shocks
• (2) RS77381 Rear Shocks
• Protective Dust Boots

Why Choose This Product?

• Engineering Advantage: The monotube architecture reacts faster than traditional twin-tube shocks, making it the ideal choice for heavy-duty trucks that require immediate damping correction.
• Performance Benefit: Improved heat dissipation prevents “shock fade,” allowing you to maintain towing stability and steering precision even during long hauls or off-road use.

Related Products

RS5000X (Front):
Rancho RS5000X 4" Front Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS5000X (Rear):
Rancho RS5000X 4" Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS7MT (Rear):
Rancho RS7MT 4" Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS7MT (Front):
Rancho RS7MT 4" Front Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS90000XL (Rear):
Rancho RS90000XL 4" Rear Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS90000XL (Front):
Rancho RS90000XL 4" Front Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS5000X (Kit):
Rancho RS5000X 4" Lift Shocks for 2011-2018 GMC Sierra 2500HD

RS90000XL (Kit):
Rancho RS90000XL 4" Lift Shocks for 2011-2018 GMC Sierra 2500HD

Frequently Asked Questions

Are these shocks adjustable?
No, these are Tier 3 Monotube shocks featuring application-specific valving that automatically adjusts to road inputs through high-speed shim stacks.

Will these shocks lift my Sierra?
No. These shocks are designed to accommodate a 4-inch lift that has already been installed via a suspension system; they do not create lift height themselves.

Can I install these on a stock height truck?
These are specifically lengthened for 4-inch lifts; installing them on a stock height truck may result in the shock bottoming out and potential internal damage.