Rear Suspension Shock - (Single)

Features:

• Supports stock height rear suspension
• Fits 2011-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
• Double Welded Loops
• 2.75" Tri-Tube Body
• 18mmNitro-Carburized Rod
• 9-Position Tuning, and External Knob
• Self Lubricating, Low Friction Seal
• Protective Boot
• Limited Lifetime Warranty

High-Quality for Smooth Rides

The Rancho Rear Shock Absorber is equipped with nine levels of performance. Levels 1-3 are the softest settings, perfect for a supple ride and extremely slow speed flexibility. Levels 4-6 are the choice for daily driving and control, with similar ride characteristics as the RS5000X series shock. Levels 7-9 are excellent for towing and maximum control during fast off-road situations. This all in one shock allows for a 400% change in control from softest to firmest, making it the best choice for those that use their vehicles in varying driving situations.

Adds Better Performance to your Off-Road Adventures

Rancho top of the line Rear Shock Absorber, 9 way adjustable, shock absorbers are ideal for on and off-road use, towing, and for vehicles with larger tires. The adjustable dampening enhances ride while counteracting suspension forces caused by lift kits and larger than stock tires. The Rancho rear shock absorber is globally recognized as the first commercially available 9-way adjustable shock and is backed by Rancho's 90 days Free Ride Offer and a limited lifetime warranty.

Fitment:  2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.6L Duramax (Stock Height)

Shock Specs:

• Compressed Length: 16.06in
• Extended Length: 25.4in
• Travel Length: 9.49in
• Lower Mounting Code: LS47
• Upper Mounting Code: LS47
• Parts Pack: None

Notes:

• Sold individually, order two for rear replacement.
• Fits 2011-2025 Duramax HD models.
• Designed for stock height rear suspension.
• Verify vehicle fitment before ordering.
• Use RS994379 when RS999379 is unavailable.
• Nine damping settings adjust manually.
• Compatible with left or right rear.
• Includes protective shock boot.
• Confirm stock ride height before purchase.
• Professional installation is recommended.
• Backed by Rancho limited lifetime warranty.
• (1) Rancho RS9000®XL rear shock.
• Product images may be representative.

Install Instructions