Rancho RS5000X Gas Shock Absorber RS55379 for Select 2011-2025 Chevrolet/GMC Silverado/Sierra 1500/2500/3500 HD

Fits select 2011-2025 Chevrolet Silverado and GMC Sierra 1500, 2500 HD, and 3500 HD models.

The Rancho RS5000X RS55379 gas shock absorber is engineered for drivers who demand consistent performance both on and off-road. Utilizing Rancho's exclusive Cross Tuned technology, this twin-tube shock features a unique Progressive Engagement Valving system. This system reduces initial impact harshness at low speeds while maintaining the firm control required for heavy-duty hauling and technical terrain.

• Precision Engineering: Features a 35mm sintered iron piston and an application-specific piston area to deliver heightened control of shock motion.
• Durable Construction: Built with a 16mm nitro-carburized piston rod for scuff and corrosion resistance, plus double-welded loops at high-stress points.
• Temperature Resistance: Large twin-tube body is filled with all-weather fluid designed to withstand internal temperatures ranging from -40 to 248°F.
• Fade Reduction: Pressurized with nitrogen gas to 150 PSI to minimize air-to-oil foaming and ensure consistent damping performance under heavy use.
• Complete Protection: Includes a durable polyvinyl protective boot to shield the rod and seal, along with polyurethane rebound bumpers and rubber bushings to absorb ride harshness.
• Specifications: Twin-tube gas pressurized design; 16mm rod diameter; 35mm piston diameter; 150 PSI nitrogen charge; MPN: RS55379.