Rancho RS5000X Series Twin-Tube Shock Absorber for 2011-2025 Chevrolet Silverado / GMC Sierra 2500 HD & 3500 HD RS55377

Fits 2011-2025 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD trucks.

Improve the ride quality and handling of your heavy-duty truck with the Rancho RS5000X Series shock absorber (RS55377). Designed for both on-road comfort and demanding off-road use, this twin-tube gas-pressurized shock features Rancho’s exclusive Cross Tuned technology. This system utilizes a unique rebound valving system and an advanced compression phase to deliver precise control, whether you are daily driving or hauling heavy payloads.

• Advanced Valving: Progressive Engagement Valving (PEV) is custom-tuned to reduce initial impact at low speeds while maintaining firm control during high-speed compression.
• Durable Construction: Built with a 16mm nitro-carburized piston rod for scuff and corrosion resistance, plus a 35mm sintered iron piston for enhanced structural integrity.
• Fade Resistance: Pressurized with 150 PSI nitrogen gas to minimize air-to-oil foaming, ensuring consistent damping performance even during heavy-duty cycles.
• All-Weather Reliability: A large twin-tube body filled with all-weather fluid allows for cooler operation and reliable performance in temperatures ranging from -40 to 248°F.
• Reinforced Design: Features double-welded loops at stress areas, a fluon-banded piston for responsiveness, and a protective polyvinyl boot to shield the rod.

This shock absorber includes polyurethane rebound bumpers and rubber bushings to further isolate road harshness and vibrations. Manufacturer Part Number: RS55377.