Rancho RS5000X Gas Shock Absorber for 2011-2025 Chevrolet/GMC Silverado/Sierra 2500 HD/3500 HD RS55378

Fits 2011-2025 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD across all trim levels including High Country, Denali, AT4, and WT.

The Rancho RS5000X shock absorber (MPN: RS55378) features a twin-tube design engineered to improve handling and control on heavy-duty pickups. Utilizing Rancho's Progressive Engagement Valving, this shock reduces initial impact harshness at low speeds while maintaining firm control during aggressive off-road driving or towing. The nitrogen gas charge is pressurized to 150 PSI to minimize oil aeration and prevent damping fade under heavy cycling.

Built for durability in extreme environments, the RS5000X includes a 16mm nitro-carburized piston rod for superior corrosion resistance and double-welded loops at critical stress points. The large-bore body is filled with all-weather fluid, allowing the shock to operate consistently in temperatures ranging from -40 to 248°F.

• 16mm nitro-carburized piston rod resists scuffs and corrosion
• 35mm sintered iron piston for increased structural integrity
• 150 PSI nitrogen gas pressurized to reduce foaming and shock fade
• Cross Tuned technology for optimized rebound and compression valving
• Polyurethane rebound bumper and rubber bushings for improved ride quality
• Includes polyvinyl protective boot to shield the rod and oil seal
• Manufacturer Part Number: RS55378