Rancho RS55379 Shock Absorber - Rear

Overview of Rancho RS5000X Suspension Shock Absorber

The Rancho RS5000X Suspension Shock Absorber (Part Number RS55379) is engineered for heavy-duty trucks like the Chevrolet Silverado 2500 HD and 3500 HD, as well as the GMC Sierra 2500 HD and 3500 HD. Designed to provide reliable damping performance, this shock absorber supports enhanced vehicle control and ride comfort under demanding conditions.

• Compressed length: 16 inches
• Extended length: 25.28 inches
• Travel length: 9.28 inches
• Includes dust shield for added protection
• Extended bumper stop included
• Lower and upper mounting: Loop bushing & sleeve mount (9/16" sleeve ID x 1.5/8" sleeve OAL)
• Reserve tube diameter: 2.074 inches

RS5000X Product Line Features

The RS5000X line from Rancho is designed to deliver consistent performance for trucks requiring durable suspension components. This product line focuses on providing extended travel and robust construction to handle heavy loads and rough terrain. The RS55379 shock absorber benefits from these design principles, offering a balance of comfort and control for Chevrolet and GMC heavy-duty pickups.

Detailed Product Description

The Rancho RS55379 shock absorber features a compressed length of 16 inches and an extended length of 25.28 inches, allowing for a travel length of 9.28 inches. This range supports effective suspension articulation and helps maintain tire contact with the road or trail surface. The inclusion of a dust shield protects internal components from debris, extending the service life of the shock. An extended bumper stop is incorporated to prevent damage during full compression. Both the upper and lower mounts utilize loop bushing and sleeve mounts with precise dimensions (9/16" sleeve ID x 1.5/8" sleeve OAL), ensuring secure and stable installation on compatible Chevrolet Silverado and GMC Sierra models.

Common Applications and Problem Solving

• Improves ride quality on rough or uneven terrain
• Reduces suspension bottoming and harsh impacts
• Enhances vehicle stability under heavy load conditions
• Replaces worn or damaged factory shocks on Silverado 2500 HD and 3500 HD
• Restores proper suspension travel and damping performance

Installation Notes and Tips

Installation of the Rancho RS55379 shock absorber requires matching the upper and lower mounting codes (Ls47) to the vehicle’s suspension points. Ensure the loop bushing and sleeve mounts are properly aligned and secured to prevent premature wear. The dust shield should be inspected during installation to confirm it is intact and positioned correctly. No additional parts pack is included, so verify that all necessary hardware is available before beginning installation.

Quality Assurance and Warranty

Rancho RS5000X shocks are manufactured to meet OEM standards for durability and performance. The RS55379 shock absorber undergoes quality control testing to ensure consistent damping characteristics and structural integrity. While specific warranty details are not provided here, Rancho typically offers limited warranties on their suspension components. Consult Rancho or the product documentation for exact warranty terms.