Rancho RS55386 Shock Absorber - Rear

Overview of Rancho RS5000X Suspension Shock Absorber

The Rancho RS5000X RS55386 suspension shock absorber is engineered for reliable performance on Buick, GMC, and Oldsmobile SUVs including the Bravada, Envoy, Envoy XL, and Rainier models. Designed to improve ride quality and vehicle control, this shock absorber features durable construction and specific mounting configurations tailored to these vehicles.

• Extended length: 23.09 inches
• Compressed length: 14.56 inches
• Travel length: 8.53 inches
• Includes dust shield for added protection
• Extended bumper stop included
• Upper mounting: Loop bushing & sleeve mount (1/2" sleeve ID x 1.11/16" sleeve OA)
• Lower mounting code: Ls63
• Reserve tube diameter: 2.251 inches

Detailed Product Features and Specifications

The RS55386 shock absorber from Rancho’s RS5000X line is designed with an extended length of 23.09 inches and a compressed length of 14.56 inches, providing a travel length of 8.53 inches. This ensures optimal suspension articulation and damping for SUVs like the Buick Bravada and GMC Envoy. The shock includes a dust shield to protect internal components from debris and an extended bumper stop to help absorb impact and reduce wear. The upper mounting features a loop bushing and sleeve mount with precise dimensions (1/2" sleeve ID x 1.11/16" sleeve OA), while the lower mounting uses the Ls63 code, ensuring compatibility with the specified vehicle models. The reserve tube diameter of 2.251 inches contributes to consistent hydraulic performance under various driving conditions.

About the Rancho RS5000X Product Line

The RS5000X series by Rancho is a line of suspension shock absorbers designed to provide enhanced ride control and durability for a range of SUVs and trucks. This product line focuses on delivering reliable damping performance with features such as dust shields and extended bumper stops to protect the shock absorber and extend its service life. The RS55386 shock absorber is part of this line, engineered specifically for Buick, GMC, and Oldsmobile SUVs, ensuring proper fitment and suspension response.

Common Applications and Problem Solving

• Reduces excessive bouncing and improves ride comfort on Buick Bravada and GMC Envoy models
• Restores suspension control for Oldsmobile Rainier vehicles with worn shocks
• Minimizes bottoming out by utilizing the extended bumper stop
• Protects suspension components from dust and debris with the included dust shield
• Maintains proper suspension travel and vehicle stability during off-road or uneven terrain driving

Installation Notes and Tips

• Verify upper and lower mounting codes (Ls40 upper, Ls63 lower) for compatibility before installation
• Inspect mounting bushings and sleeves for wear and replace if necessary to ensure proper fit
• Use appropriate tools to avoid damage to the loop bushing and sleeve mount
• Check suspension alignment after installation to maintain vehicle handling characteristics

Quality Assurance and Warranty

Rancho RS5000X shock absorbers are manufactured to meet OEM specifications for Buick, GMC, and Oldsmobile SUVs. The RS55386 part undergoes rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, Rancho typically offers coverage against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.