Monroe 58638 Shock Absorber and Coil Spring Assembly - Rear

Monroe Load Adjusting Shock Absorber 58638

Monroe 58638 is a rear load adjusting shock absorber for light trucks that tow or carry changing cargo loads. It uses a heavy-gauge calibrated spring to add control as road conditions and vehicle weight become more demanding.

Key Features

• Load adjusting shock absorber for rear suspension applications
• Heavy-gauge calibrated spring responds to changing load and road conditions
• Metal dust shield helps protect the shock assembly
• Loop bushing and sleeve upper and lower mounts, LS47 code
• Compressed length: 16 in.; extended length: 25.875 in.; travel length: 9.875 in.
• No compressed bumper stop, no extended bumper stop, and no extended hydraulic lockout

Product Details

The Monroe Load Adjusting Shock Absorber line is built for trucks that see regular towing and hauling duty. This Monroe 58638 rear shock absorber adds spring-assisted support to help maintain control when payloads change, making it a practical choice for Chevrolet Silverado 1500 HD, Silverado 1500 HD Classic, Silverado 2500, GMC Sierra 1500 HD, Sierra 1500 HD Classic, and Sierra 2500 rear suspension service. This part cross-references Monroe Shocks & Struts (e.g., 43181, 5001394) for the same application.

Common Problems It Helps Address

• Rear-end sag when carrying cargo or towing
• Reduced control over rough or uneven roads
• Excessive bounce after load changes
• Need for a rear shock absorber matched to towing and hauling use
• Wear-related loss of damping performance in the rear suspension

Installation Notes and Tips

Fits 2007 Chevrolet Silverado 1500 HD Classic, rear; Fits 2007 GMC Sierra 1500 HD Classic, rear; Fits 2005-2006 Chevrolet Silverado 1500 HD, rear; Fits 2001-2003 Chevrolet Silverado 1500 HD, rear; Fits 2005-2006 GMC Sierra 1500 HD, rear; Fits 1999-2004 Chevrolet Silverado 2500, rear; Fits 1999-2004 GMC Sierra 2500, rear; Fits 2001-2003 GMC Sierra 1500 HD, rear. Confirm rear mounting style, LS47 loop bushing and sleeve fitment, and vehicle configuration before installation. This part is listed for vehicles without Electronic Adjustable Suspension where noted, and for Silverado 2500/Sierra 2500 applications except 4 Wheel Steering.

Quality Assurance

Monroe is a long-established suspension brand, and this load adjusting shock absorber is built to match the demands of towing and hauling service. Verify fitment against the vehicle’s suspension configuration and part number 58638 before installation.