KYB 3450008 Shock Absorber - Rear

KYB Excel-G Rear Shock for Silverado 3500 HD

KYB Excel-G shock absorber 3450008 is a rear suspension replacement for Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD applications. Built to restore original ride control, it focuses on stability, steering response, and body motion control rather than changing the vehicle’s factory tuning.

Key Features

• KYB recommended OEM replacement shock for rear suspension service
• Fits 2015-2020 Chevrolet Silverado 3500 HD, rear, with dual rear wheels; Excel-G
• Fits 2015-2020 GMC Sierra 3500 HD, rear, with dual rear wheels; Excel-G
• Fits 2011-2014 Chevrolet Silverado 3500 HD, rear; replace suspension strut and coil spring assembly according to manufacturer instructions; Excel-G
• Fits 2011-2014 GMC Sierra 3500 HD, rear; replace suspension strut and coil spring assembly according to manufacturer instructions; Excel-G
• Nitrogen gas-charged twin-tube design with OE-quality components
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Dust cover included
• Compressed length: 13.77 in; extended length: 22.4 in; stroke length: 8.63 in
• Lower mount type: E2(14.6X42); upper mount type: E2(14.6X42)

Product Details

The KYB Excel-G line is built on the same KYB OE assembly lines used for original equipment production and is calibrated to restore factory-designed performance. For Silverado 3500 HD and Sierra 3500 HD rear suspension service, KYB 3450008 is an OE-style shock absorber that helps maintain the vehicle’s intended ride control, lane-change response, and braking stability. This part cross-references Chevrolet 20906293 and 22990476 for the same application.

What This Shock Absorber Helps Address

• Excessive rear bounce or oscillation after bumps
• Reduced stability during towing, hauling, or lane changes
• Loose or delayed steering response caused by worn rear damping
• Uneven tire contact from weakened suspension control
• Loss of factory ride feel on heavy-duty rear suspension setups

Installation Notes

Verify rear fitment by year, model, and dual rear wheel configuration before ordering. For 2011-2014 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD applications, replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Confirm mount dimensions and extended/compressed length against the original part during installation.

Quality Assurance

KYB is a major OE shock and strut supplier, and the Excel-G line is produced to match original equipment specifications for damping and control. Part number 3450008 is engineered for factory-style performance restoration on Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD rear suspension applications.