KYB 345624 Suspension Shock Absorber - Front

KYB Excel-G Front Shock Absorber for Heavy-Duty GM Trucks

KYB Excel-G part number 345624 is a front suspension shock absorber built to restore original ride control, stability, and steering response on select Chevrolet Silverado HD and GMC Sierra HD trucks. It is an OE-style replacement for drivers who want factory-correct damping without changing the vehicle’s intended handling balance.

Key Features

• KYB recommended OEM replacement shock
• Nitrogen gas-charged twin-tube design
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves for controlled tire contact and body motion
• Dust cover included
• Made in USA
• Designed to support electronic safety systems by helping the suspension operate as engineered
• Strong strut body and bracket construction to reduce flex and maintain alignment

Product Details

The KYB Excel-G line is built on KYB OE manufacturing processes and uses OE-quality components to return the suspension to its original performance characteristics. This KYB Excel-G shock absorber, part number 345624, is calibrated for front-end control on heavy-duty GM trucks, helping maintain predictable braking feel, lane-change response, and handling consistency. It cross-references Monroe Shocks & Struts 72447 for the same application.

Compatible With 2024 Chevrolet Silverado 2500 HD, front; 2021-2024 Chevrolet Silverado 3500 HD, front; 2024 GMC Sierra 2500 HD, front; 2021-2024 GMC Sierra 3500 HD, front; 2020-2023 Chevrolet Silverado 2500 HD, front; 2020-2023 GMC Sierra 2500 HD, front; 2011-2020 Chevrolet Silverado 3500 HD, front; 2011-2020 GMC Sierra 3500 HD, front; 2011-2019 Chevrolet Silverado 2500 HD, front; and 2011-2019 GMC Sierra 2500 HD, front.

What It Helps Address

• Excessive front-end bounce after bumps
• Loose or unsettled steering feel
• Reduced body control during braking and lane changes
• Uneven tire contact caused by worn damping
• Suspension performance loss on heavy-duty GM truck front ends

Installation Notes and Tips

Verify the vehicle is not equipped with a lifted package where noted in the fitment data. Confirm compressed length, extended length, and mount style before installation: compressed length 13.66 in, extended length 17.95 in, stroke length 4.29 in, lower mount type SPECIAL, upper mount type E3(96X120X0). This part is for the front position only and should be installed in pairs when replacing worn shocks on both sides of the axle.

Quality Assurance

KYB supplies shocks and struts to new vehicle manufacturers, and the Excel-G line is produced on KYB OE assembly lines using OE-quality components. The design focuses on restoring original ride control and maintaining the suspension behavior the vehicle was engineered to deliver.