KYB KG5780 Shock Absorber - Front

KYB Gas-a-Just Front Shock Absorber

The KYB Gas-a-Just KG5780 is a monotube front shock absorber built for Chevrolet Express 1500, GMC Savana 1500, Chevrolet Express 2500, and GMC Savana 2500 applications. It uses separate gas and oil chambers for quick response, consistent damping, and reduced fade during demanding driving.

Key Features

• Up to 25% more damping performance than original equipment shocks
• Monotube design separates gas and oil for fade-free operation and fast response
• Higher gas pressure improves steering response
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Components and valving are tuned for GM vans
• Designed for vehicles that work, tow, or run larger, heavier tires and wheels
• Dust cover included

Product Details

Gas-a-Just is KYB’s performance-oriented monotube shock line. The KG5780 uses an air-free hydraulic working area for control and a high-pressure nitrogen chamber with a floating piston for added support when load, road input, or driving demand increases. That design helps maintain consistent damping on Chevrolet Express and GMC Savana front suspension applications, including 2003-2014 Chevrolet Express 1500 front, 2003-2014 GMC Savana 1500 front, 2003-2007 Chevrolet Express 2500 front with 7300 GVW, and 2003-2007 GMC Savana 2500 front with 7300 GVW. This part cross-references Monroe Shocks & Struts 911255 for the same application.

Common Problems This Shock Can Address

• Excessive front-end bounce after bumps or dips
• Reduced steering response from worn OE shocks
• Shock fade during repeated load changes or towing
• Fluid leakage caused by seal wear
• Loss of control feel on vans with heavier tires and wheels

Installation Notes and Tips

Verify compressed length, extended length, and mount types before installation: compressed length 9.05 in., extended length 12.99 in., stroke length 3.94 in., lower mount type E3 (51.6 x 87 x 15), upper mount type S1. This shock is for front position use only on the listed Chevrolet Express and GMC Savana applications. Confirm vehicle year, model, and GVW notes before ordering. Part number KG5780 should be matched to the exact suspension configuration shown in the fitment data.

Quality Assurance

KYB is a major OE suspension supplier, and the Gas-a-Just line is engineered with monotube construction and high-pressure gas separation to maintain consistent damping performance under demanding use.