KYB KG54100 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for GM Vans and SUVs

The KYB Gas-a-Just KG54100 is a rear monotube shock absorber built for GM vans and SUVs that need firmer control, quicker response, and consistent damping. It is engineered for applications such as Chevrolet Express, GMC Savana, Tahoe, Yukon, and Suburban models where load handling and suspension stability matter.

Gas-a-Just Performance Features

• Monotube design separates gas and oil for fade-resistant operation and immediate response.
• Up to 25% more damping performance than original equipment shocks.
• High-pressure nitrogen gas helps improve steering response and suspension control.
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage.
• Valving and components are tuned for GM vans and heavier-duty rear suspension demands.
• Supports vehicles that tow, carry loads, or run larger tires and wheels.
• Designed to help electronic safety systems operate as the vehicle manufacturer intended.

Product Details and Line Information

Gas-a-Just is KYB’s monotube shock line for drivers who want more control than a conventional twin-tube design can provide. The KG54100 uses separate working chambers with an air-free hydraulic section for responsiveness and a high-pressure gas section for consistent ride quality during normal driving, then adds damping as conditions demand. This part cross-references Monroe Shocks & Struts (e.g., 911085) for the same application.

Key dimensions include a compressed length of 14.21 inches, extended length of 22.95 inches, and stroke length of 8.74 inches. Mounting details are E2 lower mount type 14.6x41 and E3 upper mount type 61.6x87x0, with a dust cover included.

What This Shock Absorber Helps Address

• Excessive rear bounce or oscillation on Chevrolet Express and GMC Savana vans.
• Reduced control when towing, hauling, or carrying heavier rear loads.
• Soft or inconsistent rear damping on Chevrolet Tahoe, GMC Yukon, and Suburban applications.
• Shock fade caused by heat buildup and aeration in standard twin-tube designs.
• Steering and body control issues from worn rear suspension damping.

Installation Notes

Fits 2003-2007 Chevrolet Express 2500, rear; 2003-2007 GMC Savana 2500, rear; 1996-2002 Chevrolet Express 1500, rear; 1996-2002 Chevrolet Express 2500, rear; 1996-2002 Chevrolet Express 3500, rear; 1996-2002 GMC Savana 1500, rear; 1996-2002 GMC Savana 2500, rear; 1996-2002 GMC Savana 3500, rear; 2000 Chevrolet Tahoe, rear; 1992-1999 Chevrolet C1500 Suburban, rear; 1992-1999 Chevrolet C2500 Suburban, rear; 1995-1999 Chevrolet Tahoe, rear; 1992-1999 GMC C1500 Suburban, rear; 1992-1999 GMC C2500 Suburban, rear; 1995-1999 GMC Yukon, rear; 1996 GMC G3500, rear.

Verify rear suspension configuration and GVW notes before installation, especially on Express, Savana, and dual rear wheel applications. For Chevrolet Express and GMC Savana models, confirm the listed GVW and rear suspension setup matches the vehicle before ordering. Professional installation is recommended for proper ride height, alignment, and damping performance.

Quality Assurance

KYB designs the Gas-a-Just line as a monotube performance shock absorber with fade-resistant operation and durable piston rod construction. The KG54100 is built to meet the demands of GM van and SUV rear suspension applications while maintaining consistent control over time.