KYB KG5478 Shock Absorber - Front

KYB Gas-a-just Front Shock Absorber

The KYB Gas-a-just shock absorber is a monotube front suspension upgrade for GM trucks and SUVs that need firmer control, quicker response, and stable damping under load. Part number KG5478 is built for front applications on Chevrolet Express, GMC Savana, C/K trucks, Tahoe, Yukon, and related models.

Gas-a-just uses separate hydraulic and high-pressure nitrogen chambers to keep oil and gas isolated, which supports fade-resistant operation and consistent response during normal driving and heavier-duty use. For shoppers searching for a front shock absorber for a 1996-2002 Chevrolet Express 1500 or a KYB KG5478 replacement for a 1995-1999 GMC Yukon, this part is built around those needs.

Key Features

• Monotube design with separate gas and oil chambers for consistent damping
• Up to 25% more damping performance than original equipment shocks
• Valving and components tuned for GM truck applications
• Higher gas pressure improves steering response and control
• Triple chrome plated piston rod helps reduce seal wear
• Supports vehicles used for towing, hauling, and larger tire and wheel setups
• Front position application

Product Details

Gas-a-just is KYB’s performance-oriented shock line for drivers who want more control than a conventional twin-tube design. The monotube construction helps the shock react quickly to suspension movement, while the high-pressure nitrogen charge keeps damping more consistent as conditions change. That makes KG5478 a practical choice for Chevrolet C1500, GMC C1500 Suburban, Chevrolet Tahoe, and similar GM platforms where front-end stability matters.

Cross-reference: this part cross-references Monroe Shocks & Struts 911513 for the same application.

What It Helps Address

• Excessive front-end bounce over bumps and dips
• Reduced steering response during lane changes or braking
• Shock fade from heat and repeated suspension movement
• Front suspension instability on towing or hauling setups
• Wear-related fluid leakage from aging shock absorbers

Installation Notes

Fits 1996-2002 Chevrolet Express 1500, front; 1996-2002 Chevrolet Express 2500, front; 1996-2002 Chevrolet Express 3500, front; 1996-2002 GMC Savana 1500, front; 1996-2002 GMC Savana 2500, front; 1996-2002 GMC Savana 3500, front; 1988-2000 Chevrolet C2500, front; 1988-2000 Chevrolet C3500, front; 2000 Chevrolet Tahoe, front; 1999-2000 GMC C2500, front; 1999-2000 GMC C3500, front; 1988-1999 Chevrolet C1500, front; 1992-1999 Chevrolet C1500 Suburban, front; 1992-1999 Chevrolet C2500 Suburban, front; 1995-1999 Chevrolet Tahoe, front; 1988-1999 GMC C1500, front; 1992-1999 GMC C1500 Suburban, front; 1992-1999 GMC C2500 Suburban, front; 1995-1999 GMC Yukon, front; 1988-1998 GMC C2500, front; 1988-1998 GMC C3500, front; 1996 GMC G3500, front.

Verify compressed length 9.57 in., extended length 14.09 in., and stroke length 4.53 in. before installation. Lower mount type is E3(55X77X10) and upper mount type is S1. Dust cover, internal rebound spring, and B-stop are not included.

Quality Assurance

KYB designs Gas-a-just shocks with a high-pressure monotube layout to separate gas and oil for fade-resistant operation and immediate response. The triple chrome plated piston rod is used to help reduce seal wear and support long-term sealing performance.