KYB KG5430 Shock Absorber - Front or Rear

KYB Gas-a-Just Rear Shock Absorber

The KYB Gas-a-just KG5430 is a monotube suspension shock absorber built for GM trucks and vans that need firmer control, quicker response, and consistent damping. It is designed for rear applications on Chevrolet G10, G20, G30 and GMC G1500, G2500, G3500 models, with fitment spanning 1978-1995.

Key Features

• Monotube design separates gas and oil for fade-free operation and immediate response.
• Provides up to 25% more damping performance than original equipment shocks.
• Valving and components are tuned specifically for GM truck applications.
• High gas pressure improves steering response and suspension control.
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage.
• Dust cover included for added protection.
• Compatible with vehicles that work, tow, or use larger, heavier tires and wheels.

Product Details

Gas-a-Just is KYB’s performance-oriented shock line for drivers who want more control than a conventional twin-tube design can provide. The KG5430 uses two separate working chambers: an air-free hydraulic section for responsiveness and a high-pressure nitrogen gas chamber with a floating piston to maintain ride comfort during normal driving while adding damping on demand. This KYB KG5430 shock absorber is a direct-fit rear suspension upgrade for Chevrolet G10, G20, G30 and GMC G1500, G2500, G3500 applications listed below. This part cross-references Monroe Shocks & Struts 37091 for the same application.

What It Helps Address

• Excessive rear-end bounce over uneven pavement
• Reduced control when towing or carrying heavier loads
• Shock fade from heat and aeration during extended use
• Loose steering feel caused by worn rear damping balance
• Premature seal wear related to fluid leakage

Installation Notes and Fitment

Fits 1978-1995 Chevrolet G10, rear. Fits 1978-1995 Chevrolet G20, rear. Fits 1978-1995 Chevrolet G30, rear, excluding motorhome chassis, heavy duty chassis, and dual rear wheel applications. Fits 1979-1995 GMC G1500, rear. Fits 1979-1995 GMC G2500, rear. Fits 1979-1995 GMC G3500, rear, excluding motorhome chassis, heavy duty chassis, and dual rear wheel applications. Fits 1978 GMC G15, rear. Fits 1978 GMC G25, rear. Fits 1978 GMC G35, rear, excluding motorhome chassis, heavy duty chassis, and dual rear wheel applications. Verify compressed length 13.11 in., extended length 20.98 in., and stroke length 7.87 in. before installation. Upper and lower mounts are E2 (12.8 x 41.3), and a dust cover is included.

Quality Assurance

KYB designs Gas-a-Just shocks for controlled damping and consistent performance in demanding GM truck and van use. The KG5430 is engineered to help maintain suspension behavior that supports braking, steering, and electronic safety system operation as the vehicle manufacturer intended.