KYB 555055 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Silverado and Sierra

The KYB Gas-a-Just 555055 is a monotube rear shock absorber built as an OE-style replacement for select Chevrolet Silverado 1500 and GMC Sierra 1500 applications. It is designed for trucks that work, tow, or run larger tires and wheels, with quick response and consistent control in everyday driving.

Key Features

• Monotube OEM replacement for rear suspension service
• Separate hydraulic and high-pressure nitrogen chambers for responsive damping
• High-pressure design helps reduce fade during repeated suspension movement
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Built to restore handling and control on full-size GM trucks
• Supports steering response and suspension performance for vehicles with electronic safety systems
• Dust cover included

Product Details

KYB Gas-a-Just shocks use a monotube layout with an air-free hydraulic working area and a separate nitrogen gas chamber. That design gives the shock fast reaction to road inputs while maintaining a controlled ride during normal driving. Part number 555055 is a rear suspension shock absorber for 2007-2024 Chevrolet Silverado 1500 and GMC Sierra 1500 applications listed below, including Z85 chassis and off-road suspension configurations where specified. This part cross-references Monroe Shocks & Struts (e.g., 911533) for the same application.

What It Helps Address

• Excessive rear bounce after bumps or dips
• Reduced control when towing or carrying load
• Soft or inconsistent rear damping on worn shocks
• Delayed steering response caused by tired suspension components
• Ride fade during repeated suspension compression and rebound

Installation Notes

• Fits 2022-2024 Chevrolet Silverado 1500, rear, w/ Z85 Chassis Package; Gas-a-just
• Fits 2022-2024 GMC Sierra 1500, rear, w/ Z85 Chassis Package; Gas-a-just
• Fits 2022 Chevrolet Silverado 1500 LTD, rear, w/ Chassis Z85 Package; Gas-a-just
• Fits 2022 GMC Sierra 1500 Limited, rear, w/ Z85 Chassis Package; Gas-a-just
• Fits 2019-2021 Chevrolet Silverado 1500, rear, w/ Off Road Suspension; Gas-a-just
• Fits 2019-2021 GMC Sierra 1500, rear, w/ Off Road Suspension, w/o Factory Lift; Gas-a-just
• Fits 2019 Chevrolet Silverado 1500 LD, rear, Recommended OEM Replacement; Except Electronic Suspension; Gas-a-just
• Fits 2019 GMC Sierra 1500 Limited, rear, Recommended OEM Replacement; Except Electronic Suspension; Gas-a-just
• Fits 2008-2018 Chevrolet Silverado 1500, rear, Recommended OEM Replacement; (Exc. Electronic Susp.); Gas-a-just
• Fits 2007-2018 GMC Sierra 1500, rear, Recommended OEM Replacement; (Exc. Electronic Susp.); Gas-a-just
• Fits 2007-2013 GMC Sierra 1500, rear, Recommended OEM Replacement; (Exc. Electronic Suspension); Gas-a-just
• Fits 2007 Chevrolet Silverado 1500, rear, Recommended OEM Replacement; (Exc. Electronic Suspension); Gas-a-just

Verify mount style and suspension package before ordering. Upper and lower mounts are E2 (14.6 x 42), with compressed length 15.86 in., extended length 24.68 in., and stroke length 9.02 in. The KYB 555055 is engineered for direct rear shock replacement on the listed Silverado 1500 and Sierra 1500 applications.

Quality Assurance

KYB designs the Gas-a-Just line as an OE monotube replacement to restore factory-style control and handling characteristics. The monotube construction, high-pressure gas charge, and chrome piston rod are used to support consistent damping performance and reduce wear in demanding truck use.