KYB 5650023 MonoMax Rear Shock for 2019-2021 Silverado/Sierra 1500 Z85

Vehicle Fitment

• 2019-2021 Chevrolet Silverado 1500 (Custom, LT, LTZ, RST, High Country, WT, 2WD/4WD, 2.7L I4, 4.3L V6, 5.3L V8, 6.2L V8, 3.0L I6 Diesel where equipped with Z85)
• 2019-2021 GMC Sierra 1500 (Elevation, SLE, SLT, Base, 2WD/4WD, 2.7L I4, 4.3L V6, 5.3L V8, 6.2L V8, 3.0L I6 Diesel where equipped with Z85)

Fitment Notes

• Rear shock absorber application specifically calibrated for the Z85 Increased Capacity chassis package.
• Fits both 2WD and 4WD configurations where the vehicle is equipped with the Z85 suspension.
• Two rear shocks are required for a complete rear-axle replacement.
• Not for Silverado 1500 or Sierra 1500 models without the Z85 chassis package.
• Not for Trail Boss or AT4 configurations using their dedicated factory suspension configurations unless Z85 compatibility is specifically confirmed.
• 2022-2026 Silverado 1500/Sierra 1500 fitment was not verified for KYB 5650023 and is not included.

Features

• KYB MonoMax high-performance rear shock absorber.
• Application-specific calibration for Z85 Increased Capacity suspension.
• High-pressure monotube gas-charged design.
• Large-diameter piston engineered for increased strength and damping control.
• Hardened 1/2-inch diameter piston rod provides enhanced durability.
• Monotube construction helps reduce aeration and maintain consistent damping.
• Designed to provide increased damping control compared with conventional twin-tube designs.
• Helps improve rear suspension control under increased payload conditions.
• Direct bolt-on replacement for the specified factory rear shock application.
• Non-adjustable, vehicle-specific performance shock absorber.

Specifications

• Brand: KYB
• Part Number: 5650023
• Product Line: MonoMax
• Product Type: High-pressure monotube gas-charged shock absorber
• Position: Rear
• Side: Left or right rear
• Adjustment: Non-adjustable
• Platform: Chevrolet Silverado 1500 / GMC Sierra 1500
• Model Years: 2019-2021
• Suspension Requirement: Z85 Increased Capacity chassis package
• Drivetrain: 2WD/RWD or 4WD where Z85-equipped
• Engine Coverage: 2.7L I4, 4.3L V6, 5.3L V8, 6.2L V8, and 3.0L I6 Diesel where cataloged with Z85
• Quantity Required: 2 per vehicle

Included Components

• 1x KYB 5650023 MonoMax rear shock absorber

Product Description

The KYB 5650023 MonoMax is a high-performance rear shock absorber specifically designed for 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks equipped with the Z85 Increased Capacity chassis package. Its high-pressure monotube construction and application-specific valving are engineered to provide stronger damping control than conventional twin-tube shock designs, making it well suited to trucks that regularly operate with increased payload demands.

The large-diameter piston and hardened 1/2-inch piston rod provide the strength and durability required for light-truck applications, while the monotube design helps maintain consistent damping performance during demanding suspension movement. The 5650023 is installed at the rear axle and is sold individually, with two units required for a complete rear-shock replacement. Verify the vehicle's Z85 RPO code before installation because this shock is specifically calibrated for the Increased Capacity suspension package.