KYB Suspension Shock Absorber 554389 - view 2

KYB Suspension Shock Absorber P/N:554389

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$112.99

MPN: 554389

UPC: 781552665106

Item Package Quantity: 1

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KYB Suspension Shock Absorber P/N:554389

$112.99

Description

Keep your GM truck's rear suspension planted with the KYB shock absorber 554389, a high-pressure monotube Gas-a-just gas shock. This rear-position KYB gas shock absorber drops in as a direct-fit replacement for the 2011-2024 Chevrolet Silverado 2500 HD, 2011-2024 Chevrolet Silverado 3500 HD, 2011-2024 GMC Sierra 2500 HD, and 2011-2024 GMC Sierra 3500 HD.

Monotube design: separates the gas and oil into two working chambers for fade-free operation and instant response.
Two-chamber layout: an air-free hydraulic piston and valve area for control, plus a high-pressure nitrogen gas chamber with a floating piston that keeps a comfortable ride in normal driving and adds damping on demand.
Built for GM trucks: components and valving designed specifically for GM trucks, with additional damping over OE for vehicles that work, tow, and run larger, heavier tires and wheels — up to 25% more damping than original-equipment shocks.
Triple chrome-plated piston rod: an ultra-smooth rod that reduces seal wear, since fluid leaking can be a cause of shock failure.

The higher gas pressure responds quickly to improve steering response and helps keep Electronic Safety Systems performing as designed.

Interchange: 20906289 · 20906290 · 20906291 · 20906292 · 911303

Manufacturer's Description

Product Specs

Buyer's Guide

Interchange Part Numbers

This part cross-references / interchanges with the following part numbers:

20906289, 20906290, 20906291, 20906292, 911303

Frequently Asked Questions

What is the KYB 554389?

It's a high-pressure monotube Gas-a-just gas shock absorber for the rear of the listed GM trucks, separating gas and oil into two chambers for fade-free operation and instant response.

Does this KYB gas shock absorber fit my truck?

It's a direct-fit rear replacement for the 2011-2024 Chevrolet Silverado 2500 HD and 3500 HD and the 2011-2024 GMC Sierra 2500 HD and 3500 HD. See the Buyer's Guide tab to confirm your vehicle.

How is a monotube different from a twin-tube shock?

The monotube keeps gas and oil in separate chambers, so it resists aeration and fade, and its floating piston adds damping on demand while staying comfortable during normal driving.

Do I need one shock or two?

This listing is for one rear shock, sold individually. Replacing both rear shocks together as a matched pair is recommended for balanced, even damping.

What are signs my rear shocks may need replacing?

Excessive bouncing, poor ride control, wallow or nose-dive over bumps, or fluid leaking from the shock body can be signs a shock may need replacing. Diagnose the cause before replacing.