Moog K400018 Steering Idler Arm

Moog K400018 Steering Idler Arm

The Moog K400018 steering idler arm is a direct-fit chassis component for heavy-duty Chevrolet Silverado 2500 HD and 3500 HD, as well as GMC Sierra 2500 HD and 3500 HD applications. Built with a pre-greased design and an included grease fitting, it supports smoother serviceability and easier maintenance on the steering linkage.

Key Features

• Pre-greased for initial installation convenience
• Grease fitting included for routine lubrication service
• Length: 157.0 mm / 6.181 in.
• Steering idler arm for steering gear and related components
• Moog K400018 replacement part for select HD truck applications

Fitment and Application

Compatible with 2011-2024 Chevrolet Silverado 2500 HD and Chevrolet Silverado 3500 HD, plus 2011-2024 GMC Sierra 2500 HD and GMC Sierra 3500 HD applications. For 2011-2019 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD, the design includes a bracket and is shaped for easier installation. The Moog K400018 is also a fitment-based replacement for these heavy-duty steering systems where the idler arm is serviced as part of the linkage.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Steering linkage looseness caused by a worn idler arm
• Excess play or wandering in the front steering system
• Maintenance delays when a serviceable grease point is needed
• Fitment issues on Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD steering repairs
• Replacement needs for a worn Moog K400018 steering idler arm assembly

Installation Notes

Verify vehicle year, make, and model before installation. For 2011-2019 Chevrolet Silverado 2500 HD and 3500 HD, and GMC Sierra 2500 HD and 3500 HD applications, the bracketed design supports easier installation. After installation, grease the fitting according to the vehicle service schedule and inspect steering linkage alignment and fastener condition.

Quality Assurance

MOOG continually updates its chassis components with design improvements aimed at extending service life and simplifying replacement. The K400018 reflects that approach with a serviceable, pre-greased steering idler arm design for HD truck steering maintenance.