Dorman IA90289RD Steering Idler Arm and Bracket Assembly

Dorman RD Steering Idler Arm Assembly

The Dorman RD - Rugged Duty IA90289RD steering idler arm and bracket assembly is built for direct replacement on heavy-duty Chevrolet Silverado and GMC Sierra applications. It matches original fit and function to help restore stable steering response, including on 2011-2025 Chevrolet Silverado 2500 HD and Silverado 3500 HD models, as well as 2011-2025 GMC Sierra 2500 HD and Sierra 3500 HD trucks.

Key Features

• Direct replacement steering idler arm and bracket assembly for select Chevrolet Silverado and GMC Sierra trucks
• Steel construction with a coated black finish for corrosion resistance
• Pre-greased design with grease fitting included for serviceability
• Tapered arm attachment for OE-style steering linkage connection
• Castle nut, cotter pin, ball joint, and bracket stud included in the assembly
• Standard replacement grade for restoring steering geometry and linkage support

Detailed Description

Built for heavy-duty steering systems, the Dorman RD IA90289RD is engineered to match the fit, function, and performance of the original idler arm assembly. It is a practical replacement for worn steering linkage components on Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD trucks, with additional coverage for 2011-2018 Silverado 2500 and 2011-2013 and 2015-2018 Silverado 3500 applications. The steel body, bent shape, and coated finish support long-term durability, while the pre-greased design helps simplify maintenance. This part cross-references MOOG Chassis Products K400018 and Delphi TA5584 for the same application. The IA90289RD part number is also useful when searching for a direct-fit steering idler arm and bracket assembly for HD truck steering repair.

Common Steering Issues It Can Address

• Excessive steering play or looseness in the front steering linkage
• Uneven or wandering steering feel during highway driving
• Clunking or movement from a worn idler arm assembly
• Reduced steering stability caused by worn bracket support
• Service issues related to a damaged or dry steering pivot point

Installation Notes and Tips

Verify vehicle year, make, and model before installation. This assembly uses a tapered arm attachment and a 16 mm arm stud thread diameter, with a 20 mm bracket stud thread diameter and a 20.45 mm mounting hole diameter. The IA90289RD is a direct-fit steering replacement for the listed Chevrolet Silverado and GMC Sierra applications, and the included grease fitting supports routine lubrication after installation.

Quality Assurance

Dorman RD - Rugged Duty focuses on replacement parts built to match original fit and function for demanding truck applications. IA90289RD is a standard replacement steering idler arm and bracket assembly designed for specific Chevrolet Silverado and GMC Sierra HD fitments.