MAS Chassis IA90289 Steering Idler Arm and Bracket Assembly
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MAS Chassis

MAS Chassis IA90289 Steering Idler Arm and Bracket Assembly

Brand MAS Chassis IA90289
Material Steel
Length 199
Color Black
Finish Coated
Pre-Greased Yes
Bracket Stud Thread Diameter 16
Arm Stud Thread Diameter 32
Castle Nut Included No
Arm Attachment Type Bracket
Bracket Hole Quantity 1
Grease Fitting Included Yes
Shape L shape
Mounting Hole Diameter 17
Bracket Stud Included Yes
Grade Type Standard
Mounting Hardware Included Yes
Package Contents 1 steering idler arm; 1 nut
Fits Chevrolet and GMC · 75 vehicles

OE-style replacement. Matches original fit and function for steering linkage service.

Steel construction. Coated finish and black color add corrosion-resistant surface protection.

Pre-greased design. Includes a grease fitting for routine lubrication maintenance.

Cross-references Delphi TA5584, Mevotech Supreme MS50914 and MOOG Chassis Products K400018 for the same application. See all 8.

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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Steering Idler Arm and Bracket Assembly options

Steering Idler Arm Assembly Overview

The MAS Chassis IA90289 steering idler arm and bracket assembly is built to match the original part’s fit and function for specific heavy-duty truck applications. It is a direct replacement style component for restoring steering linkage support and consistent steering response.

Key Features

  • Steel construction with a coated black finish for durable service.
  • Pre-greased design for ready-to-install service.
  • Includes a grease fitting for routine lubrication maintenance.
  • Bracket stud and mounting details are engineered for the specified application.
  • Standard-grade replacement part for steering system repair.

Detailed Description

This steering idler arm and bracket assembly is designed for Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications listed in the fitment data. The IA90289 helps restore proper steering linkage support when the original assembly is worn, loose, or no longer maintaining correct geometry. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle coverage includes Fits 2020-2025 Chevrolet Silverado 2500 HD, Fits 2020-2025 Chevrolet Silverado 3500 HD, Fits 2018-2025 GMC Sierra 2500 HD, Fits 2018-2025 GMC Sierra 3500 HD, Fits 2011-2019 Chevrolet Silverado 2500 HD, Fits 2011-2019 Chevrolet Silverado 3500 HD, Fits 2011-2018 Chevrolet Silverado 2500, Fits 2015-2018 Chevrolet Silverado 3500, Fits 2011-2013 Chevrolet Silverado 3500, Fits 2011-2017 GMC Sierra 2500 HD, and Fits 2011-2017 GMC Sierra 3500 HD.

What It Is Used For

  • Correcting steering looseness caused by wear in the idler arm assembly.
  • Replacing a damaged or corroded steering support component.
  • Restoring stable steering linkage alignment.
  • Addressing steering play or inconsistent road feel.

Installation Notes and Tips

Verify the vehicle year, make, model, and steering linkage configuration against the fitment data before installation. Inspect related steering components for wear and replace any damaged parts as needed to complete the repair properly. Grease the assembly according to service requirements after installation.

Quality Assurance

MAS Chassis engineers this assembly to match original fit, function, and performance targets for the listed applications.

Related reading

This part fits 75 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelNotes
2025ChevroletSilverado 2500 HD—
2025ChevroletSilverado 3500 HD—
2025GMCSierra 2500 HD—
2025GMCSierra 3500 HD—
2024ChevroletSilverado 2500 HD—
2024ChevroletSilverado 3500 HD—
2024GMCSierra 2500 HD—
2024GMCSierra 3500 HD—
2023ChevroletSilverado 2500 HD—
2023ChevroletSilverado 3500 HD—
2023GMCSierra 2500 HD—
2023GMCSierra 3500 HD—
2022ChevroletSilverado 2500 HD—
2022ChevroletSilverado 3500 HD—
2022GMCSierra 2500 HD—
2022GMCSierra 3500 HD—
2021ChevroletSilverado 2500 HD—
2021ChevroletSilverado 3500 HD—
2021GMCSierra 2500 HD—
2021GMCSierra 3500 HD—
2020ChevroletSilverado 2500 HD—
2020ChevroletSilverado 3500 HD—
2020GMCSierra 2500 HD—
2020GMCSierra 3500 HD—
2019ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2019ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2019GMCSierra 2500 HD—
2019GMCSierra 3500 HD—
2018ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2018ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2018ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2018ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2018GMCSierra 2500 HD—
2018GMCSierra 3500 HD—
2017ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2017ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2017ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2017ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2017GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2017GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2016ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2016ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2016ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2016ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2016GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2016GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2015ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2015ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2015ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2015ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2015GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2015GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2014ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2014ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2014ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2014GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2014GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2013ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2013ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2013ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2013ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2013GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2013GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2012ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2012ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2012ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2012ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2012GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2012GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2011ChevroletSilverado 2500Includes Bracket; Includes Idler Arm Bracket
2011ChevroletSilverado 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2011ChevroletSilverado 3500Includes Bracket; Includes Idler Arm Bracket
2011ChevroletSilverado 3500 HDIncludes Bracket; Includes Idler Arm Bracket
2011GMCSierra 2500 HDIncludes Bracket; Includes Idler Arm Bracket
2011GMCSierra 3500 HDIncludes Bracket; Includes Idler Arm Bracket
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Delphi — TA5584Mevotech Supreme — MS50914MOOG Chassis Products — K40001816-0470545C1131160300984068279JIA118