Dorman 419-091 Accessory Drive Belt Idler Pulley - Right

Accessory Drive Belt Idler Pulley Replacement

Dorman 419-091 is a replacement accessory drive belt idler pulley built to match the function and performance of the original pulley on select vehicles. It helps restore proper belt routing and accessory drive operation on applications such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade.

• OE-style replacement for select accessory drive belt systems
• Serpentine pulley design with 5 grooves
• Steel and plastic construction with black finish
• Flanged pulley design for stable belt tracking
• Hex bolt head type with 10 mm mounting hole diameter
• OEM grade replacement part
• Cross-reference: Gates 36610

Detailed Product Overview

This Dorman accessory drive belt idler pulley, part number 419-091, is engineered for direct replacement use on select GM and Chevrolet applications. It features a serpentine pulley profile, 76.2 mm pulley width, 76.2 mm outside diameter, and a single bearing layout to support smooth belt movement. The black pulley assembly uses steel and plastic materials and is designed to restore the original belt path on vehicles including the Chevrolet Silverado 1500, GMC Sierra, and Cadillac Escalade.

Compatible With 2021 Cadillac Escalade and Escalade ESV, 2020-2021 Chevrolet Cheyenne, 2019-2021 Chevrolet Silverado 1500, 2021 Chevrolet Tahoe, 2019-2021 GMC Sierra and Sierra 1500, 2021 GMC Yukon and Yukon XL, and 2014-2015 Chevrolet Cruze, right, grooved pulley. Part number 419-091 also cross-references 12700122 for the same application.

Common Issues This Part Addresses

• Noise from a worn or rough idler pulley bearing
• Belt misalignment caused by pulley wear
• Accessory drive belt tracking problems
• Visible pulley damage, cracking, or surface wear
• Loss of proper belt tension routing in the drive system

Installation Notes and Tips

Verify pulley diameter, groove count, mounting hole size, and belt path before installation. This replacement idler pulley uses a hex bolt head and a 10 mm mounting hole diameter, so confirm the mounting point matches the original hardware layout on your vehicle. Always inspect the belt and adjacent accessory drive components for wear before completing the repair.

Quality Assurance

Dorman designs this replacement pulley to match the original part’s function and performance on the listed applications. It is an OEM-grade replacement intended to restore normal accessory drive operation on the specified Chevrolet, GMC, and Cadillac vehicles.