Gates 36177 Accessory Drive Belt Idler Pulley - Grooved Pulley or Upper

OE-Style Idler Pulley for GM Belt Drive Systems

The Gates DriveAlign Premium OE Pulley 36177 is an accessory drive belt idler pulley built for OE-quality fit and function in passenger cars and light trucks. It uses a steel body with a 6-groove V-ribbed contact surface to support proper belt tracking in the accessory drive system.

Compatible With Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Savana 3500, and other listed GM applications, this pulley is a direct replacement choice for vehicles that use a grooved pulley position and do not have AC in the specified configuration.

Key Features

• Gates DriveAlign Premium OE Pulley line for OE-style replacement fit
• Accessory drive belt idler pulley for grooved pulley applications
• Steel construction for durable service in belt drive systems
• 6-groove V-ribbed grooved contact surface
• 85 mm outside diameter and 29 mm width
• 12 mm bearing bore inside diameter
• Flanged pulley design

Product Details

Part number 36177 is engineered as a single idler pulley for the accessory drive belt system. The DriveAlign Premium OE Pulley line is built to match OE-style fitment across passenger car and light truck applications, including Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and related GM trucks and vans listed in the fitment data. This part cross-references Continental 49165 for the same application.

With a steel pulley body, 6 grooves, and a flanged profile, this component helps maintain belt alignment in grooved pulley positions. It is listed for vehicles in the 1996-2016 model years, with fitment varying by make, model, and AC configuration.

What This Pulley Helps Address

• Belt noise caused by a worn idler pulley bearing
• Uneven belt tracking in the accessory drive system
• Visible pulley wear on grooved belt routing applications
• Accessory drive vibration related to pulley surface damage
• Loss of proper belt support in GM truck and van belt drives

Installation Notes and Tips

• Verify the vehicle does not have AC where the fitment notes specify that restriction.
• Confirm the pulley position is grooved and matches the listed 6-groove configuration.
• Check bearing bore, outside diameter, and width against the original part before installation.
• Inspect the belt for wear or glazing before installing the new pulley.
• Use the vehicle’s service information to confirm routing and torque specifications.

Quality Assurance

Gates DriveAlign Premium OE Pulley components are built to OE-quality fit standards for the listed Chevrolet and GMC applications. Part number 36177 is supported by interchange references including Dayco 89170 and Litens 900249A.