Hayden 5071 Accessory Drive Belt Idler Pulley

Hayden 5071 Accessory Drive Belt Idler Pulley

The Hayden 5071 is a steel accessory drive belt idler pulley built for serpentine belt systems that use a smooth back idler design. It measures 3.000 inches outside diameter with a 1.18-inch pulley width and a .399-inch inside diameter, making it a direct-spec replacement for select Chevrolet Silverado, GMC Sierra, and Express applications.

Hayden’s Pulley line focuses on replacement drive components for belt routing and tension control. This Hayden 5071 idler pulley is a smooth, black steel pulley that meets or exceeds OEM requirements and is intended for vehicles that call for a back idler pulley in the accessory drive belt system.

Key Features

• Steel construction for accessory drive belt service
• Smooth pulley surface for serpentine belt routing
• 3.000-inch outside diameter and 1.18-inch pulley width
• .399-inch inside diameter / 10.160 mm bore diameter
• Black finish
• Single mounting hole design
• Meets or exceeds OEM specifications
• Mounting hardware not included

Detailed Description

Hayden 5071 is an accessory drive belt idler pulley designed for smooth-pulley serpentine belt applications. The back idler style, steel construction, and precise dimensions support proper belt tracking in the accessory drive system. This part cross-references Gates 36310 and Dayco 89165 for the same application. It is a direct-fit option for many Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD trucks, along with Chevrolet Express 2500 and Express 3500 vans that use the specified smooth idler pulley configuration.

Fits 2001-2013 Chevrolet Silverado 2500 HD, N/A. Fits 2007-2013 Chevrolet Silverado 3500 HD, N/A. Fits 2006-2013 Chevrolet Express 2500, N/A. Fits 2006-2013 Chevrolet Express 3500, N/A. Fits 2001-2013 GMC Sierra 2500 HD, N/A. Fits 2007-2013 GMC Sierra 3500 HD, N/A. Fits 2001-2006 Chevrolet Silverado 3500, N/A. Fits 2001-2006 GMC Sierra 3500, N/A. Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A. Fits 2007 Chevrolet Silverado 3500 Classic, N/A. Fits 2007 GMC Sierra 2500 HD Classic, N/A. Fits 2007 GMC Sierra 3500 Classic, N/A.

What It Helps Address

• Noise from a worn or rough idler pulley bearing
• Belt misalignment in the accessory drive system
• Serpentine belt tracking issues on smooth-pulley setups
• Visible pulley wear, wobble, or surface damage
• Loss of proper belt routing support in the drive system

Installation Notes and Tips

Verify the vehicle uses a smooth accessory drive belt idler pulley before ordering. Confirm the 3.000-inch outside diameter, .399-inch bore diameter, and 1.18-inch pulley width match the original part. Mounting hardware is not included, so reuse or source the correct hardware as needed. For best results, inspect the serpentine belt, tensioner, and adjacent pulleys during replacement.

Quality Assurance

Hayden 5071 is built to meet or exceed OEM specifications for the listed applications. The steel pulley construction and OE-style dimensions support consistent fitment in compatible Chevrolet Silverado, GMC Sierra, and Chevrolet Express belt drive systems.