Gates 39516 Accessory Drive Belt Tensioner Assembly

OE Automatic Belt Tensioner for GM Applications

The Gates DriveAlign Premium OE Automatic Belt Tensioner, part number 39516, is built for accessory drive belt systems that require stable belt control and OE-style fit. It uses a steel housing and a smooth/backside pulley surface to support V-ribbed belt routing on a wide range of Cadillac, Chevrolet, Buick, and GMC vehicles.

Gates applies original equipment system design standards to the DriveAlign Premium OE Automatic Belt Tensioner line, with manufacturing held to rigid tolerances for OE fit, form, and function. This makes 39516 a direct-fit service part for vehicles such as the Cadillac CT5, Chevrolet Blazer, and GMC Acadia.

Key Features

• DriveAlign Premium OE Automatic Belt Tensioner for accessory drive belt systems
• Steel construction for durable service in engine-bay conditions
• OE Exact comparison rating for direct replacement confidence
• Single smooth/backside pulley for V-ribbed belt applications
• Two mounting holes for OE-style installation points
• Gates part number 39516 for easy identification

Detailed Product Overview

This Gates automatic belt tensioner is engineered for OE-style belt management on modern GM platforms. The pulley measures 65 mm outside diameter with a 28 mm width, and the bearing bore inside diameter is 17 mm, supporting consistent belt tracking in the accessory drive system. The tensioner assembly is specified for vehicles including 2020-2025 Cadillac CT5, 2019-2025 Chevrolet Blazer, 2017-2023 GMC Acadia, 2016-2024 Chevrolet Camaro, and 2017-2022 Chevrolet Colorado. Part number 39516 also cross-references Dynomax 39516 for the same application.

Compatible With 2016-2019 Cadillac ATS, 2016-2019 Cadillac CTS, 2016-2020 Cadillac CT6, 2017-2019 Buick LaCrosse, 2018-2020 Buick Regal Sportback, 2017-2022 GMC Canyon, and additional listed Cadillac, Chevrolet, Buick, and GMC applications. The DriveAlign Premium OE Automatic Belt Tensioner line is built to match OE specifications so the replacement aligns with the original belt path and mounting geometry.

What It Helps Address

• Belt squeal caused by weak or inconsistent tension
• Accessory drive belt flutter or vibration
• Uneven belt tracking on V-ribbed belt systems
• Noise from a worn tensioner pulley or bearing
• Loss of proper belt tension in the accessory drive system

Installation Notes and Tips

Verify belt routing, pulley alignment, and mounting-hole alignment before installation. Inspect the accessory drive belt, idler pulleys, and related components for wear so the new tensioner can operate within the correct range. Confirm vehicle application by year, make, and model before ordering part number 39516.

Quality Assurance

Gates manufactures DriveAlign Premium OE Automatic Belt Tensioners to rigid tolerances and specifications intended to deliver OE fit, form, and function. The OE Exact rating reflects a direct-replacement approach for service work on supported Cadillac, Chevrolet, Buick, and GMC vehicles.