Dayco 89703 Accessory Drive Belt Tensioner Assembly

Accessory Drive Belt Tensioner for GM Applications

Dayco 89703 is an automatic accessory drive belt tensioner assembly for serpentine belt systems. It is built for clockwise rotation and uses a single pulley to maintain proper belt tension across the accessory drive system.

Compatible with a wide range of Chevrolet, GMC, Buick, and Cadillac vehicles, including Camaro, Colorado, Malibu, Canyon, Blazer, Acadia, Envision, Regal Sportback, Regal TourX, Equinox, Terrain, ATS, CTS, Impala, Traverse, CT6, Regal, and Malibu Limited applications.

Key Features

• Automatic accessory drive belt tensioner assembly
• Serpentine belt type
• Clockwise rotation
• Single pulley design
• Pulley 1 diameter: 70 mm
• Pulley 1 width: 25.84 mm
• Pulley 1 flat: Yes
• Dayco part number 89703

Detailed Description

Dayco 89703 is an accessory drive belt tensioner assembly engineered for serpentine belt systems that require automatic tension control. The 70 mm pulley with a flat profile and clockwise direction supports consistent belt tracking in the accessory drive system. This part number 89703 is listed for multiple GM platforms, making it a direct replacement option for many Chevrolet Camaro, Chevrolet Colorado, and Chevrolet Malibu applications, along with GMC Canyon and GMC Terrain models.

Fitment includes 2016-2023 Chevrolet Camaro, 2015-2022 Chevrolet Colorado, 2013-2022 Chevrolet Malibu, 2015-2022 GMC Canyon, 2019-2021 Chevrolet Blazer, 2017-2021 GMC Acadia, 2016-2020 Buick Envision, 2018-2020 Buick Regal Sportback, 2018-2020 Buick Regal TourX, 2018-2020 Chevrolet Equinox, 2018-2020 GMC Terrain, 2013-2019 Cadillac ATS, 2014-2019 Cadillac CTS, 2014-2019 Chevrolet Impala, 2018-2019 Chevrolet Traverse, 2016-2018 Cadillac CT6, 2014-2017 Buick Regal, and 2016 Chevrolet Malibu Limited.

Common Issues This Part Can Address

• Loss of proper serpentine belt tension
• Belt squeal or chirping from a worn tensioner
• Uneven belt tracking on the accessory drive system
• Reduced belt control from a failing pulley or spring mechanism
• Accessory drive noise related to tensioner wear

Installation Notes and Tips

Verify pulley diameter, width, rotation direction, and belt routing before installation. Confirm the vehicle application by year, make, and model, since Dayco 89703 is used across multiple GM platforms. Inspect the serpentine belt, idler pulleys, and related accessory drive components during service so the new tensioner can operate against a properly aligned belt path.

Quality Assurance

Dayco is a recognized supplier in belt drive system components, and this tensioner assembly is built to match the requirements of listed GM applications. Part number 89703 is specified for direct-fit use in the vehicles shown above.