Gates 90K-39159A Serpentine Belt Drive Component Kit

Accessory Belt Drive Kit for Heavy Duty Service

Gates FleetRunner Heavy Duty Serpentine Kits simplify accessory drive service with one complete part number for the serpentine belt system. This kit is built around the belt, tensioner, and idlers needed for confirmed applications, helping restore proper belt tracking and tension on heavy-duty trucks.

Compatible With 2013-2016 Chevrolet Silverado 2500 HD, 2013-2016 Chevrolet Silverado 3500 HD, 2013-2016 GMC Sierra 2500 HD, and 2013-2016 GMC Sierra 3500 HD in the listed configurations.

Key Features

• Gates Accessory Belt Drive Kit, part number 90K-39159A
• Includes belt, tensioner, and idlers for serpentine system service
• Belt part number K061187HD with 119.31 in. outside circumference and 20 mm top width
• Tensioner assembly part number 39159
• Idler pulley part numbers 38006 and 38006
• FleetRunner Heavy Duty line focused on service-ready serpentine drive components

Detailed Description

The Gates FleetRunner Heavy Duty Serpentine Kits line is built for fleet maintenance where a single service package helps reduce downtime and simplify parts selection. Part number 90K-39159A combines the belt, tensioner, and idlers specified for the listed Chevrolet Silverado HD and GMC Sierra HD applications. The kit uses belt K061187HD, measuring 119.31 inches outside circumference and 20 mm in top width, along with tensioner 39159 and idlers 38006 to match the accessory drive layout called out for each vehicle configuration.

This part number is a direct service solution for 2013-2014 GMC Sierra 2500 HD and Sierra 3500 HD with a single alternator, plus 2014 Chevrolet Silverado 2500 HD and Silverado 3500 HD with a single alternator. It also covers 2015-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD, and 2015-2016 GMC Sierra 2500 HD and Sierra 3500 HD with a 150A alternator. This part cross-references Gates 90K-39159A for the same application.

What It Helps Address

• Worn or stretched serpentine belt condition
• Loss of proper belt tension from a fatigued tensioner
• Belt noise caused by worn idler pulleys
• Accessory drive service on high-mileage Chevrolet Silverado HD and GMC Sierra HD trucks
• Uneven belt tracking in the accessory belt drive system

Installation Notes and Tips

Verify engine accessory layout, alternator output, and model year before ordering. This kit is listed for specific Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD configurations, so match the vehicle notes exactly to the application. Inspect pulley alignment, belt routing, and adjacent accessory components during service to confirm the new parts operate correctly after installation.

Quality Assurance

Gates FleetRunner Heavy Duty kits are organized to support proper serpentine system service with application-specific components selected for the listed vehicles. The kit format helps technicians replace the belt drive components together rather than sourcing each part separately.