The AcDelco 12673657 Belt Tensioner is a must-have for drivers of 2500HD 3500 Series Silverado and Sierra trucks from 2017 to 2022. This original equipment manufacturer (OEM) part is designed to reduce wear and tear on your engine by providing precise tensioning of the serpentine belt. It's easy to install, offering you a quick fix that gets you back on the road in no time. The superior quality construction ensures this tensioner will last as long as your vehicle, meaning you can have peace of mind when it comes to safety and reliability while driving. Get back the reliable performance you expect from your vehicle with the AcDelco 12673657 Belt Tensioner.