This part is a bearings, all. Bearing kit. Silverado, sierra. Includes One Standard Upper and Lower Bearing. For 2017-19 Includes Upper, Lower, and Thrust Bearings., for Chevrolet, and GMC Trucks cars. These bearings 100% fits for General Motors cars. It's made of top-quality materials, it has passed not only all manufacturer's tests but also General Motors quality control and has to endure rough road conditions over a long time.