The product is a remanufactured hydroboost brake booster designed for Chevy and GMC 2500HD and 3500HD trucks from the years 2003 to 2007. This booster, compatible with the Chevy Silverado 3500HD model, is made by GM Trucks and can interchange with part number 540-1401. It includes the necessary components for easy installation, focusing on enhancing the braking system's performance and efficiency in these specific vehicle models. Tag#3234 4328