ACDelco Gold (Professional) Vapor Canisters are a high quality alternative to Original Equipment (OE) parts. These canisters are part of a vehicle's emissions control system and are used to help capture fuel vapors emanating from the fuel tank. They are a component of the vehicle's evaporative emission control (EVAP) system and help prevent the fuel vapors from reaching the atmosphere while also helping maintain proper fuel tank pressures. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.