ACDelco Gold (Professional) Cabin Air Filters are a high quality alternative to Original Equipment (OE) parts. Outside air is drawn into and distributed throughout the vehicle interior with the HVAC (Heating Ventilation & Air Conditioning) blower motor before entering the HVAC system. Air is then filtered with the cabin air filter. 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.