ACDelco Gold (Professional) AC Compressors pump refrigerant through the system and are a high quality replacement ideal for many vehicles on the road today. The compressor is typically engine driven via the drive belt, and an AC compressor clutch can be used to engage and disengage the compressor. Hybrid vehicles are typically equipped with an electric motor driven compressor. The compressor is lubricated by OEM specific refrigerant oil. These Gold (Professional), premium aftermarket replacement components are manufactured to meet your expectations for fit, form, and function. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.