ACDelco GM Original Equipment A/C Compressors pump refrigerant through the system and are GM-recommended replacements for your vehicle's original components. The compressor is typically engine driven via the accessory belt, and a clutch on the compressor is used to engage and disengage the compressor. Hybrid vehicles are typically equipped with an electric motor driven compressor. The compressor is lubricated by refrigerant oil. This original equipment A/C compressor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.