ACDelco GM Original Equipment A/C Compressor Clutch Kits include the compressor clutch, which engages and disengages the compressor when the A/C is switched ON and Off, and other related components. The compressor clutch consists of a pulley, pressure plate, and electromagnetic coil. This original equipment A/C compressor clutch kit is a GM-recommended replacement for you vehicle's original components and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.