ACDelco GM Original Equipment A/C Accumulators are used in A/C systems with an orifice tube metering device. The accumulator is located between the evaporator and the compressor, and serves to capture and store excess liquid refrigerant. This prevents liquid refrigerant from entering the compressor where it can damage the compressor. This GM Original Equipment A/C Accumulator is a GM-recommended replacement component and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.