GM Genuine Parts A/C Evaporator Core and Case Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These A/C evaporator core and case assemblies include an evaporator and case. A/C evaporator cores are heat exchangers located in the HVAC housing, where they cool and dehumidify the cabin air. These evaporators feature aluminum channel-plate construction for durable, lightweight performance while maintaining efficiency and resistance to corrosion. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).