ACDelco GM Original Equipment Auxiliary A/C Evaporator and Heater Hose Assemblies are for use with vehicles that have rear A/C. The hose assembly contains the auxiliary evaporator connecting hose and lines that connect the rear evaporator to the front A/C lines. All parts are GM-recommended replacements for your vehicle’s original components and have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.