ACDelco GM Original Equipment A/C Hose Assemblies connect A/C system components to carry the refrigerant. All parts are GM-recommended replacements for your vehicles original components. These hoses are designed to withstand high pressures and temperatures. The hard lines are typically made from extruded aluminum or sometimes from coated steel. The hose is chemical-resistant and has hydraulically crimped fittings. Service ports are specifically designed for service equipment and the particular refrigerant used. This original equipment A/C hose assembly has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.