GM Genuine Parts A/C Refrigerant Liquid Hoses are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These hoses connect the condenser outlet to the expansion valve or orifice tube. The liquid hose or line carries liquid refrigerant from the condenser toward the evaporator. 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).