GM Genuine Parts A/C Expansion Valves are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These A/C expansion valves are metering devices that control the flow of refrigerant into the evaporator. The expansion valve meters the flow of liquid refrigerant based on the evaporator core temperature, keeping it just above freezing. 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).

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• Responsible for removing pressure from within the liquid refrigerant, which alters the state from a liquid, to a vapor in the evaporator
• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
• Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
• GM regularly updates production and service part designs to integrate new materials and technologies