The blend door actuator or air temperature blend door controls the combination of hot and cold air from your AC and heater. Additionally it controls the direction the air flows. When the factory blend door actuator fails you can loose control over the AC in your Chevy Impala or other vehicles. This replacement blend door actuator will restore your heater and ac controls in your Chevy, Buick, Cadillac, or Pontiac. Fits The Following Vehicles: .
