A blend door moves to vary the amount of air passing through the vehicle’s heater core.The blend door is controlled by a blend door actuator, which can be a cable or an electric motor. The blend door is also referred to by some car makers as an air mix door, both terms mean the same thing. YHTAUTO blend door actuators are specifically designed to achieve or exceed the performance and function of OEM components. Vehicle Information Replacement for Buick: LeSabre 2000-2005 Temperature Actuator RPO Code C67; Front Manual Electronic LeSabre 2000-2005 Air Inlet Acutator RPO Code C67; Front Manual Electronic Replacement for Pontiac: Bonneville 2000-2005 Air Inlet Actuator; Manual Bonneville 2000-2005 Temperature Actuator; Manual Note: It could not fit Mode Actuator Item Specification Item Type: HVAC Heater Blend Door Actuator Material: Plastic Position: Main Number of Terminals: 4 Pins Reference Part Number: 604-118, 15-72646, 89018377, 52474990, 52491801 Read more The Diagram of the Position for Blend Door Actuator What are the symptoms of a bad blend door actuator? The heater blowing cold air The air conditioner blowing hot air Not able to adjust the heater temperatures A ticking sound coming from the dashboard Read more Read more