HVAC Heater Blend Door Actuator – Reliable Replacement for Precise Climate Control Compatible Vehicle Fitment: Buick Skylark 1991 Cadillac Escalade 1999, 2002–2006 Cadillac Escalade ESV 2003–2006 Chevrolet Astro 1996–2005 Please verify compatibility with your vehicle using the Fitment Filter before . Location Options: Main Auxiliary Auxiliary or Main Rear OEM Part Numbers: 604100 89018356 14455963 16124922 Product Name: HVAC Heater Blend Door Actuator Key Features and Benefits: Direct replacement designed to match OEM specifications for performance and fit Restores accurate temperature control by regulating airflow between heater core and air conditioning evaporator Durable construction for longlasting reliability under varied climate conditions Easy installation with plugandplay electrical connection to factory wiring Ensures consistent cabin comfort in all seasons Performance and Function: This actuator controls the heating and cooling blend door inside your vehicle's HVAC system. It determines how much warm or cool air enters the cabin by adjusting the position of the blend door based on climate control settings. A failing actuator can cause inconsistent temperatures, unusual clicking noises, or inability to change airflow. Installing this replacement restores proper HVAC operation with precise air temperature regulation. Practical Applications: 1. Restoring full climate control in a Cadillac Escalade where the cabin stays only warm despite A/C being on, due to a stuck blend door. 2. Fixing intermittent cold air in a Chevrolet Astro by replacing a worn actuator that no longer moves the blend door correctly. 3. Replacing a noisy actuator in a Buick Skylark to remove constant clicking while adjusting temperature. This HVAC Heater Blend Door Actuator is engineered for specific GM models to ensure exact fit and dependable operation, making it an ideal choice to resolve climate control issues efficiently and effectively.