Vehicle Fitment: Compatible with 2002 Cadillac Escalade EXT, 2002 Chevrolet Avalanche 1500 2500, 2001-2002 Chevrolet Silverado 1500HD 2500HD 3500, 1999-2002 Chevrolet Silverado 1500 2500, 2000-2002 Chevrolet Suburban 1500 2500 Tahoe, 2001-2002 GMC Sierra 1500HD 2500HD 3500, 1999-2002 GMC Sierra 1500 2500, 2000-2002 GMC Yukon XL 1500 2500 Yukon HVAC air temperature blend door actuator Replace Part Number: 604-113 Function: The blend door actuator controls the temperature of air from AC vents and recirculation/ outside air into the interior of the vehicle. It helps the vehicle's HVAC system operate reliably and efficiently, delivering comfortable temperature to you High Durability: Ensures accurate air door operation for proper airflow direction adjustment, improving driving comfort.Built with high-strength plastics and premium motor components to withstand frequent temperature changes and extended use. Warm Tips: Please confirm your old parts with pictures and model numbers before buying. If the Mode Motor Assembly is faulty, please contact us for a replacement. In addition, if you have any other questions about our HVAC heater blend door actuator, please contact us as soon as possible