Four Seasons 73030 HVAC Mode Door Actuator

Four Seasons 73030 Air Door Actuator Overview

The Four Seasons 73030 Air Door Actuator is an HVAC mode door actuator built for precise control of air distribution inside the cabin. It features a female door linkage, 3 mounting ears, and a 5-pin terminal layout for a direct-fit style replacement in supported applications.

Compatible with 2002 Chevrolet Trailblazer, 2002 Chevrolet Trailblazer EXT, 2002 GMC Envoy, 2002 GMC Envoy XL, and 2002 Oldsmobile Bravada, this Four Seasons Air Door Actuator is a practical choice when the HVAC system is no longer directing airflow correctly. Part number 73030 is also referenced in aftermarket interchange listings for the same application.

Key Features

• HVAC mode door actuator for cabin air direction control
• Female door linkage for the specified actuator connection style
• 3 mounting ears for secure installation alignment
• 5 terminal pins for the listed electrical interface
• Four Seasons Air Door Actuator line for HVAC replacement needs
• Part number 73030 for easy identification and ordering

Product Details

The Four Seasons 73030 is an HVAC air door actuator used to move the mode or recirculation door inside the climate control housing. In the 2002 Chevrolet Trailblazer and Trailblazer EXT, 2002 GMC Envoy and Envoy XL, and 2002 Oldsmobile Bravada, this actuator helps restore proper airflow routing between vents, defrost, and recirculation functions. If the original unit is sticking, losing calibration, or failing to respond, replacing it with the correct actuator can restore normal HVAC operation. Four Seasons 73030 is a direct replacement-style part for the listed vehicles and applications.

This part cross-references Dayco 73030 and Global Parts Distributors LLC 1712073 for the same application.

Common Issues This Part Can Address

• Airflow stuck on one vent setting
• Recirculation door not changing position
• HVAC system blowing air from the wrong outlets
• Clicking or inconsistent actuator movement behind the dash
• Loss of proper mode control in the climate system

Installation Notes and Tips

Verify the connector style, mounting ear layout, and linkage configuration before installation. After replacement, the HVAC system may require recalibration or a key-cycle reset depending on the vehicle’s control strategy. Confirm the actuator is installed in the correct mode-door location for the application and check for related blend door or control head issues if airflow concerns remain.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with coverage across climate control replacement components. The 73030 actuator is listed with defined linkage, mounting, and terminal specifications to support accurate part matching for the confirmed vehicle applications.