Four Seasons 73183 HVAC Blend Door Actuator - Auxiliary
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Four Seasons
 Air Door Actuator

Four Seasons 73183 HVAC Blend Door Actuator - Auxiliary

Brand Four Seasons 73183
Position Auxiliary
Door Linkage Cam
Mounting Ear Qty. 4
Style HVAC Air Door Actuator
Terminal Pin Qty. 5
Product line Air Door Actuator
Fits Cadillac · 7 vehicles

Air door actuator. Controls HVAC airflow with a cam-style linkage.

5-pin connector. Uses a five-terminal electrical interface for reliable control.

4 mounting ears. Provides a secure, stable installation.

Cross-references Four Seasons 73183, 604175 and 1573025 for the same application. See all 8.

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Four Seasons 73183 Air Door Actuator

The Four Seasons 73183 HVAC blend door actuator is an air door actuator built for precise control of airflow inside the climate system. It uses a cam-style door linkage, a 5-pin terminal layout, and a 4-ear mounting design for a direct-fit service replacement in the auxiliary HVAC position.

Key Features

  • Four Seasons Air Door Actuator line for HVAC air distribution control
  • Cam-style door linkage for blend door movement
  • 5 terminal pins for electrical connection
  • 4 mounting ears for secure installation
  • Direct replacement part number 73183
  • Cross-reference application: 604175, 1573025

Detailed Description

Four Seasons 73183 is an HVAC blend door actuator used to move the air door in the auxiliary climate control system. In 2005-2011 Cadillac STS applications, this actuator helps regulate how air is directed through the HVAC case, supporting proper temperature and airflow control. The Four Seasons Air Door Actuator product line is focused on replacement components for climate-control service, and this unit is identified by part number 73183 for ordering and catalog matching.

Compatible With 2005-2011 Cadillac STS, auxiliary position. This part cross-references 604175 and 1573025 for the same application.

Common Issues This Part Can Address

  • Incorrect air distribution between vents and temperature zones
  • Loss of response when changing HVAC settings
  • Stuck or inconsistent auxiliary blend door movement
  • Airflow that does not match the selected climate control setting

Installation Notes and Tips

Verify the connector style, 5-pin terminal layout, cam linkage, and 4-ear mounting pattern before installation. Confirm the auxiliary HVAC position on the vehicle and compare the original actuator to Four Seasons 73183 to ensure proper fitment on 2005-2011 Cadillac STS models.

Quality Assurance

Four Seasons catalogs this part as an HVAC air door actuator for service replacement use. Part number 73183 is listed with defined linkage, terminal, and mounting specifications to support accurate application matching.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2011CadillacSTSAuxiliaryAir Door Actuator
2010CadillacSTSAuxiliaryAir Door Actuator
2009CadillacSTSAuxiliaryAir Door Actuator
2008CadillacSTSAuxiliaryAir Door Actuator
2007CadillacSTSAuxiliaryAir Door Actuator
2006CadillacSTSAuxiliaryAir Door Actuator
2005CadillacSTSAuxiliaryAir Door Actuator
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 731836041751573025655165789023391A60183BDAC1182MT18607