Four Seasons 73170 HVAC Blend Door Actuator - Left or Right

Four Seasons Air Door Actuator 73170

The Four Seasons 73170 HVAC blend door actuator is a direct-fit air door actuator for select Cadillac CTS and Cadillac SRX applications. It uses an arm-style door linkage, a 7-pin terminal layout, and a 4-ear mounting design to match the original HVAC control interface.

Key Features

• Four Seasons Air Door Actuator line for HVAC blend door control
• Arm-style door linkage for the specified air door application
• 4 mounting ears for secure installation alignment
• 7 terminal pins for the correct electrical connection
• Fits 2003-2005 Cadillac CTS, left or right, with VIN-specific coverage on 2005 models
• Fits 2004-2005 Cadillac SRX, left or right, with VIN-specific coverage on 2005 models

Detailed Description

Four Seasons 73170 is an HVAC blend door actuator built for vehicles that need precise control of air distribution and temperature blend inside the climate system. This air door actuator is listed for 2003-2005 Cadillac CTS and 2004-2005 Cadillac SRX applications, including left and right positions where noted. The part number 73170 is also referenced under interchange numbers used for the same application, helping confirm the correct replacement when matching the original unit.

This Four Seasons Air Door Actuator product line focuses on OE-style HVAC replacement fitment and electrical compatibility. For buyers searching for a Cadillac CTS blend door actuator or Cadillac SRX HVAC air door actuator, the 73170 provides the specified linkage, terminal count, and mounting-ear configuration needed for a proper match.

This part cross-references Global Parts Distributors LLC 1712322 for the same application.

What It Helps Fix

• Incorrect cabin temperature blend from the HVAC system
• Airflow stuck on one vent or one temperature setting
• Clicking or repeated movement from a failing blend door actuator
• Loss of left or right side HVAC air door control
• HVAC response issues tied to a worn actuator motor or linkage

Installation Notes and Tips

Verify the vehicle year, model, position, and VIN break before ordering. This actuator is listed for left and right positions on the specified Cadillac CTS and Cadillac SRX applications, and 2005 models require VIN-based confirmation. Compare the original connector, terminal count, mounting ears, and arm-style linkage to the removed part before installation.

After installation, cycle the ignition and HVAC controls so the system can relearn actuator position if required by the vehicle. Confirm smooth door movement and proper temperature change at both ends of the control range.

Quality Assurance

Four Seasons is a recognized HVAC parts brand, and the 73170 is cataloged as an air door actuator for the listed Cadillac applications. Use the confirmed fitment data and interchange references to verify the replacement before installation.