Four Seasons 37537 HVAC Recirculation Door Actuator

HVAC Recirculation Door Actuator Overview

Four Seasons 37537 is an HVAC air door actuator for vehicles with automatic temperature control and dual-zone climate control applications. It is used in recirculation and air door control systems to help direct cabin airflow where the HVAC system commands it.

This Four Seasons Air Door Actuator line is built for direct-fit HVAC service on a wide range of GM trucks and SUVs, including Cadillac Escalade, Chevrolet Silverado, and GMC Sierra applications. The 37537 part number is commonly searched for recirculation door actuator replacement on GM climate control systems.

• HVAC air door actuator for recirculation and blend-door style control functions
• Female door linkage
• 3 mounting ears for secure attachment
• 5 terminal pins for electrical connection
• Direct replacement style for select ATC and dual-zone HVAC systems

Detailed Product Description

Four Seasons 37537 is a replacement HVAC recirculation door actuator designed for vehicles that use electronic air door control. It helps move the internal HVAC door that manages recirculated air and airflow routing, which is important for maintaining proper cabin temperature and vent operation. This part number 37537 is listed across multiple GM platforms, including Cadillac Escalade, Chevrolet Silverado, and GMC Sierra models from 2003-2014, with fitment varying by year, model, and HVAC configuration.

Fitment includes applications such as 2007-2014 Cadillac Escalade, left main or right main; 2007-2014 Chevrolet Tahoe, left main or right main; and 2007-2014 GMC Yukon, left main or right main. It also covers many Automatic Temperature Control and Dual Zone Climate Control setups found in Silverado, Sierra, Suburban, Yukon XL, Avalanche, and Hummer H2 vehicles.

This part cross-references Autotecnica GM0613018 for the same application.

Common HVAC Problems It May Solve

• Recirculation door not responding to HVAC commands
• Airflow stuck on one vent mode or temperature setting
• Clicking or repeated movement from the dash HVAC system
• Loss of proper cabin air routing in ATC or dual-zone systems
• Inconsistent vent operation in GM truck and SUV climate control systems

Installation Notes and Tips

Verify the vehicle’s HVAC configuration, position, and connector style before ordering. This actuator uses a female linkage, 3 mounting ears, and a 5-pin terminal layout, so matching the original unit is important for proper operation. Confirm whether the application is left main, right main, upper main, lower main, or N/A as listed in the fitment data for your exact vehicle.

• Fits 2007-2014 Cadillac Escalade, left main.
• Fits 2007-2014 Cadillac Escalade, right main.
• Fits 2007-2014 Chevrolet Tahoe, left main.
• Fits 2007-2014 Chevrolet Tahoe, right main.
• Fits 2007-2014 GMC Yukon, left main.
• Fits 2007-2014 GMC Yukon, right main.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with broad coverage for GM climate control service applications. The 37537 actuator is cataloged for direct replacement use in supported vehicles and HVAC configurations, with fitment defined by year, make, model, position, and system type.