Dorman 604-134 HVAC Blend Door Actuator - Main

HVAC Blend Door Actuator for Select GM Vehicles

Dorman 604-134 is an HVAC heater blend door actuator built to match the fit and performance of the original unit on specific Chevrolet, Buick, and Cadillac applications. It uses a rotary switch activation design and a plastic housing for direct replacement service in the HVAC system.

Compatible With 2004-2016 Chevrolet Impala, Chevrolet Impala Limited, Chevrolet Corvette, Buick Allure, Buick LaCrosse, Cadillac XLR, Chevrolet Malibu, Pontiac Grand Prix, and Chevrolet Monte Carlo applications listed below.

Key Features

• Rotary switch activation type for HVAC blend door control
• Plastic construction
• Direct replacement for the original blend door actuator on listed vehicles
• Used for mode selection in the HVAC box
• Cross-references Standard Ignition ADR4212 and SKP SK604134 for the same application

Detailed Description

This Dorman HVAC blend door actuator, part number 604-134, is engineered for specific GM vehicles where the HVAC system relies on a rotary actuator to move the blend or mode door. It is designed to restore proper air distribution control in the cabin and is listed for 2004-2016 Chevrolet Impala and Impala Limited, 2005-2013 Chevrolet Corvette, 2005-2009 Buick Allure and LaCrosse, 2004-2009 Cadillac XLR, 2004-2008 Chevrolet Malibu, 2004-2008 Pontiac Grand Prix, and 2004-2007 Chevrolet Monte Carlo. The 604-134 replacement is a practical choice when the original actuator no longer responds correctly or no longer positions the HVAC door as intended.

Common Issues This Part Can Address

• HVAC air not changing between panel, floor, and defrost outlets
• Temperature blend door movement that is inconsistent or stuck
• Clicking or repeated actuator noise from the dash area
• Loss of proper cabin airflow direction control
• HVAC system response problems tied to the blend door actuator

Installation Notes and Tips

Verify the vehicle year, make, model, and HVAC position before ordering. This actuator is listed for the Main position and is used for mode selection in the HVAC box on the applications shown. Compare the connector, mounting points, and original actuator style to the removed part before installation. After replacement, cycle the HVAC controls to confirm the door moves through all commanded positions.

Quality Assurance

Dorman states that this heater blend door actuator is precision-engineered to match the quality and performance of the original part on the listed vehicles. Part number 604-134 is built as an OE-style replacement for service on the specified GM applications.