Dorman 604-117 HVAC Blend Door Actuator - Left Main or Main

Dorman 604-117 HVAC Blend Door Actuator

This Dorman HVAC blend door actuator is built for specific GM vehicles that need precise mode control from the heater and air conditioning system. It is engineered to match the quality and performance of the original actuator, making it a direct replacement for common HVAC blend door concerns on Buick Rendezvous, Pontiac Aztek, Pontiac Montana, and Oldsmobile Silhouette applications.

Key Features

• Rotary switch activation for HVAC mode control
• Plastic housing for OE-style fit and function
• Designed as a direct replacement blend door actuator
• Matches original performance on select vehicle years, makes, and models
• Part number 604-117 for easy identification

Detailed Description

Dorman 604-117 is a heater blend door actuator for the HVAC system, used to move the blend or mode door and direct airflow where the driver selects. This actuator is a fit for 2002-2007 Buick Rendezvous, Main, with RPO Code C60 or CJ3 front manual temperature controls; 2001-2005 Pontiac Aztek, Left Main; 2001-2005 Pontiac Montana, Main; and 2001-2004 Oldsmobile Silhouette, Main. If you are searching for a 2002-2007 Buick Rendezvous HVAC blend door actuator or a 2001-2005 Pontiac Montana mode actuator, this part number 604-117 is the correct OE-style replacement for those listed applications.

This part cross-references Standard Ignition ADR138 for the same application.

What It Helps Fix

• Airflow stuck on one vent setting
• Loss of mode selection between defrost, panel, and floor outlets
• HVAC clicking or repeated actuator movement
• Inconsistent response when changing temperature or airflow settings
• Failed blend door actuator operation in the dash HVAC system

Installation Notes and Tips

Verify the vehicle’s year, make, model, position, and HVAC option code before ordering. This actuator uses a rotary activation design and is intended for the listed Main and Left Main positions only. Confirm the original connector style and mounting location on the vehicle before installation, and inspect the blend door linkage for binding or damage that could affect actuator operation.

Quality Assurance

Dorman designs this HVAC heater blend door actuator to match the quality and performance of the original part on the specified applications. The part number 604-117 is built as a replacement component for select GM HVAC systems and is identified for straightforward catalog matching.