Manage cabin temperature and airflow with the Dorman - OE Solutions HVAC Blend Door Actuator 604-110, the MAIN-position air door actuator that drives the blend door to control the mix of hot and cold air through the heating and cooling system. It installs as a direct-fit replacement for the 2003-2009 Chevrolet TrailBlazer, 2003-2006 Chevrolet TrailBlazer EXT, 2003-2009 GMC Envoy, 2003-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 2003-2008 Isuzu Ascender, 2003-2004 Oldsmobile Bravada, 2004-2007 Buick Rainier, and 2005-2009 Saab 9-7X — see the Buyer's Guide tab for the full engine-level list.
- Direct-fit design: engineered to drop in like the original air door actuator on the listed years, makes, models and configurations.
- Position specific (MAIN): vehicles often use several HVAC door actuators for different positions and functions — review the application notes to confirm this MAIN unit matches the actuator you need to replace.
- Durable construction: designed and tested to strict standards to help resist wear and electrical burnout for reliable operation.
- Backed by experts: supported by a team of engineers in the United States with more than a century of experience.
Signs the original may need replacing include inconsistent air temperature, a blend door stuck on hot or cold, or a clicking/knocking noise behind the dash. Diagnose the cause before replacing.
Interchange: 15-73596
1573596 · APBDA0027 · ADS157 · F04082 · ADA248 · 73156 · 52402610 · 89018384 · 89018675 · DA1050 · SK604110 · ADR157
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this blend door actuator do?
It's a small electric motor that moves the HVAC blend door to control the mix of hot and cold air, directing temperature and airflow through the vents.
Which position is this actuator?
This is the MAIN-position actuator. Because these vehicles use several HVAC door actuators, review the application notes to confirm it matches the position and function you need to replace.
What vehicles does the 604-110 fit?
It fits applications including the 2003-2009 Chevrolet TrailBlazer, 2003-2009 GMC Envoy, 2003-2008 Isuzu Ascender, 2004-2007 Buick Rainier, and 2005-2009 Saab 9-7X. See the Buyer's Guide tab for the full list.
What are signs this actuator may be failing?
Common signs include air that won't change temperature, a blend door stuck on hot or cold, or a repetitive clicking noise behind the dash. Diagnose the cause before replacing.
What numbers does this part interchange with?
It cross-references 15-73596, APBDA0027, ADS157, F04082, ADA248, 73156, 52402610, 89018384, 89018675, DA1050, SK604110, and ADR157.
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