Dorman 604-108 HVAC Blend Door Actuator – Direct Fit for Select GM Models

Restore precise climate control with the Dorman 604-108 HVAC Blend Door Actuator

The Dorman 604-108 HVAC blend door actuator is engineered to directly replace the original unit in certain GM-era vehicles. By mirroring the fit and function of the factory actuator, it helps re-establish accurate air routing and consistent cabin comfort. This part is designed to work with the same position and function as the original, making your HVAC system more predictable during daily drives and errands.

Important notes: HVAC actuators are position-specific. Vehicles often have multiple actuators for different zones and functions. To ensure you get the correct part, review the application notes and verify that the replacement matches the position and function you need. If you’re unsure, consult a qualified technician. When shopping online, entering your vehicle information will help you see the exact fitment in the tool’s garage view.

Key benefits

• Direct replacement that matches the original fit and function for select years, makes, and configurations
• Position-specific design accounts for different HVAC routes within the same vehicle
• Durable construction designed to resist wear and electrical burnout for reliable operation
• Backed by a US-based team of engineers with extensive experience in vehicle HVAC components
• Fit verification via the garage tool helps you confirm compatibility before purchase

Compatibility snapshot

Listed models include Buick Allure and LaCrosse (2005–2009), Cadillac XLR (2004–2009), Chevrolet Corvette (2005–2013), Chevrolet Impala and Impala Limited, Malibu, Monte Carlo, and Pontiac Grand Prix within the mid-2000s to early-2010s era. Because production varied, always review the application notes for your vehicle’s position and function.

• Buick Allure: 2005–2009
• Buick LaCrosse: 2005–2009
• Cadillac XLR: 2004–2009
• Chevrolet Corvette: 2005–2013
• Chevrolet Impala: 2004–2013
• Chevrolet Impala Limited: 2014–2016
• Chevrolet Malibu: 2004–2008
• Chevrolet Monte Carlo: 2004–2007
• Pontiac Grand Prix: 2004–2008

Real-world use scenarios

• Inconsistent temperatures across zones may improve with a proper actuator replacement
• Steady HVAC performance can enhance comfort during extreme weather
• Replacing a worn actuator can reduce misrouting of air and repeat climate-related diagnostics

What to expect after installation

With correct replacement, you may experience more predictable climate behavior and fewer actuator-related service checks. This can contribute to a smoother daily drive without drastic changes to your vehicle’s electrical system.

Quality and support you can trust

Designed and tested to strict standards, this actuator resists wear and electrical burnout. The part reflects more than a century of experience and is supported by a dedicated team of U.S.-based engineers focused on dependable HVAC performance.