Dorman HVAC Blend Door Actuator 604-315 — Direct-Fit for Buick/Cadillac/Chevrolet, Durable Motor & Connector

The Dorman 604-315 HVAC blend door actuator is a direct-fit replacement actuator designed to restore proper temperature and air-direction control in compatible Buick, Cadillac and Chevrolet vehicles.

If your vehicle’s HVAC system is failing to blend hot and cold air or won’t switch airflow between vents, a malfunctioning blend door actuator is often the cause. The Dorman 604-315 is engineered to match the original unit’s mounting and electrical interface for specific model years and configurations, offering a straightforward repair when you confirm correct application for your vehicle.

How do I know this actuator fits my car?

Not all blend door actuators are interchangeable—many vehicles use several position-specific actuators. Verify fitment by checking the part’s application notes for make, model, year and trim, or use your dealer/garage tool to enter vehicle details before ordering.

• Compatible with select Buick, Cadillac and Chevrolet models from 2010–2016 (see application list)
• Designed to match the original mounting points and electrical connector
• Confirm position/function—blend door vs. mode/recirculation—before replacing
• When unsure, consult a qualified service technician for identification

What performance and durability can I expect from the Dorman 604-315?

This actuator is built to meet demanding standards for mechanical and electrical reliability. It undergoes testing to help resist common failure modes like motor burnout and gear wear, delivering longer service life than worn original parts.

• Durable components to resist wear from repeated cycling
• Electrical design aimed at preventing premature burnout
• Quality control backed by experienced engineers in the United States
• Intended for routine HVAC actuation loads, not for non-standard modifications

How difficult is installation and what should I prepare for?

Installation difficulty varies by vehicle and actuator location; some replacements are accessible from under the dash while others require removing trim panels. Because this is a direct replacement with matching electrical connector and mounting points, many technicians and experienced DIYers can complete the swap without modifying the HVAC system.

• Gather basic hand tools and follow vehicle-specific service instructions
• Disconnect battery power before handling electrical connectors
• Recalibration or relearning procedures may be required on some vehicle systems
• If access is limited, professional installation is recommended

Which vehicles commonly use this Dorman part?

The 604-315 actuator fits particular trims and years—always verify fitment for your exact vehicle. Common compatible vehicles include several Buick sedans, Cadillac SRX crossovers and Chevrolet Camaros from 2010 through 2016, but application depends on the actuator’s position and HVAC configuration.

• Buick LaCrosse (2010–2013), Allure (2010), Regal (2011–2012), Verano (2012)
• Cadillac SRX (2010–2016)
• Chevrolet Camaro (2010–2015)
• Use the garage/fitment tool to confirm trim-specific compatibility

Who is this for: The Dorman 604-315 is intended for vehicle owners and technicians who need a position-specific HVAC blend door actuator replacement for compatible Buick, Cadillac and Chevrolet models. Choose this part if you want a direct-fit unit engineered to match original mounting and connectors, prioritize durability, and have confirmed the correct actuator location and function for your vehicle. If you are unsure which HVAC actuator you need, consult the vehicle’s repair manual or a professional mechanic before purchasing.