 Which Actuator Do You Need?
| RECIRCULATION |
Controls the intake of air into the system, either bringing outside air in or using inside air in recirculation.
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| BLEND |
Controls the temperature of the air flowing from the vents by mixing hot and cold air from the heater core and the evaporator core.
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| MODE |
Controls which vents have air flow, i.e. Floor, Panel or Front, Defrost, or any combination of those.
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Diagram:
Main vs. Auxiliary
The term "Main" refers to the air flow control of the Front Vents. The term "Auxiliary" refers to the air flow control of the Rear Vents.
Many actuators that control the air flow to the rear vents are still located in the front of the vehicle. Some larger and/or higher end vehicles may have Auxiliary air door actuators in the center console or in the rear of the vehicle.
ACDelco Quality ACDelco breaks down their premium portfolio of Original Equipment and Aftermarket parts into two tiers: GM Original Equipment and ACDelco Gold.
| GM ORIGINAL EQUIPMENT |
| GM Original Equipment parts are the true OE parts installed during production or validated by GM—designed, engineered, and tested to rigorous standards and backed by General Motors. |
| ACDELCO GOLD (PROFESSIONAL) |
| ACDelco Gold parts are the high-quality alternative to OE parts, manufactured to meet GM expectations for fit, form, and function and backed by General Motors. |
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| OEM / Interchange Numbers: 52487593 |
