A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit.
Chevy impala blend door actuator locations.
An actuator can go bad in of two ways.
First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.
The noise happens when i open the door and last for about one minute after the doors open.
Equip cars trucks suvs with 2009 chevrolet impala a c heater blend door actuator from autozone.
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