C 1500 Yukon 2WD V8-4.8L VIN V (2000)
Air Door Actuator / Motor: Description and Operation
Actuator Description
The following six actuators control the automatic climate control system:
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The air temperature valve sensor and motor
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The vacuum inlet door actuator
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Four vacuum mode door actuators
When servicing an actuator, replace pants with the correct service pants for the actuator being serviced.
The air temperature valve sensor and motor contains a feedback potentiometer. The feedback potentiometer reports the position of the air temperature
valve sensor and motor to the Electronic Climate Control (ECC) module. If the air temperature valve sensor and motor has been removed or replaced for
service the actuator must be initialized. Perform the following procedure in order to initialize the actuator:
1. Turn the ignition switch to the OFF position.
2. Remove the RADIO fuse for 10 seconds.
3. Reinstall the RADIO fuse.
4. Turn the ignition switch to the ON position.
5. Ensure that the air temperature valve sensor and motor cycles through the hot and cold range.
