Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail: GMC Sierra 2500 HD Heating & Air Conditioning

Problem overview

One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.

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Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail on GMC Sierra 2500 HD

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