Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail on GMC Sierra 1500

Submitted by Vehicle Owner · May 29, 2025
Published by RepairPal

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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