GMC Sierra 3500 Problem Report

GMC Sierra 3500 Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator

(6 reports)

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.

duel zone AC, one zone will work correctly and the other will blow hot air -
Temperature is stuck below 0 degrees and I cant switch on my A/C in summer! -
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