GMC Yukon Problem Report

GMC Yukon 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.

turn on the heat and it gets hot for awhile then turns cool...it still comes out all the vents when you hit the controls..put in a new theromsat -
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