GMC Yukon Denali Problem Report

GMC Yukon Denali Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator

(18 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.

Ac on drivers side gets hot air while passenger side gets cooled air. If turn car off & restart it some times works normal -
HVAC is blowing air out defrost and floor. Will not switch to vents. -
While the A/C is turned on MAX and the temp is 60 degrees, the vents will go from blowing ice cold air to blowing hot air. -
blower motor for fronton and off some times and temp switches from hot to cold -
while driving the air automatically goes from AC to hot air. goes back to normal only after i shut car off and turn back on. -
Ac and heater blow on defrost and floor but not front. When I push the button to switch from floor, to face, to floor the air does not come out at the face it blows harder at the feet? When the arrow shows that it should be blowing at the face it is just blowing at the floor. I can switch between floor and defrost but not to front/face? This is with the heat or ac on. -
This is terrible. Dead of summer, and the a/c turns to blazing hot heat... I followed a reset process researched online involving the removal and reset of the AC fuses, and setting cycles. still not exactly right -
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