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.Google+
Car Problem Reports
GMC Yukon Denali Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
GMC Yukon Denali Problem
Average Mileage: 107,833 mi (57,000 mi - 150,000 mi)
Visitor, 2004 GMC Yukon Denali, 57,000 mi
HVAC is blowing air out defrost and floor. Will not switch to vents.
Visitor, 2004 GMC Yukon Denali, 110,000 mi
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.
Visitor, 2004 GMC Yukon Denali, 140,000 mi
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