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

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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Average mileage : 120,571 (55,000–230,000)
4 Years Affected: 1999, 2000, 2004, 2005
10 people reported this problem
4 people shared problem details
2005 GMC Yukon Denali110,000
only can get fresh air, due to actuator not working
My heater cools when I want heat and my A/C heats when I want cooling. I have had the motor doors replaced once before at 77,000. It not is occurring again.
2004 GMC Yukon Denali140,000
hate this, a really annoying problem in a really expensive vehicle
electrical problems- door locks, ac/heater, lights, all going out and replace.. reapeat
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