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.
Car Problem Reports
GMC Yukon Denali Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
GMC Yukon Denali Problem
Average Mileage: 97,500 mi (55,000 mi - 140,000 mi)
Visitor, 2004 GMC Yukon Denali, 140,000 mi
hate this, a really annoying problem in a really expensive vehicle
electrical problems- door locks, ac/heater, lights, all going out and replace.. reapeat