2005 GMC Yukon XL Denali Q&A
2005 GMC Yukon XL Denali Question: Rear ac not blowing
Check the pressures with a gauge set, if the system is a bit low, it will only cool the front 1/2 of the vehicle. - dandd
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...