2015 GMC Sierra 1500 blows heat in one side

gmc
sierra1500

#1

My GMC blows cold air from driver and center vents when the setting is on heat. the right vent blows heat… what does this mean .


#2

If this is a new problem, generally it is the fault of one of the actuators in your HVAC system. There probably is a YouTube video on steps to repair/replace the mechanism.