i have a 2003 gmc yukon with dual climate control the problem that i have is that the driver side temperature blows cold to what ever climate i put it on but the passenger side continues to blow heat no matter how high or low i change the temperature  

hi this may help or not gm has some bugs in diffrent areas 1 is the hot/cold vent issue most of the time if you turn of the vechice and restart it will fix the problem  my resister and motor went out not long after that.it will do it serval times then it won't do again.2 some times the dash will pop up service brake booster but that is a bug too.it will come and go. hop this helps.