Dear all, my Trailblazer 2006 LS throwing hot air from driver side as well as from rear vents also but on other hand the passenger side vents are working good. Also have very less air via driver and rear side. Moreover the position of air throwing is not as per selector switch, means if I select only foot side or under the dash then its not throwing the air under dash or at feet side and air comes thru the wind screen's vents. This all happened once the battery was dead and I try to start vehicle many times and now I noticed this problem. Its seems like the actuator need to calibrate. Could any body help on this.