I have a 2010 Suburban with the dual zone climate control. Lately since the temperature started to change I notice that sometimes the blower sound will be very loud near the passenger side air bag and outside at the cowl. It also seems to blow less strong at the vents when this happens. I typically operate it in the manual mode without the passenger control on. Basically I will be driving and everything is operating normal and then I notice it getting louder inside and less air coming out of the vents. Sometimes I can adjust the temperature and it goes back to normal. I tried resetting it by pulling the fuse and that helps, but eventually it goes back to the same problem. I operated it this morning to test the operation of the temperature and passenger controls and that seems to operate normally. Its kinda random but I think it has to do with the temperature. I see that there are issues with the actuators but not sure how to figure out which one it would be. Any help would be appreciated.