I have a 2005 Silverado. It has the manual climate control (dual zone). I had both passenger and driver side set on hot. I turned them to cold and I noticed the driver side was still blowing hot air. The passenger side went to cold as it should have. I have done a lot of reading and it seems to be the blend door actuator. I turned off the truck and back on and it is working fine now. Could it be a one time error or a sign of things to come? I have the center console so I am not sure where to find this actuator. Some things I have read say it's on the driver side and some say the passenger. Should I just wait and see if it acts up again?