05 Silverado AC - wont blow out of vents
 

05 Silverado will not blow AC out of vents but it will blow out of defroster and floor vents. Any ideas??
If it means anything, i had to replace the battery in the truck yesterday, and now this. Could it be related?
Any help will be greatly appreciated. Cant really afford to put it in a shop right now.

Sounds like a bad mode door actuator. I have changed many batteries and not had one go bad. Check to make sure all connections to it are good. It is under the dash.