Without seeing a picture of your power mirror control panel, every one I have seen including the one in our 2007 model year, the rocker switch you describe, is for heating the mirrors for when ice forms on them. Make sure the switch is turned "OFF" unless you are de-icing.
This is something everyone should check....
With your engine off and ignition key in-hand, test to determine if your power mirrors still operate. If they do, then you want to MAKE SURE your heated mirror switch is in the "OFF" position, or your chassis battery will drain much more quickly.