To add, you can disable the AFS system by the switch, especially if you have no issues with your headlights currently.
Type AFS or something similar in the search bar to see what others have done about it. I know someone was lowered and the system ended up correcting his/her headlights into the sky.
Then, most issues have been a humming or motor sound when the swivel actuators go bad, so most just deactivate the system and have it as a conventional headlamp system.
Edit: here's the link.
post6475348.html?hilit=Galaxies#p6475348