I had the same noise on my 07. It was coming from the rear AC center console. I pulled out the front of the entire unit, easy, just yank the whole thing out and unplug the 2-3 cables, inside there was a flap/door moving up and down making that noise. The door redirects the flow of air. I ended up pushing it till it broke. Unfortunately, the sound is still there, the servo motor still clicks trying to open and close the flap, i wish I could just unplug the motor, but it's all out of reach....no fix. Hope you find a solution.