Awesome, mystery solved! I still have a bunch of "stuff" in the glove box, so maybe it's in there. I'll take a look. Thanks!

I've had a 2004 Vibe for a month now -- it's great! While talking to another Vibe owner last night, the question came up about the small, round, "button" or "switch" that sits just to the right of the transmission shift lever. It's round and looks like it has four notches in it. ...