The same thing just happened to one of mine the other day. The dealership replaced it, and the new one does have the clear lens where the other one has an amber lens. It is definitely noticeable standing in front of the car that the two headlights are different. The service manager is supposed to be calling me back tomorrow. I told them that I don't like having a relatively new car looking like it's been cobbed together with a bunch of mismatched parts already. I have no idea why gm would change the color of that lens. It basically makes it so that you have to replace your headlights in pairs if you have the older amber style lenses, even if only one needs replaced.