Well ,since this thread is going all over the place, I'm gonna steer it back to the beginning. Why does buick have it and not our Caddy? Well, this is more history that anything really causing this. However, back in the 50's, 60's, and so on GM used to put all of the gadgets on Olsmobiles the first year they were introduced. This way they could work the bugs out and the following year you would always see them on the Cadillacs. Someone older than I am may correct some of these items but I believe the examples I remember are things like new transmisions, automatic climate control,cruise control, antilock brakes, Anyhow the point point is that there no longer is Oldsmobile, so maybe GM thinks of Buick as the "new Olds." Probably not the case, but it cant hurt this thread.