The Enclave owner manual tells you how to prep fr towing, e.g. fuses to pull, tranny position, etc.
You need a tow bar, base plates (connects tow bar to car), a toad brake system, and a way to connect the car stop/tail/turn lights to the coach. Lots of choices for those, and you can read numerous opinions here about the "best way". They all seem to work ok, though, so the pros and cons are a matter of personal preferences and cost vs convenience trade-offs.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL