You can also buy the trailer brake controller kit, comes complete with the controller, 3 additional screws to mount it and 2 different coloured bezels (black and tan) for whichever interior dash colour you have as well as full instructions. I found it for $188 on ebay (Quirk Parts out of MA). Part # 82212548
The dealership up here near me in the Great White North wanted to charge me, with install, more than $400 with tax. I bought the Quirk part instead, installed it in about 15 minutes and it works. It isn't flashed but depending on dealership charges for this, I might not bother with it (although I have MOPAR fog lights I need to get flashed, so might as well kill 2 birds with one visit).