I have a 2009 Silverado that I use mainly to tow my featherlite car trailer with. Truck has the all american package that included the towing package. Probably do not NEED a brake controller, but would like the added safety of one (trailer is already wired for it). What is everyone using and why are you using it? Any adapter harnesses needed from the dealer to incorporate the brake controller into the 09 Silverado system? Any issues I will run into when installing?