Got my Prodigy P2 brake controller at www.etrailer.com
for my 2013 Ram Express. At etrailer, I was also able to purchase a pigtail which connects the brake controller to the trucks factory wiring connection. With the pigtail, it's all plug and play - no wiring connections to mess with. Search for the pigtail specific to your truck year. The Prodigy P2 works great. Don't think you could go wrong with it.