Hi, I'm Mark. I'm in the process of buying my late Father in Law's 2006 Titan King cab. It has the towing package. Does it still need the additional brake controller? I've towed my 4000lb. travel trailer with my Frontier Crew cab and had the controller installed in it a few years back. Since the Titan had the factory towing package, I didn't know if I needed the controller or not. Thanks!