Tow package usually just mean stronger axels and brakes, reinforced rear, factor mounted hitch and a *4* pin wiring setup.
The only truck of that I know that has a built in break controller is the 2012 Dodge Ram 3500 Dually And even then it was an option and not standard.
When you get the break controller installed they will also run the 7 pin wiring harness. Make sure to specify that you want all 7 pins working, as some times on older truck they can only run 6; which mean the interior trailer lights won't work. It's a misnomer b/c the 6 & 7 pin harness are actually the the same harness, but if they don't run the optional 7th, no inside lights.
ALSO make sure to have them verify your battery has enough capacity for the truck and the trailer. Nothing worse than driving to a show and then stopping for gas or a break and the truck goes dead because the battery was drained from overuse. It happened to me last summer 200 miles from home an hour before the nearest auto supply store closed. Just b/c the battery supports the truck fine DOES NOT mean it will run the truck and trailer.
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