Re: Trailer brake wiring
The wiring should be in place. You can go to the dealer and get the factory 7 way that will plug into the wiring at the rear of the truck. There should also be wiring in the dash or under the hood for the brake controller. You can buy brake controllers that will plug into the existing harness. And you may or should already have the wiring harness for the brake controller. Should be in a little pack that came with the truck.
I love it when people do things right
Unfortunetly I dont always do that lol