I had to install and wire one up from scratch on my 2004 Chevy. I don't know if the newer models pre-wire a set-up like on the pick-up trucks. I'd check the chassis owners manual for that. If so, when you order your controller, order the matching wiring harness that will just plug into the controller and the van. If not, you're going to have to do your own install. I used a kit from etrailer.com. Good luck!
2005 22' BT Cruiser 5211, Chevrolet 3500 chassis w/6.0L Vortec V-8; 6'x12' Cargo Trailer; Honda CB500X motorcycle for street and ADV riding; Yamaha TW200 motorcycle for dual-sport and trail riding...All of it for fun and adventure!