I found a used controller box and bought a new switch. I had a techakosha (spelling) p3 before the OEM one, was fine but knee always hit it. If you have the 7 inch evic, once you install the OEM trailer brake and get it flashed to your truck, the option will show on your evic. Also the 8.4 radio it will show under settings if you update the radio after install. The OEM brake also has sway control help using your abs system. Total for used control box and a new switch was like $100. Wiring is already there, basically plug and play, except the flash for your evic to see it. The screws on the controller box are very very hard to put in, I did 2 and used a zip tire the secure other. If you have AlphaObd, should be able to add it to your truck, if you don't have alpha, might be cheaper to buy it to add to truck than what dealers charge, some want over $100 just to flash.