I am guilty of not reading the manual or having the salesman tell me all the features of the truck. The first time I put in my weight distribution hitch and tried to back up to the trailer the auto brake kicked in several times and I looked like an idiot to the trailer sales team. And I was several feet away. I told them I had no idea what the truck was doing and I was not hitting the brake that hard or at all. I reached down and clicked off the sensors then poof, it would not brake anymore. so I dug and found the setting and turned it off. Now when I back up to the trailer the sensor is beeping but when I plug in the trailer cord it automatically turns off the sensor, I dont have the blindspot feature. But the 4 pin on the smaller trailer beeps so the 7 pin will disable and turn on my trailer trip computer but not the 4 pin.