I just bought a 2020 3500 with the giant screen. I hooked up my toy hauler and went to the desert. By the time I got there it was 10pm. I had to back up about 100 yards down a very skinny road/trail to get to my favorite spot in complete darkness. When I put the truck in reverse the screen went to full brightness. Pretty much exactly like having someone point a flashlight directly in your eyes while trying to back up your brand new truck and 30 foot toy hauler. I tried every thing to get it to dim with no luck. My wife had to hold up a jacket infant of the screen so I could see. I have looked all over the place trying to figure it out, Seams like others have the same problem and the only remedy is to cut the power to the cameras. This is insane. I have 4 other vehicles with back up camera and they all dim including my Jeep with U-connect. Please tell me someone has the answer.