Trailbreaker

I have a 2022 Yukon Denali with 300km, with the same problem. The back up camera is intermittent, and today got the warning person behind triangle while backing into my garage with no moving objects or people behind. The camera button to the left of the steering wheel only brings the camera on screen some of the time, and the button on the screen for the camera does nothing when the camera is not coming on. I haven’t taken it yet.