40000 mile back up camera stopped working, manual states button on rear view mirror to turn on there is no button. headlight dim. took it to dealer for back up camera to be turned on .they gave me a 1000.00 repair estimate I called Cadillac gave me the manual instructions,(no button) I explained, again and again… They had no clue after phone and many many emails no resolve. I set factory reset nothing… thanks Danny
Sounds like the camera needs to be replaced, GM can’t do that over the phone.