Yep, my 2018 Sierra 3500HD backup camera is awful/ dangerous at night, and just acceptable during the day. Camera flares-out with any overhead lighting and my own license-plate light at night, making it virtually unusable. Literally can't see my trailer's hitch in my driveway (fortunately bumper sensors tell me). Screen is WAY TOO BRIGHT when shifting into reverse at night (NAV screen dims just fine with dash gauges, but NOT when it switches to camera display while in reverse); blinding. I rented a POS Hyundai Elantra last week for work, and the camera was SPECTACULAR at night, highlighting how awful GM's system is in my $80K truck. An information display should not display bad information; relying on this camera is a recipe for impaling otherwise obvious stuff while in reverse at night.
Where's my trailer's tongue / giant-red-lock??! I can (and do) clean the camera every single trip, but it makes no difference. This system has no decent contrast and has terrible lighting dynamic range, like late '90s camera quality. GM continues to choose price over quality, exampled by what they've done to Cadillac... I think this is my last GM product.