I am having the same issue on my 2022 refreshed Silverado 1500. The dealership replaced the camera once and that did not resolve the issue. What is discouraging, is one of the service advisors said his does the same thing as if there was nothing wrong with it. I noticed it primarily happens at night or in parking garages where the lighting around the vehicle changes from dark to brighter and vice versa. The image is not clear like an HD screen should be at night either. In comparison, my wife's 2020 Encore GX's camera image is crystal clear and vivid where the Silverado is grainy (noisy in today's digital camera terms). Seems like some Cadillac models had a recall on this issue already. We just need to be vocal about this safety issue.