The camera in my 2011 looked awesome. Crisp, clear, and focused.
It was the first vehicle I've owned with a backup camera.
The one in my 2012 is a bit blurry and washed out most if the time. Much like the contrast or brightness is set a bit too high. It looks good sometimes when the light outside is just right.
I thought about replacing it with a new OE camera off ebay for about $90, but just haven't yet.
It's been said (on here and in the owners manual) that while in reverse you can either tap the screen or press the menu button and it will bring up the contrast and brightness adjustments, but I can't get mine to do it.
2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18