I currently don't have any 2007/8 Chevy photos in my gallery, as no one has sent me any. The fact is, body style doesn't have much to do with installing radios, other than finding room for them.
If there are any problems, they deal more with SRS devices, and other safety related items. As a result, I suggest you spend some hard earned cash on a body repair manual, and an electrical trouble shooting manual. They're not cheap, but trust me, they pay for themselves post haste.