OEM style backup camera is great!
Initially I bought a wireless backup camera for hitching up and encountered the dreaded Bluetooth interference, since my 2012 Silverado has Bluetooth. I could muddle through the interference but looked for something better.
I finally settled on an OEM style kit with improved camera from GMbackupcams.com. The install was pretty easy resulting in a clean look, great view of the stinger and tongue, and no interference. Since I do not have factory Nav, the picture is in the rear view mirror, which I like. This is a great kit although they do not do phone tech support, only e-mail. If you consider going this route, PM me, there are some installation tips I can provide.