Third brake light rear camera
Pretty good. The video resolution is not as good as the cam on my Subaru but it's good enough.
The camera shoots right down on the trailer hitch and covers the trailer.
I replaced the rear view mirror with the monitor. This gives me full time rear view with backup lines in reverse.
The customer service in great with Rearview Safety. I ended up calling them because the installation documents were typical Chinese to English translations and incomplete. They were most helpful. I would phone them to place the order.
I'm sure you can source this gear straight outa China cheaper, but you'd be on your own if it crapped out.
If you don't know from automotive electrical installation, seek experienced help.
Good luck GH
'07 GMC 2500 6.0