IF you haven't begun installing the radio head unit, yet can I make a suggestion if not too late?
The name brand units are not what we want in a head unit. They care way too much about markup and also laws of the land to produce a good product by any end user's standards. For the money.
Of the whitebox head units that are completely unlocked android head units JOYING makes the best, or always seems to have the best specs anyways. And the specs on these head units are pretty outstanding by Pioneer's or Alpine's or Sony's standards. To get these specs from them would likely cost you $5-8k. No joke. Markup like that over a name, profit, and cost of manufacture. Do you enjoy looking at a nameplate or taking in playing media whilst you drive?
JOYING has head units with by far the best specs. If you want over the top here is a 13" screen that will fit your double din enclosure..
Joying Newest Released 13.3 Inch Double Din Universal Car Stereo With Automatic Rotatable (joyingauto.com)
They will let you mount the screen however you want, you can even stand it up on its side if you like. While the 13" might block your A/C vent or control I have made a 9" fit well in a C6 and left to feel like a 10" would have fit well. This is the 9" i have successfully installed in C6 with easy fitment..
Joying Newest 9”Universal Single Din Car Music Stereo With 1280*800 Ultra-Screen (joyingauto.com)
I got the sigle din model because it seemed to have a trim with the highest specs. The install comes out like this before we put the screen on..
The head unit should go in with a canbus decoder/radio interface module that will both communicate with the factory amp and also keep your retained accessory power(RAP) like the PAC RP5-GM11T. I do not have any pictures of this module but it all gets stuffed behind the radio and makes for a very friendly integration to the car. With this hardware you even get to keep your steering wheel controls.
Once everything is mounted there are all these screw holes on the backside of the screen to mount the 4 tabs that hold the display to the head unit. This allows us to mount the screen up, down, off to one side or another, or turn it up on its side so we can clear the a/c vents or control head. We first mounted an 8" and here is a few pictures of that..
It is a very thin screen and it doesn't stick out far past the dash. But the little it does come out makes it less you have to reach to operate that huge touchscreen. This is what it looks like from outside the car..
This C6 now has the head unit in the last link above. The 9" and it fits and still has a bit of room on top and bottom. I had a 10.1" in my C5 and it was glorious. Aside from watching music videos and news and movies and whatnot whilst on the road this head unit also empowered me to add any gauge my heart desired through an OBD2 interface device and the Torque Pro app. The most brutally accurate gauges you will ever get. Direct from the engine controller's PID list..
IF you are looking at a 'quality name brand' in your car audio you will never get to do anything but listen to music with it. And today we can do so much more. If you buy a new vehicle it will do so much more. Your vette could be so much more. I mean please, for your consideration..
These head units even come with sim sockets so we can get a sim card and just get 4g right to our car like it was a C7 or C8. But we can goto metroPCS or somewhere where we can get the cheap cheap service and just always be riding around with a second lifeline back to the world. It also streamlines everything when we don't have to wait for the head unit to connect to our phone's wifi hotspot.