Well, I was able to use the factory GPS with the Maestro NAV1, but finding the right connection of the factory Microphone, was a dead end. I just couldn't find how it connected to the factory 8.4 Uconnect radio to splice it into the Halo9. I'll keep investigating, but for the time being I just placed the Alpine Mic on the top cubby.
The Halo9 is a really good unit, with tons of customizations. I like the fact that I don't need to drill holes for accessories that require switches (i.e. winch, light bars, etc) as I can control them from the stereo via a connector that Alpine makes. The screen quality isn't bad, as others have mentioned, and I can't see pixelation. As a matter of fact, after I installed it, I realized who crappy the output on the stock rear camera is. Installation is a bit difficult, mostly due to the amount of cables that require fiddling the radio into place; so have patience.
The only issue that I have found thus far is that when using carplay, the screen is too bright, making it difficult to see google maps, waze, or apple maps. Outside carplay the brightness is fine. It might be something with the settings, but there are too many menus that I haven't had time to play with them yet.
Anyhow, here are the images of the unit, and the usb/hdmi connection. Hope this helps anyone with trying to decide which aftermarket radio to buy in the future.
Good luck!
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