OEM General Motors BT VCIM #20783877 - one of the three available that would properly work in a G8 with proper reflash from WAMS and allow addition of factory Bluetooth and OnStar integration.
Removed from a 2009 Silverado. Includes BT antenna.
Tested in my car (with mute wire removed) for a few weeks. Everything worked on it. I removed to install a Costar Bluestar II that I had found on the cheap. No bent pins or any damage. Stored in bubble wrap in box inside a nice dry spare room of my house for the past few years since removal.
I did NOT get it flashed by WAMS so it still needs the G8 programming and your VIN flash - which you would have to do the flash anyway due to VIN issues.
$200 shipped. Paypal goods and services