This kit includes all parts needed to add Heads Up Display (HUD) to your C6 that wasn't originally equipt with it. This kit includes:
You can use your stock windshield, it doesn't have to be replaced for you to be able to see the reflection.
The Display, switch and bezel are oem GM parts, just as would be from the factory. The harness is a custom wiring harness that we have an outside firm manufacturing for us. The instructions are not full of technical jargon, this is a write up done by a fellow car guy that is publicly available on different forums.