2 part question (vehicle integration)

I’m just wondering if this is possible at all, I am putting in a popup 9″ LCD in my Cadillac CTS. Can I read information from my cars stereo display such as EXT. temp, volume and radio stations? The display does not control anything. It’s only a small LCD. I have attached pictures so you can see what I’m talking about.

Next question, is it possible to resize the LCD from a full 9″ to a smaller size when it is not raised up? Once again, see pictures.

[Image: hLSsq5]