I don't have any tear down photos of the H2 like I do with the Tahoe.
The factory radio is a Din and a half or double. MnM removed the gear shifter, console, etc. The factory radio was placed inside the console. With the cosole removed it almost looks like its sitting on the carpet.
Man there is some serious room in there.

However the Onstar buttons are still located in the factory spot below the AC controls.
Hope that gives you an idea.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Humm This:
Can you show me a pic of how you had that done? My OnStar was relocated so it sits nexts to your legs (drivers side) </div></BLOCKQUOTE>