Just took the plunge on buying a new truck, and I have figured out that my harness out of my 04 will not work with this new truck.
Has anyone done the avic-d3 on this vehicle yet? Things I need to find are...
Dash Kit: Brand, model number, price etc
Location of the factory xm antenna wire
Location of the steering wheel controls wire.
Best Harness to use to retain my onstar / Bose
If anyone can chime in that would be great! 
bump
I have the harness you need forsale on Ebay right now, I also have the dash kit.
Search my posts. I have some detail on my install. I have a 1/2 tonne 2007 nbs. Don't hold me too it but I'm guessing they will not be a whole lot different.
The steering wheel wire will be right there when you take out the stock.
Read the PAC SWIPS instructions carefully and you'll have no problem there.
I have the details of my interface but double check to ensure they work with both. My Onstar works fine. Came with the chime module so all that annoying s**t still dings away.
Metra for dash kit. It comes closest to color match. Some small gaps in the top left of mine but overall pretty good integration.