Can someone tell me what I need to install a 900BT unit inside a Chevy Tahoe 2007?

Since the deck is double din, do I still need a double din dash kit?

Go to www.MetraOnline.com, and fill the info out for your vehicle. Harnesses - Into car will tell you the wiring harness you need and Kits will show you the dash kit you will need. Hope that Helps!