RecMech

I just bought a new 2009 GMC 2500 HD Duramax SLT with Bose and want to put my old F700 or a new one in the truck. Old install was in a Ford, so I am new to GM. I checked Crutchfield for install parts and they say that the F series will not fit the GMC. Is this a clearance issue? Can it be overcome? What parts do I need? Thanks...