Is it possible to transform an Avalanche into a Suburban?

After looking at this: 

, I realized the Avalanche shares alot of similarities to the Suburban. Because I want this for a Blender animation I'm making: a Chevy Suburban that resembles one of the Dreads from Transformers 3 - but with my aesthetics in my place. 

That Avalanche model from the DL link already has the correct wheel height like the Dreads' chassis depicted here; so that's that part already complete (I don't really care about the wheel rims). It also has searchlights by the mirrors and a full push bar that protects the headlights and front grill, so I can check that off too. Once I get more experienced with Blender, all I have to do is extrude the back of the Avalanche's frame to cover it's flatbed, design a trunk door that opens up and closes down, add a seat row for up to 3 in the back, make the "SUBURBAN" badge for the trunk and front side doors, mirror strobe lights, and a hood vent like the Dreads' hoods depicted.