I think they all have vents in the rear, mine actually has a 2nd evaporator and a 2nd set of controls mount in the roof for the a/c that runs independent from the front seats.

 

My SD does not have rear air.

 

They def don't all have vents in the rear. Sounds like an SE that was ordered with rear air. I'd keep those last two ceiling vents closed, unless you have canine passengers in the loadspace!

 

And then you have the G4 Edition like mine which has a mix of stuff from the high and low range...

Automatic dual climate control
A-frame grill guard with off road lights
Style 3 16" wheels
Heated seats and windshield
Single disk stereo
Black mogul (vinyl) interior
Ladder
Lamp guards
Tangiers Orange (of course)

 

It seems to me, that there are even more models that aren't listed here. All of the trucks have personality and character.

@Jordan- I'm potentially interested in those wheels one day, and want out of my 18" Hurricanes.... so.... just sayin'.