Since I'm posting things I don't know about
: I have no idea where this picture was taken, either.
The bricks and turntable are similar to the Design Dome patio, but that would be surrounded by a wall, and would not have an open view to the rear.
There's no turntable like that at either Milford, or in Pontiac.
So maybe a non GM design facility somewhere?
K
Edit: now that I look at it, there is a somewhat distinct line at the transition from the bricks to the "dirt", like maybe they used a Design dome setting and faked/airbrushed in the background.