GMC Envoy has it as well, just rode by one that has it halfway down.
Only the version that has the mechanical nightmare bullsh*t rear end.
The one that has roof leaks like no other and constantly breaks, which eventually led to it's end, much like the rest of GM's lineup.
A brief list of GM cars that were terminated within recent times (including but not limited to):
Cadillac DTS
Cadillac STS-V
Cadillac XLR
Cadillac XLR-V
Chevrolet Cobalt Sedan SS
Chevrolet HHR SS Panel Van
Chevrolet Impala SS
Chevrolet Malibu Hybrid
Chevrolet Trailblazer
GMC Envoy
All Hummers:
HUMMER H2
HUMMER H2 SUT
HUMMER H3
HUMMER H3T
Every single Oldsmobile
Every single Pontiac, including:
Pontiac G5
Pontiac G6
Pontiac G8
Pontiac Solstice
Pontiac Torrent
Pontiac Vibe
All Saab models, sold back to the Swedish.
Every single Saturn, including:
Saturn Astra
Saturn Aura
Saturn Aura Hybrid
Saturn Outlook
Saturn Sky
Saturn Vue
Saturn Vue Hybrid
1,200 terminated dealers, too.
So, rear roll down window is cool, but I think it's only cool in a car that works.