Cadillac 2008 DTS - Manual (Page 88)

Rear Seat Pass-Through
Your vehicle has a small door in the rear seat.
This door allows you to access the trunk from
inside the vehicle.
The rear seat armrest must be down for the
pass-through door to open. To release the pass-through
door, move the release up with your fingers. To close the
door, raise it and push it until it latches.
Windows
{ CAUTION:
Leaving children, helpless adults, or pets in a
vehicle with the windows closed is dangerous.
They can be overcome by the extreme heat
and suffer permanent injuries or even death
from heat stroke. Never leave a child, a
helpless adult, or a pet alone in a vehicle,
especially with the windows closed in warm
or hot weather.
2-14