Cadillac 2001 Catera Owner's Manual page 24

The panel behind the rear seat armrest also folds down.
Turn the knob counterclockwise and pull the panel
forward to gain access to the trunk. When finished using
the panel, return it to its original position and turn the
knob clockwise to secure.
1-12
Heated Rear Seat (Option)
A telltale light in the button indicates the system is in
use. The heated seats can only be used when the ignition
is turned on. The heating system shuts off automatically
when the ignition is turned off.
The heated rear seat
controls are located on the
rear center console under
the air outlets. Press the
button once to turn on the
heating system. Press the
button again to turn the
system off.