Cadillac STS 2011 Owner's Manual page 123

Trunk Lid Release
There are three ways to open the trunk lid.
(Trunk Lid Release): Press this button located
on the driver's door. The vehicle must be in
P (Park) or N (Neutral) and the valet mode turned
off. To disable valet mode, see Valet Lockout
Switch on page 3 24.
Press the trunk lid release button on the keyless
access transmitter. See Keyless Access System
Operation on page 3 5. The vehicle must be in
P (Park) or N (Neutral) and the valet mode
turned off.
3-16
Squeeze the trunk release button located on the
rear of the trunk lid above the license plate. If the
vehicle is locked, the keyless access transmitter
must be within three feet (one meter) of the trunk
opening for it to be recognized and allow the trunk
to open. The vehicle must be in P (Park) and the
valet mode turned off.
If your vehicle has lost battery power, you can still
access the trunk by unlocking and lowering the rear
seat pass through door and pulling the emergency trunk
release handle.