Cadillac 2011 DTS Owner's Manual page 107

Leaving children in a vehicle with the ignition key
is dangerous for many reasons. Children or others
could be badly injured or even killed. They could
operate the power windows or other controls or
even make the vehicle move. The windows will
function with the keys in the ignition and children
could be seriously injured or killed if caught in the
path of a closing window. Do not leave the keys in
a vehicle with children.
The master key is used for the driver door, ignition, and
glove box.
The valet key is used for the driver door and ignition.
In an emergency, contact Roadside Assistance. See
Roadside Service on page 8 7.
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