Cadillac 2007 CTS Owner's Manual page 113

Key In the Ignition
Never leave your vehicle with the keys inside, as it
is an easy target for joy riders or thieves. If you
leave the key in the ignition and park your vehicle,
a chime will sound, when you open the driver's
door. Always remember to remove the key
from the ignition and take it with you. This will lock
the ignition and transmission. Also, always
remember to lock the doors.
The battery could be drained if you leave the key
in the ignition while your vehicle is parked.
You may not be able to start your vehicle after it
has been parked for an extended period of time.
Key Release Button (Manual
Transmission)
To remove the key, do the following:
1. Turn the key to ACCESSORY.
2. Press and release the button and then turn
the key to OFF.
Do not hold the button in while turning the key
to OFF.
3. Pull the key straight out of the ignition switch.
The key cannot be
removed from the
ignition of a manual
transmission vehicle,
unless the key release
button is used.
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