Cadillac 2011 DTS Owner's Manual page 249

The vehicle has Retained Accessory Power (RAP). With
RAP, the audio system can be played even after the
ignition is turned off. See Retained Accessory Power
(RAP) on page 3 24 for more information.
The vehicle has an analog clock as well as the digital
radio clock. At the time of new vehicle delivery, the
digital radio clock display should be disabled. If you
decide to use the digital radio clock as well as the
analog clock, you can change the setting to enable the
radio clock display.
To turn the radio clock display on or off:
1. Turn the radio on.
2. Press the button until the clock and date setting
menus appear.
3. Press the pushbutton located under the forward
arrow tab until the menu for default clock and date
settings appear.
4. Press the pushbutton located under the currently
displayed status of either ON or OFF. The ON
display indicates the radio clock display is disabled
and the OFF display indicates the radio clock
display is enabled. Press this pushbutton to toggle
the radio clock display on or off.
If the radio clock display is turned on, the screen
displays Radio Clock ON for 10 seconds, then
returns to the original clock display menu.
If the radio clock display is turned off, the screen
displays Radio Clock OFF for 10 seconds. The
menus for clock and date settings are removed,
and ON displays as a current status indicating that
the clock display can be turned on, if desired.
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