Buick 2011 Lucerne Owner's Manual page 221

To minimize taking your eyes off the road while driving,
do the following while the vehicle is parked:
Become familiar with the operation and controls of
the audio system.
Set up the tone, speaker adjustments, and preset
radio stations.
For more information, see Defensive Driving on
page 5 2.
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 19 for more information.
To set the time and date:
1. Turn the ignition key to ACC/ACCESSORY or ON/
RUN. Press to turn the radio on.
2. Press and the HR, MIN, MM, DD, YYYY (hour,
minute, month, day, and year) displays.
3. Press the softkey located below any one of the
tabs that you want to change.
4. To increase the time or date do one of the
following:
Press the softkey located below the
selected tab.
Press SEEK, or
Turn clockwise.
5. To decrease the time or date do one of the
following:
Press SEEK or
Turn counterclockwise.
FWD.
REV.
4-65