GMC 2009 Acadia - Manual (Page 199)

5. To decrease the time or date,
do one of the following:
• Press © SEEK.
• Press s REV.
• Turn f counter-clockwise.
To change the time default setting
from 12 hour to 24 hour or to change
the date default setting from month/
day/year to day/month/year:
1. Press
G
and then the
pushbutton located under the
forward arrow that displays on
the radio screen until the time
12H (hour) and 24H (hour), and
the date MM/DD (month and day)
and DD/MM (day and month)
displays.
2. Press the pushbutton located
under the desired option.
3. Press
G
again to apply the
selected default, or let the screen
time out.
Radio(s)
Radio with CD
Instrument Panel 3-77