GMC 2013 Sierra Owner's Manual page 138

5-8 Instruments and Controls
Turn the knob clockwise.
5. To decrease the time or date, do
one of the following:
Press the SEEK button.
s
Press the REV button.
Turn the knob
counterclockwise.
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 the button and then the
softkey located below the
forward arrow tab. 12H, 24H, the
date MM/DD (month and day),
and DD/MM (day and month)
displays.
2. Press the softkey located below
the desired option.
3. Press the button again to
apply the desired option, or let
the screen time out.
MP3 Radio with a Six-Disc CD
Player
To set the time and date:
1. Turn the ignition key to ACC/
ACCESSORY or ON/RUN, then
O
press the button to turn the
radio on.
2. Press the MENU button and
then the softkey under the
to display HR, MIN, MM, DD,
YYYY (hour, minute, month, day,
and year).
3. Press the softkey located under
any one of the tabs to change
that setting.
4. To increase the time or date, do
one of the following:
Press the softkey below the
selected tab.
Press the SEEK button.
\
Press the FWD button.
Turn the knob clockwise.
I n f o r ma t i o n P r o v i d e d b y :
5. To decrease the time or date, do
one of the following:
Press the
Press the
Turn the
counterclockwise.
To change the time default setting
from 12 hour to 24 hour or to change
tab
the date default setting from month/
day to day/month:
1. Press the MENU button and
then the softkey under the
tab.
2. Press the softkey located below
the forward arrow tab. 12H, 24H,
the date MM/DD (month and
day), and DD/MM (day and
month) displays.
3. Press the softkey located below
the desired option.
4. Press the MENU button again to
apply the desired option, or let
the screen time out.
SEEK button.
s
REV button.
knob