GMC 2010 Sierra - Manual (Page 310)

Setting the Clock
AM-FM Radio
To set the time:
1. Turn the ignition key to ACC/ACCESSORY or
ON/RUN, then press the
O
button to turn the
radio on.
2. Press the
H
button until the hour numbers begin to
flash, then turn the
f
knob to increase or decrease
the hour.
3. Press the
H
button until the minute numbers begin
to flash, then turn the
f
knob to increase or
decrease the minutes.
4. Press the
H
button until the 12HR or 24HR time
format begins to flash, then turn the
f
knob to
change the time format.
5. Press the
H
button again until the clock display
stops flashing to set the currently displayed time,
or wait until the flashing stops after five seconds
and the current time displayed automatically sets.
MP3 Radios with a Single CD or a
Single CD and DVD Player
To set the time and date:
1. Turn the ignition key to ACC/ACCESSORY or ON/
RUN, then press the
O
button to turn the radio on.
2. Press the
H
button 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
f
knob clockwise.
5. To decrease the time or date, do one of the
following:
. Press the
©
SEEK button.
. Press the s REV button.
. Turn the
f
knob counterclockwise.
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