GMC Sierra Classic 2007 Owner's Manual page 295

To adjust the balance or fade to the middle
position, while it is displayed, push the AUDIO
knob, then push it again and hold it until the radio
produces one beep. The balance or fade adjusts
to the middle position and the display shows
the speaker balance.
To adjust all tone and speaker controls to the
middle position, push and hold the AUDIO knob
when no tone or speaker control is displayed. ALL
CENTERED appears on the display, you will
hear a beep, and the display level adjusts to the
middle position.
Finding a Program Type (PTY) Station
(RDS and XM™)
To select and find a desired PTY perform
the following:
1. Press the TYPE button to activate program
type select mode. TYPE and a PTY appears
on the display.
2. Turn the TYPE knob or press and release the
TYPE button to select a PTY.
3. Once the desired PTY is displayed, press and
release either the TYPE or the SEEK arrows to
select and to take you to the PTY's first station.
4. To go to another station within that PTY and
the PTY is displayed, press either the TYPE
or the SEEK arrows once. If the PTY is
not displayed, go back to Step 1.
5. Press either the TYPE or the SEEK arrows to
exit program type select mode.
If the radio cannot find the desired program type,
NONE appears on the display and the radio
returns to the last station you were listening to.
SCAN: Scan the stations within a PTY by
performing the following:
1. Press the TYPE button to activate program
type select mode. TYPE and the last selected
PTY appears on the display.
2. Turn the TYPE knob or press and release the
TYPE button to select a PTY.
3. Once the desired PTY is displayed, press and
hold either the TYPE or the SCAN arrows for
two seconds, and the radio begins scanning
the stations in the PTY.
4. Press either the TYPE or the SCAN arrows to
stop at a station.
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