Chevrolet Silverado Classic 2007 Owner's Manual page 349

If your vehicle does not have OnStar, press this
button to silence the system. Press it again, or any
other radio button, to turn on the sound.
PROG (Program): Press this button to play a
station you have programmed on the radio preset
pushbuttons. The radio will only seek preset
stations with a strong signal that are in the
selected band.
When a cassette tape is playing, press this button
to play the other side of the tape.
When a CD is playing in the CD changer, press
this button to go to the next available CD, if
multiple CDs are loaded.
Q R
SOURCE : Press this button to switch
between FM1, FM2, AM, or XM1 or XM2
(if equipped), or a cassette tape or CD.
The cassette or CD must be loaded to play.
Available loaded sources are shown on the
display as a tape or a CD symbol.
Q R
SEEK : Press the up or the down arrow to
go to the next or to the previous radio station
and stay there. The radio will only seek stations
with a strong signal that are in the selected band.
When a cassette tape or CD is playing, press
the up or the down arrow to fast forward or
reverse.
Q R
VOL (Volume): Press the up or the down
arrow to increase or to decrease the volume.
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