Cadillac 2010 Escalade Owner's Manual page 363

If viewing a map screen, touch the source screen
(AM, FM, XM, CD, etc.) button. The display splits
between the audio screen and the map screen. All
station-changing functions can be performed from this
screen.
If you do not want to view a split screen or you are not
on a map screen, press the AUDIO hard key.
Touch the source (AM, FM, or XM,
if equipped) screen button or press the AUDIO key
repeatedly until the desired source is highlighted.
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