GMC 2005 Envoy Owner's Manual page 210

XM™ Satellite Radio Service
XM™ is a satellite radio service that is based
in the 48 contiguous United States. XM™ offers
100 coast-to-coast channels including music, news,
sports, talk, and children's programming. XM™ provides
digital quality audio and text information that includes
song title and artist name. A service fee is required
in order to receive the XM™ service. For more
information, contact XM™ at www.xmradio.com or
call 1-800-852-XMXM (9696).
Playing the Radio
PWR (Power): Press this knob to turn the system
on and off.
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VOL (Volume): Turn this knob to increase or
to decrease the volume.
DISPL (Display): When the ignition is turned off, press
this knob to display the time.
For RDS, press the DISPL knob to change what
appears on the display while using RDS. The display
options are station name, RDS station frequency, PTY,
and the name of the program (if available).
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For XM™ (if equipped), press the DISPL knob while in
XM™ mode to retrieve four different categories of
information related to the current song or channel:
Artist, Song Title, Category or PTY, Channel
Number/Channel Name.
To change the default on the display, press the DISPL
knob until you see the display you want, then press
and hold this knob for two seconds. The radio will
produce one beep and the selected display will now be
the default.
AUTO VOL (Automatic Volume): With automatic
volume, the audio system adjusts automatically to make
up for road and wind noise as you drive.
Set the volume at the desired level. Press this button
to select LOW, MEDIUM, or HIGH. AVOL will appear on
the display. Each higher setting will allow for more
volume compensation at faster vehicle speeds. Then
as you drive, automatic volume increases the volume,
as necessary, to overcome noise at any speed. The
volume level should always sound the same to you as
you drive. NONE will appear on the display if the
radio cannot determine the vehicle speed. To turn
automatic volume off, press this button until OFF
appears on the display.