Playing The Radio - Chevrolet 2004 Impala Owner's Manual

Playing the Radio

PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn this knob to increase or to
decrease volume.
AUTO VOL (Automatic Volume): With automatic
volume, your 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. If you do not
want to use automatic volume, select OFF.
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DISPL (Display): For RDS, press this 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).
For XM™ (48 contiguous US states, 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 hold
the knob for two seconds. The radio will produce one
beep and the selected display will now be the default.