Chevrolet 2003 Silverado 1500 Pickup Owner's Manual page 227

This system relies upon receiving specific information
from these stations and will only work when the
information is available. In rare cases, a radio station
may broadcast incorrect information that will cause
the radio features to work improperly. If this happens,
contact the radio station.
While you are tuned to an RDS station, the station
name or the call letters will appear on the display instead
of the frequency. RDS stations may also provide the
time of day, a program type (PTY) for current
programming and the name of the program being
broadcast.
XMTM Radio Satellite Service (USA Only): XMTM is a
continental U.S. based satellite radio service that
offers 100 coast to coast channels including music,
news, sports, talk and children's programming. XMTM
provides digital quality audio and text information,
including song title and artist name. A service fee is
required in order to receive the XMTM service. For more
information, contact XMTM at www.xmradio.com or
call 1 -800-852-XMXM (9696).
Digital Audio Broadcast (DAB) (Canada Only): DAB
is a Canadian land-based radio service that offers digital
quality audio and text information including song title,
artist name, traffic, weather, emergency announcements
and more. Digital Audio Broadcast transmission services
are currently available in Toronto, Montreal, Vancouver,
Ottawa, and Windsor. In fringe areas signals may be
interrupted by buildings, trees and other obstructions.
Additional services will be added in the future. For current
DAB coverage and other information consult the GM
Canada website at www.gmcanada.com, your dealer or
call 1-800-263-3777.
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 will adjust 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 don't want to
use automatic volume, select OFF.
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