control GMC SONOMA 2002 Workshop Manual

3-29
Using RDS
Your audio system is equipped with a Radio Data
System (RDS). RDS is a system that receives data along
with the audio of the FM station you are currently tuned
to. You can use RDS to display program information
and to control your radio. With RDS your radio can do
the following:

Seek only to stations with the types of programs you
want to listen to,

seek to stations with traffic announcements,

receive announcements concerning local and
national emergencies, and

receive and display messages from radio stations.
RDS features are only available on FM stations which
broadcast RDS information. The RDS features of your
radio rely on receiving specific RDS information from
these stations. These features will only work when the
RDS 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.When you are tuned to an RDS station, the station name
will appear on the display, instead of the frequency.
Most RDS stations provide their station name, the time
of day and a Program Type (PTY) for their current
programming. Some stations also provide the name of
the current program.
Finding RDS Stations
To find RDS stations, perform the following steps:
1. Press the SEEK TYPE button or turn the P
-TYPE
LIST knob to display the program type list.
2. Turn the knob either clockwise or counterclockwise
to select a program type. The list is alphabetical. If
you select ANY TYPE your radio will seek to the
first PTY available.
3. Press the SEEK TYPE button to activate search.
DISP (Display): Press this knob to change what appears
on the display while using RDS. Pressing this knob will
also display an RDS station frequency or program type
when the radio is on. The display options are station
name, station frequency, PTY and the name of the
program (if available). Pressing and holding this knob
will activate the RDS default display.

3-34 AM-FM Stereo with Cassette Tape and
Compact Disc Player with Radio Data
System (RDS) and Automatic Tone Control
(If Equipped)
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn this knob clockwise to increase
volume. Turn it counterclockwise 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. The volume level should always sound the
same to you as you drive. Each higher volume setting
allows 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.
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.

3-36
Setting the Tone (Bass/Treble)
AUDIO: Press and release the AUDIO knob until
BASS or TREB appears on the display. Turn the knob
clockwise or counterclockwise to increase or decrease.
The display will show the bass or treble level. If a
station is weak or noisy, you may want to decrease
the treble.
To adjust the bass and treble to the middle position, push
and hold the AUDIO knob. The radio will produce one
beep and adjust the display level to the middle position.
To adjust all tone and speaker controls to the middle
position, push and hold the AUDIO knob when no tone
or speaker control is displayed. The radio will produce
one beep and display ALL with the level display in the
middle position.
AUTO TONE: This feature allows you to choose
bass and treble equalization settings designed for
country/western, jazz, talk, pop, rock and
classical stations.
Each time you press the AUTO TONE button, this
feature will switch to one of these program types.
To return the bass and treble to the manual mode, press
and release the AUDIO knob.Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance to the right and left
speakers, push and release the AUDIO knob until BAL
appears on the display. Turn the knob clockwise to move
the sound to the right speakers and counterclockwise to
move the sound to the left speakers.
To adjust the fade to the front and rear speakers, push
and release the AUDIO knob until FADE appears on the
display. Turn the knob clockwise to move the sound to
the front speakers and counterclockwise to move the
sound to the rear speakers.
To adjust the balance and fade to the middle position,
push the AUDIO knob then push it again and hold it
until the radio produces one beep. The balance and fade
will be adjusted to the middle position and the display
will show the speaker balance.
To adjust all tone and speaker controls to the middle
position, push and hold the AUDIO knob when no tone
or speaker control is displayed. The radio will produce
one beep and display ALL with the level display in the
middle position.

3-37
Using RDS
Your audio system is equipped with a Radio Data
System (RDS). RDS is a system that receives data along
with the audio of the FM station you are currently tuned
to. You can use RDS to display program information
and to control your radio. With RDS, the radio can do
the following:

Seek only to stations with the types of programs you
want to listen to,

seek to stations with traffic announcements,

receive announcements concerning local and
national emergencies, and

receive and display messages from radio stations.
RDS features are only available on FM stations that
broadcast RDS information. The RDS features of your
radio rely on receiving specific RDS information from
these stations. These features will only work when the
RDS 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.
When you are tuned to an RDS station, the station name
will appear on the display, instead of the frequency.Most RDS stations provide their station name, the time
of day and a Program Type (PTY) for their current
programming. Some stations also provide the name of
the current program.
Finding RDS Stations
To find RDS stations perform the following steps:
1. Push the SEEK TYPE button or turn the P
-TYPE
LIST knob to display the program type list.
2. Turn the knob either clockwise or counterclockwise
to select a program type. The list is alphabetical. If
you select ANY TYPE your radio will seek to the
first PTY available.
3. Push the SEEK TYPE button to activate search.
VOL (Volume): Turn this knob clockwise to increase
volume when RDS interrupts regular play. Turn it
counterclockwise to decrease volume.
DISP (Display): Press this knob to change what appears
on the display while using RDS. Pressing this knob will
also display an RDS station frequency or program type
when the radio is on. The display options are station
name, station frequency, PTY and the name of the
program (if available). Pressing and holding this knob
will activate the RDS default display.

3-40
Playing a Cassette Tape
Your tape player is built to work best with tapes that are
up to 30 to 45 minutes long on each side. Tapes longer
than that are so thin they may not work well in this
player. The longer side with the tape visible should face
to the right. If the ignition is on, but the radio is off, the
tape can be inserted and will begin playing. A tape
symbol is shown on the display whenever a tape is
inserted. If you hear nothing but a garbled sound, the
tape may not be in squarely. Press EJT to remove the
tape and start over.
While the tape is playing, use the VOL, AUDIO and
SEEK controls just as you do for the radio. The display
will show TAPE and an arrow showing which side of
the tape is playing.
If you want to insert a tape when the ignition is off, first
press EJT or DISP.
If an error appears on the display, see ªCassette Tape
Messagesº later in this section.1 PREV (Previous): Press this pushbutton to go to the
previous selection on the tape if the selection has been
playing for less than three seconds. If this pushbutton is
pressed and the current selection has been playing for
more than 13 seconds, it will go to the beginning of the
current selection. If this pushbutton is pressed and the
current selection has been playing from 3 to 13 seconds,
it will go to the beginning of the previous selection or
the beginning of the current selection, depending upon
the position on the tape. SEEK and a
-1 will appear on
the display while the cassette player is in the previous
mode. If this pushbutton is pressed additional times or
held, the radio will go to the displayed number of
previous selections up to 9. SEEK and a negative
number will appear on the display. Your tape must
have at least three seconds of silence between each
selection for previous to work. The sound will mute
while seeking.
2 NEXT: Press this pushbutton to go to the next
selection on the tape. If you press the pushbutton more
than once, the player will continue moving forward
through the tape. SEEK and a positive number will
appear on the display. Your tape must have at least
three seconds of silence between each selection for next
to work. The sound will mute while seeking.

3-46
Setting Preset Stations
The six numbered pushbuttons let you return to
your favorite stations. You can set up to 18 stations
(six AM, six FM1 and six FM2) by performing the
following steps:
1. Turn the radio on.
2. Press AM FM to select AM, FM1 or FM2.
3. Tune in the desired station.
4. Press AUTO EQ to select the equalization that best
suits the type of station selected.
5. Press and hold one of the six numbered pushbuttons
until you hear a beep. Whenever you press that
numbered pushbutton, the station you set will return
and the equalization that you selected will also be
automatically selected for that pushbutton.
6. Repeat the steps for each pushbutton.
Setting the Tone (Bass/Treble)
AUDIO: Push the AUDIO knob until BASS, MID or
TREB appears on the display. Turn the knob to increase
or decrease. When you use this knob, the radio's tone
setting will switch to custom. If a station is weak or
noisy, you may want to decrease the treble.To adjust bass, midrange or treble to the middle
position, select BASS, MID or TREB and push and hold
the AUDIO knob. The radio will produce one beep and
adjust the display level to zero.
To adjust all tone and speaker controls to the middle
position, push and hold the AUDIO knob when no tone
or speaker control is displayed. The radio will produce
one beep and CENTERED will appear on the display.
AUTO EQ (Automatic Equalization): This feature
allows you to choose preset bass, midrange and treble
equalization settings designed for country, jazz, talk,
pop, rock and classical program types.
The program type last chosen will appear on the display
when you first press AUTO EQ. Each time you press
this button, another program type will appear on the
display and AUTO EQ will switch to one of the preset
program types.
To return to the manual mode (CUSTOM), press the
AUTO EQ button until CUSTOM appears on the
display. Then you will be able to manually adjust the
bass, midrange and treble using the AUDIO knob.

3-47
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the right and
left speakers, push the AUDIO knob until BAL appears
on the display. Turn the knob to adjust the sound to the
left or right speakers. The middle position balances the
sound between the speakers.
To adjust the fade between the front and rear speakers,
push and hold the AUDIO knob until FAD appears on
the display. Turn the knob to adjust the sound to the
front or rear speakers. The middle position balances the
sound between the speakers.
To adjust the balance and fade to the middle position,
select balance or fade and push and hold the AUDIO
knob. The radio will beep once and will adjust the
display level to the middle position.
To adjust all tone and speaker controls to the middle
position, push and hold the AUDIO knob when tone
or speaker controls are not displayed. The radio will
produce one beep and CENTERED will appear on
the display.Using RDS
Your audio system is equipped with a Radio Data
System (RDS). RDS mode gives you many useful new
features. With RDS, the radio can do the following:

Seek only to stations with the types of programs you
want to listen to,

seek to stations with traffic announcements,

receive announcements concerning local and
national emergencies, and

receive and display messages from radio stations.
RDS features are only available for use on FM stations
which broadcast RDS information. The RDS features of
your radio rely upon receiving specific RDS information
from these stations. These features will only work when
the RDS 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.
When you are tuned to an RDS station, the station
name will appear on the display, instead of the
frequency. Most RDS stations provide their station
name, the time of day and a Program Type (PTY) for
their current programming.

3-56 Remote Cassette Tape Player (If Equipped)
If your vehicle has this feature it is located in the center
console extension.
Your tape player is built to work best with tapes that are
up to 30 to 45 minutes long on each side. Tapes longer
than that are so thin they may not work well in
this player.
To load a cassette tape with the ignition off, first press
EJECT on the remote player. Then, insert the cassette
tape. The tape will play if the ignition is on but the radio
is off.Once the tape is playing, use the control knobs for
VOL, AUTO TONE, BAL, FADE, BASS and TREB
just as you do for the radio. A lighted tape symbol
shows when a cassette tape is in the player. A lighted
arrow will also appear and show the direction of play
when a tape is active.
The player automatically senses if the cassette tape is
metal or CrO
2 and adjusts for best playback sound.
Anytime a cassette tape is inserted, the top side is
selected for play first.
Primary Radio Controls
The following functions are controlled by the
main radio:
1 PREV (Previous): Press this pushbutton or the left
SEEK arrow (in the opposite direction that the lighted
tape direction arrow points) to search for the previous
selection. A minimum three
-second blank gap is needed
for the player to stop at the beginning of the selection.
The tape direction arrow will blink during the SEEK
operation and the sound is muted in this mode.

3-57
3 NEXT: Press this pushbutton or the right SEEK arrow
(in the direction that the lighted tape direction arrow
points) to search for the next selection. The tape
direction arrow will blink during SEEK operation and
the sound is muted in this mode.
REV 4 (Reverse): Press this pushbutton to rapidly
reverse the tape. The tape will rapidly reverse to the
beginning of the cassette or until you press this
pushbutton again. The radio plays the last selected
station during reverse operation.
5: Press this pushbutton to turn Dolby NR on and
off. Dolby NR is active when a tape is inserted in the
remote cassette. The double
-D symbol will appear on
the display.
Dolby Noise Reduction is manufactured under a license
from Dolby Laboratories Licensing Corporation. Dolby
and the double
-D symbol are trademarks of Dolby
Laboratories Licensing Corporation.
FWD 6 (Forward): Press this pushbutton to rapidly
advance the tape. The tape will rapidly advance to the
end of the cassette or until you press this pushbutton
again. The radio plays the last selected station during
forward operation.AM FM: Press this button to listen to the radio
when a tape is playing. The inactive tape will remain in
the player.
TAPE AUX (Auxiliary): Press this button to play a
tape when listening to the radio. The lighted arrow will
appear next to the symbol and show the direction of play
when a tape is active.
Remote Cassette Tape Player Controls
The following functions are controlled by the remote
cassette tape player:
PROG (Program): Press this button on the remote
player to go from one side of the tape to the other.
EJECT: Press this button on the remote player to
remove the tape. EJECT can be used with either the
ignition or radio off. Also, you must press EJECT before
loading a cassette with the radio off to allow loading.

3-61 Tips About Your Audio System
Hearing damage from loud noise is almost undetectable
until it is too late. Your hearing can adapt to higher
volumes of sound. Sound that seems normal can be loud
and harmful to your hearing. Take precautions by
adjusting the volume control on your radio to a safe
sound level before your hearing adapts to it.
To help avoid hearing loss or damage do the following:
1. Adjust the volume control to the lowest setting.
2. Increase volume slowly until you hear comfortably
and clearly.NOTICE:
Before you add any sound equipment to your
vehicle
-- like a tape player, CB radio, mobile
telephone or two
-way radio -- be sure you can
add what you want. If you can, it's very
important to do it properly. Added sound
equipment may interfere with the operation of
your vehicle's engine, Delphi Electronics radio or
other systems, and even damage them. Your
vehicle's systems may interfere with the
operation of sound equipment that has been
added improperly.
So, before adding sound equipment, check with
your dealer and be sure to check federal rules
covering mobile radio and telephone units.