2002 GMC SONOMA audio

3-45
AUTO VOL (Automatic Volume): Your system has a
feature called automatic volume. With this feature, 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 MIN, MED or MAX. Each higher choice 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.
The volume level should always sound the same to you
as you drive. If you don't want to use automatic volume,
select OFF.
RCL (Recall): Push this knob to display the station
being played or to display the clock. Pushing this knob
with the ignition off will display the clock
Finding a Station
AM FM: Press this button to switch between AM, FM1
and FM2. The display shows your selection.
TUNE: Turn this knob to select radio stations.
SEEK : Press the right or left arrow to go to the
next or previous station and stay there. The sound will
mute while seeking.


SCAN : Press and hold either SCAN arrow for
two seconds until SC appears on the display and you
hear a beep. The radio will go to a station, play for a few
seconds, then go on to the next station. Press either
SCAN arrow again to stop scanning. If you press SCAN
for more than four seconds, the radio will change to
preset scan mode. The sound will mute while scanning.
To scan preset stations, press and hold either SCAN
arrow for more than four seconds, PRESET SCAN
will appear on the display. You will hear a double beep.
The radio will go to a preset station stored on your
pushbuttons, play for a few seconds, then go on to
the next preset station. Press either SCAN arrow
again to stop scanning presets. The sound will mute
while scanning.

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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.

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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.

3-61 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.

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When you replace parts of your braking system -- for
example, when your brake linings wear down and you
need new ones put in
-- be sure you get new approved
GM replacement parts. If you don't, your brakes may no
longer work properly. For example, if someone puts in
brake linings that are wrong for your vehicle, the
balance between your front and rear brakes can
change
-- for the worse. The braking performance
you've come to expect can change in many other ways if
someone puts in the wrong replacement brake parts.
Battery
Your new vehicle comes with a maintenance free
ACDelco
battery. When it's time for a new battery, get
one that has the replacement number shown on the
original battery's label. We recommend an ACDelco
battery. See ªEngine Compartment Overviewº in the
Index for battery location.
WARNING: Battery posts, terminals and related
accessories contain lead and lead compounds, chemicals
known to the State of California to cause cancer and
reproductive harm. Wash hands after handling.
Vehicle Storage
If you're not going to drive your vehicle for 25 days
or more, remove the black, negative (
-) cable from
the battery. This will help keep your battery from
running down.
CAUTION:
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
aren't careful. See ªJump Startingº in the Index
for tips on working around a battery without
getting hurt.
Contact your dealer to learn how to prepare your vehicle
for longer storage periods.
Also, for your audio system, see ªTheft
-Deterrent
Featureº in the Index.

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Part B: Owner Checks and Services
Listed in this part are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See ªEngine Oilº in the Index for
further details.Engine Coolant Level Check
Check the engine coolant level and add DEX
-COOL

coolant mixture if necessary. See ªEngine Coolantº in
the Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See ªWindshield Washer Fluidº in the Index
for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures.
Don't forget to check your spare tire. See ªTiresº in the
Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See ªAudio Systemsº in the
Index for further details.