2002 CHEVROLET TRAIL BLAZER Owners Manual

3-13
Audio Systems
Your audio system has been designed to operate easily
and give years of listening pleasure. You will get the
most enjoyment out of it if you acquaint yourself with it
first. Find out what your audio system can do and how
to operate all its controls, to be sure you're getting the
most out of the advanced engineering that went into it.
Setting the Clock
Press and hold the HR or MN buttons, located below the
tune knob, for two seconds. Then press and hold HR
until the correct hour appears. AM or PM will appear on
the display. Press and hold MN until the correct minute
appears. The clock may be set with the ignition on or
off. The clock symbol will appear on the display in
time
-set mode.
To set the clock to the time of an FM station broadcasting
Radio Data System (RDS) information, press and hold
HR and MN at the same time for two seconds until
UPDATED and the clock symbol appear on the display.
If the time is not available from the station, NO UPDAT
will appear on the display instead.
RDS clock time is broadcast once a minute. Once you
have tuned to an RDS broadcast station, it may take a
few minutes before pressing and holding the HR MN
buttons will result in an update to the clock time.
AM-FM Stereo with Cassette Tape Player
with Radio Data System (RDS) and
Automatic Tone Control
Playing the Radio
VOL PWR: Press this control to turn the system on and
off. Turn this control clockwise to increase volume.
Turn it counterclockwise to decrease volume.

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AUTO VOL: Your system has a feature called
Speed
-Compensated Volume (SCV). With SCV, your
audio system adjusts automatically to make up for road
and wind noise as you drive.
Set the volume at the desired level. Press AUTO VOL
to adjust the SCV. AVOL will appear on the display.
Each time you press AUTO VOL, another volume
setting (LOW, MEDIUM, HIGH or OFF) will appear
on the display. The volume level should always sound
the same to you as you drive. Each volume setting
allows for more volume compensation at faster vehicle
speeds. NONE will appear on the display if the radio
cannot determine the vehicle speed. If you don't want
to use SCV, select OFF.Finding a Station
AM FM: Press this button to switch between AM, FM1
and FM2. The display will show your selection.
TUNE DISP: Turn this control to choose radio stations.
Pressing this control will also display an RDS station
frequency or program type when the radio is on.
Pressing this control when the ignition is off will display
the clock.
 SEEK PSCAN
: To seek, press the right arrow to
tune to the next station and the left arrow to tune to the
previous station and stay there.
To scan your preset stations, press and hold one of
the arrows for more than two seconds. The radio will
produce one beep. Use preset scan to listen to each of
your favorite stations stored on your pushbuttons for
a few seconds. The radio will scan through each of
the stations stored on your pushbuttons, except those
stations with weak reception. Press one of the arrows or
one of the pushbuttons again to stop scanning. SCAN
will be displayed whenever the tuner is in the preset
scan mode. The channel number (P1 through P6) will
appear with the frequency. In FM mode, this function
will scan through the current band such as FM1 or FM2.

3-15
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 the band.
3. Tune in the desired station.
4. Press AUTO TONE to choose the bass and treble
equalization that best suits the type of station you
are listening to.
5. Press and hold one of the six numbered pushbuttons.
The radio will produce one beep. Whenever you
press that numbered pushbutton, the station you set
will return and the bass and treble equalization that
you selected will also be automatically selected for
that pushbutton.
6. Repeat the steps for each pushbutton.Setting the Tone (Bass/Treble)
P
-TYPE LIST AUDIO: To adjust the bass, press and
release the P
-TYPE LIST AUDIO control until BASS
appears on the display. Then turn the control clockwise
to increase bass and counterclockwise to decrease bass.
The display will show the bass level.
To set the bass to the middle position, press and hold the
P
-TYPE LIST AUDIO control. The radio will produce
one beep and set the display level to the middle position.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
To adjust the treble, press and release the P
-TYPE
LIST AUDIO control until TREB appears on the
display. Turn the control clockwise to increase treble
and counterclockwise to decrease treble. The display
will show the treble level. If a station is weak or noisy,
you may want to decrease the treble.

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To set treble to the middle position, press and hold the
P
-TYPE LIST AUDIO control. The radio will produce
one beep and set the display level to the middle position.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
When you use this control, the radio's AUTO TONE
setting will return to manual.
AUTO TONE: This feature allows you to choose preset
bass and treble equalization settings designed for rock,
news, pop, jazz, classical and country stations.
Each time you press the AUTO TONE button, this
feature will change to one of the preset equalization
settings previously listed.
To return the bass and treble to the manual mode, press
and release the P
-TYPE LIST AUDIO control. See
ªSetting Preset Stationsº listed previously to program
the auto tone feature.Adjusting the Speakers (Balance/Fade)
To adjust the balance, press and release the P
-TYPE
LIST AUDIO control until BAL appears on the display.
Turn the control clockwise to move the sound to the
right speakers and counterclockwise to move the sound
to the left speakers.
The middle position balances the sound between the
speakers. To set the balance to the middle position, press
the P
-TYPE LIST AUDIO control briefly, then press it
again and hold it until the radio emits one beep. The
balance will be set to the middle position and the display
will show the speaker balance.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
To adjust the fade, press and release the P
-TYPE LIST
AUDIO control until FADE appears on the display. Turn
the control clockwise to move the sound to the front
speakers and counterclockwise to move the sound to the
rear speakers.

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The middle position balances the sound between the
speakers. To set the fade to the middle position, press
the P
-TYPE LIST AUDIO control briefly, then press
it again and hold it until the radio emits one beep. The
fade will be set to the middle position and the display
will show the speaker balance.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
Using RDS Mode
Your audio system is equipped with a Radio Data
System (RDS). RDS is a system that sends data along
with the audio of the FM station you are currently tuned
to. RDS displays program information and can 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 on 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, please 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.
TUNE DISP: Press this control to change what appears
on the display while using RDS. Pressing this control
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
control will activate the RDS default display.

3-18
Accessing RDS Stations
To access RDS stations perform the following steps:
1. Push the SEEK TYPE button or turn the P
-TYPE
LIST AUDIO control to display the program
type list.
2. Turn the control 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 PWR: Turn this control clockwise to increase
volume when RDS interrupts regular play. Turn it
counterclockwise to decrease volume.
P
-TYPE LIST AUDIO: Turn this control clockwise
or counterclockwise to select the Program Type (PTY)
you want to listen to. TYPE and a PTY will appear on
the display. Press the SEEK TYPE button and the radio
will seek to the first RDS broadcaster of the selected
program type. If the radio cannot find the desired
program type, NONE will appear on the display and the
radio will return to the last station you were listening to.AM FM: The AM FM button operates the alternate
frequency feature. This feature allows the radio to
switch automatically to a stronger station with the same
programming. Alternate frequency is off by default from
the factory. Press and hold AM FM for two seconds to
turn alternate frequency on or off. AF ON or AF OFF
will appear on the display and the radio will beep once.
The radio will not switch automatically to other stations
when alternate frequency is off.
SEEK TYPE: Press this button to go to a station with
the last selected PTY; TYPE and the last selected PTY
will appear on the display, if it is not already showing.
Press SEEK TYPE a second time to seek. If a station
with the selected PTY is not found, the radio will return
to the original station and display NONE.

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RDS Radio Announcements
(Alert): Alert warns of national or local emergencies.
You will not be able to turn off alert announcements.
ALERT! appears on the display when an alert
announcement plays. When an alert announcement
comes on the tuned radio station, you will hear it, even
if the volume is muted or a cassette tape or compact disc
is playing. If the cassette tape or compact disc player is
playing, play will stop for the announcement and resume
when the announcement is finished.
This function will only work during actual emergency
broadcasts, and will not work during tests of the
emergency broadcast system. This feature is not
supported by all RDS stations.
INFO: If the current station has a message, the INFO
icon will appear on the display. These text messages are
from the RDS broadcaster to the listening public and
may be general information such as artist and song title,
call in phone numbers, etc. Press this button to see the
message. If the whole message does not appear on the
display, parts of the message will appear every
three seconds until the message is completed.To scroll through the message at your own speed, press
the INFO button again for less than one second. A new
group of words will appear on the display. Once the
complete message has been displayed, the INFO icon
will disappear from the display until another new
message is received. The old message can be displayed
by pressing the INFO button until a new message is
received or a different station is tuned to.
TRAF: Press this button to receive traffic
announcements. If the current tuned station does not
broadcast traffic announcements, the radio will seek to a
station that does. The TRAF icon will flash on the
display. When the radio finds a station that broadcasts
traffic announcements, it will stop. If no station is found,
NO TRAF will appear on the display.
Your radio can be programmed to interrupt the playback
of a cassette tape, CD or FM radio by enabling the
traffic interrupt feature. Press the TRAF button once to
seek to an RDS station that supports the traffic interrupt
feature if the current tuned station does not. The TRAF
icon will flash on the display when seeking for a station
that supports traffic interrupt. When the traffic interrupt
feature is on, TRAF will appear on the display.

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When a traffic announcement comes on the tuned radio
station, you will hear it, even if the volume is muted or a
cassette tape or compact disc is playing. The TRAF icon
and TRAFFIC will appear on the display while the
traffic announcement plays. If the cassette tape or
compact disc player was being used, the tape or compact
disc will stay in the player and resume play at the point
where it stopped.
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 and 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 PWR, the TUNE
DISP control, and the SEEK PSCAN control 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 TUNE DISP.
If an error appears on the display, see ªRadio/Cassette
Tape Messagesº later in this section.
1 PREV: Press this button or the left SEEK PSCAN
arrow to go to the previous selection on the tape if the
selection has been playing for less than three seconds.
If the 1 PREV button or the left SEEK PSCAN arrow 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 the 1 PREV button or the left SEEK
PSCAN arrow 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 1 PREV mode. If 1 PREV or the
left SEEK PSCAN arrow 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 1 PREV to work. The sound will mute
while seeking.