radio GMC SIERRA 2002 User Guide

3-11
Setting the Tone (Bass/Treble)
BASS: Press this knob lightly so it extends. Turn the
knob clockwise to increase bass and counterclockwise to
decrease bass.
TREB (Treble): Press this knob lightly so it extends.
Turn the knob clockwise to increase treble and
counterclockwise to decrease treble. If a station is weak
or noisy, you may want to decrease the treble.
Push these knobs back into their stored positions when
you're not using them.
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, either
press and release the AUTO TONE button until the
display goes blank or press and release the BASS or
TREB knobs and turn them until the display goes blank.Adjusting the Speakers (Balance/Fade)
BAL (Balance): Press this knob lightly so it extends.
Turn the knob clockwise to adjust sound to the right
speakers and counterclockwise to adjust sound to the left
speakers. The middle position balances the sound
between the speakers.
FADE: Press this knob lightly so it extends. Turn the
knob clockwise to adjust the sound to the front speakers
and counterclockwise to adjust sound to the rear
speakers. The middle position balances the sound
between the speakers.
Push these knobs back into their stored positions when
you're not using them.
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.
To load a cassette tape with the ignition off, press
EJECT or RECALL. Then, insert the cassette tape.
If the ignition is on but the radio is off, the tape will
begin playing.

3-12
Once the tape is playing, use the VOL, AUTO TONE,
BAL, FADE, BASS and TREB controls just as you do
for the radio. The tape symbol and a direction arrow will
be on the display whenever a tape is being played.
Anytime a tape is inserted, the top side is selected for
play first.
The player automatically senses if the cassette tape is
metal or CrO
2 and adjusts for best playback sound.
If an error appears on the display, see ªCassette Tape
Messagesº later in this section.
1 PREV (Previous): Press this pushbutton or the left
SEEK arrow to search for the previous selection. A
minimum three
-second blank gap is required for the
player to stop at the beginning of the selection. The tape
direction arrow will blink while in previous mode.
2 PROG (Program): Press this pushbutton to switch
from one side of the tape to the other.
3 NEXT: Press this pushbutton or the right SEEK
arrow to search for the next selection. A minimum
three
-second blank gap is required for the player to stop
at the beginning of the selection. The tape direction
arrow will blink while in next mode. The sound will
mute while searching for the next selection.REV 4 (Reverse): Press this pushbutton to rapidly
reverse the tape. Press this pushbutton again to stop
reversing the tape. The radio will play the last selected
station while reversing the tape. The tape direction
arrow will blink while in reverse mode.

5 (Dolby): Press this pushbutton to reduce cassette
tape noise. The double
-D symbol will appear on the
display while the player is in this mode.
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
forward the tape. Press this pushbutton again to stop
forwarding the tape. The radio will play the last selected
station while forwarding the tape. The tape direction
arrow will blink while in forward mode.
AM FM: Press this button to listen to the radio when
playing a tape.
TAPE AUX (Auxiliary): Press this button to play a
tape when listening to the radio. The lighted arrow will
appear and show the direction of play when a tape is in
the active mode.

3-13
EJECT: Press this button to stop a tape when it is playing
or to eject a tape when it is not playing. Eject may be
activated with the radio off. Cassette tapes may be loaded
with the radio and vehicle off if this button is pressed first.
Cassette Tape Messages
CLN (Clean): If this message appears on the display,
the cassette tape player needs to be cleaned. It will still
play tapes, but you should clean it as soon as possible to
prevent damage to the tapes and player. See ªCare of
Your Cassette Tape Playerº in the Index.
CD Adapter Kits
It is possible to use a portable CD player adapter kit
with your cassette tape player after activating the bypass
feature on your tape player.
To activate the bypass feature, use the following steps:
1. Turn the ignition to RUN or ACCESSORY.
2. Turn the radio off.
3. Press and hold the TAPE AUX button for
five seconds. The tape symbol on the display will
flash for two seconds, indicating the feature is active.
4. Insert the adapter into the cassette slot. It will power
up the radio and begin playing.
This override routine will remain active until the EJECT
button is pressed.Rear Seat Audio (RSA)
This feature allows rear seat passengers to listen to and
control any of the music sources: AM
-FM, cassette
tapes and CDs, through the Rear Seat Audio (RSA)
controller. However, the rear seat passengers can only
control the music sources that the front seat passengers
are not listening to. For example, rear seat passengers
may listen to a cassette tape through headphones while
the driver listens to the radio through the front speakers.
The rear seat passengers have control of the volume for
each set of headphones. Be aware that the front seat
audio controls always have priority over the RSA
controls. If the front seat passengers switch the source
for the main radio to a remote source, the RSA will play
the same remote source. The rear speakers will be muted
when the RSA power is turned on. You may operate the
RSA functions even when the main radio is off.
Primary Radio Controls
The following function is controlled by the knob on the
main radio:
PWR (Power): Push this knob twice to turn RSA off.

3-14
Rear Seat Audio Controls
The following functions are controlled by the RSA
system buttons:
PWR (Power): Press this button to turn the rear seat
audio system on or off. The rear speakers will be muted
when the power is turned on. You may operate the rear
seat audio functions even when the primary radio power
is off.VOL (Volume): Press this knob lightly so it extends.
Turn the knob clockwise to increase volume and
counterclockwise to decrease volume. Push the knob
back into its stored position when you're not using it.
The upper knob controls the upper headphone and the
lower knob controls the lower headphone.
AM FM: Press this button to switch between AM, FM1
and FM2. If the front passengers are already listening to
AM FM, the RSA controller will not switch between the
bands and cannot change the frequency.
Press AM FM to return to listening to the radio when a
cassette tape or CD is playing. The inactive tape or CD
will remain safely inside the radio for future listening.
SEEK : While listening to AM, FM1 or FM2,
press the up arrow to tune to the next station and stay
there. Press the down arrow to tune to the previous
station and stay there. The sound will mute while
seeking. If the front radio is in use, you cannot seek
through different stations.

3-15
While listening to a cassette tape, press the up arrow to
hear the next selection on the tape. Press the down arrow
to go back to the previous selection. If the cassette tape
on the front radio is in use, you cannot seek through
different selections on a tape.
While listening to a CD, press the up arrow to hear
the next track on the CD. Press the down arrow to
go back to the start of the current track (if more than
eight seconds have played). If the CD player on the front
radio is in use, you cannot seek through different tracks.
To scan preset stations, press and hold SEEK until the
radio goes into scan mode. The radio will go to a station,
play for a few seconds, then go on to the next station.
Press either SEEK arrow again to stop scanning. If the
front radio is in use, you cannot scan through different
stations.P.SET PROG (Preset Program): The front passengers
must be listening to something different for each of
these functions to work:

Press this button to scan through the preset radio
stations set on the pushbuttons on the main radio.
The radio will go to a preset station, play for a few
seconds, then go on to the next preset station. Press
this button again to stop scanning.

When a cassette tape is playing, press this button to
go to the other side of the tape.

When a CD is playing in the CD changer, press this
button to select a disc.
TAPE CD: Press this button to switch between playing
a tape and CD changer if all are loaded. Press AM FM
to return to the radio when a cassette tape or CD is
playing. The inactive tape or CD will remain safely
inside the radio for future listening.

3-16 Compact Disc Changer
The compact disc changer plays up to six standard size
CDs continuously. Individual CDs may be loaded or
ejected into or from any position.
A green light on each numbered button indicates a CD is
loaded in the respective position. An amber light on a
numbered button indicates that a CD is playing. When
loading CDs, the loading slot indicators turn amber to
indicate that the player is ready to accept a CD. CDs can
be loaded or ejected with the radio or the ignition being
on or off.
You must load CDs with the label side up. If you do not,
the player will automatically eject the CDs.
NOTICE:
Loading CDs with adhesive labels will damage
the player.
To load a CD perform the following steps:
1. Press the LOAD button. Available positions will
blink amber.
2. Select a position by pressing the desired numbered
button with the amber blinking light. If a button is
not pressed within five seconds, the changer will go
to the lowest available position.
3. Load the CD when the loading slot indicators turn
amber. An internal door will open allowing a single
CD to be inserted into the changer. After
approximately 10 seconds the changer will be ready
to play.

3-17
To load two or more CDs perform the
following steps:
1. Press and hold the LOAD button. The first CD will
be loaded into the lowest numbered empty position.
2. Load a single CD when the loading slot indicators
turn amber. After about 10 seconds the changer will
cycle to the next available position.
3. Repeat Step 2 until all CDs are loaded into all of the
desired positions. If you do not wish to load all of
the positions, you can cancel the load all function by
pressing a button with a green flashing indicator
light or wait 20 seconds for the changer to time out.
To eject a single CD perform the following steps:
1. Press the eject button (upward pointing arrow).
The buttons with loaded CDs will blink amber.
2. Press one of the amber blinking buttons to select the
location of the CD you want to eject. The changer
will move to that location and eject the CD. If you
do not remove the CD from the player within
10 seconds, it will be reloaded. If the eject button
is pressed and a numbered location button is not
pressed within five seconds, the current or last
played CD will be ejected.
To eject all CDs, press and hold the eject button.There are two ways to play a CD. Perform one of the
following:

Press the desired numbered button with a green
indicator light on the CD changer.

Press the CD TAPE button on the radio. The CD
changer will go to its last played position.
1 PREV (Previous): Press this pushbutton to go to the
previous track if the current track has been playing for
less than eight seconds. If this pushbutton is pressed and
the current track has been playing for more than eight
seconds, it will go to the beginning of the current track.
If you hold or press this pushbutton more than once, the
player will continue moving back through the CD. The
sound will mute while seeking.
2 PROG (Program): Press this pushbutton to select a
CD. The CD number and track number will be
displayed.
3 NEXT: Press this pushbutton to go to the next track.
If you hold this pushbutton or press it more than once,
the player will continue moving forward through the
CD. The sound will mute while seeking.
REV 4 (Reverse): Press and hold this pushbutton
to reverse quickly through a track. Release it to
resume playing.

3-18
FWD 6 (Forward): Press and hold this pushbutton
to advance quickly through a track. Release it to
resume playing.
SEEK : Press the right SEEK arrow to go to the
next track on the CD. Press the left SEEK arrow to go
to the previous track on the CD. The sound will mute
while seeking.
P.SCAN (Preset Scan): Press this button to hear the
tracks in random, rather than sequential, order. DSC will
appear on the radio display, which will randomly play
the tracks on the current CD. Press this button again to
make the radio display ALL, which will randomly play
all of the loaded CDs. Press this button again to turn off
random play, OFF will appear on the radio display.
AM FM: Press AM FM to listen to the radio when a CD
is playing.
TAPE AUX: Press this button if you have a CD loaded
in the changer and the radio is turned on, to play a CD.
Press this button to switch between playing a tape and
the CD changer if both are loaded.Compact Disc Changer Errors
ERR (Error): If this message appears on the display, it
could be for one of the following reasons:

You are driving on a very rough road. (The CD
should play when the road gets smoother.)

A CD is upside down.

It is dirty, scratched or wet.

It is very humid. (If so, wait about an hour and
try again.)

The CD player is very hot.
Press RECALL to make ERR turn off the display.
If any error occurs repeatedly or if an error cannot be
corrected, contact your dealer.

3-19 Theft-Deterrent Feature
THEFTLOCK
is designed to discourage theft of your
radio. It works by using a secret code to disable all radio
functions whenever battery power is removed.
The THEFTLOCK feature for the radio may be used or
ignored. If ignored, the system plays normally and the
radio is not protected by the feature. If THEFTLOCK is
activated, your radio will not operate if stolen.
When THEFTLOCK is activated, the radio will display
LOC to indicate a locked condition anytime battery
power has been interrupted. If your battery loses power
for any reason, you must unlock the radio with the secret
code before it will operate.
Activating the Theft
-Deterrent Feature
The instructions which follow explain how to enter your
secret code to activate the THEFTLOCK system. It is
recommended that you read through all nine steps
before starting the procedure.
If you allow more than 15 seconds to elapse between
any steps, the radio automatically reverts to time and
you must start the procedure over at Step 4.
1. Write down any three or four
-digit number from
000 to 1999 and keep it in a safe place separate from
the vehicle.2. Turn the ignition to ACCESSORY or RUN.
3. Turn the radio off.
4. Press the 1 and 4 pushbuttons at the same time.
Hold them down until
--- shows on the display.
Next you will use the secret code number which you
have written down.
5. Press MN and 000 will appear on the display.
6. Press MN again to make the last two digits agree
with your code.
7. Press HR to make the first one or two digits agree
with your code.
8. Press AM FM after you have confirmed that the
code matches the secret code you have written down.
The display will show REP to let you know that you
need to repeat Steps 5 through 7 to confirm your
secret code.
9. Press AM FM and this time the display will show
SEC to let you know that your radio is secure. The
LED indicator by the volume knob will begin
flashing when the ignition is turned off.

3-20
Unlocking the Theft-Deterrent Feature After a
Power Loss
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition on. LOC will appear on the display.
2. Press MN and 000 will appear on the display.
3. Press MN again to make the last two digits agree
with your code.
4. Press HR to make the first one or two digits agree
with your code.
5. Press AM FM after you have confirmed that the code
matches the secret code you have written down. The
display will show SEC, indicating the radio is now
operable and secure.
If you enter the wrong code eight times, INOP will
appear on the display. You will have to wait an hour
with the ignition on before you can try again. When you
try again, you will only have three chances to enter the
correct code before INOP appears.
If you lose or forget your code, contact your dealer.Disabling the Theft-Deterrent Feature
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition to ACCESSORY or RUN.
2. Turn the radio off.
3. Press the 1 and 4 pushbuttons at the same time. Hold
them down until SEC shows on the display.
4. Press MN and 000 will appear on the display.
5. Press MN again to make the last two digits agree
with your code.
6. Press HR to make the first one or two digits agree
with your code.
7. Press AM FM after you have confirmed that the code
matches the secret code you have written down. The
display will show
---, indicating that the radio is no
longer secured.
If the code entered is incorrect, SEC will appear on the
display. The radio will remain secured until the correct
code is entered.
When battery power is removed and later applied to a
secured radio, the radio won't turn on and LOC will
appear on the display.
To unlock a secured radio, see ªUnlocking the Theft
-Deterrent
Feature After a Power Lossº earlier in this section.