2002 GMC SIERRA buttons

3-10
SEEK : Press the right or left arrow to seek to the
next or previous station and stay there. The radio will
seek to stations with a strong signal only. The sound will
mute while seeking.
To scan station, press and hold SEEK for two seconds
until SCAN appears on the display. The radio will go to
a station, play for a few seconds and flash the station
frequency, then go on to the next station. Press one of
the SEEK arrows again to stop scanning. The radio will
scan to stations with a strong signal only. The sound will
mute while scanning.
P.SCAN (Preset Scan): Press this button and P. SCAN
will appear on the display. The radio will go to the first
preset station stored on your pushbuttons, play for a few
seconds and flash the station frequency, then go on to
the next preset station. This feature will only scan the
six presets that are in the selected band. Press this button
again or a pushbutton to stop scanning presets. The
channel number (P1
-P6) will appear momentarily just
before the frequency is displayed. The radio will scan
preset stations with a strong signal only. The sound will
mute while scanning.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 TONE to select the setting you prefer.
5. Press and hold one of the six pushbuttons. The sound
will mute. When it returns, release the button.
Whenever you press that numbered pushbutton, the
station you set will return and the tone you selected
will be automatically selected for that pushbutton.
6. Repeat the steps for each pushbutton.

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.

3-17
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.

3-19 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.

3-21 Audio Steering Wheel Controls
You can control certain radio functions using the buttons
on your steering wheel.
PROG (Program): Press this button to play a station
you have programmed on the radio preset buttons on the
selected band. If a cassette tape is playing, press this
button to play the other side of the tape. If a compact
disc is playing in the CD changer, press this button to go
to the next available CD.
SEEK : Press the up or down arrow to seek to the
next or previous radio station and stay there. If a cassette
tape or compact disc is playing, the player will advance
with the up arrow and reverse with the down arrow.
MUTE: Press this button to silence the system. Press it
again to turn on the sound.
VOL (Volume): Press the up or down arrow to
increase or decrease volume.