lock CHEVROLET AVALANCHE 2002 1.G Repair Manual

3-2
Comfort Controls
Heater and Air Conditioning
Comfort Controls
Fan Knob
(Fan): The knob on the left side of the control panel
adjusts the fan speed. To increase airflow, turn the knob
clockwise. To decrease airflow, turn it counterclockwise.
To turn the fan off, turn the knob to OFF.Temperature Knob
The middle knob on the control panel lets you select the
temperature of the air flowing into the passenger area.
Turn the knob clockwise toward the red area for warmer
air. Turn the knob counterclockwise toward the blue area
for cooler air.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
(Vent): This setting directs the air through the
instrument panel outlets and the center floor console
(if equipped).
(Bi-Level): Air is delivered through the
instrument panel outlets and center floor console outlets
(if equipped) as well as the floor outlets. The air flow
can be divided between vent and floor depending upon
where the knob is placed between the settings. Pressing
the A/C button while in this mode causes cooler air to
come out of the instrument panel outlets and center floor
console outlets (if equipped) and warmer air to come out
of the floor outlets.

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Recirculation will not be available in floor, blend, or
defrost modes to help reduce window fogging. If the
recirculation button is pressed in these modes, the
LED indicator for recirculation will flash three times
indicating that forced outside is activated and
recirculation is not available.
If the air conditioning system is activated and system
demand is high in situations such as city traffic, idling,
or very hot weather, the system will automatically
switch from outside air to recirculation. The LED
indicator will not change. After demand on the system is
not so great, the system will return to outside air.
A/C (Air Conditioning): This button is used to
control the air conditioning compressor. Turning the
system on will allow air to be cooled and dehumidified
inside the vehicle.
Air conditioning will be automatically disabled when
the outside air temperature drops below a level at
which air conditioning is effective.
Electronic Climate Control System
(If Equipped)
Fan Knob
(Fan): The knob on the left side of the electronic
climate control panel regulates the fan speed. To manually
increase airflow, move the knob clockwise. To manually
decrease airflow, move it counterclockwise.
OFF: If the knob is in OFF, outside air will still enter
the vehicle, and will be directed based on the position of
the mode knob.

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AUTO (Automatic): If the knob is in AUTO,
the fan speed will vary as the system maintains the
selected temperature.
When both the fan knob and mode knobs are in the
AUTO position, the system will then automatically
maintain the desired cabin temperature as selected
by the temperature knob. Manual operation is
also available.
Temperature Knob
The middle knob on the control panel lets you select
the desired air temperature in your vehicle. This knob
will allow you to adjust the interior air temperature
independent of the function knob setting. Move the
knob clockwise toward 82 for warmer air. Move the
knob counterclockwise toward 66 for cooler air. When
the system is set for automatic operation, sensors will
control the fan speed.
Full Hot: If you turn the temperature knob past 82
F
(28
C), the system will go into the ªfull hotº mode.
The system will remain at that maximum heating setting
and the fan will blow at the speed to which the fan knob
is set. If the fan is in AUTO, it will run at full speed.Full Cold: If you turn the temperature knob past 66
F
(19
C), the system will go into the ªfull coldº mode.
The system will remain at that maximum cooling setting
and the fan will blow at the speed to which the fan knob
is set. If the fan is in AUTO, it will run at full speed.
Mode Knob
- Manual Operation
The right knob on the control panel allows you to
choose the direction of air delivery.
You can choose to set the climate control system
operations yourself, or let the system work for you
by placing the system in AUTO mode. See ªMode
Knob
- Automatic Operationº later in this section.
(Vent): This setting directs most of the air through
the instrument panel outlets and a small amount through
the floor outlets.
(Bi-Level): This setting delivers air through
the floor outlets as well as the instrument panel outlets.
(Floor): This setting directs most of the warmed
air through the floor outlets and some air through the
windshield defroster outlets. Recirculation will not be
available in this mode. See ªRecirculationº following
for more information.

3-12
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 of its controls, to be sure you're
getting the most out of the advanced engineering that
went into it.
Your vehicle has a feature called Retained Accessory
Power (RAP). With RAP, you can play your audio
system even after the ignition is off. See ªRetained
Accessory Powerº in the Index.
Setting the Clock
Press and hold HR until the correct hour appears on
the display. Press and hold MN until the correct minute
appears on the display. To display the clock with the
ignition off, press RECALL or HR/MN and the time
will be displayed for a few seconds. There is an initial
two
-second delay before the clock goes into the
time
-set mode.
AM-FM Stereo with Compact Disc Player
and Automatic Tone Control
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): To increase volume, turn this knob
clockwise. Turn it counterclockwise to decrease volume.
The knob is capable of rotating continuously.

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SCV (Speed-Compensated Volume): 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. Turn the control ring behind the upper
knob clockwise to adjust the SCV. Then, as you drive,
SCV automatically increases the volume, as necessary,
to overcome noise at any particular speed. The volume
level should always sound the same to you as you drive.
If you don't want to use SCV, turn the control all the
way down. Each notch on the control ring allows for
more volume compensation at faster vehicle speeds.
RECALL: Display the time with the ignition off by
pressing this button. When the radio is playing, press
this button to recall the station frequency.
Finding a Station
AM FM: Press this button to switch between AM, FM1
and FM2. The display will show your selection.
TUNE: Press this knob lightly so it extends. Turn it to
choose radio stations. Push the knob back into its stored
position when you're not using it.SEEK: Press the right arrow to tune to the next
station and the left arrow to tune to the previous station
and stay there. The sound will mute while seeking.
To scan stations, press and hold SEEK for two seconds
until SCAN appears on the display. Scan allows you to
listen to stations for a few seconds. The receiver will
continue to scan and momentarily stop at each station
until you press the button again. The sound will mute
while scanning.
P.SCAN (Preset Scan): The preset scan button lets
you scan through your favorite stations stored on your
pushbuttons. Select either the AM, FM1 or FM2 mode
and then press P.SCAN. It will scan through each station
stored on your pushbuttons and stop for a few seconds
before continuing to scan through all of the pushbuttons.
Press P.SCAN again or one of the pushbuttons to stop
scanning to listen to a specific stored station. P.SCAN
will light up on the display while in this mode. If one
of the stations stored on a pushbutton is too weak for
the location you are in, the radio display will show the
channel number (P1 through P6) for several seconds
before advancing to the next preset station.

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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 the band.
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 pushbutton.
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.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. When the BASS knob is turned,
the AUTO TONE display will go blank.
TREB (Treble): Press this knob lightly so it extends.
Turn the knob clockwise to increase treble and
counterclockwise to decrease treble. When the TREB
knob is turned, the AUTO TONE display will go blank.
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.

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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 knob and turn it until the display goes blank.
See ªSetting Preset Stationsº listed previously to
program the auto tone feature.
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 for 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 Compact Disc
PWR (Power): Press this knob to turn the system on.
(You can also turn the system on when you insert a
compact disc into the player with the ignition on.)
Insert a disc partway into the slot, label side up. The
player will pull it in. Wait a few seconds and the disc
should play. CD and a CD symbol will also appear on
the display. Anytime you are playing a CD, the letters
CD will be next to the CD symbol.
1 PREV (Previous): Press PREV or the SEEK left
arrow to search for the previous selection. If you hold
this pushbutton or press it more than once, the disc will
advance further. Sound is muted in this mode.
2 RDM (Random): Press this pushbutton to play the
tracks on the disc in random order. While in the RDM
mode, RANDOM appears on the display. Press RDM
again to return to normal play.
3 NEXT: Press NEXT or the SEEK right arrow to
search for the next selection. If you hold this pushbutton
or press it more than once, the disc will advance further.
The next track number will appear on the display. Sound
is muted in this mode.

3-17
Compact Disc Messages
If you're driving on a very rough road or if it's very hot,
the disc may not play and Err (error) may appear on
the display. When the road becomes smooth or the
temperature returns to normal, the disc should play.
If the disc comes out, it could be one of the following:

The disc is upside down.

It is dirty, scratched or wet.

It is very humid. (If so, wait about an hour and
try again.)
Press RECALL to make Err go off the display.
If any error occurs repeatedly or if an error can't be
corrected, contact your dealer.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.

3-18
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 together. 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 control will begin
flashing when the ignition is turned off.

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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 together. 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.