lock CHEVROLET EXPRESS 2000 Service Manual

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Section 3 Comfort Controls and Audio Systems
In this section, you'll find out how to operate the comfort control and audio systems offered with your vehicle.
Be sure to read about the particular systems supplied with your vehicle.
3
-2 Comfort Controls
3
-7 Air Conditioning
3
-7 Heating
3
-7 Defrosting
3
-8 Rear Window Defogger (If Equipped)
3
-9 Ventilation System
3
-10 Audio Systems
3
-10 Setting the Clock for Systems without Radio
Data System
3
-11 Setting the Clock for Systems with Radio
Data System
3
-11 AM-FM Stereo
3
-14 AM-FM Stereo with Cassette Tape Player
(If Equipped)
3
-20 AM-FM Stereo with Compact Disc Player
(If Equipped)3
-24 AM-FM Stereo with Cassette Tape and
Compact Disc Player with Radio Data System
(RDS) and Automatic Tone Control
(If Equipped)
3
-35 AM-FM Stereo with 6-Disc Compact Disc
Player with Programmable Equalization and
Radio Data System (RDS) (If Equipped)
3
-46 Theft-Deterrent Feature RDS Radios
(If Equipped)
3
-46 Theft-Deterrent Feature Non-RDS Radios
(If Equipped)
3
-47 Understanding Radio Reception
3
-47 Tips About Your Audio System
3
-48 Care of Your Cassette Tape Player
3
-50 Care of Your Compact Discs
3
-50 Care of Your Compact Disc Player
3
-50 Fixed Mast Antenna
3
-50 Chime Level Adjustment (RDS Radios Only)

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Fan Knob
The knob on the left side of the control panel regulates
the fan speed. The knob has four speed positions. To
increase airflow, turn the knob toward HI. To decrease
airflow, turn it toward LO. To turn the fan off, turn the
mode knob on the far right to OFF.
Temperature Knob
The middle knob on the control panel lets you select
the temperature of the air flowing into the passenger
compartment of your vehicle. This knob will allow you
to adjust the air temperature independently of the
function knob setting. Turn the knob toward the red
area for warmer air. Turn the knob toward the blue
area for cooler air.
Mode Knob
The right knob on the control panel changes the
heater/air conditioning setting.
MAX A/C (Maximum Air Conditioning): Turn the
right knob to MAX A/C for maximum cooling. This
setting puts the system in the recirculation mode and
helps to maximize your air conditioner's performance
and your vehicle's fuel economy. This setting also coolsthe air the fastest. After the vehicle's interior reaches a
comfortable temperature, turn the knob clockwise to
place the air conditioning system in the A/C mode.
A/C (Air Conditioning): This setting is used for normal
cooling on hot days. It cools outside air and directs it
through the instrument panel outlets.
(Bi-Level Air Conditioning): This setting divides
airflow between the floor vents and instrument panel
vents. The air conditioning compressor will cycle
continuously in this setting as long as the outside air
temperature is warm enough to activate the compressor.
(Vent): This setting directs air through the
instrument panel vents.
(Floor): This setting directs air through the
floor vents.
(Floor/Defrost): This setting divides airflow
between the floor vents and the windshield. In the
blended position, the air conditioning compressor is
automatically activated to dehumidify the air.
(Defrost): This setting directs air through the
windshield defroster vents. It is useful when you have
fog or ice on the windshield.

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For warmer air, turn the knob toward the red area, and
for cooler air, turn the knob toward the blue area.
To regulate the location of the airflow, adjust the center
knob on the control panel. Turn the knob
counterclockwise for upper vent airflow or clockwise
for headliner vent air flow. Generally, the upper vents
are used for air conditioning and the floor vents for
heating. The knob can be set to any blend setting.
To adjust the airflow speed, turn the fan knob on the left
side of the control panel to the desired fan speed.
To activate the rear control, turn the fan knob on the
front control to REAR CNTL.
Rear Passenger Control
The rear control works just like the front control. It will
allow second seat passengers to adjust the controls if the
front control is switched to the rear position.

3-10 Ventilation Tips

Keep the hood and front air inlet free of ice, snow, or
any other obstruction (such as leaves). The heater
and defroster will work far better, reducing the
chance of fogging the inside of your windows.

When you enter a vehicle in cold weather, turn the
fan to HI for a few moments before driving off. This
helps clear the intake ducts of snow and moisture,
and reduces the chance of fogging the inside of
your windows.

Keep the air path under the front seats clear of
objects. This helps air to circulate throughout
your vehicle.
Your vehicle has air vents in the center and on the sides
of your instrument panel.
You can move the vents from side to side or up and
down to direct the flow of air, or close the vents
altogether. When you close a vent, it will increase the
flow of air coming out of any vents that are open.
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.
Setting the Clock for Systems without Radio
Data System
Press and hold the HR or MIN arrow for two seconds.
Then press the HR (down) arrow until the correct hour
appears. Press and hold the MIN (up) arrow until the
correct minute appears. The clock may be set with the
ignition on or off.

3-11 Setting the Clock for Systems with Radio
Data System
Your radio may have a button marked with an H or
HR to represent hours and an M or MIN to
represent minutes.
Press and hold the hour button until the correct hour
appears. AM or PM will appear on the display for
morning or afternoon hours. Press and hold the minute
button until the correct minute appears. The clock may
be set with the ignition on or off.
To set the clock to the time of an FM station
broadcasting Radio Data System (RDS) information,
press and hold the hour and minute buttons at the same
time for two seconds until UPDATED and the clock
symbol appears 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 for your clock time to update.
AM-FM Stereo
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn the knob clockwise to increase
volume. Turn it counterclockwise to decrease volume.
RCL (Recall): Pressing this knob will display the
station being played or it will display the clock. Clock
display is available with the ignition turned off.

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To adjust balance or fade to the middle position, select
BAL or FAD. Then press and hold AUDIO for more
than two seconds until you hear a beep. L and a zero or
F and a zero will appear on the display. To adjust both
tone controls and both speaker controls to the middle
position, end out of audio mode by pressing the AUDIO
button until the display goes blank. Then press and hold
AUDIO for more than two seconds until you hear a
beep. CEN will appear on the display.
Radio Messages
CAL (Calibrated): Your audio system has been
calibrated for your vehicle from the factory. If CAL
appears on the display it means that your radio has not
been configured properly for your vehicle and must be
returned to the dealership for service.
LOC (Locked): This message is displayed when the
Theftlock

system has locked up. Your vehicle must
be returned to the dealership for service.
AM FM Stereo with Cassette Tape Player
(If Equipped)
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn this knob clockwise to increase
volume. Turn it counterclockwise to decrease volume.
RCL (Recall): Pressing this knob will display the
station being played or it will display the clock. Clock
display is available with the ignition turned off.

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To adjust balance or fade to the middle position, select
BAL or FAD. Then press and hold AUDIO for more
than two seconds until you hear a beep. L and a zero or
F and a zero will appear on the display. To adjust both
tone controls and both speaker controls to the middle
position, end out of audio mode by pressing the AUDIO
button until the display goes blank. Then press and hold
AUDIO for more than two seconds until you hear a
beep. CEN will appear on the display.
Radio Messages
CAL (Calibration): Your audio system has been
calibrated for your vehicle from the factory. If CAL
appears on the display it means that your radio has not
been configured properly for your vehicle and must be
returned to the dealership for service.
LOC (Locked): This message is displayed when the
Theftlock

system has locked up. Your vehicle must be
returned to the dealership for service.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, but the radio is off, the
tape can be inserted and will begin playing. If you hear
nothing but a garbled sound, the tape may not be in
squarely. Press the eject button to remove the tape and
start over.
While the tape is playing, use the VOL, AUDIO and
SEEK controls just as you do for the radio. The radio
will display UP if the top side of the tape is playing.
DN (Down) will appear if the bottom side is playing.
If you want to insert a tape when the ignition is off,
first press the eject button or the RCL knob.
If an error appears on the display, see ªCassette Tape
Messagesº later in this section.

3-20 AM-FM Stereo with Compact Disc Player
(If Equipped)
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn this knob clockwise to increase
volume. Turn it counterclockwise to decrease volume.
RCL (Recall): Press this knob to display the station
being played or to display the clock. Clock display is
available with the ignition turned off.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 choose radio stations.
SEEK 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 stations, press and hold one of the SEEK arrows
for two seconds until you hear a beep. 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.
To scan preset stations, press and hold one of the SEEK
arrows for more than four seconds until you will hear a
double beep. 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. Press one of the SEEK arrows again to stop
scanning. The channel number (P1
-P6) will appear
momentarily just before the frequency is displayed. The
radio will only scan the six presets in the selected band.
The radio will scan preset stations with a strong signal
only. The sound will mute while scanning.

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Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the right and
left speakers, press and release AUDIO until BAL
appears on the display. Then press and hold the up arrow
to move the sound to the right speakers or the down
arrow to move the sound to the left speakers. R and a
number will appear on the display when the sound is
balanced toward the right speakers. L and a number
will appear on the display when the sound is balanced
toward the left speakers. L and a zero will appear on
the display when the sound is balanced between the
speakers. Release the up or down arrow when you find
the speaker balance you want or when the maximum or
minimum level is reached.
To adjust the fade between the front and rear speakers,
press and release AUDIO until FAD appears on the
display. Then press and hold the up arrow to move the
sound to the front speakers or the down arrow to move
the sound to the rear speakers. F and a number will
appear on the display when the sound is balanced
toward the front speakers. R and a number will appear
on the display when the sound is balanced toward the
rear speakers. F and a zero will appear on the display
when the sound is balanced between the speakers.
Release the up or down arrow when you find the speaker
balance you want or when the maximum or minimum
level is reached.To adjust balance or fade to the middle position, select
BAL or FAD. Then press and hold AUDIO for more
than two seconds until you hear a beep. L and a zero or
F and a zero will appear on the display. To adjust both
tone controls and both speaker controls to the middle
position, end out of audio mode by pressing the AUDIO
button until the display goes blank. Then press and hold
AUDIO for more than two seconds until you hear a
beep. CEN will appear on the display.
Radio Messages
CAL (Calibrated): Your audio system has been
calibrated for your vehicle from the factory. If CAL
appears on the display it means that your radio has not
been configured properly for your vehicle and must be
returned to the dealership for service.
LOC (Locked): This message is displayed when the
Theftlock

system has locked up. Your vehicle must be
returned to the dealership for service.
Playing a Compact Disc
Insert a disc partway into the slot, label side up. The player
will pull it in. The disc should begin playing. The display
will show CD. If you want to insert a compact disc with
the ignition off, first press RCL or the eject button.
If an error appears on the display, see ªCompact Disc
Messagesº later in this section.

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Compact Disc Messages
If the disc comes out, it could be for one of the
following reasons:

If you're driving on a very rough road. When the
road becomes smooth the disc should play.

If it's very hot. When the temperature returns to
normal, the disc should play.

The disc is upside down.

It is dirty, scratched or wet.

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

If the CD is not playing correctly, for any of the
above reasons, try a known good CD.
If any error occurs repeatedly or if an error can't be
corrected, contact your dealer.AM-FM Stereo with Cassette Tape and
Compact Disc Player with Radio Data
System (RDS) and Automatic Tone Control
(If Equipped)
Standard Radio -- Bose not shown
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn this knob clockwise to increase
volume. Turn it counterclockwise to decrease volume.