CHEVROLET C3500 HD 2002 4.G Owners Manual

3-5 Ventilation System
For mild outside temperatures when little heating
or cooling is needed, use vent to direct outside air
through your vehicle. Air will flow through the
instrument panel outlets.
Your vehicle's ventilation system supplies outside
air to the inside of your vehicle when it is moving.
With the side windows closed, air will flow into the
front air inlet grilles, through the vehicle, and out the
air exhaust valves.
Outside air will also enter the vehicle when the heater or
the air conditioning fan is running, unless you have the
recirculation button pushed in. For more information on
the recirculation button, see ªAir Conditioningº earlier
in this section.
Your vehicle has air outlets in the center and on the sides
of your instrument panel. You can move the outlets from
side
-to-side or up and down to direct the flow of air, or
close the outlets altogether. When you close an outlet,
it will increase the flow of air coming out of any outlets
that are open. These outlets do not completely shut off
airflow when in the closed position.

3-6
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.
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.

The use of hood air deflectors may adversely
affect the performance of the heating and air
conditioning system.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 with the
SET Button
Press SET. Within five seconds, press and hold the right
SEEK arrow until the correct minute appears on the
display. Press and hold the left SEEK arrow until the
correct hour appears on the display.
Setting the Clock for Systems with HR
and MN Buttons
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.

3-7 AM-FM Stereo
Playing the Radio
Power: Turn the VOLUME knob clockwise to turn the
system on and counterclockwise to turn the system off.
VOLUME: Turn this knob clockwise to increase
volume. Turn it counterclockwise to decrease volume.
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.Finding a Station
AM
-FM: Press this knob to switch between AM,
FM1 and FM2. The display shows your selection.
TUNE: Turn this knob to tune in radio stations.
SEEK: Press the right or left arrow to seek to
the next or previous station and stay there.
SCAN: Press both SCAN arrows. SCAN will
appear on the display. The radio will scan to the next
station, play for a few seconds, then scan to the next
station. Press the RECALL knob or both SCAN arrows
to stop scanning.
Setting Preset Stations
The four numbered pushbuttons let you return to
your favorite stations. You can set up to 21 stations
(seven AM, seven FM1 and seven 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 SET. SET will appear on the display.

3-8
5. Press one of the four pushbuttons within five seconds.
Whenever you press that numbered pushbutton,
the station you set will return.
6. Repeat the steps for each pushbutton.
In addition to the four stations already set, up to three
more stations may be preset on each band by pressing
two adjoining pushbuttons at the same time and by
performing the following steps:
1. Tune in the desired station.
2. Press SET. SET will appear on the display.
3. Press two adjoining pushbuttons at the same time,
within five seconds. Whenever you press the same
two pushbuttons, the station you set will return.
4. Repeat the steps for each pair of pushbuttons.Setting the Tone (Bass/Treble)
BASS: Slide this lever up or down to increase or
decrease bass.
TREB (Treble): Slide this lever up or down to increase
or decrease treble. If a station is weak or noisy, you may
want to decrease the treble.
Adjusting the Speakers (Balance/Fade)
BAL (Balance): Turn the control ring behind the
upper knob to move the sound to the left or right
speakers. The middle position balances the sound
between the speakers.
FADE: Turn the control ring behind the lower knob to
move the sound to the front or rear speakers. The middle
position balances the sound between the speakers.

3-9 AM-FM Stereo with Cassette Tape Player
(If Equipped)
Playing the Radio
Power: Turn the VOLUME knob to turn the system
on and off.
VOLUME: Turn this knob clockwise to increase
volume. Turn it counterclockwise to decrease volume.
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 knob to switch between AM,
FM1 and FM2.
TUNE: Turn this knob to tune in radio stations.
 SEEK
: Press the right or left arrow to seek
to the next or previous station and stay there.
PSCAN: To scan preset stations, press both SEEK
buttons. The radio will go to the first preset station
stored on the pushbutton, play for a few seconds,
then go on to the next preset station. Press either
SEEK button or RECALL to stop scanning through
the preset stations.
Setting Preset Stations
The four numbered pushbuttons let you return to
your favorite stations. You can set up to 21 stations
(seven AM, seven FM1 and seven 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 SET. SET will appear on the display.

3-10
5. Press one of the four pushbuttons within five seconds.
Whenever you press that numbered pushbutton,
the station you set will return.
6. Repeat the steps for each pushbutton.
In addition to the four stations already set, up to three
more stations may be preset on each band by pressing
two adjoining pushbuttons at the same time and 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 SET. SET will appear on the display.
5. Press two adjoining pushbuttons at the same time,
within five seconds. Whenever you press the same
two pushbuttons, the station you set will return.
6. Repeat the steps for each adjoining pushbuttons.Setting the Tone (Bass/Treble)
BASS: Slide this lever up or down to increase or
decrease bass.
TREB (Treble): Slide this lever up or down to increase
or decrease treble. If a station is weak or noisy, you may
want to decrease the treble.
Adjusting the Speakers (Balance/Fade)
BAL (Balance): Turn the control ring behind the
upper knob to move the sound to the left or right
speakers. The middle position balances the sound
between the speakers.
FADE: Turn the control ring behind the lower knob to
move the sound to the front or rear speakers. The middle
position balances the sound between the speakers.

3-11
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.
Once the tape is playing, use the VOLUME, BAL,
FADE, BASS and TREB controls just as you do for
the radio.
If an error appears on the display, see ªCassette Tape
Messagesº later in this section.
REV (Reverse): Press this button to reverse the cassette
tape. Press the FWD button to stop reversing the tape.
FWD (Forward): Press this button to advance the
cassette tape. Press the REV button to stop forwarding
the tape.
RECALL: Press this knob to switch tape sides.
EJECT: Press this button to stop a tape when it is
playing or to eject a tape when it is not playing.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 on.
3. Insert the adapter into the cassette slot.
4. Within five seconds, press and hold the REV
and FWD buttons at the same time for three
seconds. The tape symbol on the display will flash,
showing that the broken tape detection feature is
no longer active.
This override routine will remain active until EJECT
is pressed.

3-12 AM-FM Stereo with Cassette Tape Player
and Automatic Tone Control (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.
The knob is capable of being turned continuously.RECALL: Pressing this button will display the station
being played or it will display the clock. Clock display
is available with the ignition turned off.
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. Each notch on the
control ring allows for more volume compensation
at faster vehicle speeds. Then, as you drive, SCV
automatically increases the volume, as necessary, to
overcome noise at any 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.
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.

3-13
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
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.