CHEVROLET C/K 2003 Owners Manual

3-2
Comfort Controls
This section tells you how to make your air system work
for you.
With these systems, you can control the heating, cooling
and ventilation in your vehicle.
Heater Controls
If your vehicle does not have air conditioning, the
control panel will look like this.
Fan Knob
The knob on the left side of the control panel regulates
the fan speed. The knob has four speeds. To increase
airflow, turn the knob clockwise. To decrease airflow,
turn it counterclockwise. To turn the fan off, turn the
mode knob on the far right all the way
counterclockwise.Temperature Knob
The middle knob on the control panel is used to adjust
the temperature of the air flowing into the passenger
area of your vehicle.
Turn the knob toward the red area for warmer air. Turn
the knob toward the blue area for cooler air.
Mode Knob
The knob on the right side of the control panel is used to
select the direction of the air flowing into the vehicle.
(Vent): This setting directs air through the
instrument panel vents.
(Bi-Level): This setting divides airflow between
the floor vents and instrument panel vents.
(Floor): This setting directs air through the
floor vents.
(Defog): This setting divides airflow between the
floor vents and windshield.
(Defrost): This setting directs air through the
windshield vents. This setting is used to remove fog or
ice from the windshield.

3-3 Heater/Air Conditioning Controls
(If Equipped)
If your vehicle has air conditioning, the heater/air
conditioning control panel will look like this.
Fan Knob
The knob on the left side of the control panel regulates
the fan speed. It has four speeds.
To increase airflow, turn the knob clockwise. To
decrease airflow, turn it counterclockwise. To turn the
fan off, turn the mode knob on the far right all the way
counterclockwise.Temperature Knob
The middle knob on the control panel is used to adjust
the temperature of the air flowing into the passenger
compartment of your vehicle.
Turn the knob toward the red area for warmer air.
Turn the knob toward the blue area for cooler air.
Mode Knob
The knob on the right side of the control panel is used to
select the direction of the air flowing into the vehicle.
(Maximum Air Conditioning): Turn the right
knob to maximum air conditioning 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 cools the air the fastest. After the vehicle's
interior reaches a comfortable temperature, turn the
knob clockwise to place the air conditioning system in
the regular air conditioning mode.
(Air Conditioning): This setting is used for
normal cooling on hot days. It cools outside air and
directs it through the instrument panel vents.

3-4
(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.
(Defog): This setting divides airflow between the
floor vents and windshield vents.
(Defrost): This setting directs air through the
windshield vents. This setting is used to remove fog or
ice from the windshield.
Air Conditioning (If Equipped)
Before using the air conditioning, open the windows to
clear the vehicle of hot air. This reduces the time it takes
for your vehicle to cool down. Then keep your windows
closed for the air conditioner to work at its best.You can use maximum air conditioning with the
temperature knob in the blue area when it's really hot
outside and you need to cool the inside air quickly.
Maximum air conditioning lets in only a little air from
the outside.
If you first use maximum air conditioning, you can then
use regular air conditioning with the temperature knob
in the blue area, as soon as the vehicle has cooled down,
so outside air will be going through your vehicle.
While in maximum air conditioning, regular air
conditioning, bi
-level air conditioning, defog or defrost
mode, you may notice a slight increase or decrease in
engine speed, due to compressor operation. This is
normal because the system is designed to cycle the
compressor on and off to maintain the desired
temperature.
Heating
On cold days, use floor with the temperature knob in the
red area. Outside air will be brought in, heated and
distributed through the floor vents. The heater works
best if you keep your windows closed while using it.
If you use the optional engine coolant heater before
starting your engine, your heating system will produce
warmer air faster to heat the passenger compartment in
cold weather. See ªEngine Coolant Heaterº in the Index.

3-5 Defogging and Defrosting
Turn the mode knob to defrost to remove fog or ice from
the windshield quickly in extremely cold conditions.
The temperature knob should be in the red area with the
fan knob toward high.
To keep the windshield clear and send heated air
through the floor vents, turn the mode knob to defog.
The air conditioning compressor may operate in this
setting to dehumidify the air.
Rear Window Defogger (If Equipped)
If you see lines running across the rear windows, you
have a rear window defogger. The lines warm the glass.
For best results, clear the windows of as much snow or
ice as possible before using the rear window defogger.
To turn on the rear window
defogger, press this button
located near the fan control.
An indicator light in the
button will come on when
the rear window defogger
is working.The rear window defogger will only work when the
ignition is in RUN.
The rear window defogger will turn itself off after
several minutes. If you need additional warming time,
press the button again. Pressing the button when the
indicator light is illuminated will turn the defogger off.
NOTICE:
Don't use a razor blade or something else sharp
on the inside of the rear window. If you do, you
could cut or damage the warming grid, and the
repairs wouldn't be covered by your warranty.
Do not attach a temporary vehicle license, tape or decals
across the defogger grid on the rear windows. Use care
not to damage the wiring bands that connect the rear
window defogger grid when operating the rear
swing
-out windows (if equipped).

3-6 Rear Heater (If Equipped)
If your vehicle has a rear
heater, the thumbwheel
for this feature is located
on the headliner.
To increase and decrease the flow of heated air to the
rear floor vents, turn the thumbwheel to the desired
fan speed.
To increase the flow of heated air, turn the thumbwheel
up. To turn the fan off, turn the thumbwheel down.
Ventilation System
For mild outside temperatures when little heating or
cooling is needed, turn the mode knob to vent to direct
outside air through your vehicle. Air will flow through
the instrument panel vents.Your vehicle's flow
-through 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 at the base of the windshield,
through the vehicle and out the rear air exhaust valve.
Outside air will also enter the vehicle when the heater or
the air conditioning compressor is running.
Your vehicle has air vents
near the center and on the
sides of the instrument
panel that allow you to
adjust the direction and the
amount of airflow inside
the vehicle.
Move the thumbwheel on the vent up or down to direct
the airflow. Increase or reduce the amount of airflow by
opening and closing the louvers. The vents can be
moved side
-to-side to direct the airflow.
When you close a vent, it will increase the flow of air
coming out of any vents that are open.

3-7
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 high 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.Audio Systems
Your audio system has been designed to operate easily
and to 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 Time
Press and hold the HR or MIN arrow for two seconds.
Then press the HR (down) arrow until the correct hour
appears on the display. Press and hold the MIN (up)
arrow until the correct minute appears on the display.
The time may be set with the ignition on or off.

3-8 AM-FM Radio
Playing the Radio
PWR (Power): Press this knob to turn the system on
and off.
VOL (Volume): Turn the knob to increase or to
decrease volume.
RCL (Recall): Press this knob to switch the display
between time and radio station frequency. Time 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 will show your selection.
TUNE: Turn this knob to tune in radio stations.
SEEK : Press the right or the left arrow to seek to
the next or to the previous station and stay there.
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 presets.
To scan preset stations, press and hold one of the SEEK
arrows for more than four seconds until you hear
two beeps. The radio will go to the first preset station
stored on the 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 presets.
This radio will seek and scan only to stations that are in
the selected band and only to those with a strong signal.

3-9
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 and hold one of the six numbered pushbuttons
until you hear a beep. Whenever you press that
numbered pushbutton, the station you set will return.
5. Repeat the steps for each pushbutton.Setting the Tone (Bass/Treble)
AUDIO: To adjust bass and treble, press and release
AUDIO repeatedly until BAS or TRE appears on the
display. Then press and hold the up or the down arrow to
increase or to decrease. If a station is weak or noisy, you
may want to decrease the treble.
To adjust bass or treble to the middle position, select
BAS or TRE. Then press and hold AUDIO for more
than two seconds until you hear a beep. B and a zero or
T 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 by waiting for the
display to change to the time display. Then press and
hold AUDIO for more than two seconds until you hear a
beep. CEN will appear on the display.

3-10
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the right and
the left speakers, press and release AUDIO until BAL
appears on the display. Then press and hold the up or
the down arrow to move the sound toward the right or
the left speakers.
To adjust the fade between the front and the rear
speakers, press and release AUDIO until FAD appears
on the display. Then press and hold the up or the
down arrow to move the sound toward the front or
the rear speakers.
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 by waiting for the
display to change to the time display. Then press and
hold AUDIO for more than two seconds until you hear a
beep. CEN will appear on the display.
Fade may not be available if you have a regular
cab model.
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.

3-11 AM FM Radio 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 to increase or to
decrease volume.
RCL (Recall): Press this knob to switch the display
between time and radio station frequency. Time 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 will show your selection.
TUNE: Turn this knob to choose radio stations.
SEEK : Press the right or the left arrow to seek to
the next or to the previous station and stay there.
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 presets.
To scan preset stations, press and hold one of the SEEK
arrows for more than four seconds until you hear
two beeps. The radio will go to the first preset station
stored on the 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 presets.
The radio will seek and scan only to stations that are in
the selected band and only to those with a strong signal.