CHEVROLET SILVERADO 2002 1.G Owners Manual

2-121
Service 4WD (If Equipped)
If the SERVICE 4WD
message comes on, there
may be a problem with the
automatic transfer case and
service is required.
Malfunctions can be indicated by the system before
any problem is apparent, which may prevent serious
damage to the vehicle. This system is also designed
to assist your service technician in correctly diagnosing
a malfunction.
Low Washer Fluid
This message is displayed
when the vehicle is low
on windshield washer
fluid. The message is only
displayed for 15 seconds
at the start of each
ignition cycle.
For more information see, ªWindshield Washer Fluidº in
the Index.

2-122
Cargo Lamp On
This message is displayed
when the cargo lamp is
turned on and the ignition
key is turned to RUN.
Low Fuel
This message is displayed
when your vehicle is
low on fuel.
Refer to the fuel gage for a better indication of the
amount of fuel remaining in the fuel tank.

3-
3-1
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
-2 Standard Comfort Controls
3
-3 Heater and Air Conditioning Comfort
Controls (If Equipped)
3
-5 Electronic Climate Control System
(If Equipped)
3
-9 Air Conditioning
3
-10 Heating
3
-10 Defogging and Defrosting
3
-10 Rear Window Defogger (If Equipped)
3
-11 Ventilation System
3
-13 Audio Systems
3
-13 Setting the Clock for Systems with
SET Button3
-13 Setting the Clock for Systems with HR and
MN Buttons
3
-14 AM-FM Stereo
3
-16 AM-FM Stereo with Compact Disc Player and
Automatic Tone Control (If Equipped)
3
-20 Remote Cassette Tape Player (If Equipped)
3
-22 Theft-Deterrent Feature (If Equipped)
3
-25 Understanding Radio Reception
3
-25 Tips About Your Audio System
3
-26 Care of Your Compact Discs
3
-26 Care of Your Compact Disc Player
3
-26 Fixed Mast Antenna

3-2
Comfort Controls
Standard Comfort Controls
Fan Knob
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.
(Bi-Level): Air is delivered through the floor
outlets as well as the instrument panel outlets. The air
flow can be divided between instrument panel and floor
outlets depending upon where the knob is placed
between the settings.
(Floor): This setting directs most of the air
through the floor outlets, and the rest of the air is
divided between the windshield defroster outlets and
the side window defroster outlets.
(Blend): Airflow is delivered through the floor
outlets, the windshield defroster outlets and the side
window defroster outlets. The air flow can be divided
between floor and defrost depending upon where the
knob is placed between the settings.
(Defrost): This setting directs most air through
the windshield defroster outlets, side window defroster
outlets and some through the floor outlets.

3-3 Heater and Air Conditioning Comfort
Controls (If Equipped)
Fan Knob
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 panel and floor depending on
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.
(Floor): This setting directs most of the
warmed air through the floor outlets and center floor
console outlets (if equipped), as well as some
air through the windshield defroster outlets and side
window defroster outlets. If air from the center floor
console outlets is not desired, turn the vents off at
the console.

3-4
(Blend): Airflow is delivered through the floor
outlets, center floor console outlets (if equipped), the
windshield defroster outlets and the side window
defroster outlets. The air conditioning compressor may
run to dehumidify the air to prevent window fogging.
(Defrost): This setting directs most of the air
through the windshield defroster outlets, side window
defroster outlets and some air through the floor and
center floor console outlets (if equipped). If air from the
center floor console is not desired, or more defroster
performance is desired, turn the vents off at the
console. When in defrost mode, the air conditioning
compressor may run to dehumidifying the air and limit
window fogging.
(Outside Air): Press this button to direct the
system to use outside air.
Pressing the outside air button will cancel the
recirculation button.
(Recirculation): Press this button to limit the
amount of outside air entering the vehicle. This is
helpful when you are trying to limit odors entering the
vehicle or attempting to quickly cool down the interior.
Pressing recirculation will recirculate air continuously.
Recirculation is used when the fan is OFF to limit odors,
outside air and dust from entering your vehicle. All
button lights will go off. The last setting selected will
activate when the fan is turned back on.
Pressing the recirculation button will cancel the outside
air button. To return to normal operation and to prevent
stale air, be sure to return to outside air.
If the mode knob is placed between floor and blend
mode, outside air is forced to reduce window fogging.
If the recirculation button is pressed, the LED indicator
will flash three times indicating that forced outside air is
activated and recirculation is not available.

3-5
The auto recirculation feature will activate when the
following are true:

The air conditioning system is activated,

the outside air button is on, and

the vehicle load is high due to city traffic, extended
idling or hot weather.
The system will automatically switch to the recirculation
mode to lower the system load and improve interior
comfort. The outside air and recirculation button LEDs
will not change. The system will return to the outside air
function when the system load is reduced.
A/C (Air Conditioning): Press this button to turn
the air conditioning on and off. The system will cool and
dehumidify the air inside the vehicle when the A/C light
is on.
Air conditioning will be automatically disabled when
the outside temperature drops below a level at which
air conditioning is effective.
Electronic Climate Control System
(If Equipped)
Fan Control
The knob on the left side of the electronic climate
control panel operates 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.

3-6
AUTO: If the knob is in AUTO, the fan speed will vary
as the system maintains the selected temperature.
When both the fan control and mode knobs are in the
AUTO position, the system will then automatically
maintain the last selected temperature setting. Manual
control of functions 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 setting.
Move the knob clockwise toward 82
F (28
C) for
warmer air. Move the knob counterclockwise toward
66
F (19
C) 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 the fan knob is set to.
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 the fan knob is set to.
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
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): Air is delivered through the floor
outlets as well as the instrument panel outlets.
(Floor): This setting directs most of the air
through the floor outlets and some air through the
windshield defroster outlets.

3-7
(Blend): Airflow is divided equally between the
floor outlet and the windshield defroster outlets. The air
conditioning compressor may run to dehumidify the air
to prevent window fogging.
(Defrost): This setting directs most of the air
through the windshield defroster outlets with airflow
also delivered from the side window and the floor
outlets. When in defrost mode, the air conditioning
compressor may run to dehumidify the air and limit
window fogging.
(Outside Air): Press this button to force the
system to use outside air. Press it again to close off the
outside air.
Pressing the outside air button will cancel the
recirculation button.
(Recirculation): Press this button to limit the
amount of outside air entering your vehicle. This is
helpful when you are trying to limit odors entering your
vehicle or attempting to quickly cool down the interior.
In the AUTO mode, the system will use recirculation as
necessary to cool the air. Pressing the recirculation
button will change the operation to a manual mode and
the air will recirculate non
-stop. Press this button again
to turn off the recirculation feature.
Recirculation may be selected with the fan control in
OFF to limit odors, outside air and dust from entering
your vehicle.
Pressing the recirculation button will cancel the outside
air button.
A/C: Press this button to turn the air conditioning
on and off. The system will cool and dehumidify the air
inside the vehicle when the A/C light is on. When in
AUTO, the A/C is automatically engaged when necessary.
Air conditioning will be automatically disabled when
the outside air temperature drops below a level at which
air conditioning is effective.
Remember that in order for the automatic system to perform
well, it needs A/C to provide cooling performance.

3-8
Mode Knob -- Automatic Operation
The right knob on the control panel allows you to
choose the direction of air delivery. When the system is
set for automatic operation, sensors will control the air
delivery mode. Air will come primarily from the floor or
instrument panel outlets, with some air directed to the
windshield to prevent fogging.
When the system is in AUTO mode, the air conditioning
light will turn on, and the recirculation and outside air
lights turn off. With the system in full auto control
(both the fan and mode knobs in AUTO), you still
have the ability to override any function. However,
continually overriding the outside air or the A/C
compressor will limit the ability of the system to
cool the vehicle quickly.
If you push a button for a function which is not
available, the light next to that button will flash
three times to alert you that it's not available.
To find your comfort zone, start with the 74
F (23
C)
setting and allow about 20 minutes for the system to
adjust the temperature if necessary.With the automatic setting, the air conditioning
compressor automatically cycles when needed to cool
the air. In cold weather, when the system senses the need
for heat, the airflow will be directed out of the floor
outlets. As the interior temperature approaches a desired
setting, the fan speed will decrease. To maintain interior
comfort, the airflow will adjust between the instrument
panel outlets and floor outlets. On bright sunny days in
cool weather, the airflow may come out of the air
conditioning and floor outlets (bi
-level mode) to
maintain comfort and prevent stuffiness.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on the outside air
temperature, engine coolant temperature or the time
since the engine was last started. As the coolant warms
up, the fan speed will gradually increase and air will
flow from the floor outlets, with some airflow to
the windshield to prevent fogging under most
normal conditions.
Be careful not to put anything over the solar sensor
located around the center of the instrument panel.
This sensor is used by the automatic system to
regulate temperature.