CHEVROLET SUBURBAN 1994 Owners Manual

Heater Output
Engine Coolant Heater
If your vehicle has a diesel engine, it is equipped with an engine coolant
heater. An engine coolant heater
is optional on gas engine vehicles. You can
use an engine coolant heater during initial start-up
in cold weather (20” F,
-8” C, or lower) to help heat the passenger compartment faster. Because an
engine coolant heater warms the engine coolant, your vehicle’s heating
system can provide some heat as soon as you start the engine.
The use
of an engine coolant heater also reduces the time it takes for the
engine to reach normal operating temperature, and shortens the time it takes
the heater
to reach full output. For more information, See “Engine Coolant
Heater” in the Index.
Diesel Engine
If you idle your diesel engine for a long time when it’s cold outside, your
heater may blow out cool air. This is normal. When you increase the engine
speed, your heater should blow
out warmer air. If it doesn’t, your coolant
level may be low. See “Engine Coolant”
in the Index to find out how to
check your coolant level.
Heating System (Without Air Conditioning)
If your vehicle does not have air conditioning, this is what your heating
system will look like.
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Function Lever
The upper lever on the control panel can be moved to three different heating
functions.
0 Vent (Left): Air comes out at the vents on your instrument panel and at
your front side windows.
a heat setting, is best for cold weather.
0 Defrost (Right): This setting operates the defroster. Air comes out near
the bottom of the windshield and at your front side windows. Use this
setting, along with
a heat setting, when you get fog or ice on the
windshield.
0 Heater (Center): Air comes out near the floor. This setting, along with
Placing the lever between positions sends air out both vents.
Temperature Lever
The lower lever on the control panel lets you select the temperature of the
air flowing into the passenger area
of your vehicle. Move the lever right
toward
(+) for warmer air. Move the lever left toward (-) for cooler air.
Fan Control Knob
The knob on the right side of the heating system control panel controls the
fan speed. The knob has four speed positions. To increase the air flow, turn
the knob toward (+). To decrease the air flow, turn it toward (-).
Electronic Heating/Air Conditioning System
If your vehicle has air conditioning, your heating/air conditioning system
will
look like this.
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When you first turn on your vehicle’s air conditioning, open the windows to
clear the vehicle
of hot air. Using the MAX button can also help. See
“MAX Button” in this section for more information.
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Function Display
Your system has a lighted display showing each system when it is operating.
During normal operation, all the lights won’t come on
at the same time.
Only the ones displaying the current settings will light.
Temperature Selector Bar
The bar under your system display lets you select the temperature of the air
flowing into the passenger area
of your vehicle. Press COLD for cooler air
and press HOT for warmer air. Release the bar when the system reaches the
temperature you want. The temperature is shown on the display by the
arrow moving between
C and H.
Air Controls (8L END)
The two buttons to the right of the system display control the air flow. You
can blend
the air flow to suit your needs. The amount of blending is shown
on the display by an arrow moving between the figure’s feet (floor air flow)
and head (vent air flow).
Left Button
Vent (Top) : Press the top of this button and the air flow will come through
the instrument panel vents.
Heater (Bottom) : Press the bottom of this button and the air flow will
come through the floor outlet.
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The air flow can be blended between the two positions. To blend between
positions press the side
of the button showing the area where you would like
more air flow. The system will automatically begin to blend toward the
position chosen.
To stop the system between positions, just press the SAME
side of the button again.
Right Button
Defrost (Top) : This setting operates the defroster. Air comes out near the
bottom of the windshield and at your front side windows. Use this setting,
along with a heat setting, when you get fog or ice on the windshield.
Heater (Bottom) : Press the bottom of this button and air comes out near
the floor. This setting, along
with a heat setting, is best for passenger
comfort in cold weather.
The air flow can be blended between the two positions.
To blend between
positions press the side of the button showing the area where
you would like
more air
flow. The system will automatically begin to blend toward the
position chosen. To stop the system between positions, just press
the SAME
side of the button again.
A/C Button
Press the button marked A/C to turn your air conditioner on and off. The
A/C symbol will light on your display and air will come out of your
instrument panel vents. The fan will automatically be set on
LOW .
When you press the A/C button to turn the air conditioner off, the system
will operate in the vent mode. When you turn the air conditioner back
on,
the system will operate in the mode that you last selected unless the OFF
button was pressed.
MAX Button
If you press the MAX button, the air in your vehicle will be recirculated.
With the air conditioner on,
MAX will give you maximum cooling. It can
also be used
in all modes to help keep dust out of your vehicle. When MAX
is selected, REC will light on your display.
If your air conditioner develops high system pressure, it will automatically
go into the
MAX mode and REC will light on your display. The A/C
system will remain in the MAX mode, even if you press the MAX button,
until system pressure returns to a normal level.
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Fan Control Button
This button is in the upper right corner of your system control panel. The
fan has four settings
- low, medium low, medium high and high. Press the
top
of the button (+) to increase the air flow. Press the bottom of the button
(-) to decrease the air flow. The setting you select is shown on your display
as
LOW, MED LOW, MED HI or HI.
OFF Button
Press this button to turn the air conditioningheating system off. Pressing
OFF will erase the present mode of operation from the system’s \
memory,
Outside air will still come out of the heater outlet whenever the vehicle
is
moving forward.
If the OFF button was pressed, you must press A/C, MAX, or one of the
BLEND buttons for the system to come back on.
Rear Air Conditioning and Heating Systems (Wagon
Models)
If your vehicle has either or both of these systems, you can increase and
decrease the air flow at the rear vents. Depending
on the system you have
and the setting selected, you can send cooled
or heated air to the rear of the
vehicle.
Rear Air Conditioning (Without Rear Heater)
If your vehicle has rear air conditioning (without rear heater), the controls \
are located above the front and second seats.
The front and rear overhead
controls let
you increase and decrease the air flow at the rear vents.
Front Control Rear Control
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F
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To operate the rear air conditioning system, the front air conditioning
system must be
on. With the front air conditioning system off, the rear
system controls can be used to circulate air in the rear of the vehicle.
To operate the rear system using the front control, just turn the knob to the
blower position you want.
To use the rear control, first turn the front control knob to REAR CNTL.
Then, the rear control can be used to increase and decrease the air flow.
Rear Heater (Without Rear Air Conditioning)
If you have a rear
heater (without rear
air conditioning), the
control switch
is
located on the
instrument panel.
To increase and decrease the flow of heated air to the rear floor vents, move
the switch with the fan symbol
on it to the blower speed you want.
Move the switch all the way to the left position to turn the rear blower off,
and
each position to the right increases the flow of heated air.
Move
the switch all the way to the right position to turn the blower on high,
providing maximum flow of heated air.
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Rear Air Conditioning and Rear Heater
If your vehicle has a rear air conditioning and rear heater system
combination, controls are provided to regulate the temperature, location and
speed
of the air flow.
Front Control Rear Control
1
To adjust the air temperature, turn the temperature knob on the right side of
the control panel. For warmer air, turn the knob to the right (red) side, and
for cooler air, turn the knob to the left (blue) side.
To regulate the air flow location, adjust the center knob on the control panel.
Turn the knob toward the left for tloor vent air flow or toward the right for
headliner
vent air flow. Generally, the upper vents are used for air '
conditioning and the floor vents for heating: However, the control knob may
be set
to allow any desired blend of air flow.
To adjust the air flow speed, turn the fan control knob on the left side of the
control panel to the desired blower setting.
To activate the rear control, move the fan knob on the front control to
REAR CNTL. This will allow second seat passengers to adjust the controls
as they desire.
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Rear Window Defogger
You can tell if your vehicle has this option by looking at the rear window. If
you see lines running across the glass, you have it. These are the wire-like
elements which heat your window.
1 NOTICE:
Scraping the inside of your rear window could cut and damage
the defogger. Your warranty would
not cover this damage. And,
don't
put decals there, you might have to scrape them off.
For best results, clear the window of as much snow or ice as possible first.
To turn on the rear
window defogger, find
the switch marked
REAR DEFOG on
your instrument panel,
just below the heater
system.
Press the right side of
the switch, with the defog symbol on it, until the light
in the switch comes on, then release it.
The rear window defogger will only work if the ignition switch is turned to
RUN.
You can turn the defogger off at any time by pressing the left, lighted side of
the switch. The defogger will
shut itself off after several minutes, so that the
glass does not get too hot. If the defogger shuts off, and the window still
isn't clear, turn the defogger
on again.
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A udia Systems
Your Delco@ 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 Delco@ system can do
and how to operate all its controls, to be sure you’re getting the most out of
the advanced engineering that went into it.
Be aware that hearing damage from loud noise is almost undetectable until
it is too late. Your hearing can adapt to higher volumes of
sound. Sound that
seems normal can be loud and harmful to your hearing. Take precautions by
adjusting the volume control on your radio to
a safe sound level before your
hearing adapts to it.
To help avoid hearing loss or damage:
0 Adjust the volume control to the lowest setting.
0 Increase volume slowly until you hear comfortably and clearly.
FM Stereo
FM stereo will give you the best sound. But FM signals can only reach
about 10 to
40 miles (16 to 65 km). And, tall buildings or hills can interfere
with FM signals, causing the sound
to come and go.
AM
The range for most AM stations is greater than for FM, especially at night.
The longer range, however, can cause stations to interfere with each other.
AM can pick up noise from things like electrical storms and power lines.
If
the noise interferes with your listening, try reducing the treble to lessen the
noise.
AM Stereo
This means the Delco@ system can receive C-QUAM@ stereo broadcasts.
Many
AM stations around the country use C-QUAM@ to produce stereo,
though some
do not. If your Delco@ system can get C-QUAM@, your
“STEREO” light will come on when you’re receiving it. (C-QUAM@ is a
registered trademark of Motorola, Inc.).
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NOTICE:
Before you add any sound equipment to your vehicle - like a
tape player,
CB radio, mobile telephone or two-way radio - be
sure you can add what you want.
If you can, it’s very important
to do it properly. Added sound equipment may interfere with the
operation of your vehicle’s engine, Delco@ radio or other
systems, and even damage them. And, your vehicle’s systems
may interfere with the operation
of sound equipment that has
been added improperly.
So, before adding sound equipment, check with your dealer and
be sure to check Federal rules covering mobile radio and
telephone units.
How to Operate Your AM ETR Radio
To Play the Radio
Press the PWR-VOL-TONE knob to switch the radio on and off. This
knob does two other things:
It controls the volume. Rotate the VOL knob clockwise to increases the
volume.
The knob behind the PWR-VOL knob is the TONE knob. Rotate this
knob clockwise
for more treble and counterclockwise for more bass.
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