1993 GMC SIERRA heating

Section
0
This section tells you how to use your manual and includes
safety and vehicle damage warnings and symbols.
I
This section tells you how to use your seats and safety belts
properly.
2
This section explains how to start and operate your vehicle.
3
This section tells you how to adjust the ventilation and comfort
controls and how to operate your audio system.
4
Here you’ll find helpful information and tips about the road and
how to drive under different conditions.
5
This section tells you what to do if you have a problem while
driving, such as
a flat tire or engine overheating.
Here the manual tells you how to keep your vehicle running
properly and looking good.
7
This section tells you when to perform vehicle maintenance and
what fluids and lubricants to use.
8
This section tells you how to contact your GM division for
assistance and
how to get service publications. It also gives
vou information on “Reportina Safetv Defects”.
Here’s an alphabetical listing of alr..,st every subject in this
manual. You can use
it to quickly find something you want to
m read. -
V
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Push the right side of the switch with the 0 symbol on it to turn off your
lights.
Turn the dial at the right of the
off switch to adjust interior lights. Turning the
dial
all the way up turns on the interior lights.
You can switch your headlights from high to low beam by pulling o\
n the turn
signal/high beam lever.
A circuit breaker protects your headlights. If you have an electrical overload,
your headlights will flicker on and
off. Have your headlight wiring checked
right away
if this happens.
Headlights-On Reminder
A buzzer will sound when your headlights are turned on and your ignition is
in Off, LOCK or Acc.
Fog Lamps
Use your optional fog lamps for better vision in foggy or misty conditions.
Your fog lamps will operate with your low beam headlights or parking li\
ghts
on,
and go off when the high beam headlamps are on. Switching to low
beam headlights or parking lights will let you use the fog la\
mps again.
The fog lamp switch is on the instrument panel below the heating controls.
Press the side of the switch with the fog lamp symbol on
it to turn the fog
lamps on, and the left side of the switch
to turn them off. A light will glow in
the left side of the switch when they are on.
K2294
Remember, fog lamps alone will not give off as much light as your headlights.
Never use your fog lamps in the dark without turning on your headlights.
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Don't hold a cigarette lighter in with your hand while it is heating. If you
do,
it won't be able to back away from the heating element when it's
To remove the front ashtray, pull on the front of it.
To remove the rear ashtrays, if you have them, press down on the inside
tabs and pull.
Don't put papers and other things that burn into your ashtrays\
.
If you do,
cigarettes or other smoking materials could set them on fire, causing damage.
Your vehicle has a variety
of storage compartments provided for your
convenience.
Stoale Compartments
Glove Box
To open your glove box, press the button down and pull the door open.
Two cup holders are provided for your convenience.
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Features & Controls
Listed are four situations you may experience with your fuel g\
age:
At the gas station, the fuel pump shuts off before the gage reads full.
It takes a little more or less fuel to fill up than the fuel gage indicated.
For example, the gage may have indicated the tank was half fu\
ll, but
it
actually took a little more or less than half the tank's capa\
city to fill the
tank.
The gage moves a little when you turn a corner or speed up. \
The gage doesn't go back to empty when you turn off the ignition.
None of these indicate a problem with the fuel gage.
For information on how to
fill your fuel tank see "Fuel-Filling Your Tank" in
the Index.
For your fuel tank capacity, see "Fuel-Tank Capacity"
in the Index.
Engine Coolant Temperature Gage
760
K2334
This gage shows the engine coolant temperature. If the gage pointer moves
into the red area, about 260°F
(145°C) or more, your engine is too hot! It
means that your engine coolant has overheated.
If you have been operating
your vehicle under normal operating conditions, you should pull \
off the road,
stop your vehicle and turn
off the engine as soon as possible.
Hot Coolant Can Burn You Badly!
In "Problems on the Road", this manual shows what to do. See \
"Engine
Overheating" in the Index.
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Comfort Controls & Audio Systems
Section
?
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 system
supplied with your vehicle.
For explanation of vehicle symbols in this secrlon, reTer to “Vehicle
Symbols” in Section 0.
Comfort Control System ........................................................................\
............... 3-2
Flow-Through Ventilation System
..................................................................... 3-2
Heating System (Without Air Conditioning)
..................................................... 3-4
Heater Output
........................................................................\
............................ 3-5
Electronic Heating/Air Conditioning System ..................................................... 3-5
Rear Window Defogger
........................................................................\
............. 3-8
Audio Systems
........................................................................\
............................... 3-9
FM Stereo ........................................................................\
.................................. 3-9
AM
....... . ... . . . . . , .. . . . . . . . . . . .. ... .. .. . . . . . . .. . . . . . ... . .. .. . .. ,. . . . . , . . , . . . . .. . . .. ... .. .. . . . . . . , . . . . ... . . . .... . .. . . . . . .3-9
AM Stereo
............................................. ........................................................... 3-1 0
How to Operate Your AM ETR@Radio ......................................................... 3-10
How to Operate Your AM-FM Stereo Audio System
and Cassette Deck
.II..I.I..I.I...................................I...........I...........\
.............. 3-11
How to Operate Your AM-FM Stereo Audio System
and Cassette Deck with Equalizer
.............,.,.,...................,........................... 3-14
Care of Your Cassette Tape Player
............................................................... 3-18
Fixed Mast Antenna
.................................. ...................................................... 3-1 8
3-1
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Comfort Conhvls & Audio Systems
Heating System (Without Air Conditioning)
K2441
If your vehicle does not have air conditioning, this is what your heat\
ing
system will
look like.
Fan Knob
The knob on the right has four positions. To increase the air flow, turn it
toward
(t). To decrease the air flow, turn it toward (-).
Temperature Lever
The bottom lever lets you select the temperature of the air flowing into your
vehicle. Move the lever right toward
(t) for warmer air. Move the lever left
toward
(-) for cooler air.
Function Lever
The top lever can be moved to three different heating function\
s.
Defrost (Right): This setting operates the defroster. Heated air comes out
near the windshield. Use this when you get fog
or ice on the windshield.
Heater (Center): Heated air comes out near the floor. This is best for cold
weather.
Vent (Left): The air comes out at the vents on your instrument panel and
at your front side windows.
Placing the lever between positions sends air out both vents.
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Heater Output
Optional Engine Block Heater
If your engine is equipped with an optional engine block heater, you can use
it during initial start-up in cold weather (20”F,
-8”C, or lower) to help heat the
passenger compartment faster. Because an engine block heater war\
ms the
engine coolant, your vehicle’s heating system can provide som\
e heat as soon
as you start the engine.
The use
of an engine block 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 Block
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.
Electronic HeatingAir Conditioning System
Function Display
K2305
If your vehicle has air conditioning, your heating/air conditioning \
system will
look like this.
3-5
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Comfort Controls & Audio Systems
When you first turn on your vehicle’s air conditioning, open\
the windows to
clear the vehicle of hot air.
K2313
Your system has a lighted display showing each system when it is operating.
During normal operation, all the lights won’t come on at th\
e same time. Only
the ones displaying the current settings will light.
System Controls
NC Button: Press the button marked NC to turn your air conditioner on and
off. The NC symbol will light on your display and air will come out of y\
our
dashboard vents. The fan will automatically be set on
LOW.
When you press the NC 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.
OFF Button: Press this button to turn the air conditioninglheating \
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 NC, MAX (RECIR on some
models), or one of the
BLEND buttons for the system to come back on.
Air Controls (BLEND)
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).
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