heater GMC SIERRA 1993 Owners Manual

When your engine is cold, let it run for a few minutes before you move your
vehicle. This lets oil pressure build up. Your engine will sound louder when
it's cold.
NOTIP
-
If you're not in an idling vehicle and the engine overheats, you wouldn't
there to see the coolant temperature gage. This could damage your
hicle. Don't let vour enaine run when you're not
in vour vehicle.
Cold Weather Starting (Diesel Engine)
The following tips will help you get good starting in cold weather.
Use
SAE IOW-30 oil when the outside temperature drops below freezing.
When the outside temperature drops below
0°F (-18"C), use your engine
block heater.
If you park your vehicle in a garage, you shouldn't need to use \
the block
heater until the garage temperature goes below
0°F (-18"C), no matter how
cold it is outside.
To use the engine block heater, first turn
off the engine. Then open the hood,
unwrap the electrical cord and plug it in. It uses normal house voltage
(110
volts), but:
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CAUTION
Plugging the cord into an ungrounded outlet could cause an ele\
ctrical
shock.
Also, the wrong kind of extension cord could overheat and
cause a fire. You could be seriously injured. Plug the cord into a
properly grounded three-prong
11 0-volt outlet. If the cord won’t reach,
use a heavy-duty three-prong extension cord rated for at least \
15
amps.
1 NOTICE
1 After you’ve used the block heater, be sure to store the cord in th~~~~
manner it was, to help keep it away from moving engine parts.\

If YOU
don’t, it could be torn and damaged.
~p@&%?yl~
How long should you keep tne MOCK neater plugged in? The answer depends
on the weather, the kind
of oil ,you have, and some other things. Follow this-
chart.
,.
ENGINE BLOCK HEATER USAGE”
Viscosity . 32’ $0 0°F ’ 0’ to -10°F ‘Belaw -1 0°F
Grade Oil (0” to &I S‘C) ’ ’ (-18’ to. -23°C) (B&w -23°C)
SAE Not Two Eight Hours
I OW-30 Required Hours or Overnight
SAE . Nit ’ . Two Eight Hours
15W-40 f3equired Hours or Overnight
..
* The times listed are minimum. times. It will not harm &her
the block heater
TO1 57
or the vehicle to leave it plugged in longer than the times stated. 3
For best results in cold weather, use Number I-D diesel fuel or a “winterized”
Number
2-D fuel.
If Your Diesel Engine Won’t- Start
If you’ve run out of fuel, look -at “Running Out Of Fuel” (see ‘‘Diesel Fuel
Requirements and Fuel System”
m the Index).
If you’re not out of fuel, and your engine won’t start, do this:
Turn y6ur ignition key
to Run. .Make sure that the GLOW PLUGS light is out.
Then turn
the ignition key to Stkrt while you ‘push the accelerator pedal
down.
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. If the light. doesn’t go off, wait a few seconds, then try staiting your engine
again. And, see your dealer
as soon as you- can for a starting system check.
If the light comes on and then goes out and you know your batte\
ries are
charged, but your engine still won’t start, your vehicle nee\
ds service.
If your batteries don’t have enough .charge to start ,your engine, see “Battery”
in the Index.
Be sure you have the right oil for your engine, and that you’ve changed the
oil
at the proper times. If you use the wrong oil, your engine may be harder
to start.
If the engine starts, runs a short time, then stops, your vehicle needs service.
NOTICE
Don’t use starting “aids” such as ether or gasoline, in the m~v intakc They
could damage your engine.
..- - .- * K2214
In very cold weather, 0°F (-18°C) or colder, if you have an engine block
heater, it can help. You’ll get easier starting and better fuel economy during
engine warm-up.
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Features & Controls
To use the block heater:
1.
Turn off the engine.
2. Open the hood and unwrap the electrical cord.
3. Plug it into a normal, grounded 110-volt outlet.
Plugging the cord into an ungrounded outlet could cause an electrical
- shock. Also, the wrong extension cord could overheat and cause a
fire. You could be seriously injured. Plug the cord into a properly
grounded three-prong 110-volt outlet.
If the cord won’t reach, use a
! heavy-duty three-prong extension cord rated for at least 15 amps.
After you’ve used the block heater, be sure
to store the cord in the
manner it was, to help keep it away from moving engine parts. If
you
don’t, it could be torn and damaged.
How long should you keep the block heater plugged in? The ans\
wer depends
on the weather, the kind of oil you have, and some other thi\
ngs. Instead of
trying to list everything here, we ask that you contact a Gen\
eral Motors
dealer in the area where you’ll be parking your vehicle. Th\
e dealer can give
you the best advice for that particular area.
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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
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Comfort Controls & Audio Systems
Comfort Control System
Flow-Through Ventilation System
K2302
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, through the vehicle and out \
the rear air exhaust
valves. Outside air will also enter the vehicle when the heate\
r or the air
conditioning fan is running.
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 wind\
ows.
When you enter a vehicle in cold weather, turn the blower fan to
HI for
a few moments before driving
off. This helps clear the intake ducts of
snow and moisture, and reduces the chance of fogging the insid\
e of
your windows.
Keep the air path under the front seats clear of objects. This helps air
to circulate throughout your vehicle.
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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.
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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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Right Button
Defrost (Top): Press here to operate the defroster. Heated air comes out
near the windshield. You can use it to help clear fog or ice on your
windshield.
Heater (Bottom): Press here, and heated air comes out near the floor. This
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.
Left Button
Vent (Top): Press the top of this button and all of the airflow will come
through the instrument panel vents.
Heater (Bottom): Press the bottom of this button and all of the airflow will
come through the floor outlet.
The air flow can be blended between the two positions.
To blend between
positions, press the side
of the switch 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.
Temperature Selector Bar
The bar under your system display lets you select the temperat\
ure of the air
coming into 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 an arrow moving between
C and H.
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
(t) 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.
Air Recirculation Button
If you press the MAX button (RECIR on some models), 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.
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