1993 GMC SIERRA air condition

When the engine starts, let go of the key and accelerator ped\
al. Your engine is designed to work with the electronics in your vehicle.
If you 1
add electrical parts or accessories, you could change the way the fuel
injection system operates. Before adding electrical equipment, ch\
eck with
your dealer. If you don’t, your engine might not perform properly.
If you ever have to have your vehicle towed, see the part of this Manu; .
that tells how to do it without damaging your vehicle. See “Towing Your
Vehicle” in the Index.
NOTICE I
If you -drive too quickly through deep puddles or standing water, water can
come
in through your engine’s air intake and badly damage your engin\
e. 1%-
you can’t avoid deep puddles or standing water, drive through very slowlv. I
--
Never drive through standing water more than 8 inches deep if yo~
vehicle has a diesel engine.
Also, don’t drive through any standing water
faster than
5 mph (8 kmh). If you do, water can be drawn in through the
air intake, and this can severely damage your engine.
-
Driving In Snow (Diesel Engines)
When driving in a heavy snowstorm or in swirling snow with a diesel engine,
snow can get into the air intake system.
If you keep driving in these
conditions, the air cleaner may get plugged, causing black smok\
e and
loss of
power. In an emergency,
if the air cleaner is plugged with snow, you can
remove the air cleaner. Then, drive to a place
of safety as soon as possible
and put the air cleaner back on.
Starting Your Diesel Engine
Your diesel .engine starts differently than a gasoline engine.
1. Automatic Transmission:
Move your shift lever to P (Park) or N (Neutral). Your engine won’t start
in any other position-that’s a safety feature.
To restart when you’re
already moving, use
N (Neutral) only.
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Features & Contmls
Four- Wheel Drive
CAUTION I
It can be dangerous to get out of your vehicle if the shift lever -is not
fully in
P (Park) with the parking brake firmly set. Your vehicle can
roll. Don’t leave your vehicle when the engine is running unless you
have
to. If you’ve left the engine running, the vehicle can ‘move
suddenly. You or -others could be injured.
To be sure your vehicle
won’t move, even when you’re on fairly level ground, always
set your
parking brake and move the shift lever
to P (Park).
If you have four-wheel drive and your transfer case is in N (Neutral),
your vehicle
will be free to roll, even if your shift lever is in P’(Park).
So, be sure the transfer case is in a drive gear-not in N (Neutral).
Follow the proper steps
to be suce your vehicle won’t move. See
“Shifting Into
P (Park)” in the Index.
If you are parking on a hill, or if you’re pulling a trailer, also see
“Parking ‘on Hills’’ or “Towing a Trailer” in this section.
I
If your vehicle has four-wheel drive, you can send your engine’\
s driving power
to all four wheels for extra traction. To get the most satisfaction out of
four-wheel drive, you must be familiar with it’s operation. \
Read the part that
follows before using four-wheel drive. You should use
2H for most normal
driving conditions.
Rear-wheel antilock brakes
do not work when you shift into four-wheel drive.
Your regular brakes will still work. When you shift back into two-w\
heel drive,
your rear-wheel antilock brakes will take over again.
I NOTICE
Driving in the 4H or 4L positions for a long time on dry or wet pavement
could shorten the life
of your vehicle’s drivetrain.
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Features & Controls
“Engine Coolant’’ in the Index and have your vehicle s\
erviced as soon as
you can.
Charging System Light
K2328
The red charging system light is located at the upper right hand corner of
your instrument cluster. It should come on briefly when you turn on the
ignition, before starting the engine, as a check to show you it is working.
After the engine starts, the light should
go out. If it stays on, or comes on
while you are driving, you may have a problem with your elect\
rical charging system. It could indicate that you have a loose alternator drive belt, or\
that
you have some other electrical problem. Have it checked right away. Driving
while this light is on could drain your battery.
If you must drive a short distance with the light on, be certain to turn off all
your accessories, such as the radio and air conditioner.
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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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Air Vents
I
I
K2315
You will find air vents in the center and on the sides of your instrument
panel. You can move the vents to direct the flow of air, or close the vents
altogether. When you close a vent, it will increase the flow
of air coming out
of any vents that are open.
If your vehicle does not have air conditioning, there are air ven\
ts below the
instrument panel. Each vent has a handle with a vent symbol o\
n
it. Use the
handle to open and close the vent.
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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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