four wheel drive GMC SIERRA 1994 Owners Manual

EngineExhaust ........................................... 2-33
Running
Your Engine While You’re Parked ................... 2-33
Four-WheelDrive
......................................... 2-34
Transfer Case
.......................................... 2-35
Front Axle Locking Feature
............................... 2-36
Windows
................................................ 2-37
Horn
.................................................... 2-39
TiltWheel
............................................... 2-39
Multifunction Lever
........................................ 2-40
Turn Signal and Lane Change Indicator
...................... 2-40
Headlight High-Low Beam
............................... 2-41
Windshield Wipers
...................................... 2-42
Windshield Washer
...................................... 2-43
Cruise Control
.......................................... 2-44
Headlights and Vehicle Lighting
.............................. 2-49
Mirrors
.................................................. 2-54
SunVisors
............................................... 2-55
Cigarette LightedAshtrays ................................... 2-57
Storage Compartments
...................................... 2-58
Instrument Cluster
......................................... 2-67
Warning Lights and Indicators
............................. 2-69
Gages
................................................ 2-78
Center High-Mount Stop Lamp (CHMSL) Feed Wire ............. 2-82
Camper Wiring Harness
..................................... 2-83
Step Bumper Pad
.......................................... 2-84
Trailer Wiring Harness
...................................... 2-83
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R (Reverse) - To back up, first press down the clutch pedal. Wait
3-5 seconds for the internal parts to stop spinning and then, shift into
“R.” Let up on the clutch pedal slowly while pressing the accelerator
pedal.
NOTICE:
Shift to “R” (Reverse) only after your vehicle is stopped.
Shifting to
LLR” (Reverse) while your vehicle is moving could
damage your transmission.
Also, use Reverse, along with the parking brake, when turning off your
engine and parking your vehicle.
Shift Light
If you have a manual
transmission,
you may
have
a SHIFT light.
This light will show
you when
to shift to
the next higher gear
l for best fuel economy.
I
When this light comes on, you can shift to the next higher gear if weather,
road and traffic conditions let you. For
the best fuel economy, accelerate
slowly and shift when the light comes on.
While you accelerate, it
is normal for the light to go on and off if you
quickly change the position
of the accelerator. Ignore the SHIFT light when
you downshift.
Four-Wheel-Drive Vehicles Only: If your vehicle has four-wheel drive
and is equipped with
a manual transmission, disregard the shift light when
the transfer case is in 4-LOW.
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Shifting Into “P” (Park) (Automatic
Transmission Models Only)
Steering Column Shift Lever
1. Hold the brake
pedal down
with
your right foot
and set the
parking brake.
2. Move the shift lever into “P” (Park) position like this:
0 Pull the lever toward you.
0 Move the lever up as far as it will go.
3. If you have four-wheel drive, be sure the transfer case is in a drive gear
- not in “N” (Neutral)
4. Move the ignition key to LOCK.
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5. Remove the key and take it with you. If you can walk away from your
vehicle with
the ignition key in your hand, your vehicle is in “P”
(Park).
Leaving Your Vehic/e With the Engine Running
(Automatic Transmission Models Only)
If you have to leave your vehicle with the engine running, be sure your
vehicle is
in “P” (Park) and your parking brake is firmly set before you
leave it. If you have four-wheel drive with a manual transfer case shift
lever, be sure that the transfer case
is in a drive gear - not in “N” (Neutral).
After you’ve moved the
shift lever into the “P’ (Park) position, hold the
regular brake pedal down. Then, see if
you can move the shift lever away
from “P” (Park) without first pulling it toward
you. If you can, it means that
the shift lever wasn’t
fully locked into “P” (Park).
Torque Lock (Automatic Transmission)
If you are parking on a hill and you don’t shift your transmission into “P”
(Park) properly,
the weight of the vehicle may put too much force on the
parking pawl
in the transmission. You may find it difficult to pull the shift
lever out of
“P’ (Park). This is called “torque lock.” To prevent torque lock,
set the parking brake and then shift into “P’ (Park) properly before you
leave
the driver’s seat. To find out how, see “Shifting Into ‘P’ (Park)” in the
Index.
When you are ready to drive, move the
shift lever out of “P” (Park)
BEFORE you release the parking brake.
If “torque
lock” does occur, you may need to have another vehicle push
yours
a little uphill to take some of the pressure from the transmission, so
you can pull the shift lever out of “P’ (Park).
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Parking Your Vehicle
(Manual Transmission Models
Only)
Before you get out of your vehicle, put your manual transmission in “R”
(Reverse), turn off the engine, and firmly apply the parking brake.
If you have four-wheel drive, be sure your transfer case is in a drive gear.
Your vehicle could roll
if it isn’t.
If
you are parking on a hill, or if your pulling a trailer, see “Parking on
Hills” or “Towing a Trailer” in the Index.
Parking Over Things That Burn
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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 sure your vehicle won’t move. See “Shifting Into
‘P’
(Park)’’ in the Index.
If you’re pulling a trailer, see “Towing a Trailer” in the Index.
Four- Wheel Drive
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 satisfixtion 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-wheel drive, your rear-wheel antilock brakes will take over again.
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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.\

Transfer Case
The transfer case shift
lever is on the floor to
the right of the driver.
Use this lever to shift into and out
of
An indicator near the lever shows you the transfer case settings.
The front axle portion
of the indicator
diagram will light up
when you shift into
four-wheel drive.
Some delay between shifting and the indicator’s lighting is normal.
If the
indicator light does not light
up, or if the front axle light does not go out
after you shift out
of four-wheel drive, have your dealer check your system.
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When your headlights or parking lights are on, rotate the dial to the right of
your headlight switch up
to brighten, or down to dim, your transfer case
indicator light.
2H (2-Wheel High): This setting is for driving in most street and highway
situations. Your front axle is not engaged
in two-wheel drive.
4H (4-Wheel High): This setting engages your front axle to help drive your
vehicle. Use
4H when you need extra traction, such as on wet or icy roads,
or in most off-road situations.
N (Neutral): Shift to this setting only when your vehicle needs to be towed
or when using a power take-off.
4L (4-Wheel Low): This setting also engages your front axle to give you
extra power, but should be used only for off-road driving.
You can shift from
2H to 4H or from 4H to 2H while the vehicle is moving.
Your front axle will engage faster if you take your foot off of the accelerator
for a few seconds after you shift.
In extremely cold weather it may be
necessary to stop or slow the vehicle to shift
out of 2H.
To shift into or out of 4L or “N” (Neutral):
Slow the vehicle to a roll, about 1-3 mph (2-5 kdh) and shift your
transmission into neutral.
0 Shift the transfer case shift lever in one continuous motion.
Don’t pause
in “N” (Neutral) as you shift the transfer case into 4L, or your
gears could clash.
Remember that driving
in 4H or 4L may reduce fuel economy. Also, driving
in four-wheel drive on dry pavement could cause your tires to wear fdster
and make your transfer case harder to shift.
Front Axle Locking Feature
The front axle locks and unlocks automatically when you shift the transfer
case. Some delay
for the axle to lock or unlock is normal. If the outside
temperature is very hot, or the vehicle has been used under hard driving
conditions, there may be
a slight delay for the axle to unlock.
Whenever you are
in four wheel drive, the rear wheel anti-lock brake
system does not operate. The regular brake system operates normally. When
you shift back into two-wheel drive, the anti-lock brake system will
operate.
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Your Driving and the Road
Section
Here you’ll find information about driving on different kinds of roads and in
varying weather conditions . We’ve also included many other useful tips on
driving .
Defensive Driving .......................................... 4-2
DrunkenDriving
........................................... 4-2
Control of
a Vehicle
Braking
................................................ 4-5
Steering
................................................ 4-8
Steering Tips
............................................ 4-8
Passing
............................................... 4-10
Lossofcontrol
......................................... 4-11
Off-Road Driving With Your Four-wheel Drive Vehicle
.......... 4-13
DrivingatNight
........................................... 4-24
Driving
in the Rain ........................................ 4-26
CityDriving
.............................................. 4-28
Freeway Driving
.......................................... 4-29
Hill and Mountain Roads ....................... ......... 4-31
WinterDriving
............................................ 4-33
Power Winches
........................................... 4-36
PowerTake-Off
........................................... 4-37
TowingaTrailer
........................................... 4-38
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I- .,
As you brake, your computer keeps receiving updates on rear wheel speed
and controls braking pressure accordingly.
Remember: Anti-lock doesn't change the time you need to get your foot up
to the brake pedal. If you get too close to
the vehicle in front of you, you
won't have time to apply your brakes
if that vehicle suddenly slows or
stops. Always leave enough room up ahead to stop, even though you have
anti-lock brakes.
To Use Anti-Lock
Use rear-wheel anti-lock like regular brakes. You may feel the brakes
vibrate, or
you may notice some noise outside your vehicle, but this is
normal. Let anti-lock work for
you, but remember: Your front wheels can
still stop rolling.
If that happens, release enough pressure on the brakes to
get the wheels rolling again
so that you can steer.
With the four-wheel drive option, you won't have anti-lock braking when
you shift into four-wheel drive. But you will have regular braking. When
you shift back into two-wheel drive, you
will have anti-lock again.
Braking in Emergencies
At some time, nearly every driver gets into a situation that requires hard
braking.
You have the rear-wheel anti-lock braking system.
Your front wheels can
stop rolling
when you brake very hard. Once they do, the vehicle can't
respond
to your steering. Momentum will carry it in whatever direction it
was headed when the front wheels stopped rolling. That could be off the
road, into the very thing you were trying to avoid, or into traffic.
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