transmission GMC SIERRA 1994 User Guide

NOTICE:
Shift to “R” (Reverse) only after your vehicle is stopped.
Shifting
to “R” (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.
Five-Speed Manual Transmission
(Without
Low Gear)
This is your shift
pattern. Here’s how to
operate your
transmission:
1 (First Gear) - Press the clutch pedal and shift into “1 .” Then,
slowly
let up on the clutch pedal as you press the accelerator pedal.
You can shift into
“1” when you’re going less than 20 mph (32 km/h).
If you’ve come to a complete stop and it’s hard to shift into L‘ 1 ,” put the
shift lever
in Neutral and let up on the clutch. Press the clutch pedal
back down. Then shift
into LLl.”
2 (Second Gear) - Press the clutch pedal as you let up on the
accelerator pedal and shift
into “2.” Then, slowly let up on the clutch
pedal as
you press the accelerator pedal.
3,4 and 5 (Third, Fourth and Fifth Gears) - Shift into “3,” “4” and
“5” the same way you do for “2.” Slowly let up on the clutch pedal as
you press the accelerator pedal.
To Stop - Let up on the accelerator pedal and press the brake pedal.
Just before the vehicle stops, press
the clutch pedal and the brake pedal,
and shift to Neutral.
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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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Manual Transmissions- Shift Speeds
If you have a five-speed manual transmission (with low gear), th\
is chart
shows when to shift to the next higher gear for best fuel economy.
Recommended Shift Speeds - Five Speed
Manual Transmission
with Low Gear*
Engine (VIN Code)
4.3L V6 (Z)
5.7L V8 (K)
4.3L V6 (Z)
Acceleration Shift Speed MPH (KM/H)
15 (24)
15 (24) 40 (64)
25 (40)
Cruise Shift Speed MPH (KM/H)
25-40
(40-64) 50
(80)
40 (64)
45-50
(72-80)
*L (low) is intended for use with heavy loads and is not recommended for
normal driving
If your speed drops below
20 mph (32 km/h), or if the engine is not running
smoothly, you should downshift to the next lower gear. You may have to
downshift two or more gears to keep the engine running smoothl\
y or for
good performance.
NOTICE:
If you skip more than one gear when you downshift, or if you
race the engine when you downshift, you can damage the engine,\

clutch or transmission.
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NOTICE:
Driving with the parking brake on can cause your rear brakes to
overheat. You may have
to replace them, and you could also
damage other parts of your vehicle.
If you are towing a trailer and are parking on any hill: See “Towing a
Trailer” in the Index. That section shows what to do first to keep the trailer
from moving.
Propshaft Brake Burnish Procedure
If you have a 3500 HD model, it is recommended that the propshaft
mounted parking brake be burnished
as part of the new vehicle break in.
The parking brake will work best after it has been burnished following these
instructions.
Make
10 (ten) stops, using the parking brake foot pedal, from 20 mph
(32 kdh) about
2 1/2 miles (4 km) apart. In between stops, drive the
vehicle at
20 mph (32 km/h).
Torque Lock
The parking brake should be set first whenever you leave the driver’s seat.
If you are parked on
a hill and the transmission is placed in “P” (Park)
before
the parking brake is set, the weight of the vehicle may put too much
force
on the parking pawl in the transmission. It may be difficult to pull the
selector lever out
of “P’ (Park). This is called “torque lock.” To prevent this,
the parking brake should be set
BEFORE moving the gear selector to “P’
(Park).
When preparing to move
a vehicle parked on a hill, the selector lever should
be moved out of
“P’ (Park) BEFORE releasing the parking brake. Even
when
on level surfaces, its a good idea to set the parking brake first before
shifting
the transmission from “P” (Park).
If torque lock does occur, you may have to have another vehicle nudge your
vehicle uphill a little to take some
of the pressure off the transmission while
you pull the selector lever out of “P” (Park).
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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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Engine Exhaust Running Your Engine While You’re Parked
(Automatic Transmission)
It’s better not to park with the engine running. But if you ever have to, here
are some things
to know.
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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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Using Cruise Control on Hills
How well your Cruise Control will work on hills depends upon your speed,
load, and the steepness of the hills. When going up steep hills, you may
have to step
on the accelerator pedal to maintain your speed. When going
downhill, you may have to brake or shift to a lower gear to keep your speed
down.
Of course, applying the brake takes you out of Cruise Control. Many
drivers find this to be too much trouble and don’t use Cruise Control on
steep hills.
To Get Out of Cruise Control
There are two ways to turn off the Cruise Control:
0 Step lightly on
the brake pedal or
push the clutch
pedal, if you have
a manual
transmission
OR;
0 move the Cruise switch to
OFF.
To Erase Speed Memory
When you turn off the Cruise Control or the ignition, your Cruise Control
set speed memory is erased.
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