1993 GMC SIERRA clutch

Features & Controls
A On manual transmission vehicles, turning the key to LOCK will lock
3 steering column and result in a loss of ability to steer the
vehicle. This could cause a collision. If you need to turn th\
e engine
off while the vehicle is moving, turn the key only to OFF. Don’t move
the key -‘?ase lever while the vehicle is mc
IQ.
To Remove the Key
On manual transmission vehicles, turn the key to the LOCK position while
pressing the key release lever down. Keeping your finger on the lever, pull
the key straight out.
On automatic transmission vehicles, turn the key to
LOCK and pull it straight
out.
Starting Your Gasoline Engine
If you have a diesel engine, see “Starting Your Diesel Engine” in the Index.
Engines start differently. The 8th digit of your Vehicle Identification Number
(VIN) shows the code letter or number for your engine. You will find the VIN
at the top left
of your instrument panel. (See “Vehicle Identification Number”\

in the Index.)
Follow the proper steps to start the engine.
To Starl Your 4.3 Liter (Code Z) engine
or
5.0 Liter (Code H) 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.
NOTICE I
Manual Transmission
Shift your gear selector to neutral and hold the clutch pedal to the floor
while starting the engine. Your vehicle won’t start if the clutch pedal is
not all the way down-that’s a safety feature.
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Features &
Don’t try to shift to P (Park) if your vehicle is moving. If you do, you
could damage the transmission. Shift to
P (Park) only when your vehicle is
stopped.
m
Manual Transmission
Shift your gear selector to neutral and hold the clutch pedal to the floor
while starting the engine. Your vehicle won’t start
if the clutch pedal is
not all the way down-that’s a safety feature.
2. Don’t push the accelerator pedal before starting your engine.\
In some
other vehicles you might need
to do this, but because of your vehicle’s
computer systems, you don’t.
3. Turn your ignition key to Start. When the engine starts, let go of the
key. The idle speed will
go down as your engine gets warm.
7.4L Engine Cold Start: In cold weather, below 60” F (16” C), start the
engine the same way but push the accelerator pedal one-quarter \
of the
way down and hold it there for about
2 seconds after the engine starts.
Holding your key
in Start for longer than 15 seconds at a time will cause
vwr battery
to be drained much sooner. And the excessive heat can
,clmage your starter motor.
4. If it doesn’t start right away, hold your key in Start. If it doesn’t start in
three seconds, push the accelerator pedal about one-quarter of \
the way down for 12 more seconds, or until it starts.
flooded with
too much gasoline. Try this:
5. If your engine still won’t start (or starts but then stops), it could be
Wait 15 seconds to let the starter motor cool down. Then push your
accelerator pedal all the way
to the floor. Hold it there. Then, hold the
key in
Start for no more than ten seconds. This clears the extra
gasoline from the engine.
If the engine still doesn’t start, wait another 15
seconds and do Step 5 again.
Hot Engine Restart, 5.7L and 7.4L Engines (Vehicles Over 8500 GVWR): If
your engine is already hot and then stalls, turn your ignition\
key to Off. Then,
turn your key
to Run, and wait about 20 seconds before you restart your
engine.
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Featums & Controls
Manual Transmission:
Move your shift lever to neutral and hold the clutch pedal to the floor
while starting the engine. Your vehicle won't start
if the clutch pedal is
not all -the way down-that's a safety feature.
2. Turn your ignition key to Run. Don't turn it to Start.
- LUUk
I
3. Press the accelerator pedal all the way down and then release \
it.
With the ignition in Run, the GLOW PLUGS light will come on. This
means that part
of your engine is being warmed up for better starting.
When the light goes
off, your engine is ready to start.
If the engine ls already warm, this light may not come.'on. That's normal.
4. If this light does not come on, or the instant the light goes off, turn your
ignition key to
Start. When the engine starts, let go of the key. I
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Features & Controls
FivemSpeed Manual lZransmission
(Without Low Gear)
I
K2220
This is your shift pattern. Here’s how to operate your tran\
smission:
K2386
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 kmlh). If
you’ve come to a complete stop and it’s hard to shift into 1, put the
shift lever in Neutral and let up on the clutch. Press the c\
lutch pedal back down. Then shift into
1.
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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.
N (Neutral)-Use this position when you start or idle your engine,
R (Reverse)-To back up, press down the clutch pedal and shift into R. Let
up on the clutch pedal slowly while pressing the accelerator p\
edal.
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, for parking your vehicle.
FivemSpeed Manual 7Fansmission
(With Low Gear)
e
K2464
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This is your shift pattern. Here’s how to operate your transmission:
I IC2287
L (Low Gear) (Overdrive Five-Speed Transmission Only)-Press the
clutch pedal and shift into
L. Then, slowly let up on the clutch pedal as
you press the accelerator pedal. Shift into
L only when the vehicle
speed is below
5 mph (8 km/h). If you try to shift into L at excessive
vehicle speeds, the shift lever will not move into the
L position until
vehicle speed is reduced.
L is intended for heavy loads and is not recommended for normal
driving.
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 kmlh). If
you’ve come to a complete stop and it’s hard to shift into 1, put the
shift lever in
N (Neutral) and let up on the clutch. Press the clutch pedal
back down. Then shift into
1. If you try to shift into 1 at excessive
vehicle speeds, the shift lever will not move into the
1 position until
vehicle speed is reduced.
accelerator pedal and shift into
2. Then, slowly let up on the clutch
pedal as you press the accelerator pedal.
Higher Gears -Shift into the higher gears the same way you do for 2.
Slowly let up on the clutch pedal as you press the accelerato\
r pedal.
2 (Second Gear)-Press the clutch pedal as you let up on the
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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
N (Neutral).
N (Neutral)-Use this position when you start or idle your engine.
R (Reverse)-To back up, press the clutch pedal and shift into R. Let up on
the clutch pedal slowly while pressing the accelerator pedal. If you shift from
OD into R, the shift lever must first be placed in the N (Neutral) position
centered between
2 and 3 prior to shifting into R.
NOTICE I
Shift to R (Reverse) only after your vehicle is stopped. Shifting to R
(Reverse) while vour vehicle is movina could damaae vour transmission.
- -
Also, use Reverse, along with the parking brake, for parking your ve\
hicle.
Shift Light
I K2317
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 for best fuel economy.
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.
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Features & Controls
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.
Shift Speeds-Manual Transmission
This chart shows when to shift to the next higher gear for best fuel economy.
MANUAL TRANSMISSION RECOMMENDED SHIFT SPEED
IN MPH (KMIH)
Engine
and
VIN
45-50 25-40 50 40 15
4,3L
V6
3 to 4 2 to 3 1 to 2 3 to 4 2 to 3 1 to 2 Code
Trans. Cruise Shift Speed
Acceleration Shift Speed
(4
- (64) (40) (24) (K)
(72-80)
(40-64) - (80) (64)
(24)
5-Speed*
40 25 15 5.7L V8
- -
* Transmission with L (low) gear only. L (low) is intended for heavy loads and
is not recommended for normal driving.
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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 smoothly or for good
performance.
I A If you skip more than one gear when you downshift, you could lose
I & control of your vehicle: And you could injure yourself or others. I
I Ju skip more than one gear when you downshift, or if you race the
;,,,ine when you downshift, you can damage the clutch or transmission. \
I
Locking Rear Axle
If you have this feature, your rear axle can give you additional \
traction on
snow, mud, ice, sand or gravel.
It works like a standard axle most of the
time,
but when one of the rear wheels has no traction and the other does,
the locking feature
will allow the wheel with traction to move the vehicle.
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