wheel GMC SIERRA 1993 Owners Manual

Seats & Safety Belts
AMI 15003 AM1 15004
Take the simplest “vehicle.” Suppose it’s just a seat on wheels. Put someone
on it.
a
L
AM115005
Get it up to speed. Then stop the “vehicle.” The rider doesn’t stop.
1-14
ProCarManuals.com

Featums & Contmls
Parking Brake ........................................................................\
.............................. 2-29
Parking Over Things That Burn
........................................................................\
. 2-33
Engine Exhaust
........................................................................\
........................... 2-34
Running Your Engine While You’re Parked
...................................................... 2-35
Four-wheel Drive
........................................................................\
........................ 2-36
Transfer Case
........................................................................\
.......................... 2-37
Front Axle Locking Feature
........................................................................\
.... 2-38
Windows
........................................................................\
....................................... 2-39
Horn
........................................................................\
.............................................. 2-41
Tilt Wheel
........................................................................\
..................................... 2-41
Multifunction Lever
........................................................................\
...................... 2-42
Turn Signal and Lane Change Indicator
....................................................... 2-43
Headlight High-Low Beam
........................................................................\
...... 2-44
Windshield Wipers
........................................................................\
................... 2-45
Windshield Washer
........................................................................\
.................. 2-46
Cruise Control
........................................................................\
.......................... 2-47
Headlights and Vehicle Lighting
........................................................................\
. 2-53
Mirrors
........................................................................\
.......................................... 2-59
Sun Visors
........................................................................\
................................... 2-61
Cigarette LighterlAshtrays
........................................................................\
........... 2-62
Storage Compartments
........................................................................\
............... 2-63
Instrument Cluster ........................................................................\
....................... 2-70
Warning and Indicator Lights
........................................................................\
.. 2-78
Gages
........................................................................\
....................................... 2-87
Camper Wiring Harness
........................................................................\
............. 2-91
Trailer Wiring Harness
........................................................................\
................ 2-91
2-2
ProCarManuals.com

If you have a quick-release tailgate it can be removed by:
1. Raising the tailgate slightly and removing both retaining cables.
2. Lift the tailgate at the right side and pull it out at the left side.
Reverse the above procedure to reinstall. Make sure the tailgate is secure.
Then
Vehicle theft is a big business, especially in some cities. Although your
vehicle has a number of theft deterrent features, we know that nothing we
put on it can make it impossible to steal. However, there are ways you can
help.
Key in the Ignition: If you walk away from your vehicle with the keys inside,
it’s an easy target for joy riders or professional thieves-so don’t do it. When
you park your vehicle and open the driver’s door, you’ll hear a tone reminding
you to remove your key from the ignition and take it with you. Always do
this. Your steering wheel will be locked, and
so will your ignition. If you have
an automatic transmission, taking your key out also locks your \
transmission.
And remember to lock the doors.
Parking at Night: Park in a lighted spot, close all windows and lock your
vehicle. Remember to keep your valuables out of sight. Put them in a storage
area, or take them with you.
Parking Lots: If you park in a lot where someone will be watching your vehicle\
,
it’s best to lock it up and take your keys. But what
if you have to leave your
ignition key? What
if you have to leave something valuable in your vehicle?
Put your valuables in a storage area or console.
Lock the console.
Lock all doors except the driver’s,
Then take the door key with you.
2-9
ProCarManuals.com

Features & Controls
New Vehicle “Bmak-Rn99
1 NOTICE
Jr modern vehicle doesn’t need an elaborate “break-in.” But\
it will
perform better in the long run
if you follow these guidelines:
Keep your speed at 55 mph (88 kmlh) or less for the first 500 miles
(804 km).
Don’t drive at any one speed-fast or slow-for the first 500 miles
(804 km). Don’t make full-throttle starts.
Avoid making hard stops for the first 200 miles (322 km) or so.
During this time your new brake linings aren’t yet broken in. Hard
stops with new linings can mean premature wear and earlier
replacement. Follow this “breaking-in” guideline every time you get
new brake linings.
If you have
a 3500 HD Model, see “Parking Brake” in the Index.
Ignition Switch
Use your square key to start your vehicle. The square key lets you turn the
ignition switch
to five different positions:
6 1
RUN
KO404
Acc (Accessory): Acc lets you use things like the radio and the windshield
wipers when the engine
is off. To get into Acc, push in the key and turn it
toward you. Your steering wheel will remain locked, just as it was before you
inserted the key.
2-1 0
ProCarManuals.com

LOCK: This position locks your ignition, steering wheel and transmissi\
on. It’s
a theft deterrent feature.
You will only be able to remove your key when the
ignition is turned
to LOCK.
Off: This position lets you turn off the engine but still turn the steering wheel.
Use Off
if you must have your vehicle in motion while the engine is off (for
example,
if your vehicle is being pushed).
Run: This is the position for driving.
Start: This starts your engine.
A On manual transmission vehicles, turning the key to LOCK will lock I
A the steering column and result in a loss of ability to steer the
vehicle. This could cause a collision.
If you need to turn the engine
off while the vehicle is moving, turn the key only to OFF. Don’t move
the key release lever while the vehicle is moving.
-
f your key seems stuck in LOCK and you can’t turn it, be sure it is all
:he way in.
If it is, then turn the steering wheel left and right while you
:urn the key hard. But turn the key only with your hand. Usi\
ng a tool to
‘orce
it could break the key or the ignition switch. If none of this works,
:hen your vehicle needs service.
NOTICT
I
Key Release Levc-
KO495
The ignition key cannot be removed from the ignition of manual transmission
vehicles unless the key release lever is used.
2-1 1
ProCarManuals.com

Automatic lLansmission
K2362
There are several different positions for your gear lever.
P (Park)
This locks your rear wheels. It’s the best position to use when you start your
engine because your vehicle can’t move easily.
* It is 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 have left the engine running, the vehicle can move
suddenly. You or others could be injured.
To be sure your vehicle
won’t move, when you’re on fairly level ground, always se\
t your parking brake and move the shift lever to
P (Park).
If you have four-wheel drive, your vehicle will be free to roll-even
if
your shift lever is in P (ParkLif your transfer case is in N (Neutral).
So, be sure the transfer cas s in a drive gear-not N {“eutral).
See “Shifting Into
P- I;’’ in tne 3ex. If you are parking on a hill, or
if you’re pulling a traller, also see “Parking on Hills” \
or “Towing a
Trailer’’ in the Index.
2-2 1
ProCarManuals.com

Featums & Contmls
R (Reverse)
Use this gear to back up.
Shifting
to R (Reverse) while your vehicle is moving forward could damage
your transmission. Shift
to R (Reverse) only after your vehicle is stopped. I
b
1
damaging your transmission, see “If Yo$re Stuck: In Sand, Mud, Ice or
Snow” in the Index.
N (Neutral)
In this position, your engine doesn’t connect with the wheels.
To restart when
you’re already moving, use
N (Neutral) only. Also, use N (Neutral) when your
vehicle is being towed.
CAUTION I
Shifting out of P (Park) or N (Neutral) while your engine is “racing”
(running at high speed) is dangerous. Unless your foot is fi\
rmly on
the brake pedal, your vehicle could move very rapidly. You cou\
ld lose
control and hit people
or objects. Don’t shift out of P (Park) or N
wI ! your enaine is racing.
I
NOTICE
I
1
Damage to your transmission caused by shifting out of P (Park) or N
(Neutral) with the engine racing isn’t covered by your war\
ranty.
OD (Automatic Overdrive)
This position is
for normal driving. If you need more power for passing, and
you’re:
- Going less than about 35 mph (56 km/h), push your accelerator
- Going about 35 mph (56 kmlh) or more, push the accelerator all the
pedal about halfway down
way down
You’ll shift down
to the next gear and have more power.
OD should not be used when towing a trailer, carrying a heavy load, driving
on steep hills,
or for off-road driving. Select D (third gear) when operating the
vehicle under any of these conditions.
2-22
ProCarManuals.com

D (Third Gear)
This is like
OD, but you never go into Overdrive. You should use D when
towing a trailer, carrying a heavy load, driving on steep hills, or for off-road
driving.
2 (Second Gear)
This position gives you more power but lower fuel economy. You can use
2
on hills. It can help control your speed as you go down steep mountain
roads, but then you would also want to use your brakes
off and on.
If you manually select 2, the transmission will drive in second gear. You may
use this feature for reducing torque to the rear wheels when you are trying
to
start your vehicle from a stop on slippery road surfaces.
1 (First Gear)
This position gives you even more power (but lower fuel econo\
my) than
2.
You can use it on very steep hills, or in deep snow or mud. If the selector
lever
is put in 1, the transmission won’t shift into first gear until the vehic\
le is
going slowly enough.
NWTIGE
If your rear wheels can’t rotate, don’t try to drive. This might happen if
you were stuck in very deep sand or mud or were up against a. solid
object. You could damage your transmission.
AWZ , <,*,~l,<.,. ...
Also, if you stop when going uphill, don’t hold your vehic there with only the
accelerator pedal.
This could overheat and damage ,the transmission. Use your
brakes or shii into P (Park) to hdd your vehicle in position on a hill.
.,$*’,,&:&> ._,, , . ~ ~ ,>&:a
2-23
ProCarManuals.com

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.
I TO1 61 I
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.
2-28
ProCarManuals.com

Parking Brake
K2221
To set the parking brake:
Hold the regular brake pedal down with your right foot. Push down the
parking brake pedal with your left
foot. If the ignition is on, the brake system
warning light will come
on.
To release the parking brake:
Hold the regular brake pedal down. Pull the lever marked RELEASE.
Driving with the parking brake on can cause your rear brakes to overheat.
You may have to replace them, and you also da other p;
of I
your vehicle.
’ ‘
If you are on a hill:
See “Parking on Hills” in the Index. That part shows how to turn your front
wheels.
If you are towing a trailer and are parking on any hill:
See “Towing a Trailer” in the Index. That part shows what to do first to keep
the trailer from moving.
2-29
ProCarManuals.com