gas type GMC SIERRA 1996 Owners Manual

In any particular crash, no one can say whether an air
bag should have inflated simply because of the damage
to a vehicle or because
of what the repair costs were.
Inflation is determined by the angle of
the impact and
the vehicle’s deceleration. Vehicle damage is only one
indication
of this.
The air bag
system is designed to work properly under a
wide range of conditions, including off-road usage.
Observe safe driving speeds, especially
on rough terrain.
As always, wear your safety belt. See “Off-Road
Driving”
in the Index for more tips on off-road driving.
What makes an air bag inflate?
In a frontal or near-frontal impact of sufficient severity,
the air bag sensing system detects that
the vehicle is
suddenly stopping as a result of a crash. The sensing
system triggers
a chemical reaction of the sodium azide
sealed
in the inflator. The reaction produces nitrogen
gas, which inflates the air bag. The inflator, air bag and
related hardware are all part of the air bag module
packed inside the steering wheel.
How does an air bag restrain?
In moderate to severe frontal or near-frontal collisions,
even belted occupants can contact the steering
wheel.
The air bag supplements the protection provided by
safety belts. Air bags distribute the force of the impact
more evenly over the occupant’s upper body, stopping
the occupant more gradually. But air bags would
not
help you in many types of collisions, including
rollovers, rear impacts and side impacts, primarily
because an occupant’s motion
is not toward the air bag.
Air bags should never be regarded as anything more
than a supplement
to safety belts, and then only in
moderate to severe frontal or near-frontal collisions.
What will you see after an air bag inflates?
After the air bag inflates, it quickly deflates. This occurs
so quickly that some people may not even realize the air
bag inflated. Some components
of the air bag module in
the steering wheel hub will be hot for a short time. The
part of the bag that comes into contact with you
may be
warm, but
it will never be too hot to touch. There will be
some smoke and dust coming from vents
in the deflated
air bag.
Air bag inflation will not prevent the driver
from seeing or from being able
to steer the vehicle, nor
will it stop people from leaving the vehicle.
1-24
ProCarManuals.com

If your vehicle is certified to meet California Emission
Standards (indicated on the underhood tune-up label),
it
is designed to operate on fuels that meet California
specifications.
If such fuels are not available in states
adopting California emissions standards,
your vehicle
will operate satisfactorily
on fuels meeting federal
specifications, but emission control system performance
may be affected. The malfunction indicator lamp on
your instrument panel may
turn on and/or your vehicle
may fail a smog-check test.
If this occurs, return to your
authorized GM dealer for diagnosis
to determine the
cause
of failure. In the event it is determined that the
cause
of the condition is the type of fuels used, repairs
may not be covered by
your warranty.
In Canada. some gasolines contain an octane-enhancing
additive called
MMT. If you use such fuels, your
emission control system performance may deteriorate
and the tnalfunction indicator lamp
on your instrument
panel may turn on. If this happens, return to your
authorized
CM dealer for service.
To provide cleaner air, all gasolines are now required to
contain additives that will help prevent deposits from
forming
in your engine and fuel system, allowing your
emission control system
to function properly. Therefore,
you should not have to add anything to the fuel. In
addition, gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may be
available
in your area to help clean the air. General
Motors recommends that
you use these gasolines if they
comply with the specifications described earlier.
NOTICE:
Your vehicle was not designed for fuel that
contains methanol. Don’t use it.
It can corrode
metal parts
in your fuel system and also damage
plastic and rubber parts. That damage wouldn’t
be covered under your warranty.
6-3
ProCarManuals.com

Be careful not to spill gasoline. Clean gasoline from
painted surfxes as soon
as possible. See “Cleaning the
Outside
of Your Vehicle” in the Index.
When you put the cap back
on, turn it to the right until
you hear at least three clicks. Make sure you fully install
the cap. The diagnostic system can determine if the fuel
cap has been
left off or improperly installed. This would
allow
fuel to evaporate into the atmosphere. See
“Malfunction Indicator Lamp” in the Index.
I NOTICE:
If you need a new cap, be sure to get the right
type. Your dealer can get one for you. If you get
the wrong type, it may not fit or have proper
venting, and your fuel tank and emissions system
might be damaged.
Checking Things Under the Hood
h
I ! CAUTION:
If your vehicle has air conditioning, the auxiliary
engine fan under the hood can start up and
hjure you even when the engine
is not running.
Keep hands, clothing and tools away from any
underhood electric fan.
Things that burn can get on hot engine parts and
start a fire. These include liquids like gasoline or
diesel fuel, oil, coolant, brake fluid, windshield
washer and other fluids, and plastic or rubber.
You
or others could be burned. Be careful not to drop
or spill things that will burn onto a hot engine.
6-6
ProCarManuals.com

Radiator Pressure Cap
(Gasoline Engine)
The radiator pressure cap must be tightly installed with
the arrows on the cap lined LIP with the overflow tube on
the radiator filler neck.
NOTICE:
Your radiator cap is a 15 psi (105 kPa)
pressure-type cap and must be tightly installed
to prevent coolant
loss and possible engine
damage from overheating. Be sure the arrows
on the
cap line up with the overflow tube on the
radiator filler neck.
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches
a preset temperature.
When you replace your thermostat, an AC@ thermostat
is recommended.
6-30
ProCarManuals.com

Battery
Every new vehicle has 21 Delco Freedom@ battery. You
never have
to add water to one of these. When it’s time
for a new battery, we recommend a Delco Freedom
battery. Get one that has the replacement number shown
on the original battery’s label.
Vehicle Storage
If you’re not going to drive your vehicle for 25 days
or more, take
off the black, negative (-) cable from
the battery. This
will help keep your battery from
runnine down.
I A CAUTION:
Contact your dealer to learn how to prepare your vehicle
for longer storage periods.
Also, for your audio system, see ”Theft-De-terrent
Feature”
in the Index.
Bulb Replacement
Before you replace any bulbs, be sure that all the lamps
are
off and the engine isn’t running. See “Replacement
Bulbs”
in the Index for the proper types of bulbs to use.
Halogen Bulbs
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
aren’t careful. See “Jump Starting” in the Index
for tips on working around a battery without getting hurt.
-A i
F-
Halogen bulbs have prc-arized gas inside and
can burst
if you drop or scratch the bulb. You or
others could be injured. Be sure to read and
follow the instructions on the bulb package.
6-37
- .-
ProCarManuals.com

Appear nce CT-e
Remember, cleaning products can be hazardous. Some
are toxic. Others can burst into
flame if you strike a
match or get them on a hot part of the vehicle. Some are
dangerous if
you breathe their fumes in a closed space.
When you use anything from’ a container
to clean your
vehicle, be sure
to follow the manufacturer’s warnings
and instructions. And always open your doors or
windows
when you’re cleaning the inside.
Never use these to clean your vehicle:
0 Gasoline
0 Benzene
0 Naphtha
Carbon Tetrachloride
0 Acetone
0 Paint Thinner
0 Turpentine
0 Lacquer Thinner
0 Nail Polish Remover
They can all be hazardous
-- some more than
others
-- and they can all damage your vehicle, too. Don’t use
any of these unless this manual says
you can.
In many uses, these will damage your vehicle:
0 Alcohol
Laundry Soap
Bleach
0 Reducing Agents
Cleaning the Inside of Your Vehicle
Use a vacuum cleaner often to get rid of dust and loose
dirt. Wipe
vinyl or leather with a clean, damp cloth.
Your
GM dealer has two GM cleaners, a solvent-type
spot lifter and
a foam-type powdered cleaner. They will
clean normal spots and stains very well.
Do not use
them
on vinyl or leather.
Here are some cleaning tips:
0 Always read the instructions on the cleaner label.
0 Clean up stains as soon as you can -- before they set.
0 Use a clean cloth or sponge, and change to a clean area
0 Use solvent-type cleaners in a well-ventilated area
often.
A
soft brush may be used if stains are stubborn.
only. If you use them, don’t saturate
the stained area.
If a ring forms after spot cleaning, clean the entire
area immediately or it
will set.
6-58
ProCarManuals.com