tires CHEVROLET ASTRO PASSENGER 1993 1.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
Control of a Vehicle
You have three systems that make your vehicle go where you want it to go.
They are the brakes, the steering and the accelerator. All three systems have
to
do their work at the places where the tires meet the road.
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AN409007
Sometimes, as when you’re driving on snow or ice, it’s e\
asy to ask more of
those control systems than the tires and road can provide. Tha\
t means you
can lose control of your vehicle.
Braking
Braking action involves perception time and reaction time.
First, you have to decide to push on the brake pedal. That’s perception
time.
Then you have to bring up your foot and do it. That’s reaction time.
Average reaction time is about 3/4 of a second. But that’s only an average.
It might be less with one driver and as long as two or three seconds or \
more with another. Age, physical condition, alertness, coordinati\
on, and
eyesight all play a part.
So do alcohol, drugs and frustration. But even in
3/4 of a second, a vehicle moving at
60 mph (1 00 km/h) travels 66 feet
(20 m). That could be a lot of distance in an emergency, so keeping enough
space between your vehicle and others is important.
And, of course, actual stopping distances vary greatly with the surface of the \
road (whether it’s pavement or gravel); the condition
of the road (wet, dry,
icy); tire tread; and the condition of your brakes.
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Downloaded from www.Manualslib.com manuals search engine Disc Brake Wear Indicators
Your vehicle has front disc brakes and rear drum brakes. Disc brake\
pads
have built-in wear indicators that make a high-pitched warning sound when
the brake pads are worn and new pads are needed. The sound m\
ay come and go or be heard all the time your vehicle is moving (except when you are
pushing on the brake pedal firmly).
I CAUTION
A The brake wear warning sound means that sooner or later your
4 brakes won’t work well. That could lead to an accident. When you
hear the brake wear warning sound, have your vehicle serviced. \
I
NCTICE
Some driving conditions or climates may cause a brake squeal when the
brakes are first applied or lightly applied. This does not mean something is
wrong with your brakes.
Rear Drum Brakes
Your rear drum brakes don’t have the wear indicators, but if you ever hear a
rear brake rubbing noise, have the rear brake linings inspected\
. Also, the rear
brake drums should be removed and inspected each time the tires are
removed for rotation or changing. When
have the rear brakes inspected, too.
Brake linings should always be replaced
Brake Pedal Travel
See your dealer if the brake pedal does
there
is a rapid increase in pedal travel.
trouble.
Brake Adjustment
Every time you make a brake stop, your you have
the front brakes replaced,
as complete axle sets.
not return to normal height, or
if
This could be a sign of brake
disc brakes adjust for wear.
If your
brake pedal goes down farther than normal, your rear drum brak\
es may need
adjustment. Adjust them by backing up and firmly applying the brakes a few
times.
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Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
Braking In Emergencies
Use your anti-lock braking system when you need to. With anti-\
lock, you can
steer and brake at the same time. In many emergencies, steering can help
you more than even the very best braking.
Steering
Power Steering
If you lose power steering assist because the engine stops or the\
system
fails
to function, you can steer but it will take much more effort.
Steering Tips
Driving on Curves
It’s important to take curves at a reasonable speed.
A lot of the “driver lost control” accidents mentioned on the news happen on
curves. Here’s why:
Experienced driver or beginner, each of us
is subject to the same laws of
physics when driving on curves. The traction of the tires against the \
road
surface makes it possible for the vehicle
to change its path when you turn
the front wheels.
If there’s no traction, inertia will keep the vehicle going in \
the same direction.
If you’ve ever tried to steer a vehicle on wet ice, you’ll
understand this.
The traction you can get in
a curve depends on the condition of your tires
and the road surface, the angle at which the curve is banked,\
and your
speed. While you’re in a curve, speed is the one factor you can control.
Suppose you’re steering through a sharp curve. Then you suddenly
accelerate. Those two control systems-steering and acceleration-can
overwhelm those places where the tires meet the road and make \
you lose
control.
What should you
do if this ever happens? Let up on the accelerator pedal,
steer the vehicle the way you want it
to go, and slow down.
Speed limit signs near curves warn that you should adjust your\
speed. Of
course, the posted speeds are based on good weather and road \
conditions. Under less favorable conditions you’ll want
to go slower.
If you need to reduce your speed as you approach a curve, do it before you
enter the curve, while your front wheels are straight ahead.
Try to adjust your
speed
so you can “drive” through the curve. Maintain a reasonable, steady
speed. Wait to accelerate until you are out of the curve, and\
then accelerate gently into the straightaway.
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Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
0
Check your mirrors, glance over your shoulder, and start your \
left lane
change signal before moving out of the right lane
to pass. When you
are far enough ahead of the passed vehicle
to see its front in your
inside mirror, activate your right lane change signal and move \
back into
the right lane. (Remember that your right outside mirror is c\
onvex. The
vehicle you just passed may seem
to be further away from you than it
really
is.)
Try not to pass more than one vehicle at a time on two-lane roads.
Reconsider before passing the next vehicle.
Don’t overtake a slowly moving vehicle
too rapidly. Even though the
brake lights are not flashing, it may be slowing down or starting
to turn.
If you’re being passed, make it easy for the following driver
to get ahead
of you. Perhaps you can ease a little
to the right.
Loss of Control
Let’s review what driving experts say about what happens whe\
n the three
control systems (brakes, steering and acceleration) don’t ha\
ve enough friction
where the tires meet the road
to do what the driver has asked.
In any emergency, don’t give up. Keep trying
to steer, and constantly seek an
escape route or area of less danger.
Skidding
In a skid, a driver can lose control of the vehicle. Defensive drivers avoid
most skids by taking reasonable care suited to existing conditions, and by not
“overdriving” those conditions. But skids are always possib\
le.
The three types
of skids correspond to your vehicle’s three control systems.
In the braking skid, your wheels aren’t rolling. In the steering or cornering
skid,
too much speed or steering in a curve causes tires to slip and lose
cornering force. And in the acceleration skid,
too much throttle causes the
driving wheels
to spin.
A cornering skid and an acceleration skid are best handled by easing your
foot
off the accelerator pedal. If your vehicle starts to slide (as when you turn
a corner on a wet, snow- or ice-covered road), ease your foo\
t
off the
accelerator pedal
as soon as you feel the vehicle start to slide. Quickly steer
the way you want the vehicle
to go. If you start steering quickly enough, your
vehicle will straighten out.
As it does, straighten the front wheels.
Of course, traction is reduced when water, snow, ice, gravel, or other material
is on the road. For safety, you’ll want
to slow down and adjust your driving to
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Downloaded from www.Manualslib.com manuals search engine these conditions. It is important to slow down on slippery surfaces because
stopping distance will be longer and vehicle control more limited.
While driving on a surface with reduced traction, try your best to avoid
sudden steering, acceleration, or braking (including engine brak\
ing by shifting
to a lower gear). Any sudden changes could cause the tires to s\
lide. You
may not realize the surface is slippery until your vehicle is skidding. Learn to
recognize warning clues-such as enough water, ice or packed sno\
w on the
road to make a “mirrored sutface”-and slow down when you have any\

doubt.
Remember: Any anti-lock braking system
(ABS) helps avoid only the braking
skid. Steer the way you want to go.
Driving at Night
AN450006
Night driving is more dangerous than day driving. One reason is that some
drivers are likely to be impaired-by alcohol or drugs, with night vision
problems, or by fatigue.
Here are some tips on night driving.
Drive defensively. Remember, this is the most dangerous time.
Don’t drink and drive (See “Drunken Driving” in the Index for more on
Adjust your inside rearview mirror to reduce the glare from he\
adlights
this problem.)
behind you.
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Downloaded from www.Manualslib.com manuals search engine Your Driving and #he Road
Driving in the Rain
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Rain and wet roads can mean driving trouble. On a wet road y\
ou can’t stop,
accelerate or turn as well because your tire-to-road traction isn’t as good as
on
dry roads. And, if your tires don’t have much tread left, you’ll get even
less traction.
It’s always wise to go slower and be cautious
if rain starts to fall while you
are driving. The sutface may get wet suddenly when your reflexes a\
re tuned
for driving on dry pavement.
The heavier the rain, the harder
it is to see. Even if your windshield wiper
blades are in good shape, a heavy rain can make
it harder to see road signs
and traffic signals, pavement markings, the edge of the road, and even
people walking. Road spray can often be worse for vision than \
rain,
especially
if it comes from a dirty road.
So it is wise to keep your wiping equipment in good shape and keep your
windshield washer tank filled. Replace your windshield wiper inserts when \
they
show signs
of streaking or missing areas on the windshield, or when strips of
rubber start
to separate from the inserts.
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Downloaded from www.Manualslib.com manuals search engine I
AM455019
Driving too fast through large water puddles or even going thr\
ough some car
washes can cause problems
too. The water may affect your brakes. Try to
avoid puddles. But if you can’t, try to slow down before you hit them.
Wet brakes can cause accidents. They won’t work well in a quick
stop and may cause pulling
to one side. You could lose control of
the vehicle.
After driving through a large puddle of water or a car wash, apply
your brake pedal lightly until your brakes work normally.
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Hydropraning
Hydroplaning is dangerous. So much water can build up under your tires that
they can actually ride on the water. This can happen
if the road is wet
enough and you’re going fast enough. When your vehicle is hydroplaning, it
has
little or no contact with the road.
You might not be aware of hydroplaning. You could drive along for some time
without realizing your tires aren’t in constant contact with the road. You could
find out the hard way: when you have
to slow, turn, move out to pass-or if
you get hit by a gust of wind. You could suddenly find yourself out of control.
Hydroplaning doesn’t happen often. But
it can if your tires haven’t much tread
or
if the pressure in one or more is low. It can happen if a lot of water is
standing on the road. If you can see reflections from trees, \
telephone poles,
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Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
or other vehicles, and raindrops “dimple” the water’s s\
urface, there could be
hydroplaning. Hydroplaning usually happens at higher speeds. There just isn’\
t a hard and
fast rule about hydroplaning. The best advice
is to slow down when it is
raining, and be careful.
Some Other Rainy Weather Tips
Turn on your headlights-not just your parking lights-to help ma\
ke you more visible
to others.
Look for hard-to-see vehicles coming from behind. You may want to use
your headlights even
in daytime if it’s raining hard.
Besides slowing down, allow some extra following distance. And \
be
especially careful when you pass another vehicle. Allow yourself\
more
clear room ahead, and be prepared
to have your view restricted by road
spray.
If the road spray is so heavy you are actually blinded, drop back.
Don’t pass until conditions improve. Going more slowly is be\
tter than
having an accident.
Use your defogger
if it helps.
Have good tires with proper tread depth. (See “Tires” in\
the Index.)
Driving in Fog, Mist and Haze
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AN459007
Fog can occur with high humidity or heavy frost. It can be so mild that you
can see through
it for several hundred feet (meters). Or it might be so thick
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Downloaded from www.Manualslib.com manuals search engine Driving On a Long nip
Although most long trips today are made on freeways, there are still many
made on regular highways.
Long-distance driving on freeways and regular highways is the same in some
ways. The trip has to be planned and the vehicle prepared, you drive at
higher-than-city speeds, and there are longer turns behind the wheel. You’ll
enjoy your trip more
if you and your vehicle are in good shape. Here are
some tips for a successful long trip.
Before Leaving on a Long Trip
Make sure you’re ready. Try to be well rested. If you must start when you’re
not fresh-such as after a day’s work-don’t plan to make too many miles
that first part of the journey. Wear comfortable clothing and shoes you can
easily drive in.
Is your vehicle ready for a long trip? If you keep it serviced and maintained,
it’s ready to
go. If it needs service, have it done before starting out. Of
course, you’ll find experienced and able service experts in
GM dealerships all
across North America. They’ll be ready and willing to help
if you need it.
Here are some things you can check before a trip:
Windshield Washer Fluid: Is the reservoir full? Are all windows clean
Wiper Blades: Are they in good shape?
Fuel, Engine Oil, Other Fluids: Have you checked all levels?
Lights: Are they all working? Are the lenses clean?
Tires: They are vitally important to a safe, trouble-free trip. Is the tread
good enough for long-distance driving? Are the tires all inflated to the
recommended pressure?
Should you delay your trip a short time to avoid a major storm system?
inside and outside?
Weather Forecasts: What’s the weather outlook along your route?
Maps: Do you have up-to-date maps?
On the Road
Unless you
are the only driver, it is good to share the driving task with
others. Limit turns behind the wheel to about
100 miles (160 km) or two
hours- at a sitting. Then, either change drivers or stop for some refres\
hment
like coffee, tea or soft drinks and some limbering up. But
do stop and move
around. Eat lightly along the way. Heavier meals tend to make some people
sleepy.
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Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
On two-lane highways or undivided multilane highways that do not have
controlled access, you’ll want to watch for some situations not usually found
on freeways. Examples are: stop signs and signals, shopping cen\
ters with
direct access to the highway, no passing zones and school zones, vehicles
turning left and right
off the road, pedestrians, cyclists, parked vehicles, and
even animals.
Highway Hypnosis
Is there actually such a condition as “highway hypnosis?’’ Or is it just plain
falling asleep at the wheel? Call it highway hypnosis, lack of awareness, or
whatever.
There is something about an easy stretch
of road with the same scenery,
along with the hum
of the tires on the road, the drone of the engine, and the
rush
of the wind against the vehicle that can make you sleepy. Don’t le\
t it
happen to you!
If it does, your vehicle can leave the road in less than a
second, and you could crash and be injured.
What can you do about highway hypnosis? First, be aware that it can
happen.
Then here are some tips:
Make sure your vehicle is well ventilated, with a comfortably cool interior.
Keep your eyes moving. Scan the road ahead and to the sides. Check
your rearview mirrors frequently and your instruments from time \
to time.
This can help you avoid a fixed stare.
Wear good sunglasses in bright light. Glare can cause drowsiness. But
don’t wear sunglasses at night. They will drastically reduce \
your overall
vision at the very time you need all the seeing power you have.
If you get sleepy, pull off the road into a rest, service, or parking area
and take a nap, get some exercise, or both. For safety, treat\
drowsiness
on the highway as an emergency.
As in any driving situation, keep pace with traffic and allow adequat\
e
following distances.
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