1994 CHEVROLET SUBURBAN Owners Manual

Defensive Driving
The best advice anyone can give about driving is: Drive defensively.
Please start with a very important safety device
in your vehicle: Buckle up.
(See “Safety Belts”
in the Index.)
Defensive driving really means “be ready for anything.” On city streets,
rural roads, or freeways, it means “always expect the unexpected.”
Assume that pedestrians or other drivers are going to be careless and make
mistakes. Anticipate what
they might do. Be ready for their mistakes.
Rear-end collisions are about the most preventable
of accidents. Yet they
are common. Allow enough following distance. It’s the best defensive
driving maneuver, in both city and rural driving. You never know when the
vehicle in front of you is going to brake or turn suddenly.
Drunken Driving
Death and injury associated with drinking and driving is a national tragedy.
It’s the number
one contributor to the highway death toll, claiming
thousands
of victims every year. Alcohol takes away three things that
anyone needs to drive a vehicle:
Judgment
Muscular Coordination
Vision
Police records show that almost half
of all motor vehicle-related deaths
involve alcohol
- a driver, a passenger or someone else, such as a
pedestrian, had been drinking. In most cases, these deaths are the result of
someone who was drinking and driving. About
20,000 motor
vehicle-related deaths occur
each year because of alcohol, and thousands of
people are injured.
Just how much alcohol is too much if a person plans to drive? Ideally, no
one should drink alcohol and then drive. But if one does, then what’s “too
much”? It can be a
lot less than many might think. Although it depends on
each person and situation, here is some general information on the problem.
The Blood Alcohol Content (BAC) of someone who
is drinking depends
upon four things:
0 How much alcohol is in the drink.
0 The drinker’s body weight.
The amount of food that is consumed before and during drinking.
The length of time it has taken the drinker to consume the alcohol.
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According to the American Medical Association, a 180-pound (82 kg)
person who drinks three 12-ounce
(355 ml) bottles of beer in an hour will
end up with a BAC of about
0.06 percent. The person would reach the same
BAC by drinking three 4-ounce (120
ml) glasses of wine or three mixed
drinks
if each had 1-112 ounces (45 ml) ofya liquor like whiskey, gin or
vodka.
~~ ~
It's the amount of alcohol that counts. For example, if the same person
drank three double martinis
(3 ounces or 90 ml of liquor each) within an
hour, the person's BAC would be close to 0.12 percent. A person who
consumes food just before
or during drinking will have a slightly lower
BAC level.
3 HOUU§
2 HOURS
1 HOUR
The law in most U.S. states sets the legal limit at a BAC of 0.10 percent. In
Canada the limit is
0.08 percent, and in some other countries it's lower than
that. The BAC will be over 0.10 percent after three to six drinks (in one
hour).
Of course, as we've seen, it depends on how much alcohol is in the
drinks, and how quickly the person drinks them.
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But it’s very important to keep in mind that the ability to drive is affected
well below a BAC
of 0.10 percent. Research shows that the driving skills of
many people are impaired at a BAC approaching
0.05 percent, and that the
effects are worse at night. All drivers are impaired at BAC levels above
0.05 percent. Statistics show that the chance of being in an accident
increases sharply for drivers who have a BAC
of 0.05 percent or above. A
driver with
a BAC level of 0.06 percent (three beers in one hour for a
180-pound or
82 kg person) has doubled his or her chance of having an
accident. At a BAC level of
0.10 percent, the chance of that driver having
an accident is six times greater; at a
level of 0.15 percent, the chances are
twenty-five times greater! And, the body takes about an hour to rid itself
of
the alcohol in one drink. No amount of coffee or number of cold showers
will speed that up.
“I’ll be careful” isn’t the right answer. What if there’s an emergency, a need
to take sudden action, as when a child darts into the street? A person with a
higher BAC might not be able
to react quickly enough to avoid the collision.
There’s something else about drinking and driving that many people don’t
know. Medical research shows that alcohol in a person’s system can make
crash injuries worse. That’s especially true for brain, spinal cord and heart
injuries. That means that if anyone who has been drinking
- driver or
passenger
- is in a crash, the chance of being killed or permanently
disabled is higher than if that person had not been drinking. And we’ve
already
seen that the chance of a crash itself is higher for drinking drivers.
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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Sometimes, as when you’re driving on snow or ice, it’s easy to ask more of
those control systems than the tires and road can provide. That means you
can
lose control of your vehicle.
Braking
Brakmg 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 314 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, coordination, 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 ( 100 kdh) 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.
Avoid needless heavy braking. Some people drive in spurts
- heavy
acceleration followed by heavy braking
- rather than keeping pace with
traffic. This is a mistake. Your brakes may not have time to
cool between
hard
stops. Your brakes will wear out much faster if you do a lot of heavy
braking.
If you keep pace with the traffic and allow realistic following
distances, you will eliminate a lot
of unnecessary braking. That means better
braking and longer brake life.
If your engine ever stops while you’re driving, brake normally but don’t
pump your brakes. If
you do, the pedal may get harder to push down. If
your engine stops, you will still have some power brake assist. But
you will
use it when you brake. Once the power assist is used
up, it may take longer
to stop and the brake pedal will be harder to push.
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Anti-Lock Brakes (ABS)
Your vehicle has an advanced electronic braking system that can help you
keep it under control. When you start your vehicle and begin to drive away,
you may hear a momentary motor or clicking noise. This is the ABS system
testing itself.
..>
Here's how anti-lock works. Let's say the road is wet. You're driving safely.
Suddenly an animal jumps out in front of you.
You slam
on the brakes. Here's what happens with ABS.
. ...
A computer senses that wheels are slowing down. If one of the wheels is
about to stop rolling, the computer will separately work the brakes at each
front wheel and at the rear wheels. The anti-lock system can change the
brake pressure faster than any driver could. The computer is programmed to
make the most
of available tire and road conditions. You can steer around
the obstacle while braking hard.
'.." *!
As you brake, your computer keeps receiving updates on wheel speed and
controls braking pressure accordingly.
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Remember: Anti-lock doesn’t change the time you need to get your foot up
to the brake pedal. If you get too close to the vehicle in front of you, you
won’t have time
to apply your brakes if that vehicle suddenly slows or
stops. Always
leave enough room up ahead to stop, even though you have
anti-lock brakes.
To Use Four-wheel Anti-Lock
Don’t pump the brakes. Just hold the brake pedal down and let anti-lock
work for you. You may feel the brakes vibrate, or you may notice some
noise, but this is normal.
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.
Power Steering
If you lose power steering assist because the engine stops or the system is
not functioning, 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. Both control systems
- steering and acceleration - have to do
their work where the tires meet the road. Adding
the sudden acceleration
can demand too
much of those places. You can lose control.
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What should you do if this ever happens? Ease 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.
Steering in Emergencies
There are times when steering can be more effective than braking. For
example,
you come over a hill and find a truck stopped in your lane, or a car
suddenly pulls out from nowhere, or a child darts out from between parked
cars and stops right
in front of you. You can avoid these problems by
braking
- if you can stop in time. But sometimes you can’t; there isn’t
room. That’s the time for evasive action
- steering around the problem.
Your vehicle can perform very well
in emergencies like these. First apply
your brakes. It is better to remove as much speed as you can from a possible
collision. Then steer around the problem, to the left or right depending on
the space available.
An emergency like this requires close attention and a quick decision. If
you
are holding the steering wheel at the recommended 9 and 3 o’clock
positions, you can turn it a full
180 degrees very quickly without removing
either hand. But you have
to act fast, steer quickly, and just as quickly
straighten the wheel once you have avoided the object.
The fact that such emergency situations
are always possible is ii good reason
to practice defensive driving at all times and wear safety belts properly.
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Off-Road Recovery
You may find sometime that your right wheels have dropped off the edge of
a road onto the shoulder while you’re driving.
If the level
of the shoulder is only slightly below the pavement, recovery
should be fairly easy. Ease
off the accelerator and then, if there is nothing in
the way, steer
so that your vehicle straddles the edge of the pavement. You
can turn the steering wheel up to 114 turn until the right front tire contacts the
pavement edge. Then turn your steering wheel to go straight down
the
roadway.
I 1. Edge of Road
Surface
2. Slow Down
3. Left Approx.
Quarter Turn
4. Recover
Passing
The driver of a vehicle about to pass another on a two-lane highway waits
for just
the right moment, accelerates, moves around the vehicle ahead, then
goes back into the right lane again.
A simple maneuver?
Not necessarily! Passing another vehicle on a two-lane highway is a
potentially dangerous move, since the passing vehicle occupies the same
lane as oncoming traffic for several seconds.
A miscalculation, an error in
judgment,
or a brief surrender to frustration or anger can suddenly put the
passing driver face to face
with the worst of all traffic accidents - the
head-on collision.
So here are some tips for passing:
“Drive ahead.” Look down the road, to the sides, and to crossroads for
situations that might affect your passing patterns.
If you have any doubt
whatsoever about making a successful pass, wait for a better time.
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