1993 BUICK SKYLARK brake

Braking
Braking action involves perception time and reaction
time.
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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, 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 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.
Most drivers treat their brakes with care. Some,
however, overwork the braking system with poor
driving habits.
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.
Don’t “ride” the brakes by letting your left foot rest
lightly on the brake pedal while driving.
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I A CAUTION.:
“Riding” your brakes can cause them to overhe;
to the point that they won’t work well. You mighl
not be able to stop your vehicle
in time to avoid
an accident. If you “ride” your brakes, they will
get
so hot they will require a lot of pedal fol- -
slow you. down. Avoid “riding” the brakes.
If you keep pace with the traffic and IW realistic
following distances, you will eliminate a lot
of
unnecessary braking. That means better braking and
longer brake life.
If your I- -dine 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.
Anti-Lock Brakes (ABS)
Your Buick has an advanced electronic braking system
that will help prevent skidding.
This light on the instrument panel will go on when you
start your vehicle.
TI-
LOCK
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When you start your vehicle and begin to drive away,
you may hear a momentary motor or clicking noise. And you may even notice that your brake pedal moves a little
while this is going on. This
is the ABS system testing
itself.
If you have your foot on the brake pedal, this
check won’t happen until the vehicle goes about 4.mph
(6 km/h) or until you take your foot off the brake pedal.
After an ABS stop, you may hear a clicking noise the
next time the vehicle goes about
4 mph (6 km/h).
If there’s a problem with the anti-lock brake system, the
anti-lock brake system warning light will stay on or
flash.
See “Anti-lock Brake System Warning Light” in the
Index.
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.
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A computer senses that wheels are slowing down. The
computer separately works the brakes at each fmnt
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.
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r
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.
A CAUTION:
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 Anti-Lock:
Don’t pump the brakes. Just hold the brake pedal down
and let anti-lock work for you. You also may hear a
clicking noise as you accelerate after a hard stop.
Disc Brake Wear Indicators
Your Buick 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 may come and
go or be heard all the time your vehicle is moving (except
when you are pushing on the brake pedal firmly).

A CAUTION:
The brake wear warning sound means that could lead to an accident. When you hear the
brake wear warning sound, have your vehicle
sooner or later your
brakes won’t work well. That

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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When you drive into a curve at night, it's harder to see
the road ahead
of you because it bends away from the
straight beams
of your lights. This is one good reason to
drive slower.
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
Qf 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 Buick 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. You must then be prepared to steer
back to your original lane and then brake to a controlled
stop.
Depending
on your speed, this can be rather violent for
an unprepared driver. This is one of the reasons driving
experts recommend that you use your safety belts and
keep both hands on the steering wheel.
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3'
The fact that such emergency situations are always
possible is a good
reason to practice defensive driving at
all times.
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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 when the three control systems (brakes, steering and acceleration) don’t have 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
possible. The three types
of skids correspond
to your Buick’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 foot
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’l\
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..
want to slow down and adjust your driving to 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 braking by shifting to a lower gear). Any sudden changes could cause the tires to slide.
You may not realize the surface is slippery until your
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