1993 BUICK LESABRE Owners Manual

0 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.
0 Don’t “ride” the brakes by letting your left foot rest
lightly
on the brake pedal while driving.
I A CAUTION: -’+
“Riding” your brakes can cause them to overheat
to the point that they won’t work well. You might
not be able to stop your vehicfe
in time to avoid
an accident. If you “ride’’ your brakes, they will
get so hot they will iequire a lot of pedal force to
slow you down. Avoid “riding” the brakes.
Riding” the brakes wears them
out much
I You would need costly brake replacement much
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.
159

0 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.
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.
See “Anti-lock Brake System Warning Light”
in the
Index.
@
ANTI
LOCK
‘1 ”. j ’ ;I
- -’ y- ..-
a,
rn
e,
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. The
computer separately works 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.
160

I
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:
1
1
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.
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.
You may also hear this during a hard stop.

Traction Control System (Option)
Your vehicle may have a traction control system that
limits wheel spin. This is especially
useful in slippery
road conditions. The traction control system works at
low speeds only, such
as when you accelerate from a
stop. It applies brake pressure
to an individual wheel
that the system senses is about to spin.
You may feel the system working, or
you may notice
some noise, but this is normal.
OFF
The “TRACTION OFF” warning light lets you know if
your traction control system is not working. See
“Traction Control System Warning Light” in the Index.
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:
0
The brake wear warning sound means that
sooner or later your brakes won’t work well. That
could lead to an accident. When you hear the
brake wear warning sound, have your vehicle
serviced.
Some driving conditions or climates may cause a brake
squeal when the brakes are first applied or lightly
1 LC3

applied. This does not mean something is wrong with
your brakes.
Rear Drum Brakes
Your rear drum brakes don’t have 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 you have the
front brakes replaced, have the rear brakes inspected,
too.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or
if there is a rapid increase in pedal
travel. This
could be a sign of brake trouble.
Brake Adjustment
Every time you make a moderate brake stop, your
brakes adjust for wear.
If you rarely make a moderate or heavier stop, then your
brakes might not adjust correctly. If you drive in that
way, then
-- very carefully -- make a few moderate brake
stops about every
1000 miles (1600 km), so your
brakes will adjust propexly.
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
163

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 y.our 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.
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 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 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
164

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.
The fact that such emergency situations are always
possible
is a good reason to practice defensive driving at
all times.
165

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 1/4 turn until the
right front tire contacts the pavement edge. Then turn
your steering wheel to go straight down the roadway. If
the shoulder appears to be about four inches
(100
mm) or more below the pavement, this difference can
cause problems.
If there is not enough room to pull
entirely onto the shoulder and stop, then follow the same
procedures. But if the right front tire scrubs against the
side of the pavement, do
NOT steer more sharply. With
too much steering angle, the vehicle may jump back
onto the road with
so much steering input that it crosses
over into the oncoming traffic before you can bring
it
back under control.
Instead, ease off again
on the accelerator and steering
input, straddle the pavement once more, then
try again.
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.