wheel BUICK RIVIERA 1993 User Guide

Cruise Control can be dangerous where
you can't drive safely at
a steady speed.
So, don't use your Cruise Control on
winding roads or in heavy traffic.
Cruise Control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause
needless wheel spinning, and you could
lose control. Don't use Cruise Control on
slippery roads.

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. 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.
155

I 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.
. 5 ’,.
To Use Anti-Lock:
Don’t pump the brakes. Just hold the brake pedal down
and let anti-lock work for you. You may hear the
anti-lock pump or motor operate, and feel the brake
pedal pulsate, but this is normal.
.
Disc Brake Wear Indicators
Your Buick has four-wheel disc 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).
I ‘
A CAUTION:
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. &tz
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.
Brake linings should always be replaced as complete
axle sets.
156

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 disc
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 properly.
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.
157

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.
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.
159

0
0
0 0
0
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 thee 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 acceleratorpedal 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 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
vehicle is skidding. Learn to recognize warning clues
--
such as enoughewater, ice or packed snow on the road to make
a “mirrored surface” -- 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
Night driving is more dangerous than day driving. One reason
is that some drivers are likely to be impaired --
162
I

Just before you leave the lane, glance quickly over your
shoulder to make sure there isn’t another vehicle in your
“blind” spot.
If you are moving from an outside to a center lane on a
freeway having more than two lanes, make sure another
vehicle isn’t about to move into the same spot. Look at
the vehicles two lanes over and watch for telltale signs:
turn signals flashing, an increase in speed,
or moving
toward the edge of the lane. Be prepared to delay your
move.
Once you are moving on the freeway, make certain you
allow a reasonable following. distance. Expect to move
slightly slower at night.
Leaving the Freeway
When you want to leave the freeway, move to the proper
lane well in advance. Dashing across lanes at the last
minute is dangerous.
If you miss your exit do not, under
any circumstances, stop and back up. Drive on to the
next exit.
At each exit point is a deceleration lane. Ideally it
should be long enough for you to enter it at freeway
speed (after signaling, of course) and then do your
braking before moving onto the exit ramp.
Unfortunately, not all deceleration lanes are long enough
-- some are too short for all the braking. Decide when to
start braking. If you must brake on the through lane, and
if there is traffic close behind you, you can allow a little \
extra time and flash your brake lights (in addition to
your turn signal) as extra warning that you are about to
slow down and exit.
The exit ramp can be curved, sometimes quite sharply.
The exit spwd is usually posted. Reduce your speed
according to your speedometer, not to your sense of
motion. After driving for any distance at higher speeds,
you may tend to think you are going slower than you
actually are. For example,
40 mph (65 h/h) might
seem like only
20 mph (30 km/h). Obviously, this. could
lead to serious trouble on a ramp designed for
20 mph
(30 km/h)!
Driving a Long Distance
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.
171

~ Before Leaving on a
Long Trip 0 Weather Forecasts: What’s the weather outlook along
your route? Should
you delay your trip a short time
Make sure you’re ready. Try to be well rested. If you to avoid a major storm system?
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 0 Maps: Do you have up-to-date maps?
I
of the journey. Wear comfortable clothing and shoes you
can easily drive in. On the Road
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
Buick 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:
0 Windshield Washer Fluid: Is the reservoir full? Are
all windows clean inside and outside?
0 Wiper Blades: Are they in good shape!
0 Fuel, Engine Oil, Other Fluids: Have you checked all
levels?
0 Lights: Are they all working? Are the lenses clean?
0 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? 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 refreshment
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.
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 centers with direct access to the highway, no passing zones and school zones, vehicles turning left and right off the road,
pedestrians, cyclists, parked vehicles. td 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.
172

As you go over the top of a hill, be alert. There could
be something in your lane, like a stalled car or an
accident. Parking on Hills
You may see highway signs on mountains that warn
of special problems. Examples are long grades,
passing or no-passing zones,
a falling rocks area, or
winding roads. Be alert to these and take appropriate
action.
Winter driving can present special problems. See ,
“Winter Driving” in the Index.
Hills and mountains mean spectacular scenery. But
please be careful where you stop if you decide to look at
the view or take pictures. Look for pull-offs or parking
areas provided for scenic viewing.
Another part of this manual tells how to use your
parking brake (see “Parking Brake” in the Index). But
on a mountain or steep hill, you can do one more thing.
You can turn your front wheels to keep your vehicle
from rolling downhill or out into traffic.
175