2003 OLDSMOBILE AURORA Owners Manual

There is a gender difference, too. Women generally
have a lower relative percentage of body water
than men. Since alcohol is carried in body water, this
means that a woman generally will reach a higher BAC
level than a man of her same body weight when
each has the same number of drinks.
The law in an increasing number of U.S. states, and
throughout Canada, sets the legal limit at
0.08 percent.
In some other countries, the limit is even lower. For
example, it is
0.05 percent in both France and Germany.
The BAC limit for all commercial drivers in the United
States is
0.04 percent.
The BAC will be over
0.1 0 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.
But 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 a collision
increases sharply for drivers who have a BAC of
0.05 percent or above. A driver with a BAC level of
0.06 percent has doubled his or her chance of having a
collision. At a BAC level of 0.10 percent, the chance
of this driver having a collision is 12 times greater; at a
level of
0.15 percent, the chance is 25 times greater!
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.
“1’11 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 even a moderate 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, especially injuries to the brain, spinal
cord or heart. This means that when anyone who
has been drinking
- driver or passenger - is in a
crash, that person’s chance of being killed or
permanently disabled is higher than
if the person haa
not been drinking.
4-4
ProCarManuals.com

Drinking and t n d ing is very dangerous.
Your reflexes, perceptions, attentiveness and
judgement can be affected by even a small
amount of alcohol. You can have a serious-or
even fatal-collision if you drive after drinking.
Please don’t drink and drive or ride with a
driver who has been drinking. Ride home
in a
cab; or if you’re with a group, designate a
driver who will not drink.
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.
4-5
ProCarManuals.com

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. Also see
Traction Control System
(TCS) on page
4-8.
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, 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; the condition
of your brakes; the weight of
the vehicle and the amount of brake force applied.
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.
4-6
ProCarManuals.com

Anti-lock Brake System (ABS)
Your vehicle has anti-lock brakes. ABS is an advanced
electronic braking system that will help prevent a
braking skid.
When you start your engine and begin to drive away.
your anti-lock brake system will check itself. You
may hear a momentary motor or clicking noise while
this test is going on, and you may even notice that your
brake pedal moves a little. This is normal.
If there’s a problem with
the anti-lock brake system,
this warning light will
stay on. See
Anti-Lock
Brake System Warning
Light on page
3-36.
Let’s say the road is wet and you’re driving safely.
Suddenly, an animal jumps out in front of you. You slam
on the brakes and continue braking. 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 both 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
4-7
ProCarManuals.com

conditions. This can help you steer around the obstacle
while braking hard.
As you brake, your computer keeps receiving updates
on wheel speed and controls braking pressure
accordingly.
Remember: Anti-lock doesn’t change the time you need
to get your foot up to the brake pedal or always
decrease stopping distance.
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.
Using Anti-Lock
Don’t pump the brakes. Just hold the brake pedal down
firmly and let anti-lock work for you. You may hear a
motor or clicking nosie during a hard stop, but this
is normal.
Braking in Emergencies
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.
Traction Control System (TCS)
Your vehicle may have a traction control system that
limits wheel spin. This is especially useful in slippery
road conditions. The system operates only
if it senses
that one or both of the front wheels are spinning
or
beginning to lose traction. When this happens,
the system works the front brakes and reduces engine
power to limit wheel spin.
4-8
ProCarManuals.com

TRAC
ON
United States Canada
This light will come on when your traction control
system is limiting wheel spin. See
Traction Control
System Active Light
on page 3-38.
You may feel or hear the system working, but this is
normal.
If your vehicle is in cruise control when the traction
control system begins to limit wheel spin, the cruise
control will automatically disengage. When road
conditions allow you to safely use it again, you may
reengage the cruise control. See “Cruise Control” under
Turn SignaVMultifunction Lever on page 3-6.
TRAC
OFF
United States Canada
This light should come on briefly when you start the
engine.
If it stays on or comes on while you are driving,
there’s a problem with your traction control system.
See
Traction Control System (TCS) Warning Light on
page 3-37. When this warning light is on, the system will
not limit wheel spin. Adjust your driving accordingly.
The traction control system automatically comes
on whenever you start your vehicle. To limit wheel spin,
especially in slippery road conditions, you should
always leave the system on. But you can turn the
traction control system
off if you ever need to. You
should turn the system
off if your vehicle ever gets stuck
in sand, mud or snow and rocking the vehicle is
required. See “Rocking Your Vehicle To Get It Out”
under
If You Are Stuck: In Sand, Mud, Ice or Snow on
page 4-32.
4-9
ProCarManuals.com

To turn the system off,
press the TC button on the
center console.
The traction control system warning light will come on
and stay on. If the system is limiting wheel spin
when you press the button, the warning light will come
on
- but the system won’t turn off right away. It will
wait until there’s no longer a current need
to limit
wheel spin.
You can turn the system back on at any time by
pressing the button again. The traction control system
warning light should go
off.
Steering
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.
Magnetic-Speed Variable Assist
Steering
Your vehicle is equipped with a steering system that
continuously adjusts the effort you feel when steering at
all vehicle speeds. It provides ease when parking,
yet
a firm, solid feel at highway speeds.
4-1 0
ProCarManuals.com

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
~II slddenly 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. See
Traction Control System (TCS) on page 4-8.
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.
If you have Stabilitrak@, you may see the STABILITY
ACTIVE message on the Driver Information Center. See
“Stability Active Message” under
DIC Warnings and
Wlessages on page
3-50.
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.
4-1 1
ProCarManuals.com