1998 PONTIAC GRAND PRIX Owners Manual

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
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 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.
4-8

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 feel a
slight brake pedal pulsation or notice some noise, but
this is normal.
When your anti-lock system
is adjusting brake pressure
to help avoid a braking skid,
this light will come on.
Traction Control System (With 3800
Supercharged Engine)
Your vehicle has 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.
LOW
TRAC
This light will come on
when your traction control system is limiting wheel
spin. See “Traction Control
System Warning Light” in
the index.
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” in the Index.)

This light should come on briefly when you start
comes on while
you are
driving, there’s a problem with your traction
control system.
TCS
OFF
the engine. If it stays on or
See “Traction Control System Warning Light” in the
Index. 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, ice or snow. See “Rocking Your Vehicle”
in the Index.)
To turn the system off,
press the TCS button on
the far right end of the
trip computer.
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 -- and the system will shut-off instantly. 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.
4-10

Enhanced Traction System
(3100 or 3800 Engine)
Your vehicle may have an Enhanced Traction System (ETS) 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 reduces engine power and may
also upshift the
transaxle
to limit wheel spin.
LOW
TRAC
This light will come on when your Enhanced
Traction System is limiting wheel spin. See “Enhanced
Traction
System Warning
Light
” in the index.
You may feel or hear the system working, but this
is normal.
The Enhanced Traction System operates in all transaxle
shift lever positions. But the system can upshift the
transaxle
only as high as the shift lever position you’ve
chosen,
so you should use the lower gears only when
necessary. See “Automatic Transaxle” in
the Index.
1
This warning light will
come
on to let you know if
there’s a problem with the TRAC
OFF
system.
See “Enhanced Traction System Warning Light” in the
Index. When this warning light is on, the system will not
limit wheel spin. Adjust your driving accordingly.
To limit wheel spin, especially in slippery road
conditions, you should always leave the Enhanced
Traction System on. But you can
turn the system off if
you ever need to. (You should turn the system off if your
vehicle ever gets stuck in sand, mud, ice or snow. See
“Rocking Your Vehicle” in the Index.)

When you turn the system off, the Enhanced Traction
System warning light
will come on and stay on. If the
Enhanced Traction System is limiting wheel spin when
you press the button to turn the system off, the warning
light will come on
-- and the system will shut-off
instantly. 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 Enhanced Traction System
warning light should go off.
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.
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.
Variable Effort Steering (Option)
This steering system provides lighter steering effort
for parking and when driving at speeds below
20 mph
(32 km/h). Steering effort will increase at higher speeds
for improved road feel.
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.
4-12

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. Refer to
“Enhanced Traction System” or “Traction Control
System”in the Index.
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 steerifig 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. (See “Braking in
Emergencies” earlier in this section.)
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.
4-13

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 a good reason to practice defensive driving at
all times and
wear safety belts properly.
Off-Road Recovery
You may find that your right wheels have dropped off the
edge
of a road onto the shoulder while you’re driving.
LEFT APPROX. WARTER TURN
edge of pamd wrfsco
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 one-quarter turn until the
right front tire contacts the pavement edge. Then turn your
steering wheel to go straight down the roadway.
4-14

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.
Watch for traffic signs, pavement markings and
lines. If you can see a sign up ahead that might
indicate a
turn or an intersection, delay your pass.
A broken center line usually indicates it’s all right to
pass (providing the road ahead is clear). Never cross a solid line on your side
of the lane or a double
solid line, even if the road seems empty of
approaching traffic.
Do not get too close to the vehicle you want to
pass while you’re awaiting an opportunity.
For one
thing, following too closely reduces your area
of
vision, especially if you’re following a larger
vehicle. Also, you won’t have adequate space
if the
vehicle ahead suddenly slows or stops. Keep
back a
reasonable distance.
When it looks like a chance to pass is coming up, start to accelerate but stay in the right lane and don’t
get too close. Time your move
so you will be
increasing speed as the time comes to move
into the
other lane. If the way
is clear to pass, you will have a
“running start” that more than makes up for the
distance you would lose by dropping back. And if
something happens to cause you to cancel your pass,
you need only slow down and drop back again and
wait for another opportunity.
If other cars are lined up to pass a slow vehicle, wait
your turn. But take care that someone isn’t trying to
pass you as you pull out to pass the slow vehicle.
Remember to glance over your shoulder and check
the blind spot.
4-15