1996 CHEVROLET TRACKER traction control

Cruise Control (Option)
" I
With cruise control, you can maintain a speed of about
25 mph (40 kmh) or more without keeping your foot on
the accelerator.
This can really help on long trips. Cmise
control does not work at speeds below about 25 mph
(40 kw-h).
When you apply your brakes, or push the clutch pedal
if you have a manual transmission, the cruise control
shuts off.
A CAUTION:
II-
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.
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.
Cruise control can be dangerous on
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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.
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 apply the brakes. Both control
systems
-- steering and braking -- have to do
their work where the tires meet the road. Unless
you
have four-wheel anti-lock brakes, adding the hard
braking can demand too much
of those places. You
can lose control.
The same thing can happen if you’re steering through
a
sharp curve. and 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? Ease up on the
brake or 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” though 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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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 Geo’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, ease your foot
off the
accelerator pedal and quickly steer the way you want
the
vehicle to go. If you start steering quickly enough, your
vehicle may straighten
out. Always be ready for a
second
skid if it occurs.
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.
mle 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
enough water, ice
or packed snow on the road to make a
“,mirrored surface”
-- and slow down when you have
any doubt.
If you have the anti-lock braking system, remember: It
helps avoid only the braking skid. If you do not have
anti-lock, then in a braking skid (where the wheels are
no longer rolling), release enough pressure
on the brakes
to get the wheels rolling again. This restores steering
control. Push the brake pedal down steadily when you
have
to stop suddenly. As long as the wheels are rolling,
you will have steering control.
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Controlling your vehicle is the key to successful
off-road driving. One
of the best ways to control your
vehicle is to control your speed. Here are some things to
keep in mind.
At higher speeds:
you approach things faster and you have less time to
scan the terrain for obstacles.
0 you have less time to react.
you have more vehicle bounce when you drive
you’ll need more distance for braking, especially
over
obstacles.
since you’re on an unpaved surface.
~~
~
When you’re driving off-road, bouncing and
quick changes in direction can easily throw you
out of position. This could cause
you to lose
control and crash.
So, whether you’re driving on
or off the road,
you and your passengers should
wear safety belts.
Scanning the Terrain
Off-road driving can take you over many different
kinds
of terrain. You need to be familiar with the
terrain and its many different features. Here are some
things to consider.
Surface Conditions. Off-roading can take you over
hard-packed dirt, gravel, rocks, grass, sand, mud, snow
or ice. Each of these surfaces affects the steering,
acceleration and braking
of your vehicle in different
ways. Depending upon the kind of surface you
are
on, you may experience slipping, sliding, wheel
spinning, delayed acceleration, poor traction and
Surface Obstacles. Unseen or hidden obstacles can
be hazardous. A rock, log, hole, rut or bump can
startle you if you’re not prepared for them. Often
these obstacles are hidden
by grass, bushes, snow or
even the rise and fall of the terrain itself. Here are some
things to consider:
I longer braking distances.
0 Is the path ahead clear?
0 Will the surface texture change abruptly up ahead?
I Does the travel take you uphill or downhill? (There’s
more discussion of
these subjects later.)
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Driving on Off-Road Hills
Off-road driving often takes you up, down or across a
hill. Driving safely on hills requires good judgment and
an understanding of what your vehicle can and can’t do.
Tke are some hills that simply can’t be driven, no
matter how well built the vehicle.
‘ A CAUTION:
Many hills are simply too steep for any vehicle. If
you drive up them, you will stall. If you drive
down them,
you can’t control your speed. If you
drive across them, you will roll over. You could be
seriously injured or killed.
If you have any doubt
about the steepness, don’t drive the hill.
Approaching a Hill
When you approach a hill, you need to decide if it’s one
of those hills that’s just too steep to climb, descend or
cross. Steepness can be hard to judge. On a very small
hill, for example, there may be a smooth, constant
incline with only a small change
in elevation where you
1
can easily see all the way to the top. On a large hill, the
incline may get steeper as you near the top, but you
may
not see this because the crest of the hill is hidden by
bushes, grass or shrubs.
Here are some other things to consider as you approach
a hill.
0
0
0
0
0
0
Is there a constant incline, or does the hill get sharply
steeper in places?
Is there good traction on the hillside, or will the
surface cause tire slipping?
Is there a straight path up or down the
hill so you
won’t have to make turning maneuvers?
Are there obstructions on the hill that can block your
path (boulders, trees, logs or ruts)?
What’s beyond the hill?
Is there a cliff, an
embankment, a drop-off, a fence? Get out and
walk
the hill if you don’t know. It’s the smart way
to find out.
Is the hill simply too rough? Steep hills often have
ruts, gullies,
troughs and exposed rocks because they
are more susceptible to the effects of erosion.
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Driving in Mud, Sand, Snow or Ice
When you drive in mud, snow or sand, your wheels
won’t get good traction. You can’t accelerate as
quickly, turning is more difficult, and you’ll need
bnger braking distances.
It’s best to use a low gear when you’re in mud
-- the
deeper the mud, the lower the gear.
In really deep mud,
the idea
is to keep your vehicle moving so you don’t
get stuck.
When you drive on sand, you’ll sense a change
in wheel
traction. But it will depend upon how loosely packed the
sand
is.- On loosely packed sand (as on beaches or sand
dunes) your tires will tend to sink into the sand. This has
an effect on steering, accelerating and braking. You may
want to reduce the air pressure in your tires slightly
when driving on sand. This will improve traction. Hard packed
snow and ice offer the worst tire traction.
On these surfaces, it’s very easy to lose control. On wet
ice, for example, the traction is
so poor that you will
have difficulty accelerating. And if you do get moving,
poor steering and difficult braking can cause you to slide
out
of control.
c
A CAUTION:
-
Driving on frozen lakes, ponds or rivers can be
dangerous. Underwater springs, currents under
the ice,
or sudden thaws can weaken the ice. Your
vehicle could fall through the ice and you and your passengers could drown. Drive
your vehicle
on safe surfaces only.
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Buying New Tires
To find out what kind and .size of tires you need, look at
the Tire-Loading Information label.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specification
(TPC Spec)
number on each tire’s sidewall. When you get new tires,
get ones with that same
TPC Spec number. That way
your vehicle will continue to have tires that are designed
to give proper endurance, handling, speed rating,
traction, ride and other things during normal service
on
your vehicle. If your tires have an all-season tread
design, the TPC number will be followed by an “MS”
(for mud and snow).
If you ever replace your tires with those not having a
TPC Spec number, make sure they are the same size,
load range, speed rating and construction type (bias,
bias-belted or radial)
as your original tires.
Mixing tires could cause you to lose control while
driving. If
you mix tires of different sizes or types
(radial and bias-belted tires), the vehicle
may not
handle properly, and
you could have a crash.
Using tires of different sizes may also cause
damage
to your vehicle. Be sure to use the same
size and type tires on all wheels.
Uniform Tire Quality Grading
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires
by
treadwear, traction and temperature performance.
(This applies only to vehicles sold
in the United States.)
The grades are molded on the sidewalls
of most
passenger car tires. The Uniform Tire Quality Grading
system does not apply to deep tread, winter-type snow
tires, space-saver or temporary use spare tires, tires with
nominal
rim diameters of 10 to 12 inches (25 to 30 cm),
or to some limited-production tires.
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While the tires available on General Motors passenger
cars and light trucks
may vary with respect to these
grades, they must also conform to Federal safety
requirements and additional General Motors Tire
Performance Criteria
(TPC) standards.
Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions on a specified government test course. For
example, a tire graded
150 would wear one and a half
(1 1/2) times as well on the government course as a tire
graded 100. The relative performance of tires depends
upon the actual conditions of their use, however, and
may depart significantly from the nom due to variations
in driving habits, service practices
and differences in
road characteristics and climate.
Traction -- A, B, C
The traction grades, from highest to lowest, are A, B, and
C, and they represent the tire’s ability to stop on wet
pavement as measured under controlled conditions on
specified government test surfaces of asphalt and concrete.
A tire marked C may have poor traction performance. Warning:
The traction grade assigned to this tire
is based
on braking (straightahead) traction tests and does not
include cornering (turning) traction,
Temperature -- A, B, C
The temperature grades are A (the highest), B, and C,
representing the tire’s resistance to the generation of
heat and its ability to dissipate heat when tested under
controlled conditions on, a specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce tire life, and
excessive temperature can lead to sudden tire failure.
The grade
C corresponds to a level of perfol’mance
which all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard No. 109. Grades
B and
A represent higher levels of performance on the
laboratory test wheel than the minimum required by law.
Warning:
The temperature grade for this tire is
established for a tire that is properly inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading,
either separately or in combination,
can cause heat buildup and possible tire failure.
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