tires PONTIAC FIREBIRD 1996 Owner's Manual

NOTICE:
Using the wrong fluid can badly damage
brake system parts. For example, just
a few
drops of mineral-based oil, such as engine
oil, in your brake system can damage brake
system parts
so badly that they’ll have to be
replaced. Don’t let someone put in the
wrong
kind of fluid.
If you spill brake fluid on your vehicle’s
painted surfaces, the paint finish can be
damaged. Be careful not
to spill brake fluid
on your vehicle.
If you do, wash it off
immediately. See “Appearance Care”
in the Index.
I
Brake Wear
Unless you have the four-wheel disc brake option, your
Pontiac 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 fiy).
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.
NOTICE:
Continuing to drive with worn-out brake pads
could result in costly brake repair.
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.
Free movement
of brake calipers and properly torqued
wheel nuts are necessary to help prevent brake
pulsation. When tires are rotated, inspect brake calipers
for movement, brake pads for wear, and evenly torque
wheel nuts in the proper sequence to
GM specifications.
If you have rear drum brakes, they don’t have wear
indicators, but if you ever hear a rear brake rubbing
noise, have the rear brake linings inspected. Also, the
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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 pe’dal
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 1,000 miles
(1 600 km), so your brakes will adjust properly.
If YOU brake pedal goes down farther than narmd, you
rear drum brakes may need adjustment. Adjust them by
backing up and firmly applying the brakes a few times.
Replacing Brake System Parts
The braking system on a modern vehicle is complex.
Its many parts have to be of top quality and work well
together if the vehicle is to have really good braking.
Vehicles we design and test have top-quality
GM brake
parts
in them, as your Pontiac does when it is new.
When
you replace parts of your braking system -- for
example, when your brake
linings wear down and you
have to have new ones
put in - be sure you get new
genuine
GM replacement parts. If you don’t, your
brakes my no longer work properly. For example, if
someone puts in brake linings that are wrong for your
vehicle, the balance between your front and rear brakes
can change - for the wme. The braking performance
you’ve come to expect can change in many other ways if
someone puts
in the wrong replacement brake parts.
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Tires
We don’t make tires. Your new Pontiac comes with
high-quality tires made
by a leading tire manufacturer.
If you ever have questions about your tire warranty and
where to obtain service, see your Pontiac Warranty
booklet for details.
Poorly maintained and improperly used tires
are dangerous.
Overloading’ your tires can cause overheating
as a result of too much friction. You codd
have an airout and a serious accident.
See “Loading Your Vehicle”
in the Index.
Underinflated tires pose the same danger as
overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.
cut, punctured or broken by a sudden
, : , .
impact -- such as when you hit a pothole.
Keep tires at
the recommended pressure.
Worn, old tires can cause accidents. If your
tread
is badly worn, or if your tires have
been damaged, replace them.
See ‘%flation -- Tire Pressure” in this sectiisa
for inflation pressure adjustment for higher
speed driving.
Overinflated tires are more likely to be IC -..&
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Inflation -- Tire Pressure
The Tire-Loading Information label, located on the
driver’s door, shows the correct inflation pressures for
your tires when they’re cold. “Cold“ means your vehicle\

has been sitting for
at least three hours or driven no
more than 1 mile ( 1.6 km).
If you’ll be driving at speeds higher than 100 mph
(160 km/h) where it is legal, raise the cold inflation
pressure
of each tire to 35 psi (240 Pa). When you end
this very high-speed driving, reduce the cold inflation
pressures to those listed on the Tire-Loading
Information label.
NOTICE:
~ ~~ ~~ ~
Don’t let anyone tell you that underinflation or
overinflation
is all right. It’s not. If your tires
don’t have enough air (underinflation),
you can
get the following:
Too much flexing
e Too much heat
0 Tire overloading
NOTICE: (Continued)
~ ~~~~
NOTICE: (Continued)
0 Bad wear
0 Bad handling
Bad fuel economy.
If your tires have too much air (overinflation),
you can get the following:
0 Unusual wear
Bad handling
0 Rough ride
Needless damage fram road hazards.
When to Check
Check your tires once a-month or more.
Don’t forget your compact spare tire. It should be
at 61) psi (420 kPa).
How to Check
Use a good quality pocket-type gage to check tire
pressure. You can’t tell if your tires are properly inflated
simply by looking at them.
Radial tires may look properly
inflated even when they’re underidlated.
Be sure to put the valve caps back on the valve stem.
They help prevent
leaks by keeping out dirt and moisture.
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Tire,Inspection and Rotation
Tires should be inspected every 6,000 to 8,000 miles
(10 000 to 13 000 km) for any signs of unusual wear.
If unusual wear is present, rotate your tires as soon as
possible and check wheel alignment. Also check for
damaged tires or wheels. See “When It’s Time for New
Tires” and “Wheel Replacement” later in this section
for
more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The first
rotation is the most important. See “Scheduled
Maintenance Servi~es” in the Index for scheduled
rotation intervals. If
you don’t
have P245/50ZR16 or P275/40ZR17
Goodyear Eagle
GS-C tires, use the rotation pattern
shown previously for your tires.
L
If you have P245/50ZR16 or P275/40ZR17 Goodyear
Eagle
GS-C tires, they must roll in a certain direction
for the best overall performance. The direction is shown
by an arrow on the sidewall. Because these tires
are
directional, they should be rotated as shown here. These
tires should only be moved from front to rear and rear to
front on the same side
of the vehicle.
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Don’t include the compact spare tire in your
tire rotation.
After the tires
have been rotated, adjust the front and
rear
inflation pressures as shown on the Tire-Loading
Information label. Make certain that all wheel nuts are
properly tightened. See “Wheel Nut Torque” in the Index.
I
Rust or dirt on a wheel, or on the parts to’ which
it is fastened, can make wheel nuts become loose
after a time. The wheel could come off and cause
an accident,
When you change a wheel, remove
any rust or
dirt from places where the wheel
attach.& to the vehicle. In an emergency, you can
use
a cloth or a paper towel to do this; but be
sure to use a scraper or wire brush later, if
you need to, to get all the rust or dirt off.
(See “Changing a Flat Tire” in the.Index.)

When It’s The for New Tires
One way to tell when it’s
time for new
tires is to
check the treadwear
indicators,
which will
appear when your
tires have
only 1/16 inch (1.6 mm) or
less of tread remaining.
You need
a new tire if any of the following statements
are true: . .. 1. .. . .. ...
You can see the indicators at three or more places
.. . ‘ : __ .I
around the tire.
You can see cord or fabric showing through the
tire’s
rubber.
The tread or sidewall is cracked, cut or snagged deep
enough to show cord or fabric.
The tire has a. bump, bulge or split.
The tire has a puncture, cut or other damage that can’t be
repaired well because of the size or location of the damage.
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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”
I>>.,.. ,.. ;: (for mud and snow). A. . > ..
I ‘, -. 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.
It’s all right to drive with your compact spare,
though.
It was developed for use on your vehicle.
.
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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.
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
I , conditions on a specified government test course. For
example,
a tire graded 150 would wear one and a half
(1 112) 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 norm 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 co’nditions 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 performame
which all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard
No. 109.
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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.
Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
In most cases, you will not need to have your wheels
aIigned again. However,
if you notice unusual tire wear
or your vehicle pulling one way or the other, the
alignment may need to be reset. If you notice your
vehicle vibrating when driving on a smooth road, your
wheels may need to be rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts and wheel nuts should be replaced. If the
wheel leaks air, replace it (except some aluminum wheels, which
can sometimes be repaired). See your
Pontiac dealer if any of these conditions exist.
Your dealer will know the kind
of wheel you need.
Each new wheel should have
the same load-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new
GM original
equipment parts. This way, you will be sure to have
the right wheel, wheel bolts and wheel nuts for your
Pontiac model.
Using the wrong replacement wheels, wheel bolts
or wheel nuts
on your vehicle can be dangerous.
It could affect the braking and handling of your vehicle, make your tires lose air and make you
lose control.
You could have a collision in which
you or others could be injured. Always use the correct wheel, wheel bolts and wheel nuts
for
replacement.
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Tire Chains
NOTICE:
The wrong wheel can also cause problems with
bearing life,
brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire
or tire
chain clearance to the body and chassis.
See “Changing a Flat Tire” in the Index for
more information.
Used Replacement Wheels
Putting a used wheel on your vehicle
is
dangerous. You can’t know how it’s been used or
how many miles
it’s been driven. It could fail
suddenly and cause an accident.
Hf you have to
replace a wheel, use a new GM original
equipment wheel.
NOTICE:
If your Pontiac has P235/55R16, P245/50ZRl6 or
P275/40ZR17 size tires, don’t use tire chains.
They can damage
your vehicle.
If you have other tires, use tire chains only where
legal
and only when you must. Use only SAE Class
“S” type chains that are the proper size for your
tires. Install them on the rear tires and tighten
them as tightly as possible with the ends securely
fastened. Drive slowly and follow the chain
manufacturer’s instructions.
If you can hear the
chains contacting your vehicle, stop and retighten
them.
If’ the contact continues, slow down until it
stops. Driving too fast or spinning the wheels with
chains on will damage your vehicle.
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