tires PONTIAC FIREBIRD 1995 Owner's Manual

Inflation - Tire Pressure
The Tire-Loading Information label which is 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 a mile.
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 k Pa). When you end this very high speed
driving, reduce the “cold” inflation pressures to those
listed
on the tire loading information label.
Don’t let anyone tell you that underinnation or
overinflation
is all right. It’s not. If’ your tires don’t
have enough
air (underinflation) you can get:
Too much flexing
Too much heat
Tire overloading
Bad wear
0 Bad handling
Bad fuel economy.
(Continued)
NOTICE: (Continued)
If your tires have too much air (overinflation),
you can get:
Unusual wear
Bad handling
Rough ride
0 Needless damage from road hazards.
. ., .. ,
When to Check
Check your tires once a month or more.
Don’t forget your compact spare tire. It should be at
60 psi (420 kPa).
How to Check
Use a good quality pocket-type gage to check tire
pressure. Simply looking at the tires will not tell you the
pressure, especially if you have radial tires
-- which
may look properly inflated even
if they’re underinflated.
If your tires have valve caps, be sure to put them back
on. They help prevent leaks by keeping ou,t 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 Services” in the Index for scheduled
rotation intervals.
I I 1
If you don’t have P245/5OZR16 Goodyear Eagle GS-C
tires, use the rotation pattern shown above for your tires.
n
If you have P245/5OZR16 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
both sidewalls. 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. I I
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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.
When it’s Time 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.
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You need a new tire if
0
0
e
0
0
You can see the indicators at three or more places
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.
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.
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
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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.)
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 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. 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 (straight-ahead) 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 performance
which
all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard
No. 109. Grades
€3 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.
These grades are molded on the sidewalls of passenger
car tires.
While the tires available as standard or optional
equipment on General Motors vehicles may vary with
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respect to these grades, all such tires meet General
Motors performance standards and have been approved
for use on General Motors vehicles. All passenger type
(P Metric) tires must conform to Federal safety
requirements in addition
to these grades.
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
aligned 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.
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NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling,
speedometer/odometer calibration, headlamp
aim, bumper height, vehicle ground clearance,
and tire or tire chain clearance to the body and
chassis.
Used Replacement Wheels
Tire Chains
NOTICE:
If your Pontiac has P235/55R16, or P245/50ZR16
size tires, don’t use tire chains; they can dqpage
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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Cleaning Your Convertible Top
NOTICE:
When using an automatic car wash, set your
heating or cooling system to “VENT” with the
fan speed set to the second highest speed. This
will prevent high pressure water from entering
around your top.
Your convertible top should be cleaned often. Use a
mild soap, lukewarm water and a soft brush. Don’t use
any harsh cleaners or bleaching agents on the top. They
can darnage the material.
When the top is really dirty, use a mild foam-type
cleaner. Use a cloth or sponge to remove the dirt.
Thoroughly rinse the top and dry it before lowering it.
A damp top causes wrinkles.
Aluminum Wheels (If So Equipped)
Your aluminum wheels have a protective coating similar
to the painted surface of your car. Don’t use strong
soaps, chemicals, chrome polish, abrasive cleaners
or
abrasive cleaning brushes on them because you could
damage this coating, After rinsing thoroughly, a wax
may be applied.
NOTICE:
If you have aluminum wheels, don’t use an
automatic car wash that has hard silicon carbide
cleaning brushes. These brushes can take the
protective coating
off your aluminum wheels.
Tires
To clean your tires, use a stiff brush with a tire cleaner.
When applying a tire dressing always take care to wipe
off any overspray or splash from painted surfaces.
Petroleum-based products may damage the paint finish.
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I Maintenance Schedule I I
6,000 Miles (10 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
0 Lubricate the steering linkage. Lubricate the
transmission shift linkage (or every
6 months, whichever occurs first).
Rotate tires. See “Tire Inspection and
Rotation” in the Index for proper rotation
pattern and additional information.
DATE ACTUAL MILEAGE ISERVICED BY:
7,500 Miles (12 500 km)
Change the reat axle gear lubricant if
vehicle is used
fi, pull a trailer or has
limited-slip differential.
..
DATE SERVICED BY: ACTUAL MILEAGE
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I Maintenance Schedule I I
18,000 Miles (30 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service,
0 Lubricate the steering linkage. Lubricate the
transmission shift linkage (or every
6 months, whichever occurs first).
0 Rotate tires. See “Tire Inspection and
Rotation” in the Index for proper rotation
pattern and additional information.
DATE ACTUAL MILEAGE SERVICED BY:
- - I J
21,000 Miles (35 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Sewice.
DATE ACTUAL MILEAGE SERVICED BY:
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