1998 PONTIAC FIREBIRD ESP

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
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.
%action -- 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 (straight ahead) traction tests and
does not include cornering (turning) traction.
6-50

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 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. Scheduled wheel alignment and wheel balancing are not
needed. 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
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.
6-51

Locks
Cylinders ................................... 7-33
Key Lock Cylinder Service ..................... 7-33
Low coolant Light .............................. 2-85
Low Oil Light ................................. 2-89
Low Traction Light ......................... 2-84, 4-9
Lubricants and Fluids ............................ 7-38
Lubrication Service, Body ........................ 7-33
........................................ Door 2-4
PowerDoor .................................. 2-5
LossofControl ................................ 4-14
Main Fuse Block .............................. 6-64
Maintenance. Normal Replacement Parts ............ 6-70
Maintenance Record ............................ 7-40
Maintenance Schedule ............................ 7- 1
Long Trip/Highway Definition ................... 7-6
Long TripMghway Intervals ..................... 7-6
Owner Checks and Services ..................... 7-32
Periodic Maintenance Inspections ................ 7-36
Recommended Fluids and Lubricants ............. 7-38
Scheduled Maintenance Services .................. 7-4
Short TripKity Definition ....................... 7-5
Short TripKity Intervals ........................ 7-5
Maintenance. Underbody ......................... 6-60
Maintenance When Trailer Towing ................. 4-38
Malfunction Indicator Lamp ...................... 2-85
Manual Front Seat ............................... 1-2
Manual Remote Control Mirror . . ............. 2-57
Manual Transmission
Check
7-33
Fivespeed .................................. 2-35
Fluid ....................................... 6-24
......................................
Operation ................................... 2-35
Shift Speeds ................................. 2-37
Starting Your Engine .......................... 2-26
Six Speed ...................................
Map Pocket ...................................
2-36
2-58
Methanol ...................................... 6-5
Mirrors
Convex Outside .............................. 2-58
Inside Daymight Rearview ..................... 2-57
Manual Remote Control ........................ 2-57
Outside Manual Adjustable ..................... 2-57
Power Remote Control ......................... 2-57
Multifunction Lever ............................. 2-46
Neutral, Automatic Transmission ................. 2-32
New Vehicle “Break-In” ......................... 2-23
Odometer .................................... 2-79
Odometer, Trip ................................. 2-79
Visorvanity ................................. 2-61
MountainRoads ................................ 4-23
Nightvision ................................... 4-16
Off-RoadRecovery ............................. 4-12
~~ .. 9-7