Uniform Tire Quality Grading
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
section width. For example:
Treadwear 200 Traction AA Temperature A
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 speci®ed government test course.
For example, a tire graded 150 would wear one and
a half (1.5) 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 signi®cantly from the norm
due to variations in driving habits, service practices and
differences in road characteristics and climate.
Traction ± AA, A, B, C
The traction grades, from highest to lowest, are AA, A,
B, and C. Those grades represent the tire's ability
to stop on wet pavement as measured under controlled
conditions on speci®ed 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 straight-ahead braking
traction tests, and does not include acceleration,
cornering, hydroplaning, or peak traction characteristics.
5-66
Inspection......................................................6-15
Brake System.............................................6-15
Engine Cooling System................................6-15
Exhaust System..........................................6-14
Fuel System...............................................6-15
Part C - Periodic Maintenance.......................6-14
Steering, Suspension and Front Drive Axle
Boot and Seal.........................................6-14
Throttle System...........................................6-15
Instrument Panel Brightness.............................3-17
Instrument Panel Fuse Block
(Passenger's Side).......................................5-94
Instrument Panel Fuse Block (Driver's Side).......5-92
Instrument Panel.............................................3-31
Cluster.......................................................3-31
Overview..................................................... 3-4
Interior Lamps................................................3-17
J
Jump Starting.................................................5-48
K
Key Lock Cylinders Service..............................6-11
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Lamps...........................................................3-15
Exterior......................................................3-15
Interior.......................................................3-17
Lap-Shoulder Belt...................................1-16, 1-24
LATCH System...............................................1-41
Child Restraints...........................................1-41
Securing a Child Restraint Designed for the
LATCH System........................................1-43
Latches, Seatback............................................ 1-6
Leaving Your Vehicle With the Engine
Running.....................................................2-26
Leaving Your Vehicle.......................................2-10
Light.............................................................3-34
Air Bag Readiness.......................................3-34
Anti-Lock Brake System Warning...................3-37
Brake System Warning.................................3-36
Cruise Control.............................................3-43
Malfunction Indicator....................................3-38
Oil Pressure Indicator...................................3-42
Safety Belt Reminder...................................3-34
TCS Warning Light......................................3-37
Traction Control System (TCS) Warning..........3-37
Loading Your Vehicle.......................................4-32
Lockout Protection..........................................2-10
8
Traction.........................................................3-45
Active Message...........................................3-45
Control System (TCS).................................... 4-8
Control System Warning Light.......................3-37
Service Traction System Warning
Message.................................................3-44
Trailer Brakes.................................................4-37
Transaxle Operation, Automatic.........................2-21
Transaxle.......................................................5-24
Fluid, Automatic...........................................5-24
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-10
Transmitter Veri®cation...................................... 2-5
Transportation Options...................................... 7-7
Trip Computer................................................3-55
Trip Odometer................................................3-33
TRNKJAMB (Trunk Jamb)................................2-48
Trunk Ajar Warning Message............................3-49
Trunk Assist Handle........................................2-11
Trunk Lock....................................................2-11
Trunk............................................................2-10
Turn and Lane-Change Signals.......................... 3-8
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-39U
Underbody Flushing Service.............................6-13
Underhood Fuse Block (Lower).........................5-97
Underhood Fuse Block (Upper).........................5-96
Understanding Radio Reception........................3-91
Uniform Tire Quality Grading............................5-66
United States ± Customer Assistance.................. 7-4
Used Replacement Wheels..............................5-68
Using Cleaner on Fabric..................................5-83
Using HomeLink
ž...........................................2-38
V
Vehicle Identi®cation........................................5-90
Number (VIN).............................................5-90
Service Parts Identi®cation Label...................5-90
Vehicle Personalization....................................2-41
Vehicle Storage..............................................5-47
Vehicle............................................................ 4-5
Control........................................................ 4-5
Customization Settings.................................3-94
Damage Warnings........................................... iv
Loading......................................................4-32
Service Soon Message.................................3-51
Symbols......................................................... iv
Visor Vanity Mirrors.........................................2-14
Visors...........................................................2-14
Voltmeter Gage..............................................3-35
15
