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.
5-67
Tire Chains
{CAUTION:
Don’t use tire chains. There’s not enough
clearance. Tire chains used on a vehicle
without the proper amount of clearance can
cause damage to the brakes, suspension or
other vehicle parts. The area damaged by the
tire chains could cause you to lose control of
your vehicle and you or others may be injured
in a crash. Use another type of traction device
only if its manufacturer recommends it for use
on your vehicle and tire size combination and
road conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it’s contacting your vehicle, and don’t
spin your wheels. If you do nd traction
devices that will t, install them on the front
tires for front-wheel-drive vehicles. If your
vehicle has all-wheel drive, install traction
devices on either the front tires or all four
tires, but never on the rear tires only.
Accessory In ator
Your vehicle may have an accessory in ator. With it, you
can in ate things like air mattresses and basketballs, and
you can also use it to bring your tires up to the proper
pressure.
The accessory in ator is located in the rear
compartment on the driver’s side. To remove the cover,
pull the tab on the cover and pull it off.
This is the symbol on the
accessory in ator switch.
There may be an accessory in ator kit stored in the
glove box. It includes a 20-foot (6 m) hose with an air
pressure gage and nozzle adapters.
5-70
Instrument Panel (cont.)
Overview..................................................... 3-4
Switchbank.................................................3-20
Integrated Windshield Antenna........................3-135
Interior Lamps................................................3-16
Interior Lamps Control.....................................3-16
J
Jump Starting.................................................5-42
K
Keyless Entry System....................................... 2-5
Keys............................................................... 2-3
L
Labelling, Tire Sidewall....................................5-56
Lamps
Battery Run-Down Protection.........................3-20
Cargo........................................................3-19
Exterior......................................................3-14
Fog ...........................................................3-15Lamps (cont.)
Front Reading.............................................3-19
Interior.......................................................3-16
Interior Control............................................3-16
Rear Reading.............................................3-19
LATCH System
Child Restraints...........................................1-58
Securing a Child Restraint Designed for the
LATCH System........................................1-60
Level Control..................................................4-38
Liftgate..........................................................2-11
Light
Airbag Readiness........................................3-41
Anti-Lock Brake System Warning...................3-45
Brake System Warning.................................3-44
Highbeam On.............................................3-49
Malfunction Indicator....................................3-46
Passenger Airbag Status Indicator..................3-42
Safety Belt Reminder...................................3-41
TCS Warning Light......................................3-45
Traction Control System (TCS) Warning..........3-45
Lighting
Delayed.....................................................3-18
Entry.........................................................3-17
Exit...........................................................3-18
Perimeter...................................................3-19
8
Tires (cont.)
Inspection and Rotation................................5-64
Installing the Spare Tire................................5-80
Removing the Flat Tire.................................5-80
Removing the Spare Tire and Tools...............5-74
Secondary Latch System..............................5-84
Storing a Flat or Spare Tire and Tools............5-88
Tire Sidewall Labelling..................................5-56
Tire Terminology and De nitions....................5-58
Uniform Tire Quality Grading.........................5-67
Wheel Alignment and Tire Balance.................5-68
Wheel Replacement.....................................5-68
When It Is Time for New Tires......................5-65
Top Strap......................................................1-53
Top Strap Anchor Location...............................1-54
Towing
Recreational Vehicle.....................................4-36
Towing a Trailer..........................................4-38
Your Vehicle...............................................4-36
Traction
Active Message...........................................3-52
Control System (TCS)..................................4-10
Control System Warning Light.......................3-45
Service Traction System Warning Message.....3-51
Transaxle
Fluid, Automatic...........................................5-22Transaxle Operation, Automatic.........................2-23
Trip Odometer................................................3-39
Turn and Lane-Change Signals.......................... 3-7
Turn Signal/Multifunction Lever........................... 3-7
U
Ultrasonic Rear Parking Assist (URPA)...............3-24
Understanding Radio Reception.......................3-134
Uniform Tire Quality Grading............................5-67
V
Vehicle
Control........................................................ 4-6
Damage Warnings........................................... iv
Design......................................................... 4-2
Service Soon Message.................................3-59
Symbols......................................................... iv
Vehicle Data Collection and Event Data
Recorders..................................................7-10
Vehicle Identi cation
Number (VIN)............................................5-103
Service Parts Identi cation Label..................5-103
15
