traction control GMC ENVOY DENALI 2006 Owner's Manual

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 (NHTSA), 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 (UTQG) 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 specied 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 signicantly 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 specied 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.
5-68

Tire Chains
{CAUTION:
Do not use tire chains. There is 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, re-adjust or remove the
device if it is contacting your vehicle, and do
not spin your wheels. If you do nd traction
devices that will t, install them on the
rear tires.
Accessory Inator
Your vehicle may have an accessory inator system.
You can inate things like basketballs and bicycle tires.
You can also use it to bring your tire pressure up to
the proper pressure. It is not designed to inate
large objects which will require more than ve minutes
to inate, such as an air mattress.
The accessory inator is
located in the rear
compartment on the
driver’s side of the vehicle
behind an access cover,
near the liftgate opening.
To remove the cover, push in on the tab to access
the inator.
5-71

Tires (cont.)
Inator, Accessory.......................................5-71
Inspection and Rotation................................5-63
Installing the Spare Tire................................5-78
Removing the Flat Tire.................................5-78
Removing the Spare Tire and Tools...............5-75
Secondary Latch System..............................5-84
Spare Tire..................................................5-92
Storing a Flat or Spare Tire and Tools............5-88
Tire Sidewall Labeling..................................5-56
Tire Terminology and Denitions....................5-59
Uniform Tire Quality Grading.........................5-68
Wheel Alignment and Tire Balance.................5-69
Wheel Replacement.....................................5-69
When It Is Time for New Tires......................5-65
Towing
Recreational Vehicle.....................................4-50
Towing a Trailer..........................................4-56
Your Vehicle...............................................4-50
Traction
StabiliTrak
®System....................................... 4-9
Transmission
Fluid, Automatic...........................................5-23
Transmission Operation, Automatic....................2-24
Trip Odometer................................................3-33
Turn and Lane-Change Signals.......................... 3-7
Turn Signal/Multifunction Lever........................... 3-7
U
Understanding Radio Reception.......................3-140
Uniform Tire Quality Grading............................5-68
Universal Home Remote System.......................2-51
Operation...................................................2-52
V
Vehicle
Control........................................................ 4-6
Damage Warnings........................................... iv
Loading......................................................4-45
Symbols......................................................... iv
Vehicle Customization, DIC..............................3-60
Vehicle Data Collection and Event
Data Recorders...........................................7-10
Vehicle Identication
Number (VIN)............................................5-101
Service Parts Identication Label..................5-101
Vehicle Personalization....................................2-62
Memory Seat..............................................2-62
Ventilation Adjustment......................................3-27
Visors...........................................................2-16
Voltmeter Gage..............................................3-38
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