Page 308 of 386

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 temporaryuse 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.
5-60 Service and Appearance Care
ProCarManuals.com
Page 311 of 386

CAUTION (Continued)
The area damaged by the tire
chains could cause you to lose
control of the 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 the
vehicle and tire size combination
and road conditions. Follow that
manufacturer’s instructions. To
help avoid damage to the vehicle,
drive slowly, readjust or remove
the device if it is contacting the
vehicle, and do not spin the
vehicle’s wheels. If you do nd
traction devices that will t, install
them on the front tires.
If a Tire Goes Flat
It is unusual for a tire to blowout
while you are driving, especially if
you maintain your vehicle’s tires
properly. If air goes out of a tire, it is
much more likely to leak out slowly.
But if you should ever have a
blowout, here are a few tips about
what to expect and what to do:
If a front tire fails, the at tire creates
a drag that pulls the vehicle toward
that side. Take your foot off the
accelerator pedal and grip the
steering wheel rmly. Steer to
maintain lane position, and then
gently brake to a stop well out of
the traffic lane.
A rear blowout, particularly on a
curve, acts much like a skid and may
require the same correction you
would use in a skid. In any rear
blowout remove your foot from the
accelerator pedal. Get the vehicle
under control by steering the
way you want the vehicle to go.It may be very bumpy and noisy, but
you can still steer. Gently brake to a
stop, well off the road if possible.
{CAUTION
Lifting a vehicle and getting under
it to do maintenance or repairs is
dangerous without the appropriate
safety equipment and training. If a
jack is provided with the vehicle, it
is designed only for changing a
at tire. If it is used for anything
else, you or others could be badly
injured or killed if the vehicle slips
off the jack. If a jack is provided
with the vehicle, only use it for
changing a at tire.
If a tire goes at, the next part
shows how to use the jacking
equipment to change a at tire
safely.
Service and Appearance Care 5-63
ProCarManuals.com
Page 381 of 386

Lights (cont.)
Reduced Engine Power.....3-39
Safety Belt Reminders.......3-28
Security...........................3-38
Service Vehicle Soon........3-40
StabiliTrak
®Indicator.........3-33
Tire Pressure...................3-34
Traction Control System
(TCS) Warning..............3-33
Warning, Power Steering . . . 3-33
Loading Your Vehicle............4-28
Locks
Automatic Door Lock.......... 2-8
Automatic Door Unlock........ 2-8
Delayed Locking................. 2-8
Door ................................. 2-7
Lockout Protection.............. 2-8
Power Door ....................... 2-8
Rear Door Security Locks.... 2-8
Loss of Control....................4-12
Low Fuel Warning Light........3-41
Low Washer Fluid Warning
Light...............................3-40
Lower Anchors and Tethers
for Children......................1-31
Luggage Carrier...................2-43
Lumbar
Manual Controls................. 1-5
M
Maintenance
Footnotes.......................... 6-8
Maintenance Schedule
Additional Required
Services........................ 6-6
At Each Fuel Fill..............6-10
At Least Once a Month.....6-10
At Least Once a Year.......6-11
Maintenance Record.........6-17
Maintenance Replacement
Parts...........................6-15
Maintenance Requirements . . . 6-1
Owner Checks and
Services.......................6-10
Recommended Fluids and
Lubricants....................6-13
Scheduled Maintenance....... 6-3
Using............................... 6-2
Your Vehicle and the
Environment................... 6-1
Malfunction Indicator Lamp....3-35
Manual Lumbar Controls......... 1-5
Manual Seats........................ 1-3
Message
DIC Warnings and
Messages....................3-49Mirrors
Automatic Dimming
Rearview......................2-29
Manual Rearview Mirror.....2-29
Outside Convex Mirror.......2-30
Outside Heated Mirrors......2-30
Outside Power Mirrors.......2-29
MP3 ...................................3-75
N
Navigation System, Privacy . . . 7-17
Navigation/Radio System,
see Navigation Manual......3-81
Net
Convenience....................2-44
New Vehicle Break-In...........2-15
O
Odometer...........................3-28
Odometer, Trip.....................3-28
Off-Road .............................4-13
Driving............................4-13
Recovery.........................4-11
INDEX i-7
ProCarManuals.com
Page 385 of 386

Tire
Pressure Light..................3-34
Tires..................................5-43
Aluminum Wheels,
Cleaning......................5-77
Buying New Tires.............5-58
Chains............................5-62
Changing a Flat Tire.........5-64
Cleaning..........................5-77
Compact Spare................5-71
Different Size...................5-59
High-Speed Operation.......5-50
If a Tire Goes Flat............5-63
In ation - Tire Pressure.....5-49
Inspection and Rotation.....5-56
Installing the Spare Tire.....5-66
Pressure Monitor
Operation.....................5-53
Pressure Monitor System . . . 5-51
Removing the Flat Tire......5-66
Removing the Spare Tire
and Tools.....................5-65
Sidewall Labeling..............5-44
Storing a Flat or Spare
Tire and Tools...............5-70
Terminology and
De nitions....................5-46Tires (cont.)
Uniform Tire Quality
Grading.......................5-60
Wheel Alignment and
Tire Balance.................5-61
Wheel Replacement..........5-62
When It Is Time for
New Tires....................5-57
Towing
Recreational Vehicle..........4-32
Towing a Trailer................4-35
Your Vehicle.....................4-32
Traction
Control System (TCS)......... 4-8
Control System Warning
Light............................3-33
StabiliTrak
®System............ 4-7
Transmission
Fluid, Automatic................5-18
Transmission Operation,
Automatic................2-19, 2-22
Transportation, Courtesy......... 7-9
Trip Odometer.....................3-28
Turn and Lane-Change
Signals............................. 3-6
Turn Signal/Multifunction
Lever................................ 3-6
U
Uniform Tire Quality Grading . . . 5-60
Universal Home Remote
System...........................2-37
Operation........................2-37
V
Vehicle
Control............................. 4-4
Design.............................. 4-2
Loading...........................4-28
Running While Parked.......2-28
Service Soon Light...........3-40
Symbols.............................. iii
Vehicle Customization, DIC....3-57
Vehicle Data Recording and
Privacy............................7-16
Vehicle Data Recording,
Radio Frequency (RFID)....7-17
Vehicle Identi cation
Number (VIN)...................5-79
Service Parts
Identi cation Label.........5-79
Vehicle, Remote Start............. 2-5
Ventilation Adjustment...........3-24
Visors.................................2-11
INDEX i-11
ProCarManuals.com