
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 (1.5)
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 significantly 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 specified government test
surfaces of asphalt and concrete. A tire marked C
may have poor traction performance.
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. It should be noted that
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.
6-76

Used Replacement Wheels
{WARNING:
Putting a used wheel on the vehicle is dangerous.
You cannot know how it has been used or how
far it has been driven. It could fail suddenly and
cause a crash. If you have to replace a wheel,
use a new GM original equipment wheel.
Tire Chains
{WARNING:
If your vehicle has P215/70R16, P235/75R16,
P265/70R17, or P235/50R18 size tires, do not use
tire chains. They can damage your vehicle because
there is not enough clearance. Tire chains used on
WARNING: (Continued)
WARNING: (Continued)
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 is
contacting your vehicle. Do not spin the vehicle’s
wheels.
If you do find traction devices that will fit, install
them on the rear tires.
6-78

J
Jump Starting.................................................6-43
K
Keyless Entry
Remote (RKE) System................................... 3-3
Keyless Entry System....................................... 3-3
Keys............................................................... 3-2
L
Labeling, Tire Sidewall.....................................6-58
Lamps
Daytime Running (DRL)................................4-11
Dome ........................................................4-13
Dome Lamp Override...................................4-14
Exterior Cargo.............................................4-13
License Plate..............................................6-54
Malfunction Indicator....................................4-28
Lap Belt........................................................2-33
Lap-Shoulder Belt...........................................2-27
LATCH System for Child Restraints...................2-46
Latches, Seatback............................................ 2-9
Leaving After Parking on a Hill.........................5-59Leaving the Vehicle With the Engine Running
(Automatic Transmission)..............................3-32
Lighting
Exit...........................................................4-14
Lights
Airbag Readiness........................................4-22
Antilock Brake System (ABS) Warning............4-26
Brake System Warning.................................4-25
Charging System.........................................4-24
Cruise Control.............................................4-32
Exterior Lamps............................................4-10
Flash-to-Pass............................................... 4-5
Highbeam On.............................................4-32
High/Low Beam Changer................................ 4-5
Oil Pressure...............................................4-31
On Reminder..............................................4-11
Passenger Airbag Status Indicator..................4-23
Safety Belt Reminders..................................4-21
Security.....................................................4-32
StabiliTrak
®/Traction Control System (TCS)
Warning Light..........................................4-26
Tire Pressure..............................................4-28
Up-Shift.....................................................4-24
Limited-Slip Rear Axle....................................... 5-9
Loading Your Vehicle.......................................5-33
Loading Your Vehicle for Off-Road Driving..........5-14
9

Tires (cont.)
Changing a Flat Tire....................................6-80
Cleaning...................................................6-108
Different Size..............................................6-75
High-Speed Operation..................................6-65
If a Tire Goes Flat.......................................6-79
Inflation - Tire Pressure................................6-64
Inspection and Rotation................................6-71
Installing the Spare Tire................................6-85
Pressure Light.............................................4-28
Pressure Monitor Operation...........................6-67
Pressure Monitor System..............................6-66
Removing the Flat Tire.................................6-85
Removing the Spare Tire and Tools...............6-81
Secondary Latch System..............................6-93
Sidewall Labeling.........................................6-58
Spare Tire................................................6-101
Storing a Flat or Spare Tire and Tools............6-96
Terminology and Definitions...........................6-61
Uniform Tire Quality Grading.........................6-75
Wheel Alignment and Tire Balance.................6-77
Wheel Replacement.....................................6-77
When It Is Time for New Tires......................6-72
To Use the Engine Coolant Heater....................3-20
Torque Lock (Automatic Transmission)...............3-32
Total Weight on the Vehicle’s Tires....................5-54Towing
Recreational Vehicle.....................................5-41
Towing a Trailer..........................................5-48
Trailer Recommendations..............................5-60
Your Vehicle...............................................5-41
TPMS Malfunction Light and Message...............6-68
TPMS Sensor Matching Process.......................6-69
TRAC (Traction) OFF......................................4-41
Traction
Control System (TCS).................................... 5-8
Limited-Slip Rear Axle.................................... 5-9
StabiliTrak®System....................................... 5-6
TRACTION FAULT ..........................................4-41
Traction – AA, A, B, C.....................................6-76
Trailer
Towing Recommendations.............................5-60
Trailer Brakes.................................................5-55
Trailer Wiring Harness.....................................5-60
Transfer Case................................................6-48
Transmission
Fluid, Automatic...........................................6-21
Fluid, Manual..............................................6-25
Transmission Operation, Automatic....................3-21
Transmission Operation, Manual........................3-23
Transportation Options.....................................8-10
Transportation Program, Courtesy......................8-10
16

Traveling to Remote Areas...............................5-15
Treadwear.....................................................6-76
Treadwear 200 Traction AA Temperature A.........6-75
Trip Information..............................................4-34
Trip Odometer................................................4-20
Truck-Camper Loading Information....................5-40
Turn and Lane-Change Signals.......................... 4-4
TURN SIGNAL ...............................................4-41
Turn Signal/Multifunction Lever........................... 4-4
Turn Signals When Towing a Trailer..................5-57
Two-Tiered Loading.........................................5-40
U
Uniform Tire Quality Grading............................6-75
United States................................................... 8-6
Up-Shift Light.........................................3-24, 4-24
Used Replacement Wheels..............................6-78
Using ABS....................................................... 5-5
V
Vehicle
Control........................................................ 5-3
Loading......................................................5-33
Parking Your...............................................3-33
Running While Parked..................................3-34
Symbols......................................................... ivVehicle Data Recording and Privacy..................8-16
Vehicle Identification
Number (VIN)............................................6-110
Service Parts Identification Label..................6-110
Vehicle Personalization....................................1-16
Vehicle Storage..............................................6-42
Ventilation Adjustment......................................4-18
Visors...........................................................3-12
W
Warning Lights, Gages, and Indicators...............4-18
Warnings
DIC Warnings and Messages........................4-37
Hazard Flashers............................................ 4-3
Safety and Symbols......................................... iv
Weight of the Trailer........................................5-49
Weight of the Trailer Tongue.............................5-52
Weight-Distributing Hitches and Weight Carrying
Hitches......................................................5-55
What Kind of Engine Oil to Use........................6-17
What to Do with Used Oil ................................6-19
What to Use ..................6-30, 6-37, 6-38, 6-47, 6-49
Wheels
Alignment and Tire Balance..........................6-77
Different Size..............................................6-75
Replacement...............................................6-77
When It Is Time for New Tires..........................6-72
17