2010 PONTIAC G6 tire size

Driving for Better Fuel Economy
Driving habits can affect fuel mileage. Here are some
driving tips to get the best fuel economy possible.
•Avoid fast starts and accelerate smoothly.
•Brake gradually and avoid abrupt stops.
•Avoid idling the engine for long periods of time.
•When road and weather conditions are appropriate,
use cruise control, if equipped.
•Always follow posted speed limits or drive more
slowly when conditions require.
•Keep vehicle tires properly inflated.
•Combine several trips into a single trip.
•Replace the vehicle’s tires with the same TPC Spec
number molded into the tire’s sidewall near the size.
•Follow recommended scheduled maintenance.
Roadside Assistance Program
U.S.:1-800-ROADSIDE (762-3743)
TTY Users:1-888-889-2438
Canada:1-800-268-6800
As the owner of a new Pontiac, you are automatically
enrolled in the Roadside Assistance program. This
program provides technically trained advisors who are
available 24 hours a day, 365 days a year, minor repair
information or towing arrangements.
Roadside Assistance and OnStar
If you have a current OnStar subscription, press the
OnStar button and the current GPS location will be sent
to an OnStar Advisor who will assess your problem,
contact Roadside Assistance, and relay exact location to
get you the help you need.
Pontiac Owner Center
The Pontiac Owner Center is a complimentary service
that includes online service reminders, vehicle
maintenance tips, online owner manual, special
privileges and more.
Sign up today at:www.gmownercenter.com/pontiac
(U.S.) orwww.gm.ca(Canada).
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Tire and Loading Information Label
A vehicle specific Tire and Loading Information
label is attached to the vehicle’s center
pillar (B-pillar). With the driver door open,
you will find the label attached below the
door lock post (striker). The Tire and Loading
Information label lists the number of occupant
seating positions (A), and the maximum vehicle
capacity weight (B) in kilograms and pounds.The Tire and Loading Information label also lists the
tire size of the original equipment tires (C) and the
recommended cold tire inflation pressures (D).
For more information on tires and inflation, see
Tires on page 6-56andInation - Tire Pressure
on page 6-64.
There is also important loading information on the
Certification label. It tells you the Gross Vehicle
Weight Rating (GVWR) and the Gross Axle Weight
Rating (GAWR) for the front and rear axle, see
“Certification Label” later in this section.
Steps for Determining Correct Load
Limit
1.Locate the statement “The combined weight
of occupants and cargo should never exceed
XXX kg or XXX lbs” on your vehicle’s
placard.
2.Determine the combined weight of the driver
and passengers that will be riding in your
vehicle.
3.Subtract the combined weight of the driver
and passengers from XXX kg or XXX lbs.
Label Example
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Center High-Mounted
Stoplamp (CHMSL) (Retractable Hardtop
and Coupe)..............................................6-50
Taillamps, Turn Signal, Sidemarker, Stoplamps
and Back-up Lamps (Sedan)........................6-50
Taillamps, Turn Signal, Sidemarker, Stoplamps
and Back-up Lamps (Coupe)........................6-51
Taillamps, Turn Signal, Sidemarker, Stoplamps
and Back-up Lamps (Retractable Hardtop)......6-53
License Plate Lamp......................................6-54
Replacement Bulbs.......................................6-54
Windshield Wiper Blade Replacement..............6-55
Tires..............................................................6-56
Winter Tires.................................................6-57
Tire Sidewall Labeling...................................6-58
Tire Terminology and Definitions.....................6-61
Inflation - Tire Pressure.................................6-64
High-Speed Operation...................................6-66
Tire Pressure Monitor System.........................6-66
Tire Pressure Monitor Operation.....................6-67
Tire Inspection and Rotation...........................6-73
When It Is Time for New Tires.......................6-74
Buying New Tires.........................................6-75Different Size Tires and Wheels......................6-77
Uniform Tire Quality Grading..........................6-78
Wheel Alignment and Tire Balance..................6-79
Wheel Replacement......................................6-79
Tire Chains..................................................6-81
If a Tire Goes Flat........................................6-81
Tire Sealant and Compressor Kit....................6-82
Tire Sealant and Compressor Kit Storage.........6-89
Changing a Flat Tire.....................................6-90
Removing the Spare Tire and Tools................6-91
Removing the Flat Tire and Installing the
Spare Tire................................................6-93
Storing a Flat or Spare Tire and Tools............6-99
Compact Spare Tire....................................6-106
Appearance Care..........................................6-107
Interior Cleaning.........................................6-107
Fabric/Carpet..............................................6-108
Leather......................................................6-109
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................6-109
Care of Safety Belts....................................6-110
Weatherstrips.............................................6-110
Washing Your Vehicle..................................6-110
Section 6 Service and Appearance Care
6-2

Low-Prole Performance Tire
If your vehicle has P225/50R18 or P225/50R17 size
tires, they are classified as low-profile performance
tires. These tires are designed for very responsive
driving on wet or dry pavement. You may also
notice more road noise with low-profile performance
tires and that they tend to wear faster.
Notice:If the vehicle has low-prole tires,
they are more susceptible to damage from
road hazards or curb impact than standard
prole tires. Tire and/or wheel assembly
damage can occur when coming into contact
with road hazards like, potholes, or sharp edged
objects, or when sliding into a curb. The vehicle
warranty does not cover this type of damage.
Keep tires set to the correct ination pressure
and, when possible avoid contact with curbs,
potholes, and other road hazards.
Winter Tires
If your vehicle has P225/50R18 size tires, they are
classified as low-profile performance tires. These tires
are designed for very responsive driving on wet or dry
pavement. If you expect to drive on snow or ice covered
roads often, you may want to get winter tires for your
vehicle. The low-profile performance tires may not
offer the traction you would like or the same level of
performance as winter tires on snow or ice covered
roads.
Winter tires, in general, are designed for increased
traction on snow and ice covered roads. With winter
tires, there may be decreased dry road traction,
increased road noise and shorter tire tread life. After
switching to winter tires, be alert for changes in vehicle
handling and braking.
See your retailer for details regarding winter tire
availability and proper tire selection. Also, seeBuying
New Tires on page 6-75
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If you choose to use winter tires:
•Use tires of the same brand and tread type on all
four wheel positions.
•Use only radial ply tires of the same size, load
range, and speed rating as your original equipment
tires.
Winter tires with the same speed rating as your original
equipment tires may not be available for H, V, W
and ZR speed rated tires. If you choose winter tires with
a lower speed rating, never exceed the tire’s maximum
speed capability.
Tire Sidewall Labeling
Useful information about a tire is molded into its
sidewall. The examples below show a typical
passenger vehicle tire and a compact spare tire
sidewall.
(A) Tire Size
:The tire size is a combination of
letters and numbers used to define a particular
tire’s width, height, aspect ratio, construction
type, and service description. See the “Tire Size”
illustration later in this section for more detail.Passenger (P-Metric) Tire Example
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(B) TPC Spec (Tire Performance Criteria
Specication):Original equipment tires designed
to GM’s specific tire performance criteria have a
TPC specification code molded onto the sidewall.
GM’s TPC specifications meet or exceed all federal
safety guidelines.
(C) DOT (Department of Transportation)
:The Department of Transportation (DOT) code
indicates that the tire is in compliance with the
U.S. Department of Transportation Motor Vehicle
Safety Standards.
(D) Tire Identication Number (TIN)
:The letters
and numbers following DOT (Department of
Transportation) code is the Tire Identification
Number (TIN). The TIN shows the manufacturer
and plant code, tire size, and date the tire was
manufactured. The TIN is molded onto both sides
of the tire, although only one side may have the
date of manufacture.
(E) Tire Ply Material
:The type of cord and
number of plies in the sidewall and under the tread.
(F) Uniform Tire Quality Grading (UTQG)
:Tire
manufacturers are required to grade tires based
on three performance factors: treadwear, traction,
and temperature resistance. For more information
seeUniform Tire Quality Grading on page 6-78.(G) Maximum Cold Ination Load Limit
:Maximum load that can be carried and the
maximum pressure needed to support that load.
(A) Temporary Use Only
:The compact
spare tire or temporary use tire has a tread life of
approximately 3,000 miles (5 000 km) and should
not be driven at speeds over 65 mph (105 km/h).
The compact spare tire is for emergency use
when a regular road tire has lost air and gone flat.Compact Spare Tire Example
6-59

If your vehicle has a compact spare tire, see
Compact Spare Tire on page 6-106andIf a Tire
Goes Flat on page 6-81.
(B) Tire Ply Material
:The type of cord and
number of plies in the sidewall and under
the tread.
(C) Tire Identication Number (TIN)
:The letters
and numbers following the DOT (Department of
Transportation) code is the Tire Identification
Number (TIN). The TIN shows the manufacturer
and plant code, tire size, and date the tire was
manufactured. The TIN is molded onto both sides
of the tire, although only one side may have the
date of manufacture.
(D) Maximum Cold Ination Load Limit
:Maximum load that can be carried and the
maximum pressure needed to support that load.
(E) Tire Ination
:The temporary use tire or
compact spare tire should be inflated to 60 psi
(420 kPa). For more information on tire pressure
and inflation seeInation - Tire Pressure on
page 6-64.
(F) Tire Size
:A combination of letters and
numbers define a tire’s width, height, aspect
ratio, construction type, and service description.
The letter T as the first character in the tire size
means the tire is for temporary use only.(G) TPC Spec (Tire Performance Criteria
Specication)
:Original equipment tires designed
to GM’s specific tire performance criteria have
a TPC specification code molded onto the sidewall.
GM’s TPC specifications meet or exceed all
federal safety guidelines.
Tire Size
The following illustration shows an example of a
typical passenger vehicle tire size.
(A) Passenger (P-Metric) Tire
:The United States
version of a metric tire sizing system. The letter P
as the first character in the tire size means a
passenger vehicle tire engineered to standards
set by the U.S. Tire and Rim Association.
(B) Tire Width
:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
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(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 60, as
shown in item C of the illustration, it would mean
that the tire’s sidewall is 60 percent as high as it
is wide.
(D) Construction Code
:A letter code is used
to indicate the type of ply construction in the tire.
The letter R means radial ply construction; the
letter D means diagonal or bias ply construction;
and the letter B means belted-bias ply construction.
(E) Rim Diameter
:Diameter of the wheel in
inches.
(F) Service Description
:These characters
represent the load index and speed rating of the
tire. The load index represents the load carry
capacity a tire is certified to carry. The speed
rating is the maximum speed a tire is certified
to carry a load.
Tire Terminology and Denitions
Air Pressure:The amount of air inside the
tire pressing outward on each square inch of
the tire. Air pressure is expressed in pounds
per square inch (psi) or kilopascal (kPa).
Accessory Weight
:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic transmission,
power steering, power brakes, power windows,
power seats, and air conditioning.
Aspect Ratio
:The relationship of a tire’s height
to its width.
Belt
:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead
:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
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