2008 PONTIAC G8 weight

A.Vehicle Capacity Weight
for Example 3=1,000 lbs
(453 kg).
B.Subtract Occupant
Weight 200 lbs
(91 kg)×5=1,000 lbs
(453 kg).
C.Available Cargo
Weight=0 lbs (0 kg).
Refer to the vehicle’s Tire and
Loading Information label for
specic information about
the vehicle’s capacity weightand seating positions. The
combined weight of the driver,
passengers, and cargo
should never exceed the
vehicle’s capacity weight.
Certication Label
A vehicle specic Certication
label, is attached to the driver
side center pillar. The label tells
you the gross weight capacity
of the vehicle, called the
Gross Vehicle Weight Rating
(GVWR). The GVWR includesthe weight of the vehicle, all
occupants, fuel, and cargo.
Never exceed the GVWR for the
vehicle, or the Gross Axle Weight
Rating (GAWR) for either the
front or rear axle.
And, if you do have a heavy load,
you should spread it out. See
“Steps for Determining Correct
Load Limit” earlier in this section.
{CAUTION
Do not load the vehicle any
heavier than the Gross
Vehicle Weight Rating
(GVWR), or either the
maximum front or rear Gross
Axle Weight Rating (GAWR).
If you do, parts on the vehicle
can break, and it can change
the way your vehicle handles.
These could cause you to
lose control and crash. Also,
overloading can shorten
the life of the vehicle.Example 3
Label Example
Driving and Operating 8-31
2008 - Pontiac G8 Owner Manual

If you put things inside the
vehicle — like suitcases,
tools, packages, or anything
else — they will go as fast as the
vehicle goes. If you have to
stop or turn quickly, or if there is
a crash, they will keep going.
{CAUTION
Things you put inside the
vehicle can strike and injure
people in a sudden stop or
turn, or in a crash.
Put things in the trunk of
your vehicle. In a trunk,
put them as far forward as
you can. Try to spread the
weight evenly.
(Continued)
CAUTION (Continued)
Never stack heavier
things, like suitcases,
inside the vehicle so that
some of them are above
the tops of the seats.
Do not leave an unsecured
child restraint in the
vehicle.
When you carry something
inside the vehicle, secure it
whenever you can.
Do not leave a seat folded
down unless you need to.
Fuel
Use of the recommended fuel is
an important part of the proper
maintenance of your vehicle.
To help keep the engine clean
and maintain optimum vehicle
performance, we recommend the
use of gasoline advertised as
TOP TIER Detergent Gasoline.
The 8th digit of the Vehicle
Identication Number (VIN) shows
the code letter or number that
identies your vehicle’s engine.
The VIN is at the top left of
the instrument panel. SeeVehicle
Identification Number (VIN) on
page 10-1.
8-32 Driving and Operating
2008 - Pontiac G8 Owner Manual

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.
Bias Ply Tire
:A pneumatic tire
in which the plies are laid at
alternate angles less than
90 degrees to the centerline of
the tread.
Cold Tire Pressure
:The
amount of air pressure in a tire,
measured in pounds per square
inch (psi) or kilopascals (kPa)
before a tire has built up heat
from driving. SeeInflation - Tire
Pressure on page 9-46.
Curb Weight
:The weight of a
motor vehicle with standard
and optional equipment including
the maximum capacity of fuel,
oil, and coolant, but without
passengers and cargo.DOT Markings
:A code
molded into the sidewall of a
tire signifying that the tire
is in compliance with the
U.S. Department of
Transportation (DOT) motor
vehicle safety standards.
The DOT code includes the Tire
Identication Number (TIN),
an alphanumeric designator
which can also identify the tire
manufacturer, production
plant, brand, and date of
production.
GVWR
:Gross Vehicle Weight
Rating. SeeLoading the Vehicle
on page 8-28.
GAWR FRT
:Gross Axle Weight
Rating for the front axle. See
Loading the Vehicle on
page 8-28.
Vehicle Service and Care 9-43
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GAWR RR:Gross Axle Weight
Rating for the rear axle. See
Loading the Vehicle on
page 8-28.
Intended Outboard
Sidewall
:The side of an
asymmetrical tire, that must
always face outward when
mounted on a vehicle.
Kilopascal (kPa)
:The metric
unit for air pressure.
Light Truck (LT-Metric) Tire
:A
tire used on light duty trucks
and some multipurpose
passenger vehicles.
Load Index
:An assigned
number ranging from 1 to 279
that corresponds to the load
carrying capacity of a tire.Maximum Ination
Pressure
:The maximum air
pressure to which a cold tire can
be inated. The maximum air
pressure is molded onto the
sidewall.
Maximum Load Rating
:The
load rating for a tire at the
maximum permissible ination
pressure for that tire.
Maximum Loaded Vehicle
Weight
:The sum of curb
weight, accessory weight,
vehicle capacity weight, and
production options weight.
Normal Occupant Weight
:The
number of occupants a vehicle
is designed to seat multiplied by
150 lbs (68 kg). SeeLoading
the Vehicle on page 8-28.
Occupant Distribution
:Designated seating positions.Outward Facing Sidewall
:The
side of an asymmetrical tire
that has a particular side
that faces outward when
mounted on a vehicle. The side
of the tire that contains a
whitewall, bears white lettering,
or bears manufacturer, brand,
and/or model name molding that
is higher or deeper than the
same moldings on the
other sidewall of the tire.
Passenger (P-Metric) Tire
:A
tire used on passenger cars and
some light duty trucks and
multipurpose vehicles.
Recommended Ination
Pressure
:Vehicle
manufacturer’s recommended
tire ination pressure as
shown on the tire placard. See
Inflation - Tire Pressure on
page 9-46andLoading
the Vehicle on page 8-28.
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2008 - Pontiac G8 Owner Manual

Radial Ply Tire:A pneumatic
tire in which the ply cords
that extend to the beads are laid
at 90 degrees to the centerline
of the tread.
Rim
:A metal support for a tire
and upon which the tire
beads are seated.
Sidewall
:The portion of a tire
between the tread and the bead.
Speed Rating
:An alphanumeric
code assigned to a tire
indicating the maximum speed
at which a tire can operate.
Traction
:The friction between
the tire and the road surface.
The amount of grip provided.
Tread
:The portion of a tire that
comes into contact with the road.Treadwear Indicators
:Narrow
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1/16 inch
(1.6 mm) of tread remains. See
When It Is Time for New Tires on
page 9-56.
UTQGS (Uniform Tire Quality
Grading Standards)
:A tire
information system that provides
consumers with ratings for a
tire’s traction, temperature, and
treadwear. Ratings are
determined by tire manufacturers
using government testing
procedures. The ratings are
molded into the sidewall of the
tire. SeeUniform Tire Quality
Grading on page 9-59.
Vehicle Capacity Weight
:The
number of designated seating
positions multiplied by 150 lbs
(68 kg) plus the rated cargo load.
SeeLoading the Vehicle on
page 8-28.Vehicle Maximum Load on the
Tire
:Load on an individual
tire due to curb weight,
accessory weight, occupant
weight, and cargo weight.
Vehicle Placard
:A label
permanently attached to a
vehicle showing the vehicle’s
capacity weight and the original
equipment tire size and
recommended ination pressure.
See “Tire and Loading
Information Label” under
Loading the Vehicle on
page 8-28.
Vehicle Service and Care 9-45
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Ination - Tire Pressure
Tires need the correct amount of
air pressure to operate
effectively.
Notice:Do not let anyone tell
you that under-ination or
over-ination is all right. It is
not. If your tires do not have
enough air (under-ination),
you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economyIf your tires have too much air
(over-ination), you can get
the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road
hazards
A vehicle specic Tire and
Loading Information label is
attached to the vehicle’s center
pillar, below the driver’s door
latch. This label lists the
vehicle’s original equipment tires
and the recommended cold
tire ination pressure for the tires
when they are cold. The
recommended cold tire ination
pressure, shown on the label,is the minimum amount of air
pressure needed to support your
vehicle’s maximum load
carrying capacity. For more
information regarding how much
weight your vehicle can carry,
seeLoading the Vehicle on
page 8-28.
How you load your vehicle
affects vehicle handling and ride
comfort. When driving with
less than the maximum load
capacity allowed for your vehicle,
you can set tire ination
pressure to the recommended
amounts shown in the following
chart. Never load your vehicle
with more weight than it
was designed to carry.
9-46 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

Tire SizeRecommended Cold Tire InationOccupant and Cargo Weight:
573 lbs (260 kg) or Less Occupant and Cargo Weight:
Up to 917 lbs (416 kg)
(Vehicle Capacity Weight)
Front Tires Rear Tires Front Tires Rear Tires
P245/45R18 96V 33 psi (230 kPa) 33 psi (230 kPa) 36 psi (250 kPa) 39 psi (270 kPa) 245/45R18 96V 36 psi (250 kPa) 36 psi (250 kPa) 36 psi (250 kPa) 39 psi (270 kPa)
245/40R19 94W 36 psi (250 kPa) 36 psi (250 kPa
)36 psi (250 kPa) 39 psi (270 kPa)
T155/80R17 111M (Compact Spare) 60 psi (420 kPa) 60 psi (420 kPa) 60 psi (420 kPa) 60 psi (420 kPa)
When to Check
Check your tires once a month
or more.
Do not forget the compact spare
tire, if your vehicle has one. It
should be at 60 psi (420 kPa).
For more information about
the vehicle’s compact spare tire,
see Compact Spare Tire on
page 9-79 . How to Check
Use a good quality pocket-type
gage to check tire pressure.
You can’t tell if your tires
are properly inated simply by
looking at them. Radial tires may
look properly inated even
when they’re underinated.
Check the tire’s ination
pressure when the tires are
cold. Cold means your vehicle
has been sitting for at least
three hours or driven no more
than 1 mile (1.6 km). Remove the valve cap from the
tire valve stem. Press the
tire gage rmly onto the valve to
get a pressure measurement.
If the cold tire ination pressure
matches the recommended
pressure on the Tire and
Loading Information label, no
further adjustment is necessary.
If the ination pressure is
low, add air until you reach the
recommended amount.
Vehicle Service and Care 9-47
2008 - Pontiac G8 Owner Manual

Tire SizeRecommended Cold Tire Ination
Occupant and Cargo Weight: 573 lbs (260 kg) or Less Occupant and Cargo Weight:
Up to 917 lbs (416 kg)
(Vehicle Capacity Weight)
Front Tires Rear Tires Front Tires Rear Tires
P245/45R18 96V 35 psi (240 kPa) 35 psi (240 kPa) 39 psi (270 kPa) 44 psi (300 kPa) 245/45R18 96V 36 psi (250 kPa) 36 psi (250 kPa) 39 psi (270 kPa) 44 psi (300 kPa)
245/40R19 94W 36 psi (250 kPa) 36 psi (250 kPa) 39 psi (270 kPa) 44 psi (300 kPa)
When you end this high-speed
driving, return the tires to the cold tire
ination pressure shown on the Tire
and Loading Information label. See
Loading the Vehicle on page 8-28
and Inflation - Tire Pressure on
page 9-46 .
Tire Pressure Monitor
System
The Tire Pressure Monitor System
(TPMS) uses radio and sensor
technology to check tire pressure
levels. The TPMS sensors monitor
the air pressure in your vehicle’s
tires and transmit tire pressure
readings to a receiver located in the
vehicle.
Each tire, including the spare (if
provided), should be checked
monthly when cold and inated to the
ination pressure recommended by
the vehicle manufacturer on the
vehicle placard or tire ination pressure label. (If your vehicle has
tires of a different size than the size
indicated on the vehicle placard or
tire ination pressure label, you
should determine the proper tire
ination pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a
tire pressure monitoring system
(TPMS) that illuminates a low tire
pressure telltale when one or
more of your tires is signicantly
under-inated.
Vehicle Service and Care 9-49
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