Tire PONTIAC VIBE 2005 Service 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 Ination 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. SeeInation - Tire Pressure on page 5-64.
Curb Weight:This means 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
Your Vehicle on page 4-32.
GAWR FRT:Gross Axle Weight Rating for the front
axle, seeLoading Your Vehicle on page 4-32.
5-61

GAWR RR:Gross Axle Weight Rating for the rear axle,
seeLoading Your Vehicle on page 4-32.
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 may 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 Your Vehicle on page 4-32.
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 and
shown on the tire placard. SeeInation - Tire Pressure
on page 5-64andLoading Your Vehicle on page 4-32.
5-62

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.
SeeWhen It Is Time for New Tires on page 5-69.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 5-70.
Vehicle Capacity Weight:The number of designated
seating positions multiplied by 150 lbs (68 kg) plus
the rated cargo load. SeeLoading Your Vehicle
on page 4-32.
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 original equipment tire size
and recommended ination pressure. SeeLoading
Your Vehicle on page 4-32.
5-63

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 economy
If your tires have too much air (over-ination),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazardsA Tire and Loading Information label is attached to the
vehicle’s center pillar (B-pillar), below the driver’s
door latch. This label shows your vehicle’s original
equipment tires and the correct ination pressures for
your 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 additional information regarding how much weight
your vehicle can carry, and an example of the tire
and loading information label, seeLoading Your Vehicle
on page 4-32. How you load your vehicle affects
vehicle handling and ride comfort, never load your
vehicle with more weight than it was designed to carry.
When to Check
Check your tires once a month or more. Do not forget to
check the compact spare tire, it should be at 60 psi
(420 kPa). For additional information regarding
the compact spare tire, seeCompact Spare Tire on
page 5-86.
5-64

How to Check
Use a good quality pocket-type gage to check tire
pressure. You cannot tell if your tires are properly inated
simply by looking at them. Radial tires may look properly
inated even when they are under-inated. 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.
If you overll the tire, release air by pushing on the
metal stem in the center of the tire valve. Re-check the
tire pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and moisture.
Tire Pressure Monitor System
If your vehicle has this feature, it is designed to alert you
when the system detects a large change in the pressure
of one tire. The system cannot alert you before you drive
that a tire is low or at. You must begin driving before the
system will work properly. The system works with the
brake control system and is designed to detect
differences in the tire rotation speeds that are caused by
changes in tire pressure. The tire pressure monitoring
system does not replace normal tire maintenance,
seeTires on page 5-57,Tire Inspection and Rotation
on page 5-68andWhen It Is Time for New Tires on
page 5-69.
This light, on the instrument
panel cluster, comes on
when the tire pressure
monitoring system detects
a low-tire condition.
This light will also come on for a few seconds and
then go off when you turn the ignition to ON.
This indicates that the tire pressure monitoring system
is functioning properly. If the low-tire pressure
warning light comes on while driving your vehicle,
the system may have detected a low-tire condition.
5-65

You need to stop as soon as possible and check your
tires for damage. If a tire is at, seeIf a Tire Goes
Flat on page 5-74andChanging a Flat Tire on
page 5-75. Also check the tire pressure in all four tires,
and set them to the specied level shown on the tire
and loading label. SeeInation - Tire Pressure on
page 5-64for additional information.
Note:The tire pressure monitoring system on
your vehicle will warn you when one of your tires
is signicantly under-inated and when some
combinations of your tires are signicantly
under-inated. However, there are other combinations
of signicantly under-inated tires for which your
tire pressure monitoring system may not warn you.
These other combinations are relatively common,
accounting for approximately half the instances in
which vehicles have signicantly under-inated tires.
For example, your system may not warn you when both
tires on the same side or on the same axle of your
vehicle are signicantly under-inated. It is particularly
important, therefore, for you to check the tire pressure in
all of your tires regularly and maintain proper pressure.
In order for the tire pressure monitoring system to
work properly you will need to reset (initialize) the tire
pressure monitoring system. Any time you check and/or
adjust a tire’s pressure, repair or replace a tire or
wheel or rotate the tires the tire pressure monitor system
needs to be reset.Do not reset (initialize) the system without rst correcting
the cause of the low-tire condition. If the system is
reset when the tire pressures are incorrect, the system
will not function properly and may not alert you when
a tire is low.
To reset (initialize) the system:
1. Park the vehicle at a safe place and apply the
parking brake. Turn the engine off.
2. Turn the ignition to ON with the engine off.
3. If the low-tire pressure
warning light is on,
push the SET (reset)
button for a few
seconds. The low-tire
warning light should go
off. The reset button
is on the instrument
panel to the left of the
steering wheel.
5-66

4. Press and hold the SET (reset) button until the
low-tire warning light comes on and ashes
on/off three times. The tire pressure warning reset
button starts the reset (initialization) process.
If the low-tire pressure warning light does not ash
when you hold the reset button the system may
be malfunctioning and needs service. See your
GM dealer for service.
The system completes the reset (initialization) process
after driving at vehicle speeds of at least 19 mph
(30 km/h) to 62 mph (100 km/h) for more than one hour.
Do not push the SET (reset) button while driving,
if you do the initialization process will not be performed.
The initialization process can take up to approximately
one hour of driving under the following conditions:
The vehicle speed is between 31 mph (50 km/h)
and 62 mph (100 km/h).
The roads are dry, smooth and straight.
The number of passengers is one or two
(including the driver).The low-tire pressure warning light may not come on
even if the tire ination pressure is low, or it may come
on when the tire ination pressure is set correctly
under the following circumstances:
A compact spare tire, snow tires, or tire chains
are installed on your vehicle.
The tires are over-inated, or the tire ination
pressure suddenly drops due to a tire bursting
or other causes.
The vehicle is driven on a slippery road surface
such as rough or frozen roads.
The vehicle speed is less than 19 mph (30 km/h),
and the driving duration is less than ve minutes.
The tires are made by a different manufacturer
or differ in tread pattern than the original
equipment tires.
Rapid acceleration/deceleration or multiple
consecutive sharp turns.
Towing a trailer.
The vehicle is loaded over the limit or not
balanced properly.
The initialization (reset) procedure was not performed
correctly after replacing or rotating tires or wheels.
The outside temperature is below 32°F (0°C) or
above 104°F (40°C).
5-67

Tire Inspection and Rotation
Tires should be rotated every 5,000 to 8,000 miles
(8 000 to 13 000 km).
Any time you notice unusual wear, rotate your tires
as soon as possible and check wheel alignment.
Also check for damaged tires or wheels. SeeWhen It
Is Time for New Tires on page 5-69andWheel
Replacement on page 5-72for more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The rst rotation
is the most important. SeePart A: Scheduled
Maintenance Services on page 6-4for scheduled
rotation intervals.
When rotating your tires, always use the correct rotation
pattern shown here.
Tires should only be moved from front to rear and
rear to front on the same side of the vehicle.
Do not include the compact spare tire in your tire
rotation.
5-68

After the tires have been rotated, adjust the front and
rear ination pressures to the amounts shown on
the Tire and Loading Information label. Make certain
that all wheel nuts are properly tightened. See “Wheel
Nut Torque” underCapacities and Specications on
page 5-100.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel could
come off and cause an accident. When you
change a wheel, remove any rust or dirt from
places where the wheel attaches to the vehicle.
In an emergency, you can use a cloth or a
paper towel to do this; but be sure to use a
scraper or wire brush later, if you need to,
to get all the rust or dirt off. SeeChanging a
Flat Tire on page 5-75.
Vehicles equipped with a tire pressure monitoring
system will need to reset (initialize) the system after
each tire rotation. SeeTire Pressure Monitor System
on page 5-65.
When It Is Time for New Tires
One way to tell when it’s
time for new tires is to
check the treadwear
indicators, which will
appear when your tires
have only 1/16 inch
(1.6 mm) or less of
tread remaining.
You need a new tire if any of the following statements
are true:
You can see the indicators at three or more places
around the tire.
You can see cord or fabric showing through the
tire’s rubber.
The tread or sidewall is cracked, cut or snagged
deep enough to show cord or fabric.
The tire has a bump, bulge or split.
The tire has a puncture, cut or other damage that
can’t be repaired well because of the size or
location of the damage.
5-69

Buying New Tires
To nd out what kind and size of tires you need, look at
the Tire and Loading Information label. For more
information about this label and where to nd it,
seeLoading Your Vehicle on page 4-32.
Make sure the replacements are the same size,
load capacity, speed rating and construction type
(bias, bias-belted or radial) as your original tires.
{CAUTION:
Mixing tires could cause you to lose control
while driving. If you mix tires of different sizes
or types (radial and bias-belted tires), the
vehicle may not handle properly, and you
could have a crash. Using tires of different
sizes may also cause damage to your vehicle.
Be sure to use the same size and type tires
on all wheels. It’s all right to drive with your
compact spare temporarily, it was developed
for use on your vehicle. SeeCompact Spare
Tire on page 5-86.
{CAUTION:
If you use bias-ply tires on your vehicle, the
wheel rim anges could develop cracks after
many miles of driving. A tire and/or wheel
could fail suddenly, causing a crash. Use only
radial-ply tires with the wheels on your vehicle.
Uniform Tire Quality Grading
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
selection width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the Unites States National Highway Traffic
Safety Administration, 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 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.
5-70