tires PONTIAC G8 2008 User Guide

Before Leaving on a
Long Trip
To prepare your vehicle for a long
trip, consider having it serviced
by your dealer/retailer before
departing.
Things to check on your own include:
Windshield Washer Fluid:
Reservoir full? Windows
clean — inside and outside?
Wiper Blades:In good shape?
Fuel, Engine Oil, Other Fluids:
All levels checked?
Lamps:Do they all work and are
lenses clean?
Tires:Are treads good? Are tires
inated to recommended
pressure?
Weather and Maps:Safe to
travel? Have up-to-date maps?
Highway Hypnosis
Always be alert and pay attention to
your surroundings while driving.
If you become tired or sleepy, nd a
safe place to park your vehicle
and rest.
Other driving tips include:
Keep the vehicle well ventilated.
Keep interior temperature cool.
Keep your eyes moving — scan
the road ahead and to the sides.
Check the rearview mirror and
vehicle instruments often.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving
on at or rolling terrain. Tips for
driving in these conditions include:
Keep the vehicle serviced
and in good shape.
Check all uid levels and brakes,
tires, cooling system, and
transmission.
Going down steep or long hills,
shift to a lower gear.
{CAUTION
If you do not shift down, the
brakes could get so hot that
they would not work well. You
would then have poor braking
or even none going down a hill.
You could crash. Shift down to
let the engine assist the brakes
on a steep downhill slope.
8-24 Driving and Operating
2008 - Pontiac G8 Owner Manual

{CAUTION
Coasting downhill in N (Neutral)
or with the ignition off is
dangerous. The brakes will
have to do all the work of
slowing down and they could
get so hot that they would not
work well. You would then have
poor braking or even none
going down a hill. You could
crash. Always have the engine
running and the vehicle in gear
when going downhill.
Stay in your own lane. Do not
swing wide or cut across the
center of the road. Drive at
speeds that let you stay in your
own lane.
Top of hills: Be alert — something
could be in your lane (stalled car,
accident).
Pay attention to special road
signs (falling rocks area, winding
roads, long grades, passing or
no-passing zones) and take
appropriate action.
Winter Driving
Here are some tips for winter driving:
Have your vehicle in good shape
for winter.
You might want to put winter
emergency supplies in your
vehicle.
Include an ice scraper, a small
brush or broom, a supply of
windshield washer uid, a rag,
some winter outer clothing, a small
shovel, a ashlight, a red cloth,
and reective warning triangles.
And, if you will be driving under
severe conditions, include a small
bag of sand, a piece of old carpet, or
a couple of burlap bags to help
provide traction. Be sure you
properly secure these items in
your vehicle.
Also seeTires on page 9-39.
Driving and Operating 8-25
2008 - Pontiac G8 Owner Manual

Driving on Snow or Ice
Most of the time, those places
where the tires meet the road
probably have good traction.
However, if there is snow or ice
between the tires and the road, you
can have a very slippery situation.
You have a lot less traction, or grip,
and need to be very careful.
What is the worst time for this?
Wet ice. Very cold snow or ice can
be slick and hard to drive on. But wet
ice can be even more trouble
because it can offer the least traction
of all. You can get wet ice when it is
about freezing, 32°F (0°C), and
freezing rain begins to fall. Try to
avoid driving on wet ice until salt and
sand crews can get there.
Whatever the condition — smooth
ice, packed, blowing, or loose
snow — drive with caution.
Accelerate gently. Try not to break
the fragile traction. If you accelerate
too fast, the drive wheels will spin
and polish the surface under the tires
even more.The Antilock Brake System (ABS)
improves your vehicle’s stability
when you make a hard stop
on a slippery road. Even though you
have ABS, begin stopping sooner
than you would on dry pavement.
SeeAntilock Brake System (ABS)
on page 8-15.
Allow greater following distance
on any slippery road.
Watch for slippery spots.
The road might be ne until you
hit a spot that is covered with ice.
On an otherwise clear road, ice
patches can appear in shaded
areas where the sun cannot
reach, such as around clumps of
trees, behind buildings, or under
bridges. Sometimes the surface of
a curve or an overpass can
remain icy when the surrounding
roads are clear. If you see a patch
of ice ahead of you, brake before
you are on it. Try not to brake
while you are actually on the ice,
and avoid sudden steering
maneuvers.
If You Are Caught in a Blizzard
If you are stopped by heavy
snow, you could be in a serious
situation. You should probably stay
with your vehicle unless you
know for sure that you are near help
and you can hike through the
snow. Here are some things to do
to summon help and keep yourself
and your passengers safe:
Turn on the hazard warning
ashers.
Tie a red cloth to your vehicle to
alert police that you have been
stopped by the snow.
Put on extra clothing or wrap a
blanket around you. If you do
not have blankets or extra
clothing, make body insulators
from newspapers, burlap
bags, rags, oor mats — anything
you can wrap around yourself
or tuck under your clothing
to keep warm.
You can run the engine to keep
warm, but be careful.
8-26 Driving and Operating
2008 - Pontiac G8 Owner Manual

{CAUTION
Snow can trap exhaust gases
under your vehicle. This can
cause deadly CO (carbon
monoxide) gas to get inside.
CO could overcome you and
kill you. You cannot see it or
smell it, so you might not know
it is in your vehicle. Clear away
snow from around the base of
your vehicle, especially any
that is blocking the exhaust
pipe. And check around again
from time to time to be sure
snow does not collect there.
Open a window just a little on
the side of the vehicle that is
away from the wind. This will
help keep CO out.Run your engine only as long as you
must. This saves fuel. When you run
the engine, make it go a little faster
than just idle. That is, push the
accelerator slightly. This uses less
fuel for the heat that you get and it
keeps the battery charged. You will
need a well-charged battery to
restart the vehicle, and possibly
for signaling later on with the
headlamps. Let the heater run
for a while.
Then, shut the engine off and close
the window almost all the way to
preserve the heat. Start the engine
again and repeat this only when you
feel really uncomfortable from the
cold. But do it as little as possible.
Preserve the fuel as long as you can.
To help keep warm, you can get out
of the vehicle and do some fairly
vigorous exercises every half hour or
so until help comes.
If Your Vehicle is Stuck
in Sand, Mud, Ice,
or Snow
Slowly and cautiously spin the
wheels to free the vehicle when
stuck in sand, mud, ice, or snow.
SeeRocking Your Vehicle to Get It
Out on page 8-28.
{CAUTION
If you let your vehicle’s tires
spin at high speed, they can
explode, and you or others
could be injured. The vehicle
can overheat, causing an
engine compartment re or
other damage. Spin the wheels
as little as possible and avoid
going above 35 mph (55 km/h)
as shown on the speedometer.
For information about using tire
chains on the vehicle, seeTire
Chains on page 9-62.
Driving and Operating 8-27
2008 - Pontiac G8 Owner Manual

Tire and Loading Information
Label
A vehicle specic Tire and
Loading Information label is
attached to the vehicle’s center
pillar (B-pillar). With the driver’s
door open, you will nd the
label attached near the door
lock post. The Tire and Loading
Information label shows thenumber of occupant seating
positions (A), and the maximum
vehicle capacity weight (B) in
kilograms and pounds.
The Tire and Loading
Information label also shows
the tire size of the original
equipment tires (C) and the
recommended cold tire ination
pressures (D). For more
information on tires and ination
seeTires on page 9-39and
Inflation - Tire Pressure on
page 9-46.
There is also important loading
information on the Certication
label. It tells you the Gross
Vehicle Weight Rating (GVWR)
and the Gross Axle Weight
Rating (GAWR) for the front and
rear axle. See “Certication
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
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.
4.The resulting gure equals
the available amount of
cargo and luggage load
capacity. For example,
if the “XXX” amount equals
1400 lbs and there will
be ve 150 lb passengers in
your vehicle, the amount
of available cargo and
luggage load capacity is
650 lbs (1400−750
(5 x 150) = 650 lbs).
Label Example
Driving and Operating 8-29
2008 - Pontiac G8 Owner Manual

Vehicle Service
and Care
Service
Service...............................9-2
Accessories and
Modications.....................9-3
California Proposition 65
Warning............................9-3
California Perchlorate
Materials Requirements.....9-3
Doing Your Own
Service Work....................9-4
Adding Equipment to the
Outside of the Vehicle......9-4
Owner Checks
Owner Checks....................9-5
Hood Release.....................9-5
Engine Compartment
Overview...........................9-6
Engine Oil..........................9-8
Engine Oil Life System.....9-10
Engine Air Cleaner/Filter. . .9-11
Automatic Transmission
Fluid................................9-13
Engine Coolant.................9-13
Radiator Pressure Cap......9-15
Engine Overheating...........9-16
Cooling System.................9-17
Power Steering Fluid.........9-21
Windshield Washer Fluid. . .9-22
Windshield Wiper Blade
Replacement...................9-23
Brakes..............................9-24
Battery..............................9-26
Headlamp Aiming
Headlamp Aiming..............9-27
Bulb Replacement
Bulb Replacement.............9-29
Halogen Bulbs..................9-29
Headlamps and Parking
Lamps.............................9-29
Taillamps..........................9-31
Replacement Bulbs...........9-32
Electrical System
Add-On Electrical
Equipment.......................9-32
Headlamp Wiring..............9-33
Windshield Wiper Fuses. . . .9-33
Power Windows and
Other Power Options. . . . . . .9-33
Instrument Panel Fuse
Block...............................9-33
Engine Compartment
Fuse Block......................9-35
Rear Compartment Fuse
Block...............................9-38
Tires
Tires.................................9-39
Tire Sidewall Labeling. . . . . . .9-40
Tire Terminology and
Denitions.......................9-43
Ination - Tire Pressure. . . .9-46
High-Speed Operation. . . . . . .9-48
Tire Pressure Monitor
System............................9-49
Tire Pressure Monitor
Operation........................9-51
Tire Inspection and
Rotation..........................9-54
When It Is Time for
New Tires.......................9-56
Buying New Tires.............9-56
Different Size Tires and
Wheels............................9-58
Vehicle Service and Care 9-1
2008 - Pontiac G8 Owner Manual

Notice:
Using the wrong uid can
badly damage brake hydraulic
system parts. For example,
just a few drops of
mineral-based oil, such as
engine oil, in the brake
hydraulic system can damage
brake hydraulic system
parts so badly that they will
have to be replaced. Do not let
someone put in the wrong
kind of uid.
If you spill brake uid on your
vehicle’s painted surfaces, the
paint nish can be damaged.
Be careful not to spill brake
uid on your vehicle. If you do,
wash it off immediately. See
Exterior Cleaning on page 9-94.
Brake Wear
Your vehicle has disc brakes. Disc
brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake pads
are worn and new pads are needed.
The sound can come and go or be
heard all the time your vehicle is
moving, except when you are
pushing on the brake pedal rmly.
{CAUTION
The brake wear warning sound
means that soon the brakes will
not work well. That could lead
to an accident. When you hear
the brake wear warning sound,
have your vehicle serviced.
Notice:Continuing to drive with
worn-out brake pads could
result in costly brake repair.Some driving conditions or climates
can cause a brake squeal when
the brakes are rst applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent
brake pulsation. When tires are
rotated, inspect brake pads for wear
and evenly tighten wheel nuts in
the proper sequence to torque
specications inCapacities and
Specifications on page 10-2.
Brake linings should always be
replaced as complete axle sets.
Brake Pedal Travel
See your dealer/retailer if the brake
pedal does not return to normal
height, or if there is a rapid increase
in pedal travel. This could be a sign
that brake service might be required.
Brake Adjustment
Every time you apply the brakes,
with or without the vehicle moving,
the brakes adjust for wear.
Vehicle Service and Care 9-25
2008 - Pontiac G8 Owner Manual

Headlamp Aiming
The optical headlamp aiming system
has been preset at the factory
and should need no further
adjustment.
However, if the vehicle is damaged
adjustment may be necessary.
If oncoming vehicles ash their high
beams at you, this may also mean
the vertical aim needs to be adjusted.
It is recommended that the vehicle
is taken to your dealer/retailer
for service if the headlamps need to
be re-aimed. It is possible however,
to re-aim the headlamps as
described.
The vehicle should:
Be placed so the headlamps
are 25 ft. (7.6 m) from a light
colored wall.
Have all four tires on a perfectly
level surface which is level all
the way to the wall.
Be placed so it is at a right angle
to the wall.
Not have any snow, ice, or
mud on it.
Be fully assembled and all other
work stopped while headlamp
aiming is being done.
Have a full tank of fuel and one
person or 160 lbs (75 kg) on
the driver seat.
Have all tires properly inated.
Headlamp aiming is done with
the vehicle’s low-beam headlamps.
The high-beam headlamps will
be correctly aimed if the low-beam
headlamps are aimed properly.To adjust the vertical aim on the
headlamps:
1. Open the hood.Hood Release
on page 9-5.
2. Locate the aim dot on the lens of
the low-beam headlamp.
3. Record the distance from the
ground to the aim dot on the
low-beam headlamp.
Vehicle Service and Care 9-27
2008 - Pontiac G8 Owner Manual

Tires
Your new vehicle comes with
high-quality tires made by
a leading tire manufacturer.
If you ever have questions
about your tire warranty and
where to obtain service,
see your vehicle Warranty
booklet for details.
{CAUTION
Poorly maintained and
improperly used tires are
dangerous.
Overloading your vehicle’s
tires can cause
overheating as a result of
too much exing. You
could have an air-out and
a serious accident. See
Loading the Vehicle on
page 8-28.
Underinated tires pose
the same danger as
overloaded tires. The
resulting accident could
cause serious injury.
Check all tires frequently
to maintain the
recommended pressure.
(Continued)
CAUTION (Continued)
Tire pressure should be
checked when your
vehicle’s tires are cold.
SeeInflation - Tire
Pressure on page 9-46.
Overinated tires are more
likely to be cut, punctured,
or broken by a sudden
impact — such as when
you hit a pothole. Keep
tires at the recommended
pressure.
Worn, old tires can cause
accidents. If the tire’s
tread is badly worn, or
if your vehicle’s tires
have been damaged,
replace them.
Vehicle Service and Care 9-39
2008 - Pontiac G8 Owner Manual

Tire Sidewall Labeling
Useful information about a tire is
molded into its sidewall. The
examples 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 dene 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.
(B) TPC Spec (Tire
Performance Criteria
Specication)
:Original
equipment tires designed to
GM’s specic tire performance
criteria have a TPC specication
code molded onto the sidewall.
GM’s TPC specications
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 Identication 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.
Passenger (P-Metric) Tire
Example
9-40 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual