Rear diff PONTIAC G8 2009 Owners Manual

When Should an Airbag
Inate?
Frontal airbags are designed to
inate in moderate to severe frontal
or near-frontal crashes to help
reduce the potential for severe
injuries mainly to the driver’s or right
front passenger’s head and chest.
However, they are only designed to
inate if the impact exceeds a
predetermined deployment
threshold. Deployment thresholds
are used to predict how severe a
crash is likely to be in time for the
airbags to inate and help restrain
the occupants.Whether the frontal airbags will or
should deploy is not based on
how fast your vehicle is traveling.
It depends largely on what you hit,
the direction of the impact, and how
quickly your vehicle slows down.
Frontal airbags may inate at
different crash speeds. For example:
If the vehicle hits a stationary
object, the airbags could inate at
a different crash speed than if the
vehicle hits a moving object.
If the vehicle hits an object that
deforms, the airbags could inate
at a different crash speed than if
the vehicle hits an object that
does not deform.
If the vehicle hits a narrow object
(like a pole), the airbags could
inate at a different crash speed
than if the vehicle hits a wide
object (like a wall).
If the vehicle goes into an object
at an angle, the airbags could
inate at a different crash speed
than if the vehicle goes straight
into the object.
Thresholds can also vary with
specic vehicle design.
Frontal airbags are not intended to
inate during vehicle rollovers, rear
impacts, or in many side impacts.
Seats and Restraints 1-23

Adding Equipment to
Your Airbag-Equipped
Vehicle
Q:Is there anything I might add to
or change about the vehicle
that could keep the airbags
from working properly?
A:Yes. If you add things that
change the vehicle’s frame,
bumper system, height, front end
or side sheet metal, they may
keep the airbag system from
working properly. Changing or
moving any parts of the front
seats, safety belts, the airbag
sensing and diagnostic module,
steering wheel, instrument panel,
roof-rail airbag modules, the
inside rearview mirror, ceiling
headliner or pillar garnish trim,
front sensors, or airbag wiring
can affect the operation of the
airbag system.In addition, the vehicle has a
passenger sensing system for the
right front passenger position,
which includes sensors that are
part of the passenger’s seat.
The passenger sensing system
may not operate properly if the
original seat trim is replaced
with non-GM covers, upholstery
or trim, or with GM covers,
upholstery or trim designed for
a different vehicle. Any object,
such as an aftermarket seat
heater or a comfort enhancing
pad or device, installed under or
on top of the seat fabric, could
also interfere with the operation of
the passenger sensing system.
This could either prevent proper
deployment of the passenger
airbag(s) or prevent the
passenger sensing system from
properly turning off the passenger
airbag(s). SeePassenger
Sensing System on page 1-27.If you have any questions about
this, you should contact Customer
Assistance before you modify
your vehicle. The phone numbers
and addresses for Customer
Assistance are in Step Two of the
Customer Satisfaction Procedure
in this manual. SeeCustomer
Satisfaction Procedure on
page 12-1.
Q:Because I have a disability,
I have to get my vehicle
modied. How can I nd out
whether this will affect my
airbag system?
A:If you have questions, call
Customer Assistance.
The phone numbers and
addresses for Customer
Assistance are in Step Two
of the Customer Satisfaction
Procedure in this manual.
SeeCustomer Satisfaction
Procedure on page 12-1.
1-32 Seats and Restraints

Q:What are the different types of
add-on child restraints?
A:Add-on child restraints, which are
purchased by the vehicle’s
owner, are available in four basic
types. Selection of a particular
restraint should take into
consideration not only the child’s
weight, height, and age but also
whether or not the restraint will be
compatible with the motor vehicle
in which it will be used.
For most basic types of child
restraints, there are many
different models available.
When purchasing a child
restraint, be sure it is designed
to be used in a motor vehicle.
If it is, the restraint will have
a label saying that it meets
federal motor vehicle safety
standards.The restraint manufacturer’s
instructions that come with the
restraint state the weight and
height limitations for a particular
child restraint. In addition, there
are many kinds of restraints
available for children with
special needs.
{CAUTION
To reduce the risk of neck and
head injury during a crash, infants
need complete support. This is
because an infant’s neck is not
fully developed and its head
weighs so much compared with
the rest of its body. In a crash,
an infant in a rear-facing child
restraint settles into the restraint,
so the crash forces can be
distributed across the strongest
part of an infant’s body, the back
and shoulders. Infants should
always be secured in rear-facing
child restraints.
{CAUTION
A young child’s hip bones are still
so small that the vehicle’s regular
safety belt may not remain low
on the hip bones, as it should.
Instead, it may settle up around
the child’s abdomen. In a crash,
the belt would apply force on a
body area that is unprotected by
any bony structure. This alone
could cause serious or fatal
injuries. To reduce the risk of
serious or fatal injuries during a
crash, young children should
always be secured in appropriate
child restraints.
1-38 Seats and Restraints

Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog or
frost from the rear window. It only
works when the ignition is in
ON/RUN.
The rear window defogger will
only work when the ignition is in
ON/RUN.
+(Rear Window Defogger):
Press to turn the rear window
defogger on or off. The
+indicator
appears in the display. The rear
window defogger turns off
automatically if it is left on.
Notice:Do not use anything
sharp on the inside of the rear
window. If you do, you could cut
or damage the warming grid, and
the repairs would not be covered
by the vehicle warranty. Do not
attach a temporary vehicle
license, tape, a decal or anything
similar to the defogger grid.
EXT TEMP
EXT TEMP (Exterior Temperature):
Press EXT TEMP to show the
temperature outside the vehicle or
the normal display.
Pressing any other climate control
button will change the display from
showing the outside temperature to
showing the normal display.
The units for the EXT TEMP can be
displayed in °F or °C. SeeDIC
Vehicle Customization on page 4-31.
Sensors
The climate control system uses
three different sensors to maintain
the desired temperature. The
solar sensor is located on the
instrument panel, near the
windshield. The interior temperature
sensor is located on the instrument
panel near the steering wheel
and the outside temperature sensor
is in front of the radiator.By monitoring the solar radiation,
the air inside the vehicle and
air moving across the outside
sensor, the selected temperature
can be maintained while using
the AUTO mode by adjusting the
temperature, fan speed, and
air delivery system. The system
may also supply cooler air to
the side of the vehicle facing the
sun. The recirculation mode will
also be activated, as necessary.
Do not cover the sensors or
the automatic climate control
system will not work properly.Remote Start Climate Control
Operation
For vehicles with the remote start
feature and it is activated, the climate
control system will automatically set
the temperature to 73°F (23°C).
When the ignition is turned to
ON/RUN the climate control system
heats and cools the inside of the
vehicle using the modes that
were set before the vehicle was
turned off.
7-8 Climate Controls

The length of time the heater should
remain plugged in depends on
several factors. Ask a dealer/retailer
in the area where you will be
parking the vehicle for the best
advice on this.
Automatic Transmission
Operation
The shift lever is located on the
center console between the
front seats.
There are several different positions
for the shift lever. When the
position of the shift lever is changed,a message is shown in the Driver
Information Center (DIC). The
selected gear is magnied in the
DIC, and changes according to the
shift lever’s movement. There
are also messages for Sport Shift
Mode, Normal Shift Mode and Driver
Shift Control.
P (Park):This position locks the
rear wheels. It is the best position
to use when the engine is started
because the vehicle cannot
move easily.
{CAUTION
It is dangerous to get out of the
vehicle if the shift lever is not fully
in P (Park) with the parking brake
rmly set. The vehicle can roll.
Do not leave the vehicle when the
engine is running unless you have
to. If you have left the engine
(Continued)
CAUTION (Continued)
running, the vehicle can move
suddenly. You or others could be
injured. To be sure the vehicle will
not move, even when you are on
fairly level ground, always set the
parking brake and move the shift
lever to P (Park). SeeShifting Into
Park (Automatic Transmission) on
page 8-12. If you are pulling a
trailer, seeTowing a Trailer on
page 9-89.
Make sure the shift lever is fully
in P (Park) before starting the
engine. The vehicle has an
automatic transmission shift lock
control system. Fully apply the brake
pedal rst and then press the shift
lever button before shifting from
P (Park) when the ignition key is in
ON/RUN or ACC/ACCESSORY.
If you cannot shift out of P (Park),
8-6 Driving and Operating

As you brake, the computer keeps
receiving updates on wheel speed
and controls braking pressure
accordingly.
Remember: ABS does not change
the time you need to get your
foot up to the brake pedal or always
decrease stopping distance. If
you get too close to the vehicle in
front of you, you will not have time to
apply the brakes if that vehicle
suddenly slows or stops. Always
leave enough room up ahead
to stop, even though you have ABS.
Using ABS
Do not pump the brakes. Just hold
the brake pedal down rmly and
let antilock work for you. You might
hear the antilock pump or motor
operate, and feel the brake
pedal pulsate, but this is normal.
Braking in Emergencies
With ABS, you can steer and
brake at the same time. In many
emergencies, steering can help
you more than even the very best
braking.
Electronic Stability
Program
The vehicle has the Electronic
Stability Program (ESP®) that assists
with directional control of the vehicle
in difficult driving conditions by
reducing engine power and applying
the brakes to individual wheels. This
is especially useful in slippery road
conditions. The system operates if it
senses that the rear wheels are
spinning too much, are beginning to
lose traction or if it senses that the
vehicle is not moving in its intended
direction. It turns on automatically
every time the vehicle is started.When ESP is working, this light
and the STABILITY CONTROL
ASSISTANCE message will come on
and the ESP CTRL message will be
displayed at the bottom of the DIC.
The STABILITY CONTROL
ASSISTANCE message will remain
on while the system is working
until the
3button is pressed to
display the trip computer. The
ESP CTRL message stays on at the
bottom of the DIC while the
system is working.
Driving and Operating 8-19

In the steering or cornering skid, too
much speed or steering in a curve
causes tires to slip and lose
cornering force. And in the
acceleration skid, too much throttle
causes the driving wheels to spin.
If your vehicle starts to slide, ease
your foot off the accelerator pedal
and quickly steer the way you want
the vehicle to go. If you start steering
quickly enough, your vehicle may
straighten out. Always be ready for a
second skid if it occurs.
Of course, traction is reduced when
water, snow, ice, gravel, or other
material is on the road. For safety,
you want to slow down and
adjust your driving to these
conditions. It is important to slow
down on slippery surfaces because
stopping distance is longer and
vehicle control more limited.
While driving on a surface with
reduced traction, try your best to
avoid sudden steering, acceleration,
or braking, including reducing vehicle
speed by shifting to a lower gear.Any sudden changes could cause
the tires to slide. You might not
realize the surface is slippery until
your vehicle is skidding. Learn to
recognize warning clues — such as
enough water, ice, or packed snow
on the road to make a mirrored
surface — and slow down when you
have any doubt.
Remember: Any Antilock Brake
System (ABS) helps avoid only the
braking skid.
Driving at Night
Night driving is more dangerous
than day driving because some
drivers are likely to be impaired — by
alcohol or drugs, with night vision
problems, or by fatigue.
Night driving tips include:
Drive defensively.
Do not drink and drive.
Reduce headlamp glare by
adjusting the inside rearview
mirror.
Slow down and keep more space
between you and other vehicles
because headlamps can only
light up so much road ahead.
Watch for animals.
When tired, pull off the road.
Do not wear sunglasses.
Avoid staring directly into
approaching headlamps.
Keep the windshield and all glass
on your vehicle clean — inside
and out.
Keep your eyes moving,
especially during turns or curves.
No one can see as well at night as
in the daytime. But, as we get
older, these differences increase.
A 50-year-old driver might need
at least twice as much light to see
the same thing at night as a
20-year-old.
8-24 Driving and Operating

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.
8-26 Driving and Operating

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
Cooling System.................9-13
Engine Coolant.................9-15
Pressure Cap....................9-19
Engine Overheating...........9-20
Power Steering Fluid.........9-21
Windshield Washer Fluid. . . .9-23
Windshield Wiper Blade
Replacement...................9-24
Brakes..............................9-25
Battery..............................9-28
Headlamp Aiming
Headlamp Aiming..............9-28
Bulb Replacement
Bulb Replacement.............9-31
Halogen Bulbs..................9-31
Headlamps and Parking
Lamps.............................9-31
Front Turn Signal Lamps. . .9-33
Taillamps..........................9-34
License Plate Lamp..........9-35
Replacement Bulbs...........9-35
Electrical System
Add-On Electrical
Equipment.......................9-36
Headlamp Wiring..............9-36
Windshield Wiper Fuses. . . .9-36
Power Windows and
Other Power Options.......9-36
Instrument Panel
Fuse Block......................9-36
Engine Compartment
Fuse Block......................9-38
Rear Compartment
Fuse Block......................9-41
Tires
Tires.................................9-42
Tire Sidewall Labeling.......9-42
Tire Terminology and
Denitions.......................9-46
Ination - Tire Pressure. . . .9-49
High-Speed Operation.......9-51
Tire Pressure Monitor
System............................9-52
Tire Pressure Monitor
Operation........................9-54
Tire Inspection and
Rotation..........................9-57
When It Is Time for
New Tires.......................9-59
Buying New Tires.............9-59
Different Size Tires
and Wheels.....................9-61
Vehicle Service and Care 9-1

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 8-30
and Inflation - Tire Pressure on
page 9-49 .
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.
9-52 Vehicle Service and Care