2008 PONTIAC G8 check oil

Oil Pressure Gage
The gage shows the engine oil
pressure.
It is located in the center of the
instrument panel.
{CAUTION
Do not keep driving if the oil
pressure is low. If you do, your
engine can become so hot that
it catches re. You or others
could be burned. Check your
oil as soon as possible and
have your vehicle serviced.
Notice:Lack of proper engine oil
maintenance may damage the
engine. The repairs would not be
covered by the vehicle warranty.
Always follow the maintenance
schedule in this manual for
changing engine oil.
Fuel Gage
The fuel gage shows about how
much fuel you have left, when the
ignition is on.
When the indicator nears empty, the
low fuel warning light will come
on and along with a chime. There is
still a little fuel left, but you should
refuel soon.Here are four things that some
owners ask about. These are normal
and do not indicate a problem
with your fuel gage:
At the service station, the gas
pump shuts off before the
gage reads full.
It takes a little more or less fuel
to ll up than the gage indicated.
The indicator moves a little when
you turn a corner or speed up.
The gage will continue to show
the remaining fuel when the
ignition is turned off.
4-22 Instruments and Controls
2008 - Pontiac G8 Owner Manual

{Alarm Activated
This message is displayed when the
content theft-deterrent system
was activated by an attempted
break-in. The messages may also
include the location on the
vehicle where the break-in was
attempted. SeeContent
Theft-Deterrent on page 2-13for
more information.
"Alternator
This message is displayed if there is
a problem with the battery charging
system. The charging system
light may also come on in the
instrument panel cluster. See
Charging System Light on
page 4-15. Driving while this
message is on could drain the
battery. Turn off all unnecessary
accessories. Have the electrical
system checked as soon as
possible. See your dealer/retailer.
Battery Saver Mode On
This message is displayed when the
battery voltage level is low.
$Brake
This message is displayed if there is
a problem with the brake system.
The Brake System Warning
light may also come on in the
instrument panel cluster. SeeBrake
System Warning Light on
page 4-16. When this message is
on, stop the vehicle on the side
of the road. Do not continue driving
until you know that braking is
possible or that the cause of the
problem has been corrected,
see your dealer/retailer. This
message also indicates low brake
uid. Check the brake uid level.
SeeBrakes on page 9-24.
*Check Engine
If this message and the Malfunction
Indicator Lamp come on and
stay on when driving, the system
may require servicing. Although the
vehicle may still be drivable and
not require towing, take the vehicle
to your dealer/retailer as soon
as possible. If this message comes
on when the Malfunction Indicator
Lamp is ashing, reduce the
vehicle’s speed and load until the
lamp stops ashing, then take
the vehicle to your dealer/retailer as
soon as possible. SeeMalfunction
Indicator Lamp on page 4-18
for more information.
:Check Oil
This message is displayed if the oil
pressure or oil level is low. Stop
when safe, turn off the engine and
check the engine oil level. See
Engine Oil on page 9-8. Do not run
the engine when this warning is
4-28 Instruments and Controls
2008 - Pontiac G8 Owner Manual

illuminated. If the oil level is normal,
have the system checked at your
dealer/retailer.
You can press
3or8to
acknowledge that you received the
message, but
:Check Oil will
continue to appear in the bottom of
the DIC display until the vehicle
has been serviced.
X Contact Dealer
This message is displayed when
there is a fault in the instrument
panel, see your dealer/retailer.
You can press
3or8to
acknowledge that you received
the message, butXService will
continue to appear in the bottom of
the DIC display until the vehicle
has been serviced.
ICruise On, Cruise Off,
Cruise Active, and Cruise
Inactive
These messages display the status
of the cruise control system. See
Cruise Control on page 4-5for more
information.
Engine Immobilized Refer to
Owners Manual
This message is displayed when the
engine has been shutdown due to
the theft-deterrent system. See
Immobilizer Operation on page 2-12
for more information.
You can press
3or8to
acknowledge that you received the
message, but
AEng Immo will
continue to appear in the bottom of
the DIC display until the vehicle
has been serviced.
BEngine Temp
(Temperature) Hot
This message is displayed when the
engine coolant temperature is
excessively hot. Stop the vehicle as
soon as it is safe to do so. See
Engine Overheating on page 9-16.
You can press
3or8to
acknowledge that you received the
message, but
BTemp Hot will
continue to appear in the bottom of
the DIC display until the vehicle
has been serviced.
.Low Fuel
This message is displayed when the
fuel level is low.
You can press
3or8to
acknowledge that you received the
message, but
.Low Fuel will
continue to appear in the bottom
of the DIC display until the fuel
tank has been lled above the low
fuel level.
Instruments and Controls 4-29
2008 - Pontiac G8 Owner Manual

When the engine starts, let go of
the key and accelerator. If the
vehicle starts briey but then
stops again, do the same thing.
This clears the extra gasoline
from the engine. Do not race
the engine immediately
after starting it. Operate the
engine and transmission gently
until the oil warms up and
lubricates all moving parts.
Notice:The engine is designed
to work with the electronics
in the vehicle. If you add electrical
parts or accessories, you could
change the way the engine
operates. Before adding electrical
equipment, check with your
dealer/retailer. If you do not,
the engine might not perform
properly. Any resulting damage
would not be covered by the
vehicle warranty.Engine Coolant Heater
The engine coolant heater, if
available, can help in cold weather
conditions at or below 0°F (−18°C)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting your
vehicle. An internal thermostat in the
plug-end of the cord will prevent
engine coolant heater operation at
temperatures above 0°F (−18°C).
To Use The Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap the
electrical cord.
The electrical cord is located on
the driver side of the engine
compartment, behind the
air cleaner for V8 models.
The electrical cord is located on
the passenger side of the
engine compartment, behind the
engine compartment fuse
block for V6 models.3. Plug it into a normal, grounded
110-volt AC outlet.
{CAUTION
Plugging the cord into an
ungrounded outlet could cause
an electrical shock. Also, the
wrong kind of extension cord
could overheat and cause a
re. You could be seriously
injured. Plug the cord into a
properly grounded three-prong
110-volt AC outlet. If the cord
will not reach, use a heavy-duty
three-prong extension cord
rated for at least 15 amps.
4. Before starting the engine, be
sure to unplug and store the
cord as it was before to keep it
away from moving engine
parts. If you do not it could be
damaged.
Driving and Operating 8-5
2008 - Pontiac G8 Owner Manual

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

Additives
To provide cleaner air, all gasolines
in the United States are now required
to contain additives that help prevent
engine and fuel system deposits
from forming, allowing the emission
control system to work properly.
In most cases, you should not have
to add anything to the fuel. However,
some gasolines contain only the
minimum amount of additive required
to meet U.S. Environmental
Protection Agency regulations.
To help keep fuel injectors and intake
valves clean, or if your vehicle
experiences problems due to dirty
injectors or valves, look for gasoline
that is advertised as TOP TIER
Detergent Gasoline. Also, your
dealer/retailer has additives that will
help correct and prevent most
deposit-related problems.
Gasolines containing oxygenates,
such as ethers and ethanol, and
reformulated gasolines might
be available in your area.We recommend that you use these
gasolines, if they comply with the
specications described earlier.
However, E85 (85% ethanol) and
other fuels containing more than
10% ethanol must not be used in
vehicles that were not designed
for those fuels.
Notice:Your vehicle was not
designed for fuel that contains
methanol. Do not use fuel
containing methanol. It can
corrode metal parts in the fuel
system and also damage plastic
and rubber parts. That damage
would not be covered under your
warranty.
Some gasolines that are not
reformulated for low emissions can
contain an octane-enhancing additive
called methylcyclopentadienyl
manganese tricarbonyl (MMT); ask
the attendant where you buy gasoline
whether the fuel contains MMT.We recommend against the use of
such gasolines. Fuels containing
MMT can reduce the life of spark
plugs and the performance of the
emission control system could be
affected. The malfunction indicator
lamp might turn on. If this occurs,
return to your dealer/retailer for
service.
Fuels in Foreign
Countries
If you plan on driving in another
country outside the United States or
Canada, the proper fuel might be
hard to nd. Never use leaded
gasoline or any other fuel not
recommended in the previous text
on fuel. Costly repairs caused
by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an
auto club, or contact a major oil
company that does business in the
country where you will be driving.
8-34 Driving and Operating
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

Owner Checks
{CAUTION
An electric fan under the hood
can start up and injure you
even when the engine is not
running. Keep hands, clothing,
and tools away from any
underhood electric fan.
{CAUTION
Things that burn can get on hot
engine parts and start a re.
These include liquids like fuel,
oil, coolant, brake uid,
windshield washer and other
uids, and plastic or rubber.
You or others could be burned.
Be careful not to drop or spill
things that will burn onto a hot
engine.
Hood Release
To open the hood:
1. Pull the release handle with the
above symbol on it. It is located
below the instrument panel to
the left of the steering wheel.2. Pull up on the secondary hood
release. The lever is located
near the middle of the hood.
3. Lift the hood.
4. Release the hood prop rod from
its retainer and put it into the
slot in the hood. To insert
the hood prop rod into the slot.
Before closing the hood, be sure all
the ller caps are on properly.
Make sure to return the hood prop
rod carefully back to its retainer
to avoid damaging the vehicle.
Vehicle Service and Care 9-5
2008 - Pontiac G8 Owner Manual