engine PONTIAC G8 2009 Workshop Manual

Gasoline Octane
If the vehicle has a V8 engine, use
regular unleaded gasoline with a
posted octane rating of 87 or higher.
If the octane rating is less than 87,
you might notice an audible knocking
noise when you drive, commonly
referred to as spark knock. If this
occurs, use a gasoline rated at 87
octane or higher as soon as possible.
If you are using gasoline rated at 87
octane or higher and you hear heavy
knocking, the engine needs service.
If the vehicle has the 3.6L V6 engine
(VIN Code 7), use regular unleaded
gasoline with a posted octane rating
of 87 or higher. For best performance
or trailer towing, you could choose
to use middle grade 89 octane
unleaded gasoline. If the octane
rating is less than 87, you might
notice an audible knocking noise
when you drive, commonly referredto as spark knock. If this occurs,
use a gasoline rated at 87 octane
or higher as soon as possible. If you
are using gasoline rated at
87 octane or higher and you hear
heavy knocking, the engine needs
service.
Gasoline Specications
At a minimum, gasoline should
meet ASTM specication D 4814
in the United States or
CAN/CGSB-3.5 or 3.511 in Canada.
Some gasolines contain an
octane-enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). We recommend
against the use of gasolines
containing MMT. SeeAdditives on
page 8-36for additional information.
California Fuel
If the vehicle is certied to meet
California Emissions Standards, it is
designed to operate on fuels that
meet California specications. See
the underhood emission control
label. If this fuel is not available in
states adopting California emissions
standards, the vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control
system performance might be
affected. The malfunction indicator
lamp could turn on and the vehicle
might fail a smog-check test. See
Malfunction Indicator Lamp on
page 4-18. If this occurs, return to
your authorized dealer/retailer for
diagnosis. If it is determined that the
condition is caused by the type of
fuel used, repairs might not be
covered by the vehicle warranty.
Driving and Operating 8-35

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 the 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:This 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
the vehicle 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 the vehicle 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.
8-36 Driving and Operating

Filling the Tank
{CAUTION
Fuel vapor burns violently and a
fuel re can cause bad injuries.
To help avoid injuries to you and
others, read and follow all the
instructions on the pump island.
Turn off the engine when you are
refueling. Do not smoke if you are
near fuel or refueling the vehicle.
Do not use cellular phones. Keep
sparks, ames, and smoking
materials away from fuel. Do not
leave the fuel pump unattended
when refueling the vehicle. This is
against the law in some places.
Do not re-enter the vehicle while
pumping fuel. Keep children away
from the fuel pump; never let
children pump fuel.The fuel cap is located behind a
hinged fuel door on the passenger
side of the vehicle.
To open the fuel door, the vehicle
must be unlocked. Push on the rear
edge of the door to open.
When reinstalling the cap, turn it
clockwise until it clicks, otherwise
the Malfunction Indicator Lamp may
turn on. SeeMalfunction Indicator
Lamp on page 4-18.
{CAUTION
Fuel can spray out on you if you
open the fuel cap too quickly. If
you spill fuel and then something
ignites it, you could be badly
burned. This spray can happen if
the tank is nearly full, and is more
likely in hot weather. Open the
fuel cap slowly and wait for any
hiss noise to stop. Then unscrew
the cap all the way.
Be careful not to spill fuel. Do not
top off or overll the tank and wait a
few seconds after you have nished
pumping before removing the nozzle.
Clean fuel from painted surfaces as
soon as possible. SeeExterior
Cleaning on page 9-98.
When replacing the fuel cap, turn it
clockwise until it clicks. Make
sure the cap is fully installed.
Driving and Operating 8-37

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

Uniform Tire Quality
Grading...........................9-62
Wheel Alignment and
Tire Balance....................9-64
Wheel Replacement..........9-64
Tire Chains.......................9-65
Tire Changing
If a Tire Goes Flat............9-66
Tire Sealant and
Compressor Kit
(V8 Engine)
.....................9-67
Changing a Flat Tire.........9-75
Removing the Spare
Tire and Tools.................9-76
Removing the Flat Tire
and Installing the
Spare Tire
.......................9-77
Storing a Flat or Spare
Tire and Tools.................9-82
Compact Spare Tire..........9-83
Jump Starting
Jump Starting...................9-84
Towing
Towing Your Vehicle.........9-88
Shift Lock Manual
Release...........................9-88
Recreational Vehicle
Towing............................9-89
Towing a Trailer................9-89
Appearance Care
Interior Cleaning................9-95
Exterior Cleaning..............9-98
Sheet Metal Damage.......9-102
Finish Damage................9-102
Underbody Maintenance. . .9-102
Chemical Paint
Spotting.........................9-102
Service
For service and parts needs, visit
your dealer/retailer. You will receive
genuine GM parts and GM-trained
and supported service people.
Genuine GM parts have one
of these marks:
9-2 Vehicle Service and Care

Accessories and
Modications
When non-dealer/non-retailer
accessories are added to the vehicle,
they can affect vehicle performance
and safety, including such things as
airbags, braking, stability, ride and
handling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. Some of these accessories
could even cause malfunction or
damage not covered by the vehicle
warranty.
GM Accessories are designed to
complement and function with
other systems on the vehicle.
Your GM dealer/retailer can
accessorize the vehicle using
genuine GM Accessories.When you go to your GM dealer/
retailer and ask for GM Accessories,
you will know that GM-trained and
supported service technicians will
perform the work using genuine
GM Accessories.
Also, seeAdding Equipment to
Your Airbag-Equipped Vehicle
on page 1-32.
California Proposition 65
Warning
Most motor vehicles, including this
one, contain and/or emit chemicals
known to the State of California
to cause cancer and birth defects or
other reproductive harm. Engine
exhaust, many parts and systems
(including some inside the vehicle),
many uids, and some component
wear by-products contain and/or
emit these chemicals.
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag
initiators, seat belt pretensioners,
and lithium batteries contained
in remote keyless transmitters,
may contain perchlorate materials.
Special handling may be
necessary. For additional
information, see www.dtsc.ca.gov/
hazardouswaste/perchlorate.
Vehicle Service and Care 9-3

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

Engine Compartment Overview
When you open the hood, this is what you will see:A.
Engine Compartment Fuse Block
on page 9-38 .
B. Coolant Reservoir and Dipstick. See Cooling System on
page 9-13 .
C. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine
Oil on page 9-8 .
D. Engine Oil Dipstick (Out of View). See “Checking Engine Oil” under
Engine Oil on page 9-8 .
E. Brake Master Cylinder Reservoir. See “Brake Fluid” under Brakes
on page 9-25 .
F. Power Steering Reservoir. See Power Steering Fluid
on page 9-21 .
G. Engine Air Cleaner/Filter on
page 9-11 .
H. Windshield Washer Fluid Reservoir. See Windshield
Washer Fluid on page 9-23 .
I. Radiator Pressure Cap. See Cooling System on page 9-13 .
V6 Engine
9-6 Vehicle Service and Care

A.Engine Compartment Fuse Block
on page 9-38 .
B. Coolant Reservoir and Dipstick. See Cooling System on
page 9-13 .
C. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil on page 9-8 .
D. Engine Oil Fill Cap. See “When to Add Oil” under Engine Oil on
page 9-8 .
E. Power Steering Reservoir. See Power Steering Fluid
on page 9-21 .
F. Brake Master Cylinder Reservoir. See “Brake Fluid” under Brakes
on page 9-25 .
G. Engine Air Cleaner/Filter on
page 9-11 .
H. Windshield Washer Fluid Reservoir. See Windshield
Washer Fluid on page 9-23 .
I. Radiator Pressure Cap. See Cooling System on page 9-13 .
V8 Engine
Vehicle Service and Care 9-7

Engine Oil
Checking Engine Oil
It is a good idea to check the
engine oil every time you get fuel.
In order to get an accurate reading,
the oil must be warm and the
vehicle must be on level ground.
The engine oil dipstick handle
is a yellow loop. SeeEngine
Compartment Overview on page 9-6
for the location of the engine oil
dipstick.
1. Turn off the engine and give the
oil several minutes to drain back
into the oil pan. If you do not
do this, the oil dipstick might not
show the actual level.
2. Pull the dipstick and clean it with
a paper towel or cloth, then push
it back in all the way. Remove
it again, keeping the tip down and
check the level.
When to Add Engine Oil
If the oil is below the MIN (minimum)
mark, add at least one quart/liter
of the recommended oil. This
section explains what kind of oil to
use. For engine oil crankcase
capacity, seeCapacities and
Specifications on page 10-2.
Notice:Do not add too much oil.
If the engine has so much oil
that the oil level gets above the
upper mark that shows the proper
operating range, the engine
could be damaged.
SeeEngine Compartment Overview
on page 9-6for the location of
the engine oil ll cap.
Add enough oil to put the level
somewhere in the proper operating
range. Push the dipstick all the
way back in when you are through.
What Kind of Engine Oil to Use
Look for three things:
9-8 Vehicle Service and Care