PONTIAC G8 2008 Owners 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

4. At the wall, measure from the
ground upward (A) to the
recorded distance from Step 3
and mark it.
5. Draw or tape a horizontal line (B)
on the wall the width of the
vehicle at the height of the mark
in Step 4.
Notice:Do not cover a headlamp
to improve beam cut-off when
aiming. Covering a headlamp may
cause excessive heat build-up
which may cause damage to the
headlamp.6. Turn on the low-beam headlamps
and place a piece of cardboard
or equivalent in front of the
headlamp not being adjusted.
Do not place it directly on
the headlamp. This allows only
the beam of light from the
headlamp being adjusted to be
seen on the at surface.
7. Locate the vertical headlamp
aiming screws, which are
under the hood near each
headlamp assembly.The adjustment screw can be
turned with a 6 mm socket
wrench.
8. Turn the vertical aiming screw
clockwise or counterclockwise
until the headlamp beam is
aimed to the horizontal tape line.
9. Make sure that the light from the
headlamp is positioned at the
bottom edge of the horizontal
tape line. The lamp on the left (A)
shows the correct headlamp aim.
The lamp on the right (B) shows
the incorrect headlamp aim.
10. Repeat Steps 7 through 9 for
the opposite headlamp.
Driver Side (Passenger
Side Similar)
9-28 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

Bulb Replacement
For the proper type of replacement
bulbs, seeReplacement Bulbs
on page 9-32.
For any bulb changing procedure
not listed in this section, contact
your dealer/retailer.
Halogen Bulbs
{CAUTION
Halogen bulbs have
pressurized gas inside and can
burst if you drop or scratch the
bulb. You or others could be
injured. Be sure to read and
follow the instructions on the
bulb package.
Headlamps and Parking
Lamps
To replace one of these bulbs:
If the front turn signal lamp
or parking lamp needs to be
changed, see your dealer/retailer.
A. Front Turn Signal Lamp/
Parking Lamp
B. Low Beam Headlamp
C. High Beam Headlamp1. Open the hood. SeeHood
Release on page 9-5.
2. Remove the radiator support by
turning the head screws
counterclockwise and then
pulling them straight out.
3. For the passenger side pull up
on the coolant bottle ller neck
to remove it and place it to
one side.
Let the ller neck drain before
pulling it all the way out. Place a
clean towel over the opening
of the coolant bottle after
removing it.
Vehicle Service and Care 9-29
2008 - Pontiac G8 Owner Manual

4. For the driver side remove the
clip from the air cleaner/lter
cover. Move the cover to
the back, out of the way.5. Turn the dust cap
counterclockwise to remove.
6. Press the two prongs together on
the connector to remove the
wiring harness connector.7. Turn the bulb socket
counterclockwise and pull it
out to remove from the lamp
assembly.
8. Pull the old bulb straight out of
the bulb socket.
9. Push the new bulb straight into
the bulb socket until it clicks.
10. Reconnect the wiring harness
to the bulb socket.
11. Push the bulb socket into the
lamp assembly and turn it
clockwise to lock it into place.
9-30 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

12. Turn the dust cap clockwise to
lock it into place.
13. For the driver side reinstall the
air cleaner/lter cover.
14. For the passenger side reinstall
the coolant bottle ller neck.
15. Reinstall the radiator support
screws.
Taillamps
A. Turn Signal Lamp
B. Stoplamp/Taillamp
C. Back-up LampTo replace one of these bulbs:
For any lamp not listed here, see
your dealer/retailer to replace.
1. Open the trunk. SeeTrunk on
page 2-10.
2. Raise the spare tire cover. See
Removing the Spare Tire and
Tools on page 9-72for more
information.
3. Turn the four convenience net
hooks securing the plastic
trunk trim counterclockwise.
4. Pull the trunk trim straight up to
remove.5. Turn the trunk lining securing
pins counterclockwise and
pull down at the same time to
remove.
6. Lower the spare tire cover.
7. Turn the bulb socket
counterclockwise to remove it
from the rear lamp housing.
8. Lightly press the bulb and turn it
counterclockwise to remove it
from the bulb holder.
Vehicle Service and Care 9-31
2008 - Pontiac G8 Owner Manual

9. Push the new bulb into the
socket and turn it clockwise
to lock it into place.
10. Push the bulb socket straight in
and turn it clockwise to lock it
into place.
11. Make sure the seals are applied
to the taillamp assembly and
screws.12. Raise the spare tire cover.
13. Turn the trunk lining securing
pins clockwise to lock into
place.
14. Return the plastic trunk trim to
its original location.
15. Reinstall the plastic
retaining pins.
Replacement Bulbs
Exterior LampBulb
Number
High-Beam
HeadlampH9
Low-Beam
HeadlampH11
Stoplamp/Taillamp P21/5W
Rear Turn
Signal LampPY21W
Back-up Lamp P21W
For replacement bulbs not listed
here, contact your dealer/retailer.
Electrical System
Add-On Electrical
Equipment
Notice:Do not add anything
electrical to your vehicle unless
you check with your
dealer/retailer rst. Some
electrical equipment can damage
your vehicle and the damage
would not be covered by your
warranty. Some add-on electrical
equipment can keep other
components from working as
they should.
Add-on equipment can drain your
vehicle’s battery, even if your vehicle
is not operating.
Your vehicle has an airbag system.
Before attempting to add anything
electrical to your vehicle, see
Servicing Your Airbag-Equipped
Vehicle on page 1-30.
9-32 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

Headlamp Wiring
The headlamp wiring is protected by
fuses in the fuse block. An
electrical overload will cause the
lamps to turn off. If this happens,
have your headlamp wiring checked
right away.
Windshield Wiper Fuses
The windshield wiper motor is
protected by a circuit breaker and a
fuse. If the motor overheats due
to heavy snow, etc., the wiper
will stop until the motor cools. If the
overload is caused by some
electrical problem, have it xed.
Power Windows and
Other Power Options
Circuit breakers in the fuse block
protect the power windows and
other power accessories. When the
current load is too heavy, the
circuit breaker opens and closes,
protecting the circuit until the
problem is xed or goes away.
Instrument Panel Fuse
Block
The instrument panel fuse block is
located on the end of the
instrument panel, on the driver’s
side of the vehicle. To access
the fuses, open the fuse panel door
by pulling out.
To reinstall the door, push the door
back into its original location.
Vehicle Service and Care 9-33
2008 - Pontiac G8 Owner Manual

Fuses UsageF1 Airbag
F2 Trunk Release
F3 Door Locks
F4 Inadvertent
Power LED
F5 Courtesy/Turn
Signal Lamps/Front
Passenger Turn
Signal
F6 Rear and Side
Passenger Side
Turn Signal
F7 Spare
F8 Driver Side Turn
Signal
F9 Body Control
Module
F10 Stoplamps
F11 Interior Lamps
F12 Discrete Logic
Ignition Sensor/Theft
Deterrent System
F13 Rear Cigarette
Lighter
F14 Auxiliary Power
Instrument Panel Fuse Block - Fuse Puller Shown
9-34 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

Fuses Usage
F15Outside Rearview
Mirrors
F16Sunroof/Automatic
Transmission
Shift Lock
F17 Sunroof
F18Automatic Occupant
Sensor
F19Driver Side
Heated Seat
F20Passenger Side
Heated Seat
F21Daytime Running
Lamps
F22Front Cigarette
Lighter
F23Steering Wheel
Controls
Backlighting
F24 Power Window
FUSE
PULLERFuse PullerCircuit
BreakersUsage
B1 Spare
B2 Power Windows
B3 Power Seats
B4 Spare
Relays Usage
R1Retain Accessory
Power 1
R2 Door Locks
R3Passenger Side
Door Lock
R4 Spare
R5 Trunk Release
R6 Driver Side Lock
R7Retain Accessory
Power 2
R8 Accessory
R9 Blower
R10 Spare
R11Daytime Running
Lamps
R12 Fuel Pump
Engine Compartment
Fuse Block
To open the fuse block cover,
remove the clip on cover.
Notice:Spilling liquid on any
electrical components on
your vehicle may damage it.
Always keep the covers on any
electrical component.
Vehicle Service and Care 9-35
2008 - Pontiac G8 Owner Manual

Fuses UsageFL1 Spare
FL2 Rear Defog
FL3 ABS Motor
FL4 Battery Main 3
FL5 Battery Main 1
FL6 Spare
FL7 Battery Main 2
FL8 Starter
FL9 HVAC Blower Motor
FL10 Fan 1 Engine
Cooling (Right)
FL11 Spare
FL12 Fan 2 Engine
Cooling (Left)
F1 Comm Enable
F2 HVAC Battery
F3 Back-up Lamp
F4 Fog Lamps (Front)
F5 ABS Valves
F6 Spare
F8 Horn
F9 Transmission
Control Module
Engine Compartment Fuse Block - Fuse Puller Shown
9-36 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual