engine PONTIAC G8 2008 Owner's Guide

Starting the Engine
Move the shift lever to P (Park) or
N (Neutral). The engine will not start
in any other position. To restart
when you are already moving, use
N (Neutral) only.
Notice:Do not try to shift to
P (Park) if your vehicle is moving.
If you do, you could damage the
transmission. Shift to P (Park)
only when your vehicle is stopped.
1. With your foot off the accelerator
pedal, turn the ignition key to
START. When the engine starts,
let go of the key. The idle
speed will go down as your
engine gets warm. Do not race
the engine immediately after
starting it. Operate the engine
and transmission gently to allow
the oil to warm up and lubricate
all moving parts.The vehicle has a
Computer-Controlled Cranking
System. This feature assists
in starting the engine and
protects components. If the
ignition key is turned to
the START position, and then
released when the engine
begins cranking, the engine will
continue cranking for a few
seconds or until the vehicle
starts. If the engine does not start
and the key is held in START
for many seconds, cranking
will be stopped after 15 seconds
to prevent cranking motor
damage. To prevent gear
damage, this system also
prevents cranking if the engine
is already running. Engine
cranking can be stopped by
turning the ignition switch
to ACC/ACCESSORY or
LOCK/OFF.Notice:Cranking the engine for
long periods of time, by returning
the key to the START position
immediately after cranking has
ended, can overheat and damage
the cranking motor, and drain the
battery. Wait at least 15 seconds
between each try, to let the
cranking motor cool down.
2. If the engine does not start
after 5-10 seconds, especially in
very cold weather (below 0°F
or−18°C), it could be ooded
with too much gasoline.
Try pushing the accelerator
pedal all the way to the oor
and holding it there as you hold
the key in START for up to a
maximum of 15 seconds.
Wait at least 15 seconds
between each try, to allow the
cranking motor to cool down.
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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.
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2008 - Pontiac G8 Owner Manual

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
(Continued)
CAUTION (Continued)
engine 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 8-10. If you are pulling
a trailer, seeTowing a Trailer
on page 9-85.
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),
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ease pressure on the shift lever and
push the shift lever all the way
into P (Park) while maintaining brake
application. Then press the shift
lever button and move the shift lever
into another gear. SeeShifting
Out of Park on page 8-11.
Notice:Shifting to R (Reverse)
while the vehicle is moving
forward could damage the
transmission. The repairs would
not be covered by the vehicle
warranty. Shift to R (Reverse)
only after the vehicle is stopped.
R (Reverse):Use this gear to
back up.
At low vehicle speeds, R (Reverse)
can also be used to rock the
vehicle back and forth to get out
of snow, ice, or sand without
damaging the transmission.
SeeIf Your Vehicle is Stuck in
Sand, Mud, Ice, or Snow on
page 8-27for additional information.N (Neutral):In this position, the
engine does not connect with
the wheels. To restart when the
vehicle is already moving, use
N (Neutral) only.
{CAUTION
Shifting into a drive gear while
the engine is running at high
speed is dangerous. Unless
your foot is rmly on the brake
pedal, the vehicle could move
very rapidly. You could lose
control and hit people or
objects. Do not shift into a
drive gear while the engine is
running at high speed.
Notice:Shifting out of P (Park)
or N (Neutral) with the engine
running at high speed may
damage the transmission. The
repairs would not be covered by
the vehicle warranty. Be sure
the engine is not running at high
speed when shifting the vehicle.D (Drive):This position is for
normal driving. It provides the best
fuel economy from the vehicle.
If more power is needed for passing,
and the vehicle is:
Going less than 35 mph
(55 km/h), push the accelerator
pedal about halfway down.
Going about 35 mph (55 km/h) or
more, push the accelerator all
the way down.
The transmission will shift down
to a lower gear and have
more power.
Downshifting the transmission in
slippery road conditions could result
in skidding, see Skidding under
Loss of Control on page 8-21.
Notice:Spinning the tires or
holding the vehicle in one place
on a hill using only the
accelerator pedal may damage
the transmission. If you are stuck,
do not spin the tires. When
stopping on a hill, use the brakes
to hold the vehicle in place.
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Sport Shift Mode
The automatic transmission has a
Sport Shift Mode. When you
are in the Sport Shift Mode the
vehicle will still shift automatically.
The transmission may remain
in a gear longer than it would in the
normal driving mode based on
braking, throttle input, and vehicle
lateral acceleration. To use this
feature, move the shift lever
over from D (Drive) to the right
quadrant. The Sport Shift message
in the DIC displays. If the shift
lever is not moved forward or
rearward, the vehicle remains in
sport mode.
Performance Mode Lift Foot Mode
Within Sport Shift Mode there is
a further performance feature called
Performance Mode Lift Foot (PMLF)
Mode. The feature is activated
automatically when sports oriented
driving is detected, based on
cornering and on/off throttleapplication. PMLF allows the
transmission to hold the current
gear instead of upshifting when the
throttle is lifted.
Driver Shift Control (DSC)
Notice:If you drive your vehicle
at high RPMs without upshifting
while using DSC, you could
damage the vehicle. Always
upshift when necessary while
using DSC.
The automatic transmission has
DSC that allows gear changes
similar to a manual transmission.
To use this feature:
1. Move the shift lever over from
D (Drive) to the right quadrant.
The Sport Shift message in
the DIC displays.
2. To enter DSC, press the shift
lever forward to upshift or
rearward to downshift. The Active
Select On message in the DIC
will come on.The DIC will indicate the requested
gear range when moving the
shift lever forward or rearward.
While using DSC, the vehicle has
rmer shifting and increased
performance. This can be used for
sport driving or when climbing
or descending hills, to stay in gear
longer, or to down shift for more
power or engine braking.
The transmission will only allow the
driver to shift into gears appropriate
for the vehicle speed and engine
Revolutions Per Minute (RPM).
The transmission will not
automatically shift to the next lower
gear if the engine RPM is too high.
If shifting is prevented for any
reason, the currently selected gear
will ash multiple times, indicating
that the transmission has not
shifted gears.
While in DSC, the transmission
automatically downshifts when the
vehicle comes to a stop.
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When accelerating the vehicle from
a stop in snowy and icy conditions,
1st, 2nd or 3rd gear starts can
be selected from a standing start.
This is useful for gentle acceleration
on slippery surfaces.
To return to Normal Shift mode,
slide the shift lever over from
the right quadrant to the left into
D (Drive). A Normal Shift message
will be displayed in the DIC.
Normal Shift Mode is recommended
for normal or freeway driving, as
it provides optimum fuel economy.
Powertrain Braking
For vehicles with a 6 speed
automatic transmission, there is
an additional feature known
as Powertrain Braking. When driving
on steep descents where frequent
braking is required, the vehicle
will automatically downshift to
provide engine braking assistance.
This feature also reduces brake
temperatures and wear.Downshifting will only occur when
the driver’s foot is applied to the
brake. Driver Shift Control can
be switched on to override the
feature and gain complete control
of shifts if desired.
Parking Brake
To set the parking brake, pull up on
the parking brake handle. If the
ignition is in the ON/RUN position,
the brake system warning light
will come on. SeeBrake System
Warning Light on page 4-16.To release the parking brake:
1. Hold the brake pedal down.
2. Pull the parking brake handle up
until you can press the release
button.
3. Hold the release button in as you
move the brake handle all the
way down.
Notice:Driving with the parking
brake on can overheat the
brake system and cause
premature wear or damage to
brake system parts. Make
sure that the parking brake is
fully released and the brake
warning light is off before driving.
Driving with the park brake applied
will cause a warning chime to
sound and the Park Brake message
to appear in the DIC. The message
will remain on until:
the park brake is released
the vehicle comes to a stop.
If you are towing a trailer and you
are parking on a hill, seeTowing a
Trailer on page 9-85.
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2008 - Pontiac G8 Owner Manual

Shifting Into Park
(Automatic Transmission)
{CAUTION
It can be 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. If you have left
the engine 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, use the steps that
follow. If you are pulling a
trailer, seeTowing a Trailer
on page 9-85.Use this procedure to shift into
P (Park):
1. Hold the brake pedal down and
set the parking brake.
SeeParking Brake on page 8-9
for more information.
2. Move the shift lever into P (Park)
by holding in the button on the
shift lever and pushing the
lever all the way toward the
front of the vehicle.
3. Turn the ignition key to
LOCK/OFF.
4. Remove the key and take it
with you. If you can leave
your vehicle with the ignition
key in your hand, your vehicle
is in P (Park).
Leaving Your Vehicle With the
Engine Running
{CAUTION
It can be dangerous to leave
the vehicle with the engine
running. The vehicle could
move suddenly if the shift lever
is not fully in P (Park) with the
parking brake rmly set.
And, if you leave the vehicle
with the engine running, it
could overheat and even catch
re. You or others could be
injured. Do not leave the
vehicle with the engine running.
If you have to leave your vehicle
with the engine running, be
sure your vehicle is in P (Park) and
your parking brake is rmly set
before you leave it. After you have
moved the shift lever into P (Park),
hold the brake pedal down.
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2008 - Pontiac G8 Owner Manual

Engine Exhaust
{CAUTION
Engine exhaust can kill.
It contains the gas carbon
monoxide (CO), which you
cannot see or smell. It can cause
unconsciousness and death.
You might have exhaust
coming in if:
The exhaust system sounds
strange or different.
Your vehicle gets rusty
underneath.
Your vehicle was damaged in
a collision.
(Continued)
CAUTION (Continued)
Your vehicle was damaged
when driving over high
points on the road or over
road debris.
Repairs were not done
correctly.
Your vehicle or the exhaust
system has been modied
improperly.
If you ever suspect exhaust is
coming into your vehicle:
Drive it only with all the
windows down to blow out
any CO.
Have your vehicle xed
immediately.
Running the Vehicle
While Parked
It is better not to park with the
engine running. But if you ever have
to, here are some things to know.
{CAUTION
Idling the engine with the
climate control system off
could allow dangerous exhaust
into your vehicle. See the
earlier caution underEngine
Exhaust on page 8-12.
Also, idling in a closed-in place
can let deadly carbon monoxide
(CO) into your vehicle even if
the climate control fan is at the
highest setting. One place
this can happen is a garage.
Exhaust — with CO — can come
in easily. NEVER park in a
garage with the engine running.
Also see “If You Are Caught in a
Blizzard” underWinter Driving
on page 8-25.
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{CAUTION
It can be dangerous to get out
of your vehicle if the shift lever
is not fully in PARK (P) with the
parking brake rmly set. Your
vehicle can roll. Do not leave
your vehicle when the engine is
running unless you have to.
If you have left the engine
running, the vehicle can move
suddenly. You or others could
be injured. To be sure your
vehicle will not move, even
when you are on fairly level
ground, always set the parking
brake and move the shift lever
to PARK (P).
Follow the proper steps to be sure
your vehicle will not move. See
Shifting Into Park (Automatic
Transmission) on page 8-10.
If you are parking on a hill and if
you are pulling a trailer, also
seeTowing a Trailer on page 9-85.
Driving Your Vehicle
Defensive Driving
Defensive driving means “always
expect the unexpected.” The
rst step in driving defensively is to
wear your safety belt, seeSafety
Belts on page 1-5.
{CAUTION
Assume that other road users
(pedestrians, bicyclists, and
other drivers) are going to be
careless and make mistakes.
Anticipate what they might do
and be ready. In addition:
Allow enough following
distance between you and
the driver in front of you.
Focus on the task of driving.
Driver distraction can cause
collisions resulting in injury or
possible death. These simple
defensive driving techniques
could save your life.
Drunk Driving
{CAUTION
Drinking and then driving is
very dangerous. Your reexes,
perceptions, attentiveness, and
judgment can be affected by
even a small amount of alcohol.
You can have a serious — or
even fatal — collision if you
drive after drinking. Do not
drink and drive or ride with a
driver who has been drinking.
Ride home in a cab; or if you
are with a group, designate a
driver who will not drink.
Death and injury associated with
drinking and driving is a global
tragedy.
Alcohol affects four things that
anyone needs to drive a vehicle:
judgment, muscular coordination,
vision, and attentiveness.
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And, of course, actual stopping
distances vary greatly with the
surface of the road, whether it is
pavement or gravel; the condition of
the road, whether it is wet, dry, or
icy; tire tread; the condition of
the brakes; the weight of the
vehicle; and the amount of brake
force applied.
Avoid needless heavy braking.
Some people drive in
spurts — heavy acceleration
followed by heavy braking — rather
than keeping pace with traffic.
This is a mistake. The brakes might
not have time to cool between
hard stops. The brakes will wear out
much faster if you do a lot of heavy
braking. If you keep pace with
the traffic and allow realistic
following distances, you will
eliminate a lot of unnecessary
braking. That means better braking
and longer brake life.If your vehicle’s engine ever stops
while you are driving, brake normally
but do not pump the brakes.
If you do, the pedal could get harder
to push down. If the engine stops,
you will still have some power brake
assist. But you will use it when
you brake. Once the power assist is
used up, it can take longer to
stop and the brake pedal will be
harder to push.
Adding non-dealer/non-retailer
accessories can affect your vehicle’s
performance. SeeAccessories
and Modifications on page 9-3.Antilock Brake
System (ABS)
Your vehicle has the Antilock
Brake System (ABS), an advanced
electronic braking system that
will help prevent a braking skid.
When you start the engine and
begin to drive away, ABS will check
itself. You might hear a momentary
motor or clicking noise while this
test is going on, and you might even
notice that the brake pedal moves
a little. This is normal.
If there is a problem with ABS,
this warning light will stay on.
SeeAntilock Brake System (ABS)
Warning Light on page 4-17.
Let us say the road is wet and you
are driving safely. Suddenly, an
animal jumps out in front of you.
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