2008 PONTIAC G8 engine

3. Turn the band down to SET−
and then release it. The
CRUISE ACTIVE light comes on
in the instrument panel cluster.
4. Take your foot off the accelerator
pedal.
If the vehicle is in cruise control and
the Electronic Stability Program
(ESP) becomes active, the cruise
control automatically disengages.
SeeElectronic Stability Program on
page 8-16. When road conditions
allow the cruise control can be
used again.
Resuming a Set Speed
If the cruise control is set at a
desired speed and then the brakes
are applied or the
OQbutton
is pressed once, the cruise control
shuts off.Once the vehicle speed is 21 mph
(33 km/h) (V6 engines) or 24 mph
(38 km/h) (V8 engines) or greater,
turn the band briey to RES+
position. The vehicle returns to the
previously set speed and stays there.
Increasing Speed While Using
Cruise Control
There are two ways to go to a
higher speed:
Turn theIband up to the
RES+ position. Hold it there until
the desired speed is reached,
then release it.
To increase the vehicle speed in
very small amounts, turn the
band to RES+ briey and then
release it. Each time this is done,
the vehicle goes about 1 mph
(1.6 km/h) faster.Reducing Speed While Using
Cruise Control
There are two ways to reduce the
vehicle speed while using cruise
control:
Turn theIband down to the
SET−position. Hold it there
until the lower speed desired is
reached, then release it.
To slow down in very small
amounts, turn the band to
SET−briey and then release it.
Each time this is done, the
vehicle will go about 1 mph
(1.6 km/h) slower.
Passing Another Vehicle While
Using Cruise Control
Use the accelerator pedal to
increase the vehicle speed. When
you take your foot off the pedal, the
vehicle slows down to the cruise
control speed set earlier.
4-6 Instruments and Controls
2008 - Pontiac G8 Owner Manual

Warning Lights,
Gages, and Indicators
This section describes the warning
lights and gages on the vehicle.
Warning lights and gages can signal
that something is wrong before it
becomes serious enough to
cause an expensive repair or
replacement. Paying attention to the
warning lights and gages could
prevent injury.
Warning lights come on when there
may be or is a problem with one
of the vehicle’s functions. Some
warning lights come on briey when
the engine is started to indicate
they are working.Gages can indicate when there may
be or is a problem with one of the
vehicle’s functions. Often gages and
warning lights work together to
indicate a problem with the vehicle.
When one of the warning lights
comes on and stays on while
driving, or when one of the gages
shows there may be a problem,
check the section that explains what
to do. Follow this manual’s advice.
Waiting to do repairs can be
costly and even dangerous.
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2008 - Pontiac G8 Owner Manual

Speedometer
The speedometer can display your
speed in both miles per hour
(MPH) and kilometers per hour
(km/h). You can select between
MPH and km/h using the UNITS
display in the DIC. SeeDIC
Operation and Displays on
page 4-23for more information.
Tachometer
The tachometer displays the engine
speed in revolutions per minute.
Safety Belt Reminders
Safety Belt Reminder Light
When the engine is started, a chime
will come on for several seconds
to remind people to fasten their
safety belts, unless the driver’s
safety belt is already buckled.
The safety belt light will also come on
and stay on for several seconds,
then it will ash for several more.
This chime and light is repeated if
the driver remains unbuckled
and the vehicle is in motion. If the
driver’s belt is already buckled,
neither the chime nor the light will
come on.
Passenger Safety Belt
Reminder Light
If your vehicle has this light, several
seconds after the engine is
started, a chime will sound for
several seconds to remind the front
passenger to buckle their safety
belt. The passenger safety belt light
will also come on and stay on for
several seconds, then it will ash for
several more.
This chime and light are repeated if
the passenger remains unbuckled
and the vehicle is in motion.
If the passenger’s safety belt is
buckled, neither the chime nor the
light will come on.
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{CAUTION
Even though the passenger
sensing system is designed to
turn off the right front
passenger’s frontal airbag if the
system detects a rear-facing
child restraint, no system is
fail-safe, and no one can
guarantee that an airbag will
not deploy under some unusual
circumstance, even though it is
turned off. We recommend that
rear-facing child restraints be
secured in the rear seat, even if
the airbag is off.
If the word OFF or the off symbol is
lit on the passenger airbag status
indicator, it means that the
passenger sensing system has
turned off the right front passenger
frontal airbag. SeePassenger
Sensing System on page 1-26for
more information, including
important safety information.If, after several seconds, both status
indicator lights remain on, or if
there are no lights at all, there may
be a problem with the lights or
the passenger sensing system. See
your dealer/retailer for service.
{CAUTION
If the airbag readiness light in
the instrument panel cluster
ever comes on and stays on, it
means that something may be
wrong with the airbag system.
If this ever happens, have the
vehicle serviced promptly,
because an adult-size person
sitting in the right front
passenger’s seat may not have
the protection of the airbag(s).
SeeAirbag Readiness Light on
page 4-13for more on this,
including important safety
information.
Voltmeter Gage
The voltmeter shows the voltage
output of your battery.
It is located in the center of the
instrument panel.
Charging System Light
This light will come on briey when
you turn on the ignition, and the
engine is not running, as a check to
show it is working. Then it should
go out when the engine is started.
If the light comes on and an
Alternator message on the Driver
Information Center (DIC) stays
on, you may have a problem with
the electrical charging system. Have
it checked by your dealer/retailer.
Instruments and Controls 4-15
2008 - Pontiac G8 Owner Manual

Antilock Brake System
(ABS) Warning Light
For vehicles with the Antilock Brake
System (ABS), this light will come
on briey, as a check, when
you start your vehicle.
If it does not, have your vehicle
serviced so that the light works
properly when it needs to.
If the light and a message in the
DIC stays on longer than a few
seconds after you start your engine,
or comes on and stays on while
you are driving, try resetting
the system. To reset the system:
1. If you are driving, pull over when
it is safe to do so.
2. Place the vehicle in PARK (P).
3. Turn off the ignition.
4. Then restart the engine.If the light remains on after resetting
the system or comes on again
while driving, your vehicle needs
service. If the ABS light is on,
but the regular brake system
warning light is not on, the antilock
brakes are not working properly,
but the regular brakes are still
functioning. Have your vehicle
serviced right away. If both brake
lights are on, you do not have
antilock brakes, and there’s a
problem with your regular brakes as
well. Have your vehicle towed for
service. SeeTowing Your Vehicle
on page 9-84.
The ABS Fault message will remain
until
3(Trip/Fuel) or8(Enter)
are pressed, but the warning
light will remain until the problem is
xed. SeeDIC Warnings and
Messages on page 4-27for more
information.
Engine Coolant
Temperature Gage
This gage shows the engine coolant
temperature. If the gage pointer
moves into the red area, the engine
is too hot. It means that the engine
has overheated. Pull off the road,
stop the vehicle, and turn off the
engine as soon as possible. See
Engine Overheating on page 9-16.
Instruments and Controls 4-17
2008 - Pontiac G8 Owner Manual

Tire Pressure Light
TPMS Light
This light comes on briey when the
engine is started and provides
information about tire pressures and
the Tire Pressure Monitoring System.
When the Light is Solid
This light will also come on when
one or more of your tires are
signicantly underinated. A CHECK
TIRE PRESSURE DIC message
will accompany the light.
SeeDIC Warnings and Messages
on page 4-27for more information.Stop and check your tires as soon as
it is safe to do so. If underinated,
inate to the proper pressure. See
Tires on page 9-39for more
information.
When the Light Flashes First and
Then is Solid
This indicates that there may be a
problem with the Tire Pressure
Monitor System.
The light ashes for about a minute
and stays on solid for the
remainder of the ignition cycle. This
sequence will repeat with every
ignition cycle. SeeTire Pressure
Monitor System on page 9-49
andTire Pressure Monitor Operation
on page 9-51for more information.
Malfunction
Indicator Lamp
Check Engine Light
A computer system called OBD II
(On-Board Diagnostics-Second
Generation) monitors operation of
the fuel, ignition, and emission
control systems. It makes sure that
emissions are at acceptable
levels for the life of the vehicle,
helping to produce a cleaner
environment.
This light comes on briey, as a
check to show it is working,
when the ignition is turned to
ON/RUN. If the light does not come
on, see your dealer/retailer.
If the light stays on it indicates that
there is an OBD II problem and
service is required.
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2008 - Pontiac G8 Owner Manual

Malfunctions often are indicated by
the system before any problem
is apparent. Heeding the light can
prevent more serious damage
to your vehicle. This system assists
your service technician in correctly
diagnosing any malfunction.
Notice:If you keep driving your
vehicle with this light on, after
a while, the emission controls
might not work as well, your
vehicle’s fuel economy might not
be as good, and the engine
might not run as smoothly. This
could lead to costly repairs
that might not be covered by your
warranty.
Notice:Modications made to
the engine, transmission, exhaust,
intake, or fuel system of your
vehicle or the replacement of the
original tires with other than those
of the same Tire Performance
Criteria (TPC) can affect your
vehicle’s emission controls and
can cause this light to come on.
Modications to these systemscould lead to costly repairs not
covered by your warranty. This
could also result in a failure to
pass a required Emission
Inspection/Maintenance test.
SeeAccessories and
Modifications on page 9-3.
This light comes on during a
malfunction in one of two ways:
Light Flashing:A misre condition
has been detected. A misre
increases vehicle emissions and
could damage the emission control
system on your vehicle. Diagnosis
and service might be required.
The following can prevent more
serious damage to your vehicle:
Reduce vehicle speed.
Avoid hard accelerations.
Avoid steep uphill grades.
If you are towing a trailer, reduce
the amount of cargo being
hauled as soon as it is possible.If the light continues to ash, when
it is safe to do so, stop the
vehicle. Find a safe place to park
the vehicle. Turn the key off, wait at
least 10 seconds, and restart the
engine. If the light is still ashing,
follow the previous steps and
see your dealer/retailer for service
as soon as possible.
Light On Steady:An emission
control system malfunction has been
detected on your vehicle. Diagnosis
and service might be required.
You might be able to correct the
emission system malfunction
by considering the following:
Make sure the fuel cap is fully
installed. SeeFilling the Tank
on page 8-35. The diagnostic
system can determine if the fuel
cap has been left off or
improperly installed. A loose or
missing fuel cap allows fuel
to evaporate into the atmosphere.
A few driving trips with the cap
properly installed should turn
the light off.
Instruments and Controls 4-19
2008 - Pontiac G8 Owner Manual

If you just drove through a deep
puddle of water, your vehicle’s
electrical system might be
wet. The condition is usually
corrected when the electrical
system dries out. A few driving
trips should turn the light off.
If you recently changed brands of
fuel, be sure to fuel your vehicle
with quality fuel. SeeGasoline
Octane on page 8-33. Poor
fuel quality causes the engine
not to run as efficiently as
designed. You might notice this
as stalling after start-up,
stalling when you put the vehicle
into gear, misring, hesitation
on acceleration, or stumbling on
acceleration — these conditions
might go away once the
engine is warmed up.
If you experience one or more of
these conditions, change the
fuel brand you use. It will require
at least one full tank of the
proper fuel to turn the light off.If none of the above have made
the light turn off, your dealer/retailer
can check the vehicle. Your
dealer/retailer has the proper test
equipment and diagnostic tools to
x any mechanical or electrical
problems that might have
developed.
Emissions Inspection and
Maintenance Programs
Some state/provincial and local
governments have or might begin
programs to inspect the emission
control equipment on your vehicle.
Failure to pass this inspection
could prevent getting a vehicle
registration.Here are some things to know to
help your vehicle pass an
inspection:
Your vehicle will not pass this
inspection if the check engine
light is on or not working properly.
Your vehicle will not pass
this inspection if the OBD
(on-board diagnostic) system
determines that critical emission
control systems have not
been completely diagnosed by
the system. The vehicle would be
considered not ready for
inspection. This can happen if
you have recently replaced
the battery or if the battery has
run down. The diagnostic system
is designed to evaluate critical
emission control systems
during normal driving. This can
take several days of routine
driving. If you have done this and
your vehicle still does not pass
the inspection for lack of
OBD system readiness, your
dealer/retailer can prepare
the vehicle for inspection.
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2008 - Pontiac G8 Owner Manual