
Charging System Light
The charging system light comes on
briefly when the ignition is turned
on but the engine is not running,
as a check to show the light is
working. It should go out when the
engine is started.
If the light stays on, or comes on
while driving, there may be a
problem with the electrical charging
system. Have it checked by your
dealer/retailer. Driving while this light
is on could drain the battery.
When this light comes on, the Driver
Information Center (DIC) also
displays a message.
SeeBattery Voltage and Charging
Messages on page 4-30.If a short distance must be driven
with the light on, be sure to turn off
all accessories, such as the radio
and air conditioner.
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 ensures that
emissions are at acceptable levels
for the life of the vehicle, helping
to produce a cleaner environment.
This light comes on when the
ignition is on, but the engine is not
running, as a check to show itis working. If it does not, have
the vehicle serviced by your
dealer/retailer.
If the check engine light comes on
and stays on, while the engine
is running, this indicates that there
is an OBD II problem and service
is required.
Malfunctions often are indicated by
the system before any problem
is apparent. Being aware of the light
can prevent more serious damage
to the vehicle. This system assists
the service technician in correctly
diagnosing any malfunction.
Notice:If the vehicle is
continually driven with this light
on, after a while, the emission
controls might not work as well,
the 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 the
vehicle warranty.
Instruments and Controls 4-19

•Make sure to fuel the vehicle with
quality fuel. Poor fuel quality
causes the engine not to run as
efficiently as designed and can
cause: stalling after start-up,
stalling when the vehicle is
changed into gear, misfiring,
hesitation on acceleration, or
stumbling on acceleration. These
conditions might go away once
the engine is warmed up.
If one or more of these conditions
occurs, change the fuel brand
used. It will require at least one
full tank of the proper
fuel to turn the light off.
SeeGasoline Speci cations
on page 8-44.
If none of the above have made the
light turn off, your dealer/retailer can
check the vehicle. The dealer/retailer
has the proper test equipment and
diagnostic tools to fix 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 the vehicle.
Failure to pass this inspection
could prevent getting a vehicle
registration.
Here are some things to know to
help the vehicle pass an inspection:
•The vehicle will not pass this
inspection if the check engine
light is on with the engine
running, or if the key is in
ON/RUN and the light is not on.
•The vehicle will not pass
this inspection if the OBD II
(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 forinspection. This can happen
if the battery has recently been
replaced 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 this has been done and the
vehicle still does not pass
the inspection for lack of
OBD II system readiness,
your dealer/retailer can prepare
the vehicle for inspection.
Instruments and Controls 4-21

OnStar Turn by Turn
This display is used for the OnStar
Turn by Turn guidance. SeeOnStar
®
System on page 4-42for more
information.
Blank Display
This display shows no information.
Vehicle Information
Menu Items
Press the MENU button on the
turn signal lever until Vehicle
Information Menu is displayed.
Use the thumbwheel to scroll
through the following menu items:
•Unit
•Tire Pressure
•Remaining Oil Life
•Coolant Temp
•Battery Voltage
•Speed WarningUnit
Move the thumbwheel up or down to
switch between US or Metric when
the Unit display is active. Press SET
to confirm the setting. This will
change the displays on the cluster
and DIC to either English (US) or
metric measurements.
Tire Pressure
The display will show a vehicle with
the approximate pressures of all
four tires. Tire pressure is displayed
in either pounds per square
inch (psi) or in kilopascal (kPa).
SeeTire Pressure Monitor System
on page 9-56andTire Pressure
Monitor Operation on page 9-57
for more information.
Remaining Oil Life
This display shows an estimate
of the oil’s remaining useful life.
If Remaining Oil Life 99% is
displayed, that means 99% of
the current oil life remains.When the remaining oil life is low,
the CHANGE ENGINE OIL SOON
message will appear on the
display. SeeEngine Oil Messages
on page 4-32. The oil should
changed as soon as possible.
SeeEngine Oil on page 9-10.
In addition to the engine oil life
system monitoring the oil life,
additional maintenance is
recommended in the Maintenance
Schedule in this manual.
SeeScheduled Maintenance on
page 10-2for more information.
Remember, the Oil Life display
must be reset after each oil change.
It will not reset itself. Also, be
careful not to reset the Oil Life
display accidentally at any time
other than when the oil has
just been changed. It cannot be
reset accurately until the next
oil change. To reset the engine oil
life system press the SET button
while the Oil Life display is active.
SeeEngine Oil Life System on
page 9-13.
Instruments and Controls 4-29

Coolant Temperature
This display shows the temperature
of the engine cooling system fluid in
either degrees Fahrenheit (°F) or
degrees Celsius (°C).
Battery Voltage
This display, available on some
vehicles, shows the current battery
voltage. If the voltage is in the
normal range, the value will display.
For example, the display may
read Battery Voltage 15.0 Volts.
The vehicle’s charging system
regulates voltage based on the
state of the battery. The battery
voltage can fluctuate while viewing
this information on the DIC.
This is normal. SeeCharging
System Light on page 4-19
for more information.If there is a problem with the battery
charging system, the DIC will
display a message. SeeBattery
Voltage and Charging Messages
on page 4-30.
Speed Warning
Speed Warning allows the driver to
set a speed that they do not want
to exceed. To set the Speed
Warning press SET when Speed
Warning is displayed.
Compass
The vehicle may have a compass
display in the Driver Information
Center (DIC). SeeCompass
on page 4-8for more information.
Vehicle Messages
Battery Voltage and
Charging Messages
Battery Saver Active
This message displays when the
vehicle has detected that the battery
voltage is dropping beyond a
reasonable point. The battery saver
system starts reducing certain
features of the vehicle that you may
be able to notice. At the point that
features are disabled, this message
is displayed. It means that the
vehicle is trying to save the charge in
the battery. Turn off unnecessary
accessories to allow the battery to
recharge.
4-30 Instruments and Controls

Low Battery
This message is displayed when the
battery voltage is low. SeeBattery
on page 9-29for more information.
Service Battery Charging
System
This message is displayed when
there is a fault in the battery
charging system. Take the vehicle
to your dealer/retailer for service.
Brake System Messages
Brake Fluid Low
This message is displayed when the
brake fluid level is low, seeBrake
Fluid on page 9-28.
Release Parking Brake
This message is displayed as a
reminder that the parking brake is
on. Release it before you attempt
to drive.
Compass Messages
Service Compass
This message is displayed when the
compass needs service. Take the
vehicle to your dealer/retailer for
service.
Cruise Control Messages
Apply Brakes Before Cruise
If this message displays when
attempting to activate cruise control,
apply the brake and then try again.
Cruise Set to XXX
This message will display when the
cruise control is set and it will
show the speed it was set to.
SeeCruise Control on page 8-38
for more information.
Door Ajar Messages
Driver Door Open
This message will display when the
driver door is open. Close the door
completely.
Hood Open
This message will display when
the hood is open. Close the hood
completely.
Passenger Door Open
This message will display when the
passenger door is open. Close the
door completely.
Trunk Open
This message will display when
the trunk is open. Close the trunk
completely.
Instruments and Controls 4-31

Oil Pressure Low – Stop
Engine
This message displays if low oil
pressure levels occur. Stop the
vehicle as soon as safely possible
and do not operate it until the cause
of the low oil pressure has been
corrected. Check the oil as soon as
possible and have your vehicle
serviced by your dealer/retailer.
Engine Power Messages
Engine Power Is Reduced
This message displays when the
vehicle’s engine power is reduced.
Reduced engine power can affect the
vehicle’s ability to accelerate. If this
message is on, but there is no
reduction in performance, proceed to
your destination. The performance
may be reduced the next time the
vehicle is driven. The vehicle may
be driven at a reduced speed whilethis message is on, but maximum
acceleration and speed may be
reduced. Anytime this message
stays on, the vehicle should be taken
to your dealer/retailer for service as
soon as possible.
Fuel System Messages
Fuel Level Low
This message displays when the
vehicle is low on fuel. Refuel
as soon as possible
Tighten Gas Cap
This message displays when the
fuel cap is not on tight. Tighten the
fuel cap.
Change Fuel Filter
This message displays when the
fuel needs to be replaced. Take the
vehicle to your dealer/retailer for
service.
Key and Lock Messages
Number Of Keys Programmed
This message displays when
programming new keys to the
vehicle.
Replace Battery In Remote Key
This message displays when the
battery in the Remote Keyless
Entry (RKE) transmitter needs to be
replaced.
Lamp Messages
Automatic Light Control On
This message is displayed when the
automatic light control has been
turned on. SeeAutomatic Headlamp
System on page 5-3.
Instruments and Controls 4-33

Vehicle Reminder
Messages
Ice Possible Drive With Care
This message is displayed when ice
conditions are possible.
Turn Wiper Control to
Intermittent First
This message is displayed when
attempting to adjust the intermittent
wiper speed without intermittent
selected on the wiper control.
SeeWindshield Wiper/Washer on
page 4-7.
Vehicle Speed Messages
Driver Selected Speed Limit
Exceeded
This message is displayed when the
vehicle speed is greater than the
set speed. See “Speed Warning”
underDriver Information Center
(DIC) on page 4-27.
Vehicle Messages
Messages are displayed on the DIC
to notify the driver that the status
of the vehicle has changed and that
some action may be needed by
the driver to correct the condition.
Multiple messages may appear
one after another.
Some messages may not require
immediate action. For those you can
press SET to acknowledge that
you received the messages and to
clear them. Some messages
cannot be cleared because they are
more urgent. These messages
require action. You should take
any messages that appear on the
display seriously and remember that
clearing the messages will only
make the messages disappear,
not correct the problem. Possible
messages that can be displayed
and some information about them,
grouped by subject, are in the
following information.
Window Messages
Open, Then Close Driver
Window
This message is displayed when the
window needs to be reprogrammed.
If the vehicle’s battery has been
recharged or disconnected, you will
need to reprogram each front
window for the express up feature
to work. SeePower Windows
on page 1-14for more information.
Open, Then Close Passenger
Window
This message is displayed when the
window needs to be reprogrammed.
If the vehicle’s battery has been
recharged or disconnected, you will
need to reprogram each front
window for the express up feature
to work. SeePower Windows
on page 1-14for more information.
Instruments and Controls 4-37

OnStar Virtual Advisor
OnStar Virtual Advisor is a feature
of OnStar Hands-Free Calling
that uses minutes to access
location-based weather, local traffic
reports, and stock quotes. Press
the phone button and give a
few simple voice commands to
browse through the various topics.
See the OnStar Owner’s Guide
for more information. This feature is
only available in the continental U.S.
OnStar Steering Wheel
Controls
This vehicle may have a Talk/Mute
button that can be used to interact
with OnStar Hands-Free Calling.
SeeSteering Wheel Controls on
page 4-6for more information.
On some vehicles, the mute button
can be used to dial numbers into
voice mail systems, or to dial phone
extensions. See the OnStar Owner’s
Guide for more information.
How OnStar Service Works
The OnStar system can record
and transmit vehicle information.
This information is automatically
sent to an OnStar Call Center when
the OnStar button is pressed, the
emergency button is pressed,
or if the airbags or AACN system
deploy. This information usually
includes the vehicle’s GPS location
and, in the event of a crash,
additional information regarding
the crash that the vehicle was
involved in (e.g. the direction from
which the vehicle was hit). When the
Virtual Advisor feature of OnStar
Hands-Free Calling is used,
the vehicle also sends OnStar the
vehicle’s GPS location so they
can provide services where
it is located.
OnStar service cannot work unless
the vehicle is in a place where
OnStar has an agreement with a
wireless service provider for servicein that area. OnStar service also
cannot work unless the vehicle is in
a place where the wireless service
provider OnStar has hired for that
area has coverage, network capacity
and reception when the service is
needed, and technology that is
compatible with the OnStar service.
Not all services are available
everywhere, particularly in remote
or enclosed areas, or at all times.
Location information about the
vehicle is only available if the GPS
satellite signals are unobstructed
and available.
The vehicle must have a working
electrical system, including adequate
battery power, for the OnStar
equipment to operate. There are
other problems OnStar cannot
control that may prevent OnStar
from providing OnStar service at
any particular time or place.
4-44 Instruments and Controls