warning HUMMER H3 2008 User Guide

Hazard Warning Flashers
The hazard warning ashers let you warn the police and
others that you have a problem. The front and rear
turn signal lamps will ash on and off.
The hazard warning
asher button is located
towards the center of
the instrument panel.
Press the button to make the front and rear turn signal
lamps ash on and off. Press the button again to
turn the ashers off.While the hazard warning ashers are on, the turn
signals do not work.
The hazard warning ashers work no matter what
position the key is in, and even if the key is not in the
ignition switch.
Other Warning Devices
If you carry reective triangles, you can set one up at
the side of the road about 300 feet (100 m) behind your
vehicle.
Horn
To sound the horn, press the horn symbol on the
steering wheel pad.
3-6

Turn and Lane-Change Signals
The turn signal has one upward (for right) and
one downward (for left) positions. These positions
allow you to signal a turn or a lane change.
To signal a turn, move the lever all the way up or down.
When the turn is nished, the lever will automatically
return to the off position.
To signal a lane change, raise or lower the lever until
the arrow starts to ash. Hold it there until the change is
completed. The lever will return by itself when released.
An arrow on the instrument
panel cluster will ash in
the direction of the
turn or lane change.As you signal a turn or a lane change, if the arrows
ash more quickly than normal, a signal bulb may
be burned out and other drivers will not see your
vehicle’s turn signal.
If a bulb is burned out, replace it to help avoid an
accident. If the arrows do not go on at all when signaling
a turn, check for a burned-out bulb or a blown fuse.
For bulb replacement, seeTaillamps, Turn Signal,
Stoplamps and Back-up Lamps on page 5-50. For a
blown fuse or circuit breaker, seeFuses and Circuit
Breakers on page 5-102
Turn Signal On Chime
If a turn signal is left on for more than 3/4 of a mile
(1.2 km), a chime will sound at each ash of the turn
signal and the message TURN SIGNAL will also appear
in the DIC. To turn the chime and message off, move
the turn signal lever to the off position.
See “TURN SIGNAL” underDIC Warnings and
Messages on page 3-43DIC Warnings and Messages
for more information.
3-8

Move the louvers up or down to change the direction of
the airow. Use the thumbwheel under the outlets to
change the direction of the airow from left to right.
Operation Tips

Enable recirculation mode for maximum air
conditioning performance.
Clear away any ice, snow or leaves from the air
inlets at the base of the windshield that may
block the ow of air into your vehicle.
Use of non-GM approved hood deectors may
adversely affect the performance of the system.
Keep the path under the front seats clear of objects
to help circulate the air inside of your vehicle more
effectively.
Warning Lights, Gages, and
Indicators
This part describes the warning lights and gages on
your vehicle. The pictures help to locate them.
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 also save you or others
from injury.Warning lights come on when there may be or is a
problem with one of your vehicle’s functions. As the
details show on the next few pages, some warning lights
come on briey when you start the engine just to let you
know they are working. If you are familiar with this
section, you should not be alarmed when this happens.
Gages can indicate when there may be or is a problem
with one of your vehicle’s functions. Often gages and
warning lights work together to let you know when there is
a problem with your vehicle.
When one of the warning lights comes on and stays on as
you are driving, or when one of the gages shows there
may be a problem, check the section that tells you what
to do about it. Please follow this manual’s advice. Waiting
to do repairs can be costly and even dangerous. So
please get to know your vehicle’s warning lights and
gages. They can be a big help.
Your vehicle may also have a Driver Information Center
(DIC) that works along with the warning lights and gages.
SeeDriver Information Center (DIC) on page 3-40for
more information.
3-25

Speedometer and Odometer
The speedometer lets you see your speed in both miles
per hour (mph) and kilometers per hour (km/h).
The odometer shows how far your vehicle has been
driven, in either miles (used in the United States)
or kilometers (used in Canada).
The odometer mileage can be checked without the
vehicle running by pressing the trip information stem.
See “Odometer” underDIC Operation and Displays
on page 3-40for more information.
If the cluster is replaced the new one will automatically
detect and update the vehicle’s accumulated mileage.
Trip Odometer
Your vehicle has a trip odometer that can tell you how
far your vehicle has been driven since you last set
the trip odometer to zero.
See “Trip Odometer” underDIC Operation and Displays
on page 3-40for more information.
Tachometer
The tachometer
displays the engine
speed in revolutions
per minute (rpm).
Notice:If you operate the engine with the
tachometer in the shaded warning area, your vehicle
could be damaged, and the damages would not
be covered by your warranty. Do not operate
the engine with the tachometer in the shaded
warning area.3.7L L5 Shown,
5.3L V8 Similar
3-27

Airbag Readiness Light
There is an airbag readiness light on the instrument
panel cluster, which shows the airbag symbol. The
system checks the airbag’s electrical system for
malfunctions. The light tells you if there is an electrical
problem. The system check includes the airbag
sensor, the pretensioners, the airbag modules, the
wiring and the crash sensing and diagnostic module.
For more information on the airbag system, seeAirbag
System on page 1-54.
This light will come on
when you start your
vehicle, and it will ash
for a few seconds.
The light should go out
and the system is ready.
If the airbag readiness light stays on after you start
the vehicle or comes on when you are driving,
your airbag system may not work properly. Have
your vehicle serviced right away.{CAUTION:
If the airbag readiness light stays on after you
start your vehicle, it means the airbag system
may not be working properly. The airbags in
your vehicle may not inate in a crash, or they
could even inate without a crash. To help
avoid injury to yourself or others, have your
vehicle serviced right away if the airbag
readiness light stays on after you start your
vehicle.
The airbag readiness light should ash for a few
seconds when you start the engine. If the light does not
come on then, have it xed immediately. If there is a
problem with the airbag system, an airbag Driver
Information Center (DIC) message may also come on.
SeeDIC Warnings and Messages on page 3-43for
more information.
3-29

Charging System Light
This light will come on
briey when you turn on
the ignition, but the engine
is not running, as a
check to show you it
is working.
It should go out once the engine is running. If it stays
on, or comes on while you are driving, you may have a
problem with the charging system. A charging system
Driver Information Center (DIC) message may also
appear. SeeDIC Warnings and Messages on page 3-43
for more information. This light could indicate that you
have problems with a generator drive belt, or another
electrical problem. Have it checked right away. If
you must drive a short distance with the light on, be
certain to turn off all your accessories, such as the radio
and air conditioner.
Up-Shift Light
Your vehicle may have an
up-shift light.
When this light comes on, you should shift to the next
higher gear if weather, road, and traffic conditions allow
you to.
SeeManual Transmission Operation on page 2-26for
more information.
3-32

Brake System Warning Light
Your vehicle’s hydraulic brake system is divided into
two parts. If one part is not working, the other part can
still work and stop you. For good braking, though,
you need both parts working well.
If the warning light comes on, there could be a brake
problem. Have your brake system inspected right away.
This light should come on briey when you turn the
ignition key to ON. If it does not come on then, have it
xed so it will be ready to warn you if there is a
problem.When the ignition is on, the brake system warning light
will also come on when you set your parking brake.
SeeParking Brake on page 2-32for more information.
The light will stay on if your parking brake does not
release fully. If it stays on after your parking brake is
fully released, it means you have a brake problem.
If the light comes on while you are driving, pull off the
road and stop carefully. You may notice that the pedal is
harder to push, or the pedal may go closer to the
oor. It may take longer to stop. If the light is still on,
have the vehicle towed for service. SeeTowing
Your Vehicle on page 4-48.
{CAUTION:
Your brake system may not be working
properly if the brake system warning light is
on. Driving with the brake system warning light
on can lead to an accident. If the light is still
on after you have pulled off the road and
stopped carefully, have the vehicle towed for
service. United StatesCanada
3-33

Antilock Brake System Warning
Light
For vehicles with the
Antilock Brake System
(ABS), this light will come
on briey when you
start the engine.
That is normal. If the light does not come on then, have it
xed so it will be ready to warn you if there is a problem.
If the ABS light stays on, turn the ignition off, if the light
comes on when you are driving, stop as soon as it
is safely possible and turn the ignition off. Then start the
engine again to reset the system. If the ABS light still
stays on, or comes on again while you are driving, your
vehicle needs service. If the regular brake system
warning light is not on, you still have brakes, but you do
not have antilock brakes. If the regular brake system
warning light is also on, you do not have antilock brakes
and there is a problem with your regular brakes. See
Brake System Warning Light on page 3-33
For vehicles with a Driver Information Center (DIC), see
DIC Warnings and Messages on page 3-43for all
brake related DIC messages.
Traction Off Light
If you have the Traction
Control System (TCS), this
light will come on when the
TCS has been turned off.
This light will come on briey when the ignition is turned
to ON, if it does not the system may require service.
For more information on the traction off light, see
Traction Control System (TCS) on page 4-5.
StabiliTrak®Not Ready Light
If you have the StabiliTrak®
system, this light will come
on when the StabiliTrak®
system has been
turned off.
This light will come on briey when the ignition is turned
to ON, if it does not the system may require service.
For more information, seeStabiliTrak
®System on
page 4-7.
3-34

Engine Coolant Temperature Gage
This gage shows the engine coolant temperature.
If the gage pointer is in the shaded area of the gage,
the engine is too hot. It means that your engine coolant
has overheated. If you have been operating your
vehicle under normal driving conditions, you should pull
off the road, stop your vehicle and turn off the engine
as soon as possible.
SeeEngine Overheating on page 5-29for more
information.
Tire Pressure Light
This light comes on briey
when the engine is started.
This light will also come on when one or more of your
tires are signicantly underinated.
A tire pressure message in the Driver Information
Center (DIC), may accompany the light. SeeDIC
Warnings and Messages on page 3-43for 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 5-54for more information.
If a problem is detected with the Tire Pressure Monitor
System, this light will ash for approximately
60 seconds and then stay on solid for the remainder of
the ignition cycle. SeeTire Pressure Monitor System
on page 5-63for more information. United States
Canada
3-35

Fuel Gage
When the ignition is on, the fuel gage tells you about
how much fuel you have remaining in the fuel tank.
Here are three things that some owners ask about. None
of these indicate a problem with your fuel gage:
At the gas station, the gas pump shuts off before
the gage reads full.
It takes a little more or less fuel to ll up than the
gage indicated. For example, the gage may have
indicated the tank was half full, but it actually took a
little more or less than half the tank’s capacity to
ll the tank.
The gage moves a little when you turn a corner or
speed up.When the fuel in the fuel tank is low, you will see a
LOW FUEL message on the Driver Information
Center (DIC) display. SeeDIC Warnings and Messages
on page 3-43for more information.
Driver Information Center (DIC)
The Driver Information Center (DIC) displays information
such as the trip odometer, personalization features,
and warning messages. The DIC display is located on
the instrument panel cluster.
DIC Operation and Displays
The Driver Information Center (DIC) comes on when the
ignition is on.
If a problem is detected, a warning message appears
on the display. Pressing and releasing the trip odometer
reset stem on the DIC acknowledges some current
warnings or service messages. Some messages only
clear after the required action has been taken.
The DIC has different modes which can be accessed by
pressing the trip odometer reset stem on the DIC.
These modes are explained in the following section.
The DIC trip odometer reset stem is located on
the instrument panel cluster next to the DIC display.
To scroll through the available functions, press
and release the reset stem. United States
Canada
3-40