light HUMMER H3 2009 Service Manual

The off-road lamps button is located
on the instrument panel below
the climate controls.
To use the lamps, remove the
covers from the lamps and press
the button to turn them on or off. An
indicator light turns on when the
lamps are on.
Notice:Turning on the off-road
lamps before removing the
lamp covers could damage the
off-road lamps and the covers.
Always remove the covers before
turning on the off-road lamps. The off-road lamps remain on even
after the ignition is turned off.
The off-road lamp button must be
pressed to turn them off.
Fog Lamps
The vehicle has fog lamps that
provide better visibility in foggy or
misty conditions.
The fog lamp button is located in
the exterior lamps control.
#(Fog Lamps):
The headlamps
or parking lamps must be on for
the fog lamps to work. Press
#to turn the fog lamps on or off. An
indicator light turns on when the fog
lamps are on.
Never use the fog lamps in the dark
without turning on the headlamps.
When the high-beam headlamps are
turned on, the fog lamps turn off
automatically. When the high-beam
headlamps are turned off, the
fog lamps come on again.
Some localities have laws that
require the headlamps to be
on along with the fog lamps.
Instrument Panel
Brightness
This feature controls the brightness
of the instrument panel lights.
The instrument panel brightness
thumbwheel is located next to
the exterior lamp control.
D(Instrument Panel Brightness):
Turn the thumbwheel up or down
to brighten or dim the instrument
panel lights and the radio display.
Instrument Panel 3-15

The instrument panel lights, cluster,
and radio display do not dim to
complete darkness. Turn the
thumbwheel all the way up to turn
the dome lamps on.
Dome Lamp
The dome lamps are located in the
front area of the vehicle. There
is also a dome lamp in the cargo
area of the H3 model only.
Turn the thumbwheel, located next
to the exterior lamps control, all
the way up to turn the dome
and footwell lamps on. In this
position, the lamps remain on
whether a door is opened or closed.
The dome lamp in the cargo area
automatically turns off when:
The shift lever is shifted out of
P (Park) (automatic
transmissions).
The parking brake is released
(manual transmissions).
Dome Lamp Override
E
(Dome Lamp Override):You
can use the dome override
button, located below the exterior
lamps control, to set the dome
and footwell lamps to come
on automatically when a door is
opened, or to remain off. To turn the
lamps off, press the
Ebutton in.
With the button in this position,
the dome lamps will remain off when
the doors are open. To return the
lamps to automatic operation, press
Eagain and return it to the out
position. With the button in this
position, the dome lamps will come
on when a door is opened.
Exit Lighting
The interior lamps will come on
when the key is removed from the
ignition. The lamps will not come on
if the dome override button is
pressed in.
Reading Lamps
The reading lamps are located in
the overhead console.
Press the button located next to
each lamp to turn them on or off.
These lamps will not come on
with the dome lamps.
3-16 Instrument Panel

Electric Power
Management
The vehicle has Electric Power
Management (EPM) that estimates
the battery’s temperature and
state of charge. It then adjusts the
voltage for best performance
and extended life of the battery.
When the battery’s state of charge
is low, the voltage is raised
slightly to quickly bring the charge
back up. When the state of charge is
high, the voltage is lowered
slightly to prevent overcharging. If
the vehicle has a voltmeter gage or
a voltage display on the Driver
Information Center (DIC), you may
see the voltage move up or
down. This is normal. If there is a
problem, an alert will be displayed.
The battery can be discharged
at idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fastenough at idle to produce all the
power that is needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog
lamps, rear window defogger,
climate control fan at high speed,
heated seats, engine cooling fans,
trailer loads, and loads plugged into
accessory power outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator’s
output and the vehicle’s electrical
needs. It can increase engine
idle speed to generate more power,
whenever needed. It can temporarily
reduce the power demands of
some accessories.
Normally, these actions occur in
steps or levels, without being
noticeable. In rare cases at the
highest levels of corrective action,this action may be noticeable to the
driver. If so, a Driver Information
Center (DIC) message might be
displayed, such as BATTERY
SAVER ACTIVE, BATTERY
VOLTAGE LOW, or LOW BATTERY.
If this message is displayed, it is
recommended that the driver reduce
the electrical loads as much as
possible. SeeDIC Warnings and
Messages on page 3-37.
Battery Run-Down
Protection
This feature shuts off the dome
lamp if it is left on for more
than 20 minutes when the ignition is
in LOCK/OFF. This helps to
prevent the battery from being
drained.
Instrument Panel 3-17

Accessory Power
Outlet(s)
The accessory power outlets can be
used to connect auxiliary electrical
equipment, such as a cellular phone.
There are two accessory power
outlets located under the climate
control system. There is also one
accessory power outlet located in the
rear cargo area (H3 model only). Pull
down the small cover to access the
accessory power outlet.
Notice:Leaving electrical
equipment on for extended
periods will drain the battery.
Always unplug electrical
equipment when not in use and
do not plug in equipment that
exceeds the maximum amperage
rating of 20 amperes.
Certain electrical accessories may
not be compatible with the
accessory power outlet and could
result in blown vehicle or adapter
fuses. If you experience a problem,see your dealer/retailer for additional
information on accessory power
outlets.
Notice:Adding any electrical
equipment to the vehicle can
damage it or keep other
components from working as
they should. The repairs would
not be covered by the vehicle
warranty. Do not use equipment
exceeding maximum amperage
rating of 20 amperes. Check with
your dealer/retailer before
adding electrical equipment.
When adding electrical equipment,
be sure to follow the proper
installation instructions included with
the equipment.
Notice:Improper use of the
power outlet can cause damage
not covered by the warranty.
Do not hang any type of
accessory or accessory bracket
from the plug because the
power outlets are designed for
accessory power plugs only.
Ashtray(s) and Cigarette
Lighter
For vehicles with a removable
ashtray, it can be placed into the
cupholder and be removed for
cleaning.
Notice:If papers, pins, or other
ammable items are put in
the ashtray, hot cigarettes or
other smoking materials could
ignite them and possibly damage
the vehicle. Never put ammable
items in the ashtray.
For vehicles with a lighter, push the
lighter down and it will pop up
when it is ready to be used.
Notice:Holding a cigarette
lighter in while it is heating does
not let the lighter back away from
the heating element when it is hot.
Damage from overheating can
occur to the lighter or heating
element, or a fuse could be blown.
Do not hold a cigarette lighter in
while it is heating.
3-18 Instrument Panel

[(Floor):Air is directed to the
oor outlets, side window outlets,
and defroster. Recirculation is
not available in this mode.
/(Floor/Defog):This mode clears
the windows of fog and moisture.
Air is directed to the windshield, side
window, and oor outlets. The
system runs the air conditioning
unless the outside temperature is
near freezing or below. Recirculation
is not available in this mode.
0(Defrost):This mode clears
the windshield of fog or frost
more quickly. Air is directed to the
windshield and side window
outlets. The system runs the air
conditioning system unless
the outside temperature is near or
below freezing. Recirculation is
not available in this mode.
Do not drive the vehicle until all the
windows are clear.
#(Air Conditioning):Press to
turn the air conditioning system on
or off. An indicator light comes
on when the air conditioning
is turned on. This system cools and
dehumidies the air entering the
vehicle.
The air conditioning will not function
if the fan is turned off. If air
conditioning is selected with fan off,
the indicator light ashes three
times and then turns off.
A slight change in engine
performance may occur when the
air conditioning compressor shuts off
and turns on again. This is normal.
The system is designed to make
adjustments to help with fuel
economy while still maintaining the
selected temperature.
The air conditioning system removes
moisture from the air, so a small
amount of water might drip
under the vehicle while idling or
after turning off the engine. This is
normal.@(Recirculation):Press to turn
the recirculation mode on or off. An
indicator light comes on when the
recirculation is on. This mode
recirculates and helps to quickly cool
the air inside the vehicle. It can be
used to prevent outside air and odors
from entering the vehicle.
Recirculation is available in the
bi-level and vent modes. This mode
cannot be selected while in the oor,
oor/defog or defrost modes. If you
try to select the recirculation mode,
the indicator ashes three times
indicating it is not available in that
mode. When the recirculation mode
is turned on, the air conditioning
turns on automatically.
When it is hot enough outside, the
recirculation mode may turn on
automatically to help improve cooling
performance. The indicator light will
be lit to show this mode is active. If
the recirculation button is pressed
while in this mode, the light ashes
three times and stays on to indicate
that recirculation may not be shut off.
3-20 Instrument Panel

Warning Lights,
Gages, and Indicators
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.
3-22 Instrument Panel

Speedometer and
Odometer
The speedometer shows the speed
in both miles per hour (mph) and
kilometers per hour (km/h).
The odometer shows how far the
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 3-34for more information.
If the cluster is replaced the
new one will automatically detect
and update the vehicle’s
accumulated mileage.
Trip Odometer
The vehicle has a trip odometer that
indicates how far the vehicle has
been driven since the trip odometer
was last set to zero.
See “Trip Odometer” underDIC
Operation and Displays on
page 3-34for more information.
Tachometer
The tachometer displays the
engine speed in revolutions per
minute (rpm).
Notice:If the engine is operated
while the tachometer is in the
shaded warning area, the vehicle
could be damaged, and the
damages would not be covered
by the vehicle warranty. Do
not operate the engine with the
tachometer in the shaded
warning area.
Safety Belt Reminders
Driver Safety Belt Reminder
Light
When the engine is started, a chime
sounds for several seconds to
remind the driver to fasten their
safety belt, unless it is already
buckled.
The safety belt light comes on and
stays on for several seconds,
then ashes for several more.
This chime and light are repeated if
the driver safety belt remains
unbuckled and the vehicle is in
motion. If the driver safety belt is
already buckled, neither the
chime nor the light comes on.
3-24 Instrument Panel

Passenger Safety Belt
Reminder Light
Several seconds after the engine is
started, a chime sounds for several
seconds to remind the front
passenger to buckle their safety belt.
This only occurs if the passenger
airbag is enabled. SeePassenger
Sensing System on page 1-54for
more information. The passenger
safety belt light, located on the
instrument panel, comes on and
stays on for several seconds and
then ashes for several more.
This chime and light are repeated if
the passenger remains unbuckled
and the vehicle is in motion.If the passenger safety belt is
buckled before the engine is started,
neither the chime nor the light
comes on.
The front passenger safety belt
warning light and chime may turn on
if an object is put on the seat
such as a briefcase, handbag,
grocery bag, laptop or other
electronic device. To turn off the
warning light and or chime, remove
the object from the seat or buckle
the safety belt
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 indicates 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 1-46.
This light comes on when the
vehicle is started, and ashes for a
few seconds. The light goes out
when the system is ready.
Instrument Panel 3-25

If the airbag readiness light stays on
after the vehicle is started or
comes on while driving, the airbag
system may not work properly. Have
the vehicle serviced right away.
{CAUTION
If the airbag readiness light stays
on after the vehicle is started or
comes on while driving, it means
the airbag system might not be
working properly. The airbags in
the vehicle might not inate in a
crash, or they could even inate
without a crash. To help avoid
injury, have the vehicle serviced
right away.
The airbag readiness light should
ash for a few seconds when
the engine is started. 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 3-37for more information.
Passenger Airbag
Status Indicator
The vehicle has the passenger
sensing system. SeePassenger
Sensing System on page 1-54
for important safety information. The
instrument panel has a passenger
airbag status indicator.When the vehicle is started, the
passenger airbag status indicator
will light ON and OFF, or the symbol
for on and off, for several seconds
as a system check. Then, after
several more seconds, the status
indicator will light either ON or OFF,
or either the on or off symbol to
let you know the status of the right
front passenger frontal airbag
and seat-mounted side impact
airbag (if equipped).
If the word ON or the on symbol is
lit on the passenger airbag status
indicator, it means that the right front
passenger frontal airbag and
seat-mounted side impact airbag (if
equipped) are enabled (may
inate).
If the word OFF or the off symbol is
lit on the airbag status indicator,
it means that the passenger sensing
system has turned off the right
front passenger frontal airbag and
seat-mounted side impact airbag (if
equipped). United States
Canada
3-26 Instrument Panel

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 ever
comes on and stays on, it means
that something may be wrong with
the airbag system. To help avoid
injury to yourself or others, have
the vehicle serviced right away.
SeeAirbag Readiness Light on
page 3-25for more information,
including important safety
information.
Charging System Light
This light comes on briey when the
ignition key is turned, but the
engine is not running, as a check to
show it is working.
It should go out once the engine
starts. If it stays on, or comes
on while driving, there could be a
problem with the charging system. A
charging system message in the
Driver Information Center (DIC) may
also appear. SeeDIC Warnings
and Messages on page 3-37
for more information. This light could
indicate that there are problems
with a generator drive belt, or that
there is an electrical problem.
Have it checked right away. If the
vehicle must be driven a short
distance with the light on, turn off all
the accessories, such as the
radio and air conditioner.
Up-Shift Light
The vehicle may have an up-shift
light.
When this light comes on, shift to
the next higher gear if weather,
road, and traffic conditions allow.
SeeManual Transmission Operation
on page 2-22for more information.
Brake System Warning
Light
The vehicle’s hydraulic brake
system is divided into two parts. If
one part is not working, the
other part can still work and stop
the vehicle. For good braking
though, both parts need to be
working well.
Instrument Panel 3-27