ignition HUMMER H3 2007 Service Manual

Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation
of the fuel, ignition,
and emission control
systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to assure that emissions are at acceptable
levels for the life of the vehicle, helping to produce
a cleaner environment. The check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will be
indicated by the system before any problem is
apparent. This may prevent more serious damage
to your vehicle. This system is also designed to
assist your service technician in correctly
diagnosing any malfunction.Notice:If you keep driving your vehicle with
this light on, after awhile, your emission
controls may not work as well, your fuel
economy may not be as good, and your engine
may not run as smoothly. This could lead to
costly repairs that may 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 may
cause this light to come on. Modications to
these systems could lead to costly repairs
not covered by your warranty. This may also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 314.
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This light should come on, as a check to show
you it is working, when the ignition is on and
the engine is not running. If the light does
not come on, have it repaired. This light will also
come on during a malfunction in one of two ways:
Light Flashing— A misre condition has been
detected. A misre increases vehicle emissions
and may damage the emission control system
on your vehicle. Diagnosis and service may
be required.
Light On Steady— An emission control system
malfunction has been detected on your vehicle.
Diagnosis and service may be required.
If the Light is Flashing
The following may prevent more serious damage
to your vehicle:
Reducing vehicle speed
Avoiding hard accelerations
Avoiding 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 stops ashing and remains on steady,
see “If the Light Is On Steady” following.If the light continues to ash, when it is safe to
do so, stop the vehicle. Find a safe place to park
your vehicle. Turn the key off, wait at least
10 seconds and restart the engine. If the light
remains on steady, see “If the Light Is On Steady”
following. If the light is still ashing, follow the
previous steps, and see your dealer for service
as soon as possible.
If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully
install the cap. SeeFilling the Tank on page 318.
The diagnostic system can determine if the fuel cap
has been left off or improperly installed. A loose
or missing fuel cap will allow fuel to evaporate into
the atmosphere. A few driving trips with the cap
properly installed should turn the light off.
Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The
condition will usually be corrected when the
electrical system dries out. A few driving trips
should turn the light off.
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Security Light
This light will come on
briey when you turn
the key to START.
The light will stay on
until the engine starts.
If the ignition is turned on, and the light ashes,
the Passlock
®system has entered a tamper
mode. If the vehicle fails to start, seePasslock®
on page 100.
If the ignition is turned on, but the engine is not
running, the light should be on solid.
If the light comes on continuously while driving
and stays on, there may be a problem with
the Passlock
®system. Your vehicle will not be
protected by Passlock®, and you should see
your dealer.
Also, seeContent Theft-Deterrent on page 98for
additional information regarding the security light.
Cruise Control Light
This light comes on
whenever you set the
cruise control.
The light goes out when the cruise control is
turned off. SeeCruise Control on page 159for
more information.
Highbeam On Light
This light comes
on whenever
the high-beam
headlamps are on.
SeeHeadlamp High/Low-Beam Changer
on page 157for more information.
190

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 196for more information.
United StatesCanada
191

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 Controls and Displays
The Driver Information Center (DIC) comes on
when the ignition is on.
If a problem is detected, a warning message will
appear on the display. Pressing and releasing
the trip odometer reset stem on the DIC will
acknowledge some current warnings or service
messages. Some messages will 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.
Trip Information
Odometer
The odometer is automatically displayed on the
DIC when you start the vehicle. The odometer
shows the total distance the vehicle has
been driven in either miles for the United States
or kilometers for Canada.
Trip Odometer
Press and release the reset stem until TRIP
appears on the DIC display. The trip odometer
shows the current distance traveled since the
last reset of the trip odometer in either miles for
the United States or kilometers for Canada.
Press and hold the reset stem for about
four seconds to reset the trip odometer.
192

Engine Oil Life System
With the engine off, turn the key to ON and then
press the reset stem until OIL LIFE RESET
appears — alternating between OIL LIFE and
RESET — on the DIC display. The CHANGE OIL
message will alert you to change your oil on a
schedule consistent with your driving conditions.
Always reset the OIL LIFE message after an
oil change. To reset the message, seeEngine
Oil Life System on page 326.
In addition to the engine oil life system monitoring
the oil life, additional maintenance is recommended
in the Maintenance Schedule in this manual.
SeeEngine Oil on page 323andScheduled
Maintenance on page 429for more information.
Language
This feature allows you to choose the language in
which the DIC display will show information.
To set your choice for this feature, perform the
following steps:
1. With the engine off, turn the key to ON.
2. Close all doors and make sure that the
DOORS message is not displayed in the DIC.3. Press and release the reset stem until the
language is shown on the DIC display.
4. To view the next available language,
press and hold the reset stem for about
two seconds. Release the reset stem and
press and hold again to view each language.
You can choose from English (default),
Spanish, or French.
5. Once the desired language is shown on the
DIC display, briey press the reset stem to
set your choice.
Automatic Door Locks
This feature allows you to program your door
locks to a preferred setting.
To set your choice for this feature, perform the
following steps:
1. With the engine off, turn the key to LOCK.
Do not remove the key from the ignition.
2. Press and hold the power door lock button for
about three seconds until the DIC display
shows the current door lock mode.
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3. To view the next available mode, press and
hold the reset stem for about two seconds.
Release the reset stem and press and
hold again to view each mode.
4. Once the desired mode is shown on the DIC
display, briey press the reset stem to set
your choice. The DIC display will then clear.
The following are the available modes:
Lock 1 (default):On vehicles with an automatic
transmission, this mode locks all of the doors
when the vehicle is shifted out of PARK (P) and
unlocks all of the doors when the vehicle is shifted
into PARK (P).
On vehicles with a manual transmission, this
mode locks all of the doors when the vehicle
speed is greater than 15 mph (24 km/h) and
unlocks all of the doors when the key is removed
from the ignition.Lock 2:On vehicles with an automatic
transmission, this mode locks all of the doors
when the vehicle is shifted out of PARK (P) and
unlocks the driver’s door when the vehicle is
shifted into PARK (P).
On vehicles with a manual transmission, this
mode locks all of the doors when the vehicle
speed is greater than 15 mph (24 km/h) and
unlocks the driver’s door when the key is removed
from the ignition.
Lock 3:On vehicles with an automatic
transmission, this mode locks all of the doors
when the vehicle is shifted out of PARK (P).
The doors will not automatically unlock.
On vehicles with a manual transmission, this
mode locks all of the doors when the vehicle
speed is greater than 15 mph (24 km/h).
The doors will not automatically unlock.
194

Remote Keyless Entry (RKE) Feedback
This feature allows you to program your Remote
Keyless Entry (RKE) feedback to a preferred
setting.
To set your choice for this feature, perform the
following steps:
1. With the engine off, turn the key to LOCK.
Do not remove the key from the ignition.
2. Press and hold the lock and unlock buttons
on the RKE transmitter at the same time.
Hold both buttons until the DIC display shows
the current RKE feedback mode.
3. To view the next available mode, press and
hold the reset stem for about two seconds.
Release the reset stem and press and
hold again to view each mode.
4. Once the desired mode is shown on the DIC
display, briey press the reset stem to set
your choice. The DIC display will then clear.The following are the available modes:
RFA 1 (default):This mode ashes the parking
lamps when you press the lock or unlock
buttons on the RKE transmitter.
RFA 2:This mode ashes the parking lamps and
sounds the horn when you press the lock button
on the RKE transmitter. This mode also ashes the
parking lamps when you press the unlock button
on the RKE transmitter.
RFA 3:This mode ashes the parking lamps
and sounds the horn when you press the lock or
unlock buttons on the RKE transmitter.
RFA 4:This mode disables RKE feedback. There
will be no feedback when you press the lock or
unlock buttons on the RKE transmitter.
195

FUEL CAP
This message displays if the vehicle’s fuel cap is
either off or loose. Pull over as soon as possible
and check to see if the fuel cap is secure. You may
also see the check engine light on the instrument
panel cluster. If the check engine light does
come on when the fuel cap was loose, it may take
a few driving trips before the light turns off. See
Malfunction Indicator Lamp on page 186for more
information if the light still remains on. Press
and release the reset stem to acknowledge the
message and clear it from the display.
LOW FUEL
This message displays if the level of fuel in the
vehicle is low. Also check the fuel gage. See
Fuel Gage on page 191for more information.
Rell the fuel tank as soon as possible.
LOW TIRE
This message displays if a low tire pressure is
detected in any of the vehicle’s tires. Press
and release the reset stem to acknowledge the
message and clear it from the display. The
message appears at each ignition cycle until the
tires are inated to the correct ination pressure.
SeeTires on page 367andInation - Tire
Pressure on page 375for more information on
tires and the correct ination pressures.
OIL
This message displays when the oil pressure is
low. SeeOil Pressure Light on page 189and
Engine Oil on page 323for more information.
PARK BRK (Brake)
This message displays when the parking brake
is set. SeeParking Brake on page 116and
Brake System Warning Light on page 182for
more information. The message clears from the
display after the parking brake is released or
by pressing and releasing the reset stem.
198

REDUCED POWER
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 while this message is on, but
acceleration and speed may be reduced. Anytime
this message stays on, the vehicle should be taken
to your dealer for service as soon as possible.
Press and release the reset stem to acknowledge
the message and clear it from the display.
SERV (Service) 4WD
(Four-Wheel Drive)
This message displays when there is a problem
with the transfer case control system. Check
the transfer case on your vehicle and have
it serviced by your dealer. SeeFull-Time
Four-Wheel Drive on page 111for more
information about the transfer case. Press and
release the reset stem to acknowledge the
message and clear it from the display.
SERV (Service) TPM
(Tire Pressure Monitor)
This message displays if any of the tire monitor
sensors have malfunctioned, if the tire monitor
sensors have not been programmed, or if
the recommended tire pressures are not
programmed. The tire pressure light also ashes
for one minute and then turns on solid until
the condition goes away or the system is serviced.
SeeTire Pressure Light on page 185. Press
and release the reset stem to acknowledge the
message and clear it from the display. This
message appears at each ignition cycle until the
system is serviced. See your dealer for service.
SeeTire Pressure Monitor System on page 376
for more information.
SERV (Service) VEH (Vehicle)
This message displays if your vehicle needs
service. Have your vehicle serviced by your dealer
as soon as possible.
199