2007 HUMMER H2 service

At approximately 265°F (130°C), the Driver
Information Center (DIC) will display a
TRANSMISSION HOT message and the
transmission will enter a transmission protection
mode. When the transmission enters the protection
mode, you may notice a change in the transmission
shifting patterns. The transmission will return to
normal shifting patterns when the transmission uid
temperature falls below 260°F (125°C).
If the transmission uid reaches temperatures of
approximately 275°F (135°C) or greater, the DIC
will display a TRANS HOT IDLE ENGINE warning
message and a chime will sound. Pull the vehicle
off the roadway when it is safe to do so. Set the
parking brake, place the transmission in PARK (P)
and allow the engine to idle until the transmission
temperature falls below 260°F (125°C). If the
transmission continues to operate above 265°F
(130°C), please contact your nearest dealer or the
GM Roadside Assistance Center.
SeeDriver Information Center (DIC) on page 222
for further information.Notice:If you drive your vehicle with the
transmission temperature gage above normal
operating range, you can damage the
transmission. This could lead to costly repairs
that would not be covered by your warranty.
Do not drive your vehicle while the
transmission temperature gage reading is
above normal. See your dealer for service.
The following situations can cause the
transmission to operate at higher temperatures:
Towing a trailer,
hot outside air temperatures,
hauling a large or heavy load,
low transmission uid level,
high transmission uid level,
restricted air ow to the radiator.
A temporary solution to hotter transmission
operating temperatures may be to let the
transmission cool down. If the transmission is
operated at higher temperatures on a frequent
basis, seeScheduled Maintenance on page 517
for the proper transmission maintenance intervals.
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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 392.
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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.
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A reading in the low pressure zone may be
caused by a dangerously low oil level or some
other problem causing low oil pressure. Check
your oil as soon as possible. SeeEngine Oil on
page 404.
{CAUTION:
Do not keep driving if the oil pressure is
low. If you do, your engine can become so
hot that it catches re. You or others could
be burned. Check your oil as soon as
possible and have your vehicle serviced.
Notice:Lack of proper engine oil maintenance
may damage the engine. The repairs would
not be covered by your warranty. Always follow
the maintenance schedule in this manual for
changing engine oil.
Security Light
This light will come on
briey when you turn
the key toward START.
The light will stay on
until the engine starts.
If the light ashes, the Passlock
®system has
entered a tamper mode. If the vehicle fails to start,
seePasslock
®on page 118.
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 116for
additional information regarding the security light.
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LEFT REAR DOOR AJAR
This message displays and a chime sounds if the
driver’s side rear door is not fully closed and
the vehicle is in a drive gear. Stop and turn off the
vehicle, check the door for obstructions, and
close the door again. Check to see if the message
still appears on the DIC. Press any of the DIC
buttons, or the trip stem, to acknowledge
this message and clear it from the DIC display.
OIL LIFE RESET
This message displays for about 10 seconds after
resetting the change engine oil message. See
Engine Oil on page 404and “Engine Oil Life
System” underDIC Operation and Displays on
page 222for more information.
OIL PRESSURE LOW
This message displays and a chime sounds 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.
PASSENGER DOOR AJAR
This message displays and a chime sounds if the
passenger’s door is not fully closed and the
vehicle is in a drive gear. Stop and turn off the
vehicle, check the door for obstructions, and close
the door again. Check to see if the message
still appears on the DIC. Press any of the
DIC buttons, or the trip stem, to acknowledge this
message and clear it from the DIC display.
REAR ACCESS OPEN
On the SUV, this message displays and a chime
sounds if the liftgate is open while the ignition
is in RUN. Turn off the vehicle and check
the liftgate. Restart the vehicle and check for the
message on the DIC display.
On the SUT, this message displays if the midgate
is open or one or both of the midgate latches
are not fully closed. Turn off the vehicle and check
that the midgate and the latches are closed.
Restart the vehicle and check for the message on
the DIC display.
Press any of the DIC buttons, or the trip stem, to
acknowledge this message and clear it from
the DIC display.
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REDUCED ENGINE POWER
This message displays when the cooling system
temperature gets too hot and the engine further
enters the engine coolant protection mode.
SeeEngine Overheating on page 418for further
information.
This message may also display when the vehicle
determines that there is a problem with the
electronic throttle control. See your dealer
for service.
This message also 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.
REPLACE LIFTGATE FUSE (SUV)
This message displays if the liftgate lock
malfunctions and/or the liftgate fuse blows. For
more information on fuses, seeInstrument Panel
Fuse Block on page 504andUnderhood Fuse
Block on page 507.
If the message returns after replacing the fuse,
see your dealer for service.
RIGHT REAR DOOR AJAR
This message displays and a chime sounds if the
passenger’s side rear door is not fully closed
and the vehicle is in a drive gear. Stop and turn
off the vehicle, check the door for obstructions, and
close the door again. Check to see if the
message still appears on the DIC. Press any of
the DIC buttons, or the trip stem, to acknowledge
this message and clear it from the DIC display.
230

SERVICE 4WD (Full-Time
Four-Wheel Drive)
This message displays if a problem occurs with
the Full-Time Four-Wheel Drive system.
If this message appears, stop as soon as possible
and turn off the vehicle. Restart the vehicle and
check for the message on the DIC display. If
the message is still displayed, or appears again
when you begin driving, there is a problem with the
Full-Time Four-Wheel Drive system. See your
dealer for service. Press any of the DIC buttons,
or the trip stem, to acknowledge this message and
clear it from the DIC display.
SERVICE AIR BAG
This message displays if there is a problem with
the airbag system. Have your dealer inspect
the system for problems. Press any of the DIC
buttons, or the trip stem, to acknowledge this
message and clear it from the DIC display. See
Airbag Readiness Light on page 207and
Airbag System on page 77for more information.
SERVICE AIR SUSPENSION
This message displays if a problem occurs with
the suspension system. If this message appears,
stop as soon as possible and turn off the
vehicle. Restart the vehicle and check for the
message on the DIC display. If the message is still
displayed, or appears again when you begin
driving, there is a problem with the air suspension
system. See your dealer for service.
SERVICE BRAKE SYSTEM
This message displays if a problem occurs with
the brake system. If this message appears, stop as
soon as possible and turn off the vehicle. Restart
the vehicle and check for the message on the
DIC display. If the message is still displayed, or
appears again when you begin driving, there
is a problem with the brake system. See your
dealer for service. Press any of the DIC buttons,
or the trip stem, to acknowledge this message and
clear it from the DIC display.
231

This system relies upon receiving specic
information from these stations and only works
when the information is available. In rare cases, a
radio station can broadcast incorrect information
that causes the radio features to work improperly.
If this happens, contact the radio station.
While the radio is tuned to an RDS station, the
station name or call letters display instead of the
frequency. RDS stations can also provide the
time of day, a program type (PTY) for current
programming, and the name of the program being
broadcast.
XM™ Satellite Radio Service
XM™ is a satellite radio service that is based in
the 48 contiguous United States and Canada.
XM™ offers a large variety of coast-to-coast
channels including music, news, sports, talk,
traffic/weather (U.S. subscribers), and children’s
programming. XM™ provides digital quality
audio and text information that includes song title
and artist name. A service fee is required in
order to receive the XM™ service. For more
information, contact XM™; In the U.S. at
www.xmradio.com or call 1-800-852-XMXM (9696)
or in Canada at www.xmradio.ca or call
1-877-GET-XMSR (438-9677).
Playing the Radio
PWR (Power):Press this knob to turn the system
on and off.
oVOLp(Volume):Turn this knob clockwise or
counterclockwise to increase or to decrease the
volume.
INFO (Information):When the ignition is off,
press this knob to display the time.
For RDS, press the INFO knob to change what
appears on the display while using RDS. The
display options are station name, RDS station
frequency, PTY (program type), and the name of
the program (if available).
For XM™ (if equipped), press the INFO knob
while in XM™ mode to retrieve four different
categories of information related to the current
song or channel: Artist, Song Title, Category
or PTY, Channel Number/Channel Name.
To change the default on the display, press the
INFO knob until you see the desired display, then
press and hold the knob until a beep sounds.
The selected display is now the default.
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