2009 HUMMER H2 four wheel drive

The main components of the instrument panel are the following:
A.Outlet Adjustment on page 3-27.
B. Midgate Window Switch (SUT). SeePower Windows
on page 2-20.Rear Window Wiper/Washer on
page 3-11(SUV).
C.Turn Signal/Multifunction Lever on page 3-8.
D.Instrument Panel Cluster on page 3-30.
E.Audio Steering Wheel Controls on page 3-129.
F.Driver Information Center (DIC) on page 3-46.
G.Analog Clock on page 3-21.
H.Airbag Off Switch on page 1-76.
I. Global Window Switch. SeePower Windows on
page 2-20.
J.Exterior Lamps on page 3-15.
K.Dome Lamp Override on page 3-18.Instrument
Panel Brightness on page 3-17. Heated Windshield
Washer Control (If Equipped). SeeWindshield
Washer on page 3-10.L.Cruise Control on page 3-12.Heated Steering Wheel
on page 3-7(If Equipped).
M.Tilt Wheel on page 3-6.
N.Horn on page 3-6.
O.Full-Time Four-Wheel Drive on page 2-37.
P.Locking Rear Axle on page 4-10.Tow/Haul Mode
on page 2-36.Traction Control System (TCS) on
page 4-9. Ride Height Selector Button (If Equipped).
SeeSelectable Extended Rear Ride Height on
page 4-52.
Q. Shift Lever. SeeAutomatic Transmission Operation
on page 2-32.
R.Accessory Power Outlet(s) on page 3-20.
S.Dual Automatic Climate Control System on
page 3-22.
T.Audio System(s) on page 3-72.
U.Glove Box on page 2-64.
3-5

RIGHT REAR DOOR OPEN
This message displays and a chime sounds if the
passenger side rear door is not fully closed and the
vehicle is shifted out of P (Park). 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.
SERVICE 4 WHEEL DRIVE
(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/retailer for service.
SERVICE AIR BAG
This message displays if there is a problem with
the airbag system. Have your dealer/retailer inspect
the system for problems. SeeAirbag Readiness Light
on page 3-32andAirbag System on page 1-67for more
information.
SERVICE BATTERY CHARGING
SYSTEM
On some vehicles, this message displays if there is a
problem with the battery charging system. Under certain
conditions, the charging system light may also turn on in
the instrument panel cluster. SeeCharging System Light
on page 3-35. Driving with this problem could drain the
battery. Turn off all unnecessary accessories. Have the
electrical system checked as soon as possible. See your
dealer/retailer.
SERVICE BRAKE SYSTEM
This message displays along with the brake system
warning light if there is a problem with the brake system.
SeeBrake System Warning Light on page 3-37. 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,
the brake system needs service as soon as possible.
See your dealer/retailer.
3-60

The StabiliTrak disable
button is located on the
instrument panel below the
climate controls.
The traction control part of StabiliTrak can be turned off
by pressing and releasing the StabiliTrak button if both
systems (traction control and StabiliTrak) were previously
on. To disable both traction control and StabiliTrak, press
and hold the button until STABILITRAK OFF is displayed
on the DIC and the StabiliTrak light comes on the
instrument panel.
Traction control and StabiliTrak can be turned on by
pressing and releasing the StabiliTrak button if not
automatically shut off for any other reason.
When the traction control or StabiliTrak system is turned
off, the StabiliTrak light and the appropriate traction
control off or StabiliTrak off message will be displayed on
the DIC to warn the driver. The vehicle will still havebrake-traction control when traction control is off, but will
not be able to use the engine speed management
system. See “Traction Control Operation” next for more
information.
When the traction control system has been turned off,
there may be system noises as a result of the
brake-traction control coming on.
It is recommended to leave the system on for normal
driving conditions, but it may be necessary to turn
the system off if the vehicle is stuck in sand, mud, ice or
snow, and you want to “rock” the vehicle to attempt to
free it. It may also be necessary to turn off the
system when driving in extreme off-road conditions
where high wheel spin is required. SeeIf Your Vehicle
is Stuck in Sand, Mud, Ice, or Snow on page 4-39.
When the transfer case is in Four-Wheel-Low Lock, the
stability system is automatically disabled, the StabiliTrak
light will come on and the STABILITRAK OFF message
will appear on the DIC. Both traction control and
StabiliTrak are automatically disabled in this condition.
4-7

To turn the system off,
press and release the
TCS button.
This light will come on
steady when the traction
control system has been
turned off. This light ashes
when TCS is active.
If the TCS button is pressed, the traction control system
will turn off and a TRACTION CONTROL OFF message
will appear on the DIC. Press the TCS button again to
turn the system back on. The TRACTION CONTROL
OFF message will then go off. The Traction Control
System will reset itself at each ignition cycle.
Adding non-dealer/non-retailer accessories can affect
the vehicle’s performance. SeeAccessories and
Modifications on page 5-3.Locking Rear Axle
The locking rear axle can give the vehicle additional
traction from the rear wheels when traveling in off-road
situations such as mud, snow, sand, steep hills and
uneven terrain.
The button used to turn
this feature on or off is
located below the transfer
case dial to the right of
the steering wheel.
To lock the rear axle:
1. Place the transfer case in the Four-Wheel-Low Lock
mode. This is the only mode which will allow the rear
axle to lock. SeeFull-Time Four-Wheel Drive on
page 2-37for more information regarding the transfer
case and Four-Wheel-Low-Lock mode.
2. Press the button with the vehicle stopped or moving
less than 2 mph (3 km/h).
4-10

The light in the button must stop ashing and remain
illuminated before the rear axle is locked.
Notice:If you try to lock the axle while the vehicle
is stuck and the tires are spinning, the vehicle’s
drivetrain could be damaged. The repairs would not
be covered by the vehicle warranty. Always lock
the axle before attempting situations and/or
navigating terrain which could possibly cause the
vehicle to become stuck.
The locking rear axle will be disengaged when the
vehicle’s speed is greater than 40 mph (64 km/h), if the
vehicle’s battery is low and/or the transfer case is
shifted out of Four-Wheel-Low-Lock mode.
Notice:If the vehicle’s axle is locked while driving
on pavement, the drivetrain could be damaged.
Repairs would not be covered by the vehicle
warranty. Do not use the locking axle on pavement.
If four-wheel drive is needed when traveling on
pavement, use only 4HI.Steering
Power Steering
If power steering assist is lost because the engine stops
or the system is not functioning, the vehicle can be
steered but it will take more effort.
Steering Tips
It is important to take curves at a reasonable speed.
Traction in a curve depends on the condition of the tires
and the road surface, the angle at which the curve is
banked, and vehicle speed. While in a curve, speed is
the one factor that can be controlled.
If there is a need to reduce speed, do it before entering
the curve, while the front wheels are straight.
Try to adjust the speed so you can drive through the
curve. Maintain a reasonable, steady speed. Wait
to accelerate until out of the curve, and then accelerate
gently into the straightaway.
4-11

Off-Road Driving
The airbag system is designed to work properly under a
wide range of conditions, including off-road usage.
Always wear your safety belt and observe safe driving
speeds, especially on rough terrain.
Drinking and driving can be very dangerous on any road
and this is certainly true for off-road driving. At the very
time you need special alertness and driving skills, your
reexes, perceptions, and judgment can be affected
by even a small amount of alcohol. You could have a
serious — or even fatal — accident if you drink and drive
or ride with a driver who has been drinking.
Off-roading can be great fun but has some denite
hazards. The greatest of these is the terrain itself. When
off-road driving, traffic lanes are not marked, curves
are not banked, and there are no road signs. Surfaces
can be slippery, rough, uphill, or downhill.
Avoid sharp turns and abrupt maneuvers. Failure to
operate the vehicle correctly off-road could result in loss
of vehicle control or vehicle rollover.
Off-roading involves some new skills. That is why it is
very important that you read these driving tips and
suggestions to help make off-road driving safer
and more enjoyable.
Before You Go Off-Roading
Have all necessary maintenance and service
work done.
Make sure there is enough fuel, that uid levels are
where they should be, and that the spare tire is fully
inated.
Be sure to read all the information about
four-wheel-drive vehicles in this manual.
Make sure any equipment you may need — rst aid
kit, cell phone, ashlight, etc. — is securely stored
in the vehicle.
Remove any removable side steps. SeeAssist
Steps on page 4-33.
Make sure all underbody shields, if the vehicle has
them, are properly attached.
Know the local laws that apply to off-roading where
you will be driving or check with law enforcement
people in the area.
Be sure to get the necessary permission if you will
be on private land.
4-15

Dinghy Towing
This full-time four-wheel-drive vehicle can be dinghy
towed from the front. These vehicles can also be towed
by placing them on a platform trailer with all four wheels
off the ground. These vehicles cannot be towed using
a dolly.
Use the following procedure to tow the vehicle:
1. Shift the transmission to P (Park).
2. Turn the engine off, but leave the ignition in
ACC/ACCESSORY.
3. Firmly set the parking brake.
4. Securely attach the vehicle being towed to the tow
vehicle.
{CAUTION:
Shifting a full-time four-wheel-drive vehicle’s
transfer case into N (Neutral) can cause the vehicle
to roll even if the transmission is in P (Park). The
driver or others could be injured. Make sure the
parking brake is rmly set before the transfer case
is shifted to N (Neutral).
5. Shift the transfer case to N (Neutral). SeeFull-Time
Four-Wheel Drive on page 2-37for the proper
procedure to select the N (Neutral) position for the
vehicle.
6. Release the parking brake only after the vehicle
being towed is rmly attached to the towing
vehicle.
7. Turn the ignition to ACC/ACCESSORY.
8. Disconnect the battery if the vehicle will be towed
for long distances or long periods of time.
When towing the vehicle for extended periods of time,
start the vehicle as often as possible to prevent
battery drain. This should only be done when the tow
vehicle is parked.
4-51

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-4
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of
the Vehicle.................................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-6
Additives.......................................................5-6
Fuel E85 (85% Ethanol)..................................5-7
Fuels in Foreign Countries...............................5-8
Filling the Tank..............................................5-8
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-11
Hood Release..............................................5-12
Engine Compartment Overview.......................5-14
Engine Oil...................................................5-15
Engine Oil Life System..................................5-18
Engine Air Cleaner/Filter................................5-20
Automatic Transmission Fluid.........................5-23
Cooling System............................................5-27
Engine Coolant.............................................5-31
Engine Overheating.......................................5-33Overheated Engine Protection
Operating Mode.........................................5-35
Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-37
Brakes........................................................5-38
Battery........................................................5-41
Jump Starting...............................................5-42
Rear Axle.......................................................5-47
Four-Wheel Drive............................................5-48
Front Axle......................................................5-49
Bulb Replacement..........................................5-50
Halogen Bulbs..............................................5-50
Headlamps..................................................5-51
Front Turn Signal and Parking Lamps..............5-52
Daytime Running Lamps (DRL).......................5-52
Roof Marker Lamps......................................5-53
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps.........................................5-54
Replacement Bulbs.......................................5-55
Windshield Wiper Blade Replacement..............5-56
Tires..............................................................5-57
Tire Sidewall Labeling...................................5-58
Tire Terminology and Denitions.....................5-60
Ination - Tire Pressure.................................5-63
Tire Pressure Monitor System.........................5-64
Section 5 Service and Appearance Care
5-1