2008 HUMMER H2 climate control

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
............................................... 1-8
Safety Belts
.............................................1-16
Child Restraints
.......................................1-36
Airbag System
.........................................1-64
Restraint System Check
............................1-76
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
......................................2-10
Windows
.................................................2-19
Theft-Deterrent Systems
............................2-24
Starting and Operating Your Vehicle
...........2-28
Mirrors
....................................................2-45
Object Detection Systems
..........................2-50
OnStar
®System
......................................2-53
Universal Home Remote System
................2-57
Storage Areas
.........................................2-64
Sunroof
..................................................2-67
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-22
Warning Lights, Gages, and Indicators
........3-31
Driver Information Center (DIC)
..................3-49
Audio System(s)
.......................................3-72Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-51
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-5
Checking Things Under the Hood
................. 5-9
Rear Axle
...............................................5-45
Four-Wheel Drive
.....................................5-46
Front Axle
...............................................5-47
Bulb Replacement
....................................5-48
Windshield Wiper Blade Replacement
.........5-54
Tires
......................................................5-55
Appearance Care
...................................5-100
Vehicle Identication
...............................5-109
Electrical System
....................................5-110
Capacities and Specications
...................5-117
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-14
Vehicle Data Recording and Privacy
...........7-16
Index................................................................ 1
2008 HUMMER H2 Owner ManualM

Remote Vehicle Start
The remote start feature allows you to start the engine
from outside of the vehicle. It may also start up the
vehicle’s heating or air conditioning systems and rear
window defogger. Normal operation of the system
will return after the key is turned to the ON/RUN
position.
During a remote start, the climate control system will
default to a heating mode during colder outside
temperatures and a cooling mode during warmer outside
temperatures.
During a remote start, the rear window defogger and
heated mirrors, if equipped, will turn on during colder
outside temperatures and will shut off when the
key is turned to ON/RUN.
During a remote start, the heated seats will turn on
during colder outside temperatures and will shut
off when the key is turned to ON/RUN. SeeHeated
Seats on page 1-4for additional information.Laws in some communities may restrict the use of
remote starters. For example, some laws may require a
person using the remote start to have the vehicle in
view when doing so. Check local regulations for
any requirements on remote starting of vehicles.
Do not use the remote start feature if your vehicle is
low on fuel. Your vehicle may run out of fuel.
The RKE transmitter with the remote start button,
provides an increased range of operation. However, the
range may be less while the vehicle is running. As a
result, you may need to be closer to your vehicle to turn
it off, than you were to turn it on.
There are other conditions which can affect the
performance of the transmitter, seeRemote Keyless
Entry (RKE) System on page 2-4for additional
information.
2-8

Liftgate (SUV)
{CAUTION:
It can be dangerous to drive with the liftgate
open because carbon monoxide (CO) gas can
come into your vehicle. You can not see or
smell CO. It can cause unconsciousness and
even death. If you must drive with the liftgate
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the liftgate:
Make sure all other windows are shut.
Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. SeeDual Automatic
Climate Control System on page 3-22.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-43.To lock and unlock the liftgate, use any of the power
door lock switches or the remote keyless entry (RKE)
transmitter.
To open the liftgate, do the following:
1. Move the spare tire carrier out of the way.
See “Opening the Spare Tire Carrier” under
Tailgate/Spare Tire Carrier on page 2-16.
2. Pull the handle located in the center of the door.
To close the liftgate, do the following:
1. Pull the liftgate down until it latches.
2. Move the spare tire carrier back into place.
See “Closing the Spare Tire Carrier” under
Tailgate/Spare Tire Carrier on page 2-16.
2-13

Midgate®(SUT)
{CAUTION:
It can be dangerous to drive with the cargo area
covered and the tailgate and the Midgate®open
because carbon monoxide (CO) gas can come
into your vehicle. You can not see or smell CO.
It can cause unconsciousness and even death.
If you must drive with the cargo covers on and
the tailgate and Midgate
®open or if electrical
wiring or other cable connections must pass
through the seal between the body and the
Midgate
®:
Make sure all windows are shut.
Turn the fan on your heating or cooling
system to its highest speed on the setting
that brings in outside air. This will force
outside air into your vehicle. SeeDual
Automatic Climate Control System on
page 3-22.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-43.The Midgate
®allows you to extend the length of your
vehicle’s cargo area into the cab.
Lowering the Midgate
The Midgate window must be completely lowered for
the Midgate®to be lowered. See “Midgate®Window”
underPower Windows on page 2-20.
Both the Midgate and the Midgate window can be
lowered while the ignition is in either ON/RUN or
ACC/ACCESSORY, or while in Retained Accessory
Power (RAP) mode. SeeRetained Accessory Power
(RAP) on page 2-29for more information.
To lower the Midgate, do the following:
1. Fold the rear seats forward. SeeSplit Folding Rear
Seat on page 1-8. The front seats may have to be
moved forward slightly.
2.
K(Midgate Window):Press the bottom part
of this switch to lower the Midgate window.
SeeInstrument Panel Overview on page 3-4for
the location of this switch. The window can also be
operated using the global express-down button.
See “Global Glass Feature” underPower Windows
on page 2-20.
2-14

Running the Engine While Parked
It is better not to park with the engine running. But if you
ever have to, here are some things to know.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust into
your vehicle. See the earlier caution under
Engine Exhaust on page 2-43.
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle
even if the climate control fan is at the highest
setting. One place this can happen is a garage.
Exhaust — with CO — can come in easily.
NEVER park in a garage with the engine
running.
Another closed-in place can be a blizzard.
SeeWinter Driving on page 4-36.
{CAUTION:
It can be dangerous to get out of your vehicle
if the shift lever is not fully in PARK (P) with
the parking brake rmly set. Your vehicle can
roll. Do not leave your vehicle when the engine
is running unless you have to. If you have left
the engine running, the vehicle can move
suddenly. You or others could be injured.
To be sure your vehicle will not move, even
when you are on fairly level ground, always set
the parking brake and move the shift lever
to PARK (P).
2-44

Outside Automatic Dimming Mirror
If the vehicle has this feature, the driver’s outside mirror
adjusts for the glare of the headlamps behind you.
SeeAutomatic Dimming Rearview Mirror with Compass
and Temperature Display on page 2-45.
Park Tilt Mirrors
The vehicle’s outside mirrors can also perform a park tilt
function. This causes the passenger’s and/or driver’s
mirror to tilt to a preselected position when the vehicle is
in REVERSE (R). This feature may be useful in
viewing the curb when parallel parking.
When the vehicle is shifted out of REVERSE (R) and a
short delay has occurred, the passenger’s and/or
driver’s mirror will return to its original position.
To change the preselected tilt position, adjust the
mirrors to the desired position while the vehicle is in
REVERSE (R). When the vehicle is shifted out of
REVERSE (R), this new position is saved in memory as
the tilt position.
This feature can be enabled/disabled through the Driver
Information Center. SeeDIC Vehicle Customization
(With DIC Buttons) on page 3-63for more information.
Outside Convex Mirror
{CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder
before changing lanes.
The passenger side mirror is convex. A convex mirror’s
surface is curved so more can be seen from the
driver seat. It also makes things, like other vehicles,
look farther away than they really are.
Outside Heated Mirrors
The vehicle may have outside heated mirrors which
help clear them of condensation, snow, and ice.
When the rear window defogger button is pressed, the
heated mirrors are also turned on. See “Rear Window
Defogger” underDual Automatic Climate Control System
on page 3-22for more information.
2-49

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-6
Horn.............................................................3-6
Tilt Wheel.....................................................3-6
Turn Signal/Multifunction Lever.........................3-7
Turn and Lane-Change Signals........................3-8
Headlamp High/Low-Beam Changer..................3-8
Flash-to-Pass.................................................3-9
Windshield Wipers..........................................3-9
Windshield Washer.......................................3-10
Rear Window Wiper/Washer...........................3-11
Cruise Control..............................................3-12
Exterior Lamps.............................................3-15
Headlamps on Reminder................................3-17
Daytime Running Lamps (DRL).......................3-17
Automatic Headlamp System..........................3-18
Instrument Panel Brightness...........................3-18
Dome Lamps...............................................3-19
Dome Lamp Override....................................3-19
Entry/Exit Lighting.........................................3-19
Reading Lamps............................................3-19
Battery Run-Down Protection..........................3-19
Accessory Power Outlet(s).............................3-20
Ashtray(s) and Cigarette Lighter......................3-21
Analog Clock...............................................3-21Climate Controls............................................3-22
Dual Automatic Climate Control System...........3-22
Outlet Adjustment.........................................3-29
Rear Air Conditioning and Heating System
and Electronic Climate Controls...................3-29
Warning Lights, Gages, and Indicators............3-31
Instrument Panel Cluster................................3-32
Speedometer and Odometer...........................3-33
Trip Odometer
..............................................3-33
Tachometer.................................................3-33
Safety Belt Reminders...................................3-33
Airbag Readiness Light..................................3-34
Airbag Off Light............................................3-35
Charging System Light..................................3-37
Voltmeter Gage............................................3-37
Brake System Warning Light..........................3-38
Antilock Brake System Warning Light...............3-39
StabiliTrak
®Indicator Light..............................3-40
Engine Coolant Temperature Gage..................3-40
Tire Pressure Light.......................................3-41
Malfunction Indicator Lamp.............................3-42
Oil Pressure Gage........................................3-45
Oil Pressure Light.........................................3-46
Security Light...............................................3-46
Cruise Control Light......................................3-46
Section 3 Instrument Panel
3-1

The main components of the instrument panel are the following:
A. Air Outlets. SeeOutlet Adjustment on page 3-29.
B. Midgate Window Switch (SUT). SeePower Windows
on page 2-20. Rear Wiper/Washer Switch (SUV).
SeeRear Window Wiper/Washer on page 3-11.
C. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 3-7.
D. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-32.
E. Audio Steering Wheel Buttons. SeeAudio Steering
Wheel Controls on page 3-116.
F. Driver Information Center (DIC) Buttons. SeeDriver
Information Center (DIC) on page 3-49.
G. Analog Clock.Analog Clock on page 3-21.
H. Airbag Switch. SeeAirbag Off Switch on page 1-72.
I. Global Window Switch. SeePower Windows
on page 2-20.
J. Exterior Lamps Control. SeeExterior Lamps
on page 3-15.
K. Dome Lamp Override Button. SeeDome Lamp
Override on page 3-19Instrument Panel Brightness
Control. SeeInstrument Panel Brightness on
page 3-18. Heated Windshield Washer Control
(If Equipped). SeeWindshield Washer on page 3-10.L. Cruise Control Buttons. SeeCruise Control
on page 3-12.
M. Tilt Lever. SeeTilt Wheel on page 3-6.
N. Horn. SeeHorn on page 3-6.
O. Full-Time Four-Wheel Drive Buttons. SeeFull-Time
Four-Wheel Drive on page 2-36.
P. Locking Rear Axle. SeeLocking Rear Axle on
page 4-6. Tow/Haul Selector Button. SeeTow/Haul
Mode on page 2-36. Traction Control (TCS) Button.
SeeTraction Control System (TCS) on page 4-5.
Ride Height Selector Button (If Equipped). See
Selectable Extended Rear Ride Height on page 4-53.
Q. Shift Lever. SeeAutomatic Transmission Operation
on page 2-32.
R. Accessory Power Outlet. SeeAccessory Power
Outlet(s) on page 3-20.
S. Climate Control System. SeeDual Automatic
Climate Control System on page 3-22.
T. Audio System. SeeAudio System(s) on page 3-72.
U. Glove Box. SeeGlove Box on page 2-64.
3-5