
2010 HUMMER H3/H3T Owner ManualM
In Brief. . . . . . . . . . . . . . . . . . . . . . . . 1-1
Instrument Panel . . . . . . . . . . . . . . 1-2
Initial Drive Information . . . . . . . . 1-3
Vehicle Features . . . . . . . . . . . . . 1-13
Performance and Maintenance . . . . . . . . . . . . . . . . 1-16
Keys, Doors and Windows . . . 2-1
Keys and Locks . . . . . . . . . . . . . . . 2-2
Doors . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Vehicle Security . . . . . . . . . . . . . . . . 2-9
Exterior Mirrors . . . . . . . . . . . . . . . 2-13
Interior Mirrors . . . . . . . . . . . . . . . . 2-14
Windows . . . . . . . . . . . . . . . . . . . . . 2-15
Roof . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Seats and Restraints . . . . . . . . . 3-1
Head Restraints . . . . . . . . . . . . . . . 3-2
Front Seats . . . . . . . . . . . . . . . . . . . . 3-3
Rear Seats . . . . . . . . . . . . . . . . . . . . 3-7
Safety Belts . . . . . . . . . . . . . . . . . . 3-10
Airbag System . . . . . . . . . . . . . . . . 3-27
Child Restraints . . . . . . . . . . . . . . 3-42 Storage
. . . . . . . . . . . . . . . . . . . . . . . 4-1
Storage Compartments . . . . . . . . 4-1
Additional Storage Features . . . 4-2
Roof Rack System . . . . . . . . . . . . . 4-4
Instruments and Controls . . . . 5-1
Controls . . . . . . . . . . . . . . . . . . . . . . . 5-2
Warning Lights, Gauges, and
Indicators . . . . . . . . . . . . . . . . . . . . 5-6
Information Displays . . . . . . . . . . 5-18
Vehicle Messages . . . . . . . . . . . . 5-21
Universal Remote System . . . . 5-26
Lighting . . . . . . . . . . . . . . . . . . . . . . . 6-1
Exterior Lighting . . . . . . . . . . . . . . . 6-1
Interior Lighting . . . . . . . . . . . . . . . . 6-7
Lighting Features . . . . . . . . . . . . . . 6-8
Infotainment System . . . . . . . . . 7-1
Introduction . . . . . . . . . . . . . . . . . . . . 7-1
Radio . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Audio Players . . . . . . . . . . . . . . . . 7-10
Phone . . . . . . . . . . . . . . . . . . . . . . . . 7-15
Climate Controls . . . . . . . . . . . . . 8-1
Climate Control Systems . . . . . . 8-1
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 8-4 Driving and Operating
. . . . . . . . 9-1
Driving Information . . . . . . . . . . . . . 9-2
Starting and Operating . . . . . . . 9-33
Engine Exhaust . . . . . . . . . . . . . . 9-40
Automatic Transmission . . . . . . 9-41
Manual Transmission . . . . . . . . . 9-44
Drive Systems . . . . . . . . . . . . . . . . 9-46
Brakes . . . . . . . . . . . . . . . . . . . . . . . 9-50
Ride Control Systems . . . . . . . . 9-52
Cruise Control . . . . . . . . . . . . . . . . 9-57
Object Detection Systems . . . . 9-60
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 9-64
Towing . . . . . . . . . . . . . . . . . . . . . . . 9-70
Conversions and Add-Ons . . . 9-81
Vehicle Care . . . . . . . . . . . . . . . . . 10-1
General Information . . . . . . . . . . 10-2
Vehicle Checks . . . . . . . . . . . . . . . 10-4
Headlamp Aiming . . . . . . . . . . . 10-33
Bulb Replacement . . . . . . . . . . 10-35
Electrical System . . . . . . . . . . . . 10-38
Wheels and Tires . . . . . . . . . . . 10-44
Jump Starting . . . . . . . . . . . . . . . 10-86
Towing . . . . . . . . . . . . . . . . . . . . . . 10-90
Appearance Care . . . . . . . . . . . 10-92

iv Introduction
{WARNING
These mean there is something
that could hurt you or other
people.
Notice: This means there is
something that could result in
property or vehicle damage.
This would not be covered by
the vehicle's warranty.
A circle with a slash through it
is a safety symbol which means
“Do Not,” “Do not do this” or
“Do not let this happen.”
Symbols
The vehicle has components and
labels that use symbols instead of
text. Symbols are shown along with the text describing the operation or
information relating to a specific
component, control, message,
gauge, or indicator.
M:
This symbol is shown when
you need to see your owner manual
for additional instructions or
information.
*: This symbol is shown when
you need to see a service manual
for additional instructions or
information.
Vehicle Symbol Chart
Here are some additional symbols
that may be found on the vehicle
and what they mean. For more
information on the symbol, refer to
the index.
9: Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
g:Audio Steering Wheel Controls
or OnStar®
$: Brake System Warning Light
":Charging System
I:Cruise Control
B: Engine Coolant Temperature
O:Exterior Lamps
#:Fog Lamps
.: Fuel Gauge
+:Fuses
i: Headlamp High/Low-Beam
Changer
j: LATCH System Child
Restraints
*: Malfunction Indicator Lamp
::Oil Pressure
}:Power
/:Remote Vehicle Start
>:Safety Belt Reminders
7:Tire Pressure Monitor
F:Traction Control/StabiliTrak
M:Windshield Washer Fluid

1-10 In Brief
Steering Wheel
Adjustment
1. Hold the steering wheel and pullthe lever towards you.
2. Move the steering wheel up or down into a comfortable position.
3. Release the lever to lock the steering wheel in place.
See Steering Wheel Adjustment
on
page 5‑2.
Interior Lighting
Dome Lamps
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.
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): The
dome lamp override button is
located below the exterior lamps
control.
Reading Lamps
Press the lens on the lamps to turn
each reading lamp on or off.
These lamps will not come on with
the dome lamps.
For more information, see:
.Dome Lamps on page 6‑7.
.Instrument Panel Illumination
Control on page 6‑7.
.Exit Lighting on page 6‑8.

Instruments and Controls 5-1
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . 5-2
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Windshield Wiper/Washer . . . . . 5-2
Rear Window Wiper/Washer . . . . . . . . . . . . . . . . . . . . . . 5-3
Compass . . . . . . . . . . . . . . . . . . . . . 5-3
Clock . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Power Outlets . . . . . . . . . . . . . . . . . 5-5
Cigarette Lighter . . . . . . . . . . . . . . 5-5
Ashtrays . . . . . . . . . . . . . . . . . . . . . . 5-6
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . 5-6
Instrument Cluster . . . . . . . . . . . . 5-7
Speedometer . . . . . . . . . . . . . . . . . 5-8
Odometer . . . . . . . . . . . . . . . . . . . . . 5-8
Trip Odometer . . . . . . . . . . . . . . . . . 5-8 Tachometer . . . . . . . . . . . . . . . . . . . 5-8
Fuel Gauge . . . . . . . . . . . . . . . . . . . 5-8
Engine Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . . 5-9
Safety Belt Reminders . . . . . . . . 5-9
Airbag Readiness Light . . . . . . 5-10
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . 5-11
Charging System Light . . . . . . . 5-11
Malfunction Indicator Lamp . . . . . . . . . . . . . 5-12
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . 5-14
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . 5-15
Up-Shift Light . . . . . . . . . . . . . . . . 5-15
Traction Control System (TCS)/StabiliTrak
®Light . . . . 5-16
Tire Pressure Light . . . . . . . . . . 5-16
Engine Oil Pressure Light . . . . 5-17
Security Light . . . . . . . . . . . . . . . . 5-17
High-Beam on Light . . . . . . . . . 5-17
Cruise Control Light . . . . . . . . . 5-18
Information Displays
Driver Information Center (DIC) . . . . . . . . . . . . . . . 5-18
Vehicle Messages
Vehicle Messages . . . . . . . . . . . 5-21
Battery Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . 5-21
Brake System Messages . . . . 5-22
Door Ajar Messages . . . . . . . . . 5-22
Engine Cooling System Messages . . . . . . . . . . . . . . . . . . 5-23
Engine Oil Messages . . . . . . . . 5-23
Engine Power Messages . . . . 5-23
Fuel System Messages . . . . . . 5-24
Lamp Messages . . . . . . . . . . . . . 5-24
Ride Control System Messages . . . . . . . . . . . . . . . . . . 5-24
Service Vehicle Messages . . . 5-25
Tire Messages . . . . . . . . . . . . . . . 5-25
Transmission Messages . . . . . 5-25
Universal Remote System
Universal Remote System . . . 5-26
Universal Remote System Programming . . . . . . . . . . . . . . . 5-26
Universal Remote System Operation . . . . . . . . . . . . . . . . . . 5-30

5-14 Instruments and Controls
Emissions Inspection and
Maintenance Programs
Some state/provincial and local
governments have or might begin
programs to inspect the emission
control equipment on the vehicle.
Failure to pass this inspection
could prevent getting a vehicle
registration.
Here are some things to know to
help the vehicle pass an inspection:
.The vehicle will not pass this
inspection if the check engine
light is on with the engine
running, or if the key is in
ON/RUN and the light is not on.
.The vehicle will not pass
this inspection if the OBD II
(on-board diagnostic) system
determines that critical emission
control systems have not been
completely diagnosed by the
system. The vehicle would
be considered not ready for
inspection. This can happen ifthe battery has recently been
replaced or if the battery has run
down. The diagnostic system is
designed to evaluate critical
emission control systems during
normal driving. This can take
several days of routine driving.
If this has been done and the
vehicle still does not pass the
inspection for lack of OBD II
system readiness, your dealer
can prepare the vehicle for
inspection.
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.
If the warning light comes on, there
could be a brake problem. Have the
brake system inspected right away.
United StatesCanada
This light comes on briefly when the
ignition key is turned to ON/RUN.
If it does not, have it fixed so it will
be ready to warn if there is a
problem.
When the ignition is on, the brake
system warning light comes on
when the parking brake is set.
See Parking Brake
on page 9‑51for more information. The light stays
on if the parking brake does not
release fully. If it stays on after the
parking brake is fully released, it
means there is a brake problem.

Instruments and Controls 5-15
If the light comes on while driving,
pull off the road and stop. The brake
pedal might be harder to push, or it
might go closer to the floor. It can
take longer to stop. If the light is
still on, have the vehicle towed for
service. SeeTowing the Vehicle
on
page 10‑90.
{WARNING
The brake system might not be
working properly if the brake
system warning light is on.
Driving with the brake system
warning light on can lead to a
crash. If the light is still on after
the vehicle has been pulled off
the road and carefully stopped,
have the vehicle towed for
service.
Antilock Brake System
(ABS) Warning Light
For vehicles with the Antilock Brake
System (ABS), this light comes on
briefly when the engine is started.
If it does not, have the vehicle
serviced by your dealer. If the
system is working normally the
indicator light will then go off.
If the ABS light stays on, turn the
ignition off. If the light comes on
while driving, stop as soon as it is
safely possible and turn the ignition
off. Then start the engine again to
reset the system. If the ABS light
stays on, or comes on again while
driving, the vehicle needs service.
If the regular brake system warning
light is not on, the vehicle still has
brakes, but not antilock brakes. If the regular brake system warning
light is also on, the vehicle does not
have antilock brakes and there is a
problem with the regular brakes.
See
Brake System Warning Light
on page 5‑14.
For vehicles with a Driver
Information Center (DIC), see
Brake System Messages
on
page 5‑22for more information.
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.
See Manual Transmission
on
page 9‑44for more information.

5-22 Instruments and Controls
The vehicle is safe to drive,
however have the electrical system
checked by your dealer. Press
and release the reset stem to
acknowledge the message and
clear it from the display.
Brake System Messages
ABS (Antilock Brake System)
FAULT
This message displays if there is a
problem with the Antilock Brake
System (ABS). Check the ABS as
soon as possible and have the
vehicle serviced by your dealer.
SeeAntilock Brake System (ABS)
on page 9‑50andAntilock Brake
System (ABS) Warning Lighton
page 5‑15for more information.
Press and release the reset stem
to acknowledge the message and
clear it from the display.
BRAKES
This message displays if there is a
problem with the brakes. Check the
brakes as soon as possible and
have the vehicle serviced by your
dealer. See Brakes
on page 10‑26andBrake System Warning Lighton
page 5‑14for more information.
Press and release the reset stem
to acknowledge the message and
clear it from the display.
FLUID
This message displays if the brake
fluid is low. Check the brake fluid
as soon as possible and have the
vehicle serviced by your dealer.
See Brake Fluid
on page 10‑27for
more information. Press and release
the reset stem to acknowledge the
message and clear it from the
display.
HSA (Hill Start Assist) ON
This message displays when the
Hill Start Assist is enabled. See Hill
Start Assist (HSA)
on page 9‑52for
more information.
PARK BRK (Brake)
This message displays when the
parking brake is set. See Parking
Brake
on page 9‑51and Brake
System Warning Lighton
page 5‑14for more information.
The message clears from the
display after the parking brake is
released or by pressing and
releasing the reset stem.
Door Ajar Messages
DOORS
This message displays when one or
more of the doors is ajar. Check all
the doors on the vehicle to make
sure they are closed. The message
clears from the display after all of
the doors are closed.

Lighting 6-7
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.Interior Lighting
Instrument Panel
Illumination Control
The instrument panel brightness
thumbwheel is 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. 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 Lamps
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.
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).