Page 1 of 382

Seats and Restraint
System............................... 1-1
Head Restraints
.............. 1-2
Front Seats
.................... 1-3
Rear Seats
.................... 1-7
Safety Belts
..................1-11
Child Restraints
.............1-25
Airbag System
..............1-46
Restraint System
Check
......................1-60
Features and Controls...... 2-1
Keys
............................. 2-2
Doors and Locks
............ 2-5
Windows
........................ 2-9
Theft-Deterrent
Systems
...................2-11
Starting and Operating Your
Vehicle
.....................2-15
Mirrors
.........................2-33
Object Detection
Systems
...................2-36
OnStar
®System
............2-39Universal Home
Remote System
.........2-42
Storage Areas
...............2-47
Sunroof
........................2-50
Instrument Panel............... 3-1
Instrument Panel
Overview
.................... 3-4
Climate Controls
............3-19
Warning Lights, Gages,
and Indicators
............3-22
Driver Information
Center (DIC)
.............3-34
Audio System(s)
............3-41
Driving Your Vehicle......... 4-1
Your Driving, the Road,
and the Vehicle
........... 4-1
Towing
........................4-40
Service and
Appearance Care............... 5-1
Service
.......................... 5-3
Fuel
.............................. 5-5
Checking Things Under
the Hood
.................... 5-9
Rear Axle
.....................5-38Four-Wheel Drive
..........5-38
Front Axle
....................5-39
Headlamp Aiming
..........5-39
Bulb Replacement
.........5-41
Windshield Wiper Blade
Replacement
.............5-44
Tires
...........................5-44
Appearance Care
..........5-83
Vehicle Identi cation
......5-90
Electrical System
...........5-91
Capacities and
Speci cations
............5-96
Maintenance Schedule...... 6-1
Maintenance Schedule
..... 6-1
Customer Assistance
Information........................ 7-1
Customer Assistance and
Information
................. 7-1
Reporting Safety
Defects
.....................7-14
Vehicle Data Recording
and Privacy
...............7-16
Index....................................i-1
2009 HUMMER H3/H3T Owner ManualM
Page 4 of 382
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 Gage
+: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
M:Windshield Washer Fluid
iv Preface
Page 6 of 382
Head Restraints
The front seats have adjustable
head restraints in the outboard
seating positions.
{CAUTION
With head restraints that are not
installed and adjusted properly,
there is a greater chance that
occupants will suffer a neck/spinal
injury in a crash. Do not drive until
the head restraints for all
occupants are installed and
adjusted properly.Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant’s
head. This position reduces the
chance of a neck injury in a crash.Pull the head restraint up to raise it.
To lower the head restraint, press
the button, located on the top of
the seatback, and push the
restraint down.
Push down on the head restraint
after the button is released to make
sure that it is locked in place.
The head restraints are not
designed to be removed.
1-2 Seats and Restraint System
Page 7 of 382
Front Seats
Manual Seats
{CAUTION
You can lose control of the
vehicle if you try to adjust a
manual driver’s seat while the
vehicle is moving. The sudden
movement could startle and
confuse you, or make you push a
pedal when you do not want to.
Adjust the driver’s seat only when
the vehicle is not moving.To move a manual seat forward or
rearward:
1. Lift the bar to unlock the seat.
2. Slide the seat to the desired
position and release the bar.
Try to move the seat with your body
to be sure the seat is locked in place.
Power Seats
On a vehicle with power seats, the
controls used to operate them are
located on the outboard side of the
seats.
To adjust the seat:
Move the seat forward or
rearward by sliding the control
forward or rearward.
Raise or lower the front or rear
part of the seat cushion by
moving the front or rear of the
control up or down.
Raise or lower the entire seat
cushion by moving the control
up or down.
Seats and Restraint System 1-3
Page 8 of 382
Manual Lumbar
On vehicles with this feature, the
knob is located on the outboard side
of the seat.
Turn the knob clockwise or
counterclockwise to increase or
decrease the lumbar support.
Power Lumbar
On vehicles with this feature, the
control is located on the outboard
side of the seat(s).
To increase or decrease lumbar
support, press and hold the front or
rear of the control.
Heated Seats
This feature heats the cushion and
seatbacks.
On vehicles with this feature the
controls may be located on the
outboard sides of the front seats.
Press the top of the switch to turn
the heat to the high setting. Press
the bottom of the switch to turn the
heat to the low setting. Put the switch
in the center position to turn the
heat off.
1-4 Seats and Restraint System
Page 9 of 382

The ignition must be on for the
heated seat feature to work. The
seat will heat to the last setting if the
ignition has been turned off and then
turned back on.
For the heated seat feature to work
on the passenger seat the safety
belt must be fastened.
If the controls are located on the
center console, press the button to
turn the heated seat and seatback
on or off.
Each time the button is pressed, the
temperature settings change from
high, to low, to off. Indicator lights
on the button show the level of
heat selected: two for high, and
one for low.Reclining Seatbacks
{CAUTION
You can lose control of the
vehicle if you try to adjust a
manual driver’s seat while the
vehicle is moving. The sudden
movement could startle and
confuse you, or make you push a
pedal when you do not want to.
Adjust the driver’s seat only when
the vehicle is not moving.
{CAUTION
If either seatback is not locked, it
could move forward in a sudden
stop or crash. That could cause
injury to the person sitting there.
Always push and pull on the
seatbacks to be sure they are
locked.The seats have manual reclining
seatbacks. The lever used to
operate them is located on the
outboard side of the seats.
To recline the seatback:
1. Lift the recline lever and move the
seatback to the desired position,
then release the lever to lock the
seatback in place.
2. Push and pull on the seatback to
make sure it is locked.
Seats and Restraint System 1-5
Page 10 of 382

To return the seatback to an upright
position:
1. Lift the lever fully without
applying pressure to the
seatback.
2. Push and pull on the seatback to
make sure it is locked.{CAUTION
Sitting in a reclined position when
the vehicle is in motion can be
dangerous. Even if when buckled
up, the safety belts cannot do
their job when reclined like this.
The shoulder belt cannot do its job
because it will not be against your
body. Instead, it will be in front of
you. In a crash, you could go into
it, receiving neck or other injuries.
(Continued)
CAUTION (Continued)
The lap belt cannot do its job
either. In a crash, the belt could
go up over your abdomen. The
belt forces would be there, not at
your pelvic bones. This could
cause serious internal injuries.
For proper protection when the
vehicle is in motion, have the
seatback upright. Then sit well
back in the seat and wear the
safety belt properly.
Do not have a seatback reclined
when the vehicle is moving.
1-6 Seats and Restraint System
Page 12 of 382
Returning the Seatbacks to an
Upright Position
{CAUTION
If either seatback is not locked, it
could move forward in a sudden
stop or crash. That could cause
injury to the person sitting there.
Always push and pull on the
seatbacks to be sure they are
locked.
{CAUTION
A safety belt that is improperly
routed, not properly attached, or
twisted will not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. After raising the
rear seatback, always check to be
sure that the safety belts are
properly routed and attached, and
are not twisted.To return the seatback(s) to the
upright position:
1. Lift the seatback up and push it
all the way rearward.
2. Reach under the front seat and
lift the cushion while moving it
rearward until it latches.
3. Pull forward on the seatback and
push down on the seat cushion
to make sure the seat is
securely in place.
1-8 Seats and Restraint System