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 5 of 382

Seats and
Restraint System
Head Restraints
Head Restraints..................1-2
Front Seats
Manual Seats.....................1-3
Power Seats.......................1-3
Manual Lumbar..................1-4
Power Lumbar....................1-4
Heated Seats.....................1-4
Reclining Seatbacks...........1-5
Rear Seats
60/40 Split Bench
Seat (H3)..........................1-7
60/40 Split Bench
Seat (H3T)........................1-9
Safety Belts
Safety Belts: They Are for
Everyone.........................1-11
How to Wear Safety Belts
Properly..........................1-14
Lap-Shoulder Belt.............1-20
Safety Belt Use During
Pregnancy.......................1-25
Safety Belt Extender.........1-25
Child Restraints
Older Children..................1-25
Infants and Young
Children..........................1-28
Child Restraint Systems. . . .1-31
Where to Put the
Restraint.........................1-32
Lower Anchors and
Tethers for Children
(LATCH)
..........................1-34
Securing a Child
Restraint in a Rear
Outside Seat Position
......1-41
Securing a Child
Restraint in the Center
Rear Seat Position
..........1-43
Securing a Child
Restraint in the Right
Front Seat Position
.........1-43
Airbag System
Airbag System..................1-46
Where Are the Airbags?. . .1-49
When Should an Airbag
In ate?............................1-50
What Makes an Airbag
In ate?............................1-52
How Does an Airbag
Restrain?........................1-52
What Will You See After
an Airbag In ates?..........1-52
Passenger Sensing
System............................1-54
Servicing Your
Airbag-Equipped Vehicle. .1-58
Adding Equipment to
Your Airbag-Equipped
Vehicle
............................1-58
Restraint System Check
Checking the Restraint
Systems..........................1-60
Replacing Restraint
System Parts After a
Crash
..............................1-60
Seats and Restraint System 1-1
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 11 of 382
Rear Seats
60/40 Split Bench
Seat (H3)
The 60/40 split bench seats can be
folded for more cargo space.
Folding the Seatbacks
There should be nothing on, under,
or in front of the seat, and the front
seats should be moved forward.
To fold the rear seatback(s):
1. Reach under the front of the seat
and lift the cushion up while
moving it forward.2. Pull the seat cushion forward
until it rests in the footwell.
Notice:Folding a rear seat with
the safety belts still fastened may
cause damage to the seat or the
safety belts. Always unbuckle the
safety belts and return them to
their normal stowed position
before folding a rear seat.3. Lift the latch on top of the
seatback and pull the seatback
forward. Fold the seatback
down until it is nearly at.
4. If the seatback will not fold nearly
at, try moving the front seat
forward and/or moving the front
seatback more upright.
5. Repeat the steps for the other half
of the 60/40 split bench seat.
Seats and Restraint System 1-7
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
Page 13 of 382
60/40 Split Bench
Seat (H3T)
Notice:Folding a rear seat with
the safety belts still fastened may
cause damage to the seat or the
safety belts. Always unbuckle the
safety belts and return them to
their normal stowed position
before folding a rear seat.To fold the rear seatback(s) forward:
1. Disconnect the rear center safety
belt latch from the mini buckle by
inserting the tip of the safety belt
into the slot on the buckle. Let the
belt retract.2. Pull the loop, located on the
outboard side of the seatback,
forward until you hear a click.
3. Fold the seatback forward slightly
so that the headrest can be
removed.
Seats and Restraint System 1-9