height HUMMER H2 2007 Owners Manual

Head Restraints
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. Push the
head restraint down to lower it.
Each front head restraint can also be tilted forward
to four positions by pulling on it. A click will
sound after each tilt position is reached. Pull the
head restraint forward, past the last position,
to release it to the upright position.
The rear seat head restraints are also adjustable
up and down, but they do not tilt.
14

Q:What are the different types of add-on
child restraints?
A:Add-on child restraints, which are purchased by
the vehicle’s owner, are available in four basic
types. Selection of a particular restraint should
take into consideration not only the child’s
weight, height, and age but also whether or not
the restraint will be compatible with the motor
vehicle in which it will be used.
For most basic types of child restraints, there
are many different models available. When
purchasing a child restraint, be sure it is
designed to be used in a motor vehicle. If it is,
the restraint will have a label saying that it
meets federal motor vehicle safety standards.
The restraint manufacturer’s instructions
that come with the restraint state the weight
and height limitations for a particular child
restraint. In addition, there are many kinds of
restraints available for children with
special needs.
{CAUTION:
Newborn infants need complete support,
including support for the head and neck.
This is necessary because a newborn
infant’s neck is weak and its head weighs
so much compared with the rest of its
body. In a crash, an infant in a rear-facing
seat settles into the restraint, so the crash
forces can be distributed across the
strongest part of an infant’s body, the back
and shoulders. Infants always should be
secured in appropriate infant restraints.
52

Adding Equipment to Your
Airbag-Equipped Vehicle
Q:Is there anything I might add to the front
of the vehicle that could keep the airbags
from working properly?
A:Yes. If you add things that change your
vehicle’s frame, bumper system, height,
front end or side sheet metal, they may keep
the airbag system from working properly.
Also, the airbag system may not work properly
if you relocate any of the airbag sensors. If
you have any questions about this, you should
contact Customer Assistance before you
modify your vehicle. The phone numbers and
addresses for Customer Assistance are in
Step Two of theCustomer Satisfaction
Procedure on page 536.
Q:Because I have a disability, I have to get
my vehicle modied. How can I nd out
whether this will affect my airbag system?
A:Changing or moving any parts of the
front seats, safety belts, the airbag sensing
and diagnostic module, steering wheel,
the instrument panel, or airbag wiring can
affect the operation of the airbag system. If
you have questions, call Customer Assistance.
The phone numbers and addresses for
Customer Assistance are in Step Two of the
Customer Satisfaction Procedure in this
manual. SeeCustomer Satisfaction Procedure
on page 536.
89

The main components of your instrument panel are the following:
A. Air Outlets. SeeOutlet Adjustment on page 203.
B. Exterior Lamps Control. SeeExterior Lamps on
page 186.
C. Heated Windshield Washer Control
(If Equipped). SeeWindshield Washer on
page 181.
D. OnStar
®and Radio Steering Wheel Buttons.
SeeOnStar®System on page 144and
Audio Steering Wheel Controls on page 296.
E. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 205.
F. Locking Rear Axle and Full-Time Four-Wheel
Drive Buttons. SeeLocking Rear Axle on
page 311andFull-Time Four-Wheel Drive on
page 128.
G. Audio System. SeeAudio System(s) on
page 241.
H. Airbag Switch. SeeAirbag Off Switch on
page 84.
I. Glove Box. SeeGlove Box on page 160.J. Midgate Glass Up/Down Switch (SUT).
SeeMidgate
®(SUT) on page 105. Rear
Wiper/Washer Switch (SUV). SeeRear Window
Wiper/Washer (SUV) on page 182.
K. Dome Override Button. SeeDome Lamp
Override on page 191.
L. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 178.
M. Tilt Lever. SeeTilt Wheel on page 177.
N. Driver Information Center (DIC) Buttons. See
Driver Information Center (DIC) on page 222.
O. Parking Brake Release. SeeParking Brake
on page 133.
P. Traction Control Button. SeeTraction Control
System (TCS) on page 309.
Q. Tow/Haul Selector Button. See “Tow/Haul
Mode” underTowing a Trailer on page 374.
R. Ride Height Selector Button (If Equipped). See
Selectable Extended Rear Ride Height on
page 371.
175

Your Driving, the Road, and
Your Vehicle............................................ 302
Defensive Driving...................................... 302
Drunken Driving........................................ 303
Control of a Vehicle.................................. 306
Braking...................................................... 306
Anti-Lock Brake System (ABS).................. 307
Braking in Emergencies............................. 309
Traction Control System (TCS).................. 309
Locking Rear Axle..................................... 311
Steering.................................................... 312
Off-Road Recovery.................................... 314
Passing..................................................... 314
Loss of Control.......................................... 316
Off-Road Driving........................................ 317
Assist Steps.............................................. 338
Driving at Night......................................... 342
Driving in Rain and on Wet Roads............ 344
City Driving............................................... 347
Freeway Driving........................................ 348Before Leaving on a Long Trip.................. 349
Highway Hypnosis..................................... 350
Hill and Mountain Roads........................... 351
Winter Driving........................................... 353
If Your Vehicle is Stuck in Sand, Mud,
Ice, or Snow.......................................... 357
Rocking Your Vehicle to Get It Out........... 358
Recovery Loops........................................ 358
First Aid Kit and Tool Kit........................... 360
Front Mounted Receiver............................ 360
Power Winch Platform............................... 361
Loading Your Vehicle................................ 362
Towing........................................................ 369
Towing Your Vehicle ................................. 369
Recreational Vehicle Towing...................... 369
Selectable Extended Rear Ride Height...... 371
Electronically Controlled Air Suspension
System.................................................. 372
Towing a Trailer........................................ 374
Trailer Recommendations.......................... 388
Section 4 Driving Your Vehicle
301

Selectable Extended Rear Ride
Height
If your vehicle has this feature it comes as part
of the electronically controlled air suspension
system.
The selectable rear ride height allows you to raise
the rear of the vehicle about 2 inches (5 cm)
over the normal ride height. This can be helpful
when driving off-road where you may need
more ground clearance to clear an obstacle.
The button that controls
this feature is located
on the instrument panel
to the right of the
steering wheel.To use this feature, ensure that the following
conditions are met:
The engine must be running.
All doors must be fully closed. The suspension
will not raise or lower if a door is open.
The vehicle speed must be less than 40 mph
(64 km/h). The system will not activate
otherwise.
Press the height control button to raise the rear of
the vehicle.
A light in the button will begin to ash as the rear
of the vehicle rises. Once the extended height
has been reached (this may take up to a minute),
the warning light will stop ashing and will stay
lit while the vehicle is at the extended height.
371

To lower the vehicle to the normal ride height,
press the button again. The light in the button will
ash as the suspension lowers. When the light
in the button stops ashing and goes out,
the suspension has reached the normal ride
height.
This feature will lower the vehicle to the normal
height if vehicle speed exceeds 40 mph (64 km/h).
You may also want to use this feature when
ascending, descending or cresting a steep hill as
this can help prevent the rear bumper from
dragging on the base of the hill or prevent the
vehicle from grounding out (high centering) on the
crest of the hill.
Do not use this feature when towing a trailer.Electronically Controlled Air
Suspension System
The electronically controlled air suspension, if
equipped, keeps the rear of your vehicle level as
you load and unload it. The system includes a
compressor, two height sensor and two air springs
supporting the vehicle.
The engine must be running for the system to
level the vehicle after loading or unloading.
The system will suspend transitioning between
the designed ride height and the extended
ride height if any of the doors are open. However,
the system will not suspend operation during
normal leveling and once the doors are closed,
system leveling will continue.
You may hear the compressor running when you
load your vehicle, and periodically as the system
adjusts the vehicle to the standard ride height.
372

You may also hear the release of air similar to a
hissing sound during suspension operation.
This is normal.
Load leveling will not function normally with the
inator hose attached to the inator outlet.
Remove the inater hose from the outlet when
it is not in use. SeeAccessory Inator on
page 466.
Overload and Overheat Protection
Overload protection is designed to protect the air
suspension system and is an indication to the
driver that the vehicle is overloaded.
If the rear suspension remains at a low height, the
rear axle load has exceeded GAWR (Gross Axle
Weight Rating). When the overload protection
mode is activated, the compressor operates forabout 30 seconds to one minute without raising the
vehicle depending on the amount of overload.
This will continue each time the ignition is turned on
until the rear axle load is reduced below GAWR.
If the total rear GAWR (Gross Axle Weight Rating)
is reached, the suspension may be slightly less
than level. This is normal and does not mean there
is a problem with the air suspension.
If the system overheats due to normal operation,
the SERVICE AIR SUSPENSION message
will not be displayed on the DIC, but the system
will shut down and stop all leveling functions until it
cools down. If the system overheats and sets
the SERVICE AIR SUSPENSION message in the
DIC, then there is a fault. SeeDIC Warnings
and Messages on page 226for more information.
373

Some driving conditions or climates may cause a
brake squeal when the brakes are rst applied
or lightly applied. This does not mean something
is wrong with your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated,
inspect brake pads for wear and evenly tighten
wheel nuts in the proper sequence to GM torque
specications.
Brake linings should always be replaced as
complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return
to normal height, or if there is a rapid increase in
pedal travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you make a brake stop, your disc
brakes adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its
many parts have to be of top quality and work well
together if the vehicle is to have really good
braking. Your vehicle was designed and tested
with top-quality GM brake parts. When you replace
parts of your braking system — for example,
when your brake linings wear down and you need
new ones put in — be sure you get new
approved GM replacement parts. If you do not,
your brakes may no longer work properly. For
example, if someone puts in brake linings that are
wrong for your vehicle, the balance between your
front and rear brakes can change — for the worse.
The braking performance you have come to expect
can change in many other ways if someone puts in
the wrong replacement brake parts.
430

Tire Sidewall Labeling
Useful information about a tire is molded into the
sidewall. The following illustrations are examples
of a typical P-Metric and a LT-Metric tire sidewall.(A) Tire Size:The tire size code is a combination
of letters and numbers used to dene a particular
tire’s width, height, aspect ratio, construction
type, and service description. See the “Tire Size”
illustration later in this section for more detail.
(B) TPC Spec (Tire Performance Criteria
Specication):Original equipment tires designed
to GM’s specic tire performance criteria have
a TPC specication code molded onto the sidewall.
GM’s TPC specications meet or exceed all
federal safety guidelines.
(C) DOT (Department of Transportation):
The Department of Transportation (DOT) code
indicates that the tire is in compliance with the
U.S. Department of Transportation Motor Vehicle
Safety Standards.
Passenger (P-Metric) Tire
449