tire size HUMMER H3 2008 User Guide

When It Is Time for New Tires
Various factors, such as maintenance, temperatures,
driving speeds, vehicle loading, and road conditions,
inuence when you need new tires.
One way to tell when it is
time for new tires is to
check the treadwear
indicators, which appear
when your tires have
only 1/16 inch (1.6 mm) or
less of tread remaining.
Some commercial
truck tires may not have
treadwear indicators.You need new tires if any of the following statements
are true:You can see the indicators at three or more places
around the tire.
You can see cord or fabric showing through the
tire’s rubber.
The tread or sidewall is cracked, cut, or snagged
deep enough to show cord or fabric.
The tire has a bump, bulge, or split.
The tire has a puncture, cut, or other damage that
cannot be repaired well because of the size or
location of the damage.
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The rubber in tires degrades over time, even if they are
not being used. This is also true for the spare tire, if
your vehicle has one. Multiple conditions affect how fast
this aging takes place, including temperatures, loading
conditions, and ination pressure maintenance. With
proper care and maintenance tires will typically wear out
before they degrade due to age. If you are unsure
about the need to replace your tires as they get older,
consult the tire manufacturer for more information.
Buying New Tires
GM has developed and matched specic tires for
your vehicle. The original equipment tires installed
on your vehicle, when it was new, were designed to
meet General Motors Tire Performance Criteria
Specication (TPC spec) system rating. If you need
replacement tires, GM strongly recommends that
you get tires with the same TPC Spec rating.This way, your vehicle will continue to have tires
that are designed to give the same performance
and vehicle safety, during normal use, as the
original tires.
GM’s exclusive TPC Spec system considers over
a dozen critical specications that impact the
overall performance of your vehicle, including
brake system performance, ride and handling,
traction control, and tire pressure monitoring
performance. GM’s TPC Spec number is molded
onto the tire’s sidewall near the tire size. If the
tires have an all-season tread design, the
TPC spec number will be followed by a MS,
for mud and snow. SeeTire Sidewall Labeling
on page 5-55for additional information.
GM recommends replacing tires in sets of four.
This is because uniform tread depth on all
tires will help keep your vehicle performing
most like it did when the tires were new.
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Replacing less than a full set of tires can affect
the braking and handling performance of your
vehicle. SeeTire Inspection and Rotation
on page 5-68for information on proper tire
rotation.
{CAUTION:
Mixing tires could cause you to lose
control while driving. If you mix tires of
different sizes, brands, or types (radial
and bias-belted tires) the vehicle may not
handle properly, and you could have a
crash. Using tires of different sizes,
brands, or types may also cause damage
to your vehicle. Be sure to use the correct
size, brand, and type of tires on your
vehicle’s wheels.
{CAUTION:
If you use bias-ply tires on your vehicle,
the wheel rim anges could develop
cracks after many miles of driving. A tire
and/or wheel could fail suddenly, causing
a crash. Use only radial-ply tires with the
wheels on your vehicle.
If you must replace your vehicle’s tires with those
that do not have a TPC Spec number, make
sure they are the same size, load range, speed
rating, and construction type (radial and
bias-belted tires) as your vehicle’s original tires.
Vehicles equipped with a tire pressure monitoring
system may give an inaccurate low-pressure
warning if non-TPC spec rated tires are installed
on your vehicle. Non-TPC Spec rated tires
may give a low-pressure warning that is higher or
lower than the proper warning level you would
get with TPC Spec rated tires. SeeTire Pressure
Monitor System on page 5-63.
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Your vehicle’s original equipment tires are listed
on the Tire and Loading Information Label.
SeeLoading Your Vehicle on page 4-42, for more
information about the Tire and Loading Information
Label and its location on your vehicle.
Different Size Tires and Wheels
If you add wheels or tires that are a different size than
your original equipment wheels and tires, this could
affect the way your vehicle performs, including its
braking, ride and handling characteristics, stability, and
resistance to rollover. Additionally, if your vehicle
has electronic systems such as anti-lock brakes, rollover
airbags, traction control, and electronic stability control,
the performance of these systems can be affected.
{CAUTION:
If you add different sized wheels, your vehicle
may not provide an acceptable level of
performance and safety if tires not
recommended for those wheels are selected.
You may increase the chance that you will
crash and suffer serious injury. Only use
GM specic wheel and tire systems developed
for your vehicle, and have them properly
installed by a GM certied technician.
SeeBuying New Tires on page 5-71andAccessories
and Modifications on page 5-3for additional information.
5-73

Tire Chains
{CAUTION:
If your vehicle has LT285/75R16 or P265/65R18
size tires, do not use tire chains. They can
damage your vehicle because there is not
enough clearance. Tire chains used on a
vehicle without the proper amount of clearance
can cause damage to the brakes, suspension,
or other vehicle parts. The area damaged by
the tire chains could cause you to lose control
of your vehicle and you or others may be
injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions. Follow that manufacturer’s
CAUTION: (Continued)
CAUTION: (Continued)
instructions. To help avoid damage to your
vehicle, drive slowly, readjust, or remove the
device if it is contacting your vehicle, and do
not spin your vehicle’s wheels.
If you do nd traction devices that will t,
install them on the rear tires.
Notice:If your vehicle has a tire size other than
LT285/75R16 or P265/65R18 use tire chains only
where legal and only when you must. Use chains that
are the proper size for your tires. Install them on the
tires of the rear axle. Do not use chains on the tires of
the front axle. Tighten them as tightly as possible
with the ends securely fastened. Drive slowly and
follow the chain manufacturer’s instructions. If you
can hear the chains contacting your vehicle, stop and
retighten them. If the contact continues, slow down
until it stops. Driving too fast or spinning the wheels
with chains on will damage your vehicle.
5-77

Spare Tire
Your vehicle, when new, had a fully-inated spare tire.
A spare tire may lose air over time, so check its
ination pressure regularly. SeeInflation - Tire Pressure
on page 5-62andLoading Your Vehicle on page 4-42
for information regarding proper tire ination and loading
your vehicle. For instruction on how to remove, install
or store a spare tire, seeRemoving the Flat Tire
and Installing the Spare Tire on page 5-83andStoring
a Flat or Spare Tire and Tools on page 5-89.
After installing the spare tire on your vehicle, you should
stop as soon as possible and make sure the spare is
correctly inated. The spare tire is made to perform well
at speeds up to 70 mph (112 km/h) at the recommended
ination pressure, so you can nish your trip.
Have the damaged or at road tire repaired or replaced
as soon as you can and installed back onto your
vehicle. This way, a spare tire will be available in case
you need it again. Do not mix tires and wheels of
different sizes, because they will not t. Keep your spare
tire and its wheel together.
Appearance Care
Interior Cleaning
Your vehicle’s interior will continue to look its best if it is
cleaned often. Although not always visible, dust and
dirt can accumulate on your upholstery. Dirt can damage
carpet, fabric, leather, and plastic surfaces. Regular
vacuuming is recommended to remove particles
from your upholstery. It is important to keep your
upholstery from becoming and remaining heavily soiled.
Soils should be removed as quickly as possible. Your
vehicle’s interior may experience extremes of heat
that could cause stains to set rapidly.
Lighter colored interiors may require more frequent
cleaning. Use care because newspapers and garments
that transfer color to your home furnishings may also
transfer color to your vehicle’s interior.
5-91

Starting the Engine.........................................2-20
Steering.......................................................... 4-8
Steering Wheel, Tilt Wheel................................. 3-7
Storage Areas
Convenience Net.........................................2-59
Cupholder(s)...............................................2-56
Front Armrest Storage Area...........................2-57
Front Seat Storage Net................................2-57
Glove Box..................................................2-56
Luggage Carrier..........................................2-57
Rear Storage Area.......................................2-59
Stuck in Sand, Mud, Ice, or Snow.....................4-39
Sun Visors.....................................................2-13
Sunroof.........................................................2-60
Swing-gate.....................................................2-10
T
Tachometer....................................................3-27
Taillamps
Turn Signal, Stoplamps and Back-up Lamps....5-50
Theft-Deterrent, Radio.....................................3-61
Theft-Deterrent Systems...................................2-14
Content Theft-Deterrent................................2-14
PASS-Key
®III+...........................................2-16
PASS-Key®III+ Operation.............................2-16
Passlock®...................................................2-15Tilt Wheel........................................................ 3-7
Time, Setting..................................................3-48
Tire
Pressure Light.............................................3-35
Tires.............................................................5-54
Aluminum or Chrome-Plated Wheels,
Cleaning.................................................5-97
Buying New Tires........................................5-71
Chains.......................................................5-77
Changing a Flat Tire....................................5-79
Cleaning....................................................5-98
Different Size..............................................5-73
If a Tire Goes Flat.......................................5-78
Ination - Tire Pressure................................5-62
Inspection and Rotation................................5-68
Installing the Spare Tire................................5-83
Pressure Monitor Operation...........................5-65
Pressure Monitor System..............................5-63
Removing the Flat Tire.................................5-83
Removing the Spare Tire and Tools...............5-81
Spare Tire..................................................5-91
Storing a Flat or Spare Tire and Tools............5-89
Tire Sidewall Labeling..................................5-55
Tire Terminology and Denitions....................5-59
Uniform Tire Quality Grading.........................5-74
Wheel Alignment and Tire Balance.................5-75
Wheel Replacement.....................................5-75
When It Is Time for New Tires......................5-70
12

W
Warning Lights, Gages and Indicators................3-25
Warnings
DIC Warnings and Messages........................3-43
Hazard Warning Flashers............................... 3-6
Other Warning Devices.................................. 3-6
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Wheels
Alignment and Tire Balance..........................5-75
Different Size..............................................5-73
Replacement...............................................5-75
Where to Put the Restraint...............................1-40
Windows.......................................................2-11
Power........................................................2-12Windshield
Backglass, and Wiper Blades, Cleaning..........5-97
Washer......................................................3-10
Washer Fluid..............................................5-37
Wiper Blade Replacement.............................5-52
Wiper Fuses.............................................5-101
Wipers.......................................................3-10
Windshield, Rear Washer/Wiper........................3-11
Winter Driving................................................4-35
X
XM Radio Messages.......................................3-60
XM™ Satellite Radio Antenna System................3-62
Y
Your Vehicle and the Environment....................... 6-2
14