2007 HUMMER H3 height

(E) Tire Ply Material:The type of cord and
number of plies in the sidewall and under
the tread.
(F) Uniform Tire Quality Grading (UTQG):
Tire manufacturers are required to grade
tires based on three performance factors:
treadwear, traction, and temperature resistance.
For more information, seeUniform Tire Quality
Grading on page 386.
(G) Maximum Cold Ination Load Limit:
Maximum load that can be carried and the
maximum pressure needed to support that load.
For information on recommended tire pressure
seeInation - Tire Pressure on page 375
andLoading Your Vehicle on page 289.
(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.
Light Truck (LT-Metric) Tire
369

Tire Size
The following examples show the different parts of
a tire size.
(A) Passenger (P-Metric) Tire:The United
States version of a metric tire sizing system.
The letter P as the rst character in the tire size
means a passenger vehicle tire engineered
to standards set by the U.S. Tire and Rim
Association.(A) Light Truck (LT-Metric) Tire:The United
States version of a metric tire sizing system.
The letters LT as the rst two characters in the
tire size means a light truck tire engineered
to standards set by the U.S. Tire and Rim
Association.
(B) Tire Width:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 75, as
shown in item C of the light truck (LT-Metric) tire
illustration, it would mean that the tire’s sidewall is
75 percent as high as it is wide.
(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire.
The letter R means radial ply construction;
the letter D means diagonal or bias ply
construction; and the letter B means belted-bias
ply construction.
Passenger (P-Metric) Tire
Light Truck (LT-Metric) Tire
371

(E) Rim Diameter:Diameter of the wheel in
inches.
(F) Service Description:The service description
indicates the load range and speed rating of a
tire. The load index can range from 1 to 279.
Speed ratings range from A to Z.
Tire Terminology and Denitions
Air Pressure:The amount of air inside the tire
pressing outward on each square inch of the
tire. Air pressure is expressed in pounds
per square inch (psi) or kilopascal (kPa).
Accessory Weight:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic transmission/
transaxle, power steering, power brakes, power
windows, power seats, and air conditioning.
Aspect Ratio:The relationship of a tire’s height
to its width.
Belt:A rubber coated layer of cords that is located
between the plies and the tread. Cords may be
made from steel or other reinforcing materials.Bead:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
Bias Ply Tire:A pneumatic tire in which the plies
are laid at alternate angles less than 90 degrees
to the centerline of the tread.
Cold Tire Pressure:The amount of air pressure
in a tire, measured in pounds per square inch
(psi) or kilopascals (kPa) before a tire has built up
heat from driving. SeeInation - Tire Pressure
on page 375.
Curb Weight:This means the weight of a motor
vehicle with standard and optional equipment
including the maximum capacity of fuel, oil, and
coolant, but without passengers and cargo.
DOT Markings:A code molded into the sidewall
of a tire signifying that the tire is in compliance
with the U.S. Department of Transportation (DOT)
motor vehicle safety standards. The DOT code
includes the Tire Identication Number (TIN),
an alphanumeric designator which can also identify
the tire manufacturer, production plant, brand,
and date of production.
GVWR:Gross Vehicle Weight Rating. See
Loading Your Vehicle on page 289.
372

Your dealer will know the kind of wheel you need.
Each new wheel should have the same
load-carrying capacity, diameter, width, offset and
be mounted the same way as the one it
replaces.
If you need to replace any of your wheels, wheel
bolts, or wheel nuts, replace them only with
new GM original equipment parts. This way, you
will be sure to have the right wheel, wheel
bolts, and wheel nuts for your vehicle.
{CAUTION:
Using the wrong replacement wheels,
wheel bolts, or wheel nuts on your vehicle
can be dangerous. It could affect the
braking and handling of your vehicle,
make your tires lose air and make you
lose control. You could have a collision
in which you or others could be injured.
Always use the correct wheel, wheel bolts,
and wheel nuts for replacement.Notice:The wrong wheel can also cause
problems with bearing life, brake cooling,
speedometer or odometer calibration,
headlamp aim, bumper height, vehicle ground
clearance, and tire or tire chain clearance
to the body and chassis.
SeeChanging a Flat Tire on page 391for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has
been used or how far it has been driven.
It could fail suddenly and cause a crash.
If you have to replace a wheel, use a new
GM original equipment wheel.
388

Restraint System Check
Checking the Restraint Systems................. 82
Replacing Restraint System Parts
After a Crash......................................... 83
Retained Accessory Power (RAP)................ 103
Right Front Passenger Position,
Safety Belts............................................... 31
Roadside
Assistance Program................................. 454
Rocking Your Vehicle to Get it Out.............. 286
Routing, Engine Drive Belt.......................... 443
Running the Engine While Parked............... 121
S
Safety Belt
Passenger Reminder Light....................... 177
Pretensioners............................................. 38
Reminder Light........................................ 177
Safety Belts
Care of.................................................... 409
Driver Position........................................... 22
How to Wear Safety Belts Properly............ 22
Questions and Answers About
Safety Belts............................................ 21
Rear Safety Belt Comfort Guides............... 35
Rear Seat Passengers............................... 32Safety Belts (cont.)
Right Front Passenger Position.................. 31
Safety Belt Extender.................................. 38
Safety Belt Use During Pregnancy............. 31
Safety Belts Are for Everyone.................... 17
Shoulder Belt Height Adjuster.................... 30
Safety Warnings and Symbols......................... 4
Scheduled Maintenance............................... 429
Seats
60/40 Split Bench Seat.............................. 14
Head Restraints......................................... 13
Heated Seats............................................. 10
Manual........................................................ 8
Power Lumbar............................................. 9
Power Seats................................................ 9
Reclining Seatbacks................................... 10
Securing a Child Restraint
Center Rear Seat Position......................... 60
Rear Outside Seat Position........................ 57
Right Front Seat Position........................... 60
Security Light.............................................. 190
Service........................................................ 314
Accessories and Modications.................. 314
Adding Equipment to the Outside
of Your Vehicle..................................... 316
California Proposition 65 Warning............. 315
Doing Your Own Work............................. 315
477

Service (cont.)
Engine Soon Light................................... 186
Publications Ordering Information............. 465
Servicing Your Airbag-Equipped Vehicle......... 80
Setting the Time.......................................... 202
Sheet Metal Damage................................... 413
Shifting Into Park (P)................................... 117
Shifting Out of Park (P)............................... 119
Shoulder Belt Height Adjuster........................ 30
Side Steps.................................................. 271
Signals, Turn and Lane-Change.................. 156
Spare Tire................................................... 405
Installing.................................................. 396
Removing................................................ 393
Storing..................................................... 403
Specications, Capacities............................ 422
Speedometer............................................... 176
Split Bench Seat (60/40)............................... 14
StabiliTrak
®System..................................... 244
StabiliTrak®Not Ready Light........................ 184
Starting Your Engine................................... 103
Steering...................................................... 245
Steering Wheel, Tilt Wheel.......................... 154
Storage Areas
Convenience Net..................................... 146
Cupholder(s)............................................ 143
Front Armrest Storage Area...................... 143Storage Areas (cont.)
Front Seat Storage Net............................ 143
Glove Box................................................ 143
Luggage Carrier....................................... 144
Rear Storage Area................................... 146
Stuck in Sand, Mud, Ice, or Snow............... 286
Sun Visors.................................................... 97
Sunroof....................................................... 147
Swing-gate.................................................... 95
T
Tachometer................................................. 176
Taillamps
Turn Signal, Stoplamps and
Back-up Lamps..................................... 363
Theft-Deterrent, Radio................................. 230
Theft-Deterrent Systems................................ 98
Content Theft-Deterrent.............................. 98
Passlock
®................................................ 100
Tilt Wheel.................................................... 154
Tire
Pressure Light.......................................... 185
Tires........................................................... 367
Aluminum or Chrome-Plated Wheels,
Cleaning............................................... 412
Buying New Tires..................................... 383
478