2007 CHEVROLET IMPALA height

(B) Tire Ply Material:The type of cord and
number of plies in the sidewall and under the
tread.
(C) Tire Identication Number (TIN):The letters
and numbers following the DOT (Department of
Transportation) code is the Tire Identication
Number (TIN). The TIN shows the manufacturer
and plant code, tire size, and date the tire
was manufactured. The TIN is molded onto both
sides of the tire, although only one side may have
the date of manufacture.
(D) Maximum Cold Ination Load Limit:
Maximum load that can be carried and the
maximum pressure needed to support that load.(E) Tire Ination:The temporary use tire or
compact spare tire should be inated to 60 psi
(420 kPa). For more information on tire pressure
and ination seeInation - Tire Pressure on
page 359.
(F) Tire Size:A combination of letters and
numbers dene a tire’s width, height, aspect ratio,
construction type, and service description. The
letter T as the rst character in the tire size means
the tire is for temporary use only.
(G) 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.
354

Tire Size
The following illustration shows an example of a
typical passenger vehicle 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.
(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 60, as
shown in item C of the illustration, it would mean
that the tire’s sidewall is 60 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.
(E) Rim Diameter:Diameter of the wheel
in inches.
(F) Service Description:These characters
represent the load range and speed rating of the
tire. The load index represents the load carry
capacity a tire is certied to carry. The load index
can range from 1 to 279. The speed rating is
the maximum speed a tire is certied to carry a
load. Speed ratings range from A to Z.
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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,
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 359.
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.
356

Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming
loose, the wheel, wheel bolts, and wheel
nuts should be replaced. If the wheel leaks air,
replace it (except some aluminum wheels,
which can sometimes be repaired). See your
dealer/retailer if any of these conditions exist.
Your dealer/retailer 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 374for more
information.
371

Rear Safety Belt Comfort Guides.................. 37
Rear Seat Armrest...................................... 144
Rear Seat Passengers, Safety Belts.............. 35
Rear Storage Area...................................... 144
Rearview Mirror, Automatic Dimming
with OnStar
®............................................ 126
Rearview Mirror with OnStar®...................... 126
Rearview Mirrors......................................... 126
Reclining Seatbacks...................................... 11
Recommended Fluids and Lubricants.......... 417
Recreational Vehicle Towing........................ 282
Remote Keyless Entry (RKE) System............ 90
Remote Keyless Entry (RKE) System,
Operation................................................... 91
Removing the Flat Tire and Installing
the Spare Tire.......................................... 377
Removing the Spare Tire and Tools............ 375
Replacement Bulbs..................................... 349
Reporting Safety Defects
Canadian Government............................. 441
General Motors........................................ 441
United States Government....................... 440
Restraint System Check
Checking the Restraint Systems................. 84
Replacing Restraint System Parts
After a Crash......................................... 85
Retained Accessory Power (RAP)................ 113Right Front Passenger Position,
Safety Belts............................................... 33
Roadside
Assistance Program................................. 432
Rocking Your Vehicle to Get it Out.............. 277
Routing, Engine Drive Belt.......................... 420
Running the Engine While Parked............... 125
S
Safety Belt
Passenger Reminder Light....................... 177
Pretensioners............................................. 40
Reminder Light........................................ 177
Safety Belts
Care of.................................................... 390
Center Front Passenger Position................ 34
Driver Position........................................... 24
How to Wear Safety Belts Properly............ 23
Questions and Answers About
Safety Belts............................................ 22
Rear Safety Belt Comfort Guides............... 37
Rear Seat Passengers............................... 35
Right Front Passenger Position.................. 33
Safety Belt Extender.................................. 40
Safety Belt Use During Pregnancy............. 33
Safety Belts Are for Everyone.................... 18
Shoulder Belt Height Adjuster.................... 32
456

Safety Warnings and Symbols......................... 4
Scheduled Maintenance............................... 408
Seats
Center Seat............................................... 14
Head Restraints......................................... 13
Heated Seats............................................. 10
Manual Lumbar.......................................... 10
Manual Passenger....................................... 9
Power Seats................................................ 9
Reclining Seatbacks................................... 11
Split Folding Rear Seat.............................. 15
Securing a Child Restraint
Center Front Seat Position......................... 63
Rear Seat Position..................................... 61
Right Front Seat Position........................... 64
Security Light.............................................. 189
Service........................................................ 296
Accessories and Modications.................. 296
Adding Equipment to the Outside of
Your Vehicle......................................... 298
California Proposition 65 Warning............. 297
Doing Your Own Work............................. 297
Engine Soon Light................................... 185
Publications Ordering Information............. 441
Servicing Your Airbag-Equipped Vehicle......... 82
Sheet Metal Damage................................... 393
Shifting Into Park (P)................................... 121Shifting Out of Park (P)............................... 123
Shoulder Belt Height Adjuster........................ 32
Signals, Turn and Lane-Change.................. 154
Spare Tire
Compact.................................................. 385
Installing.................................................. 377
Removing................................................ 375
Storing..................................................... 383
Specications, Capacities............................ 403
Speedometer............................................... 176
Split Folding Rear Seat ................................. 15
Starting Your Engine................................... 113
Steering...................................................... 257
Steering Wheel Controls, Audio................... 243
Steering Wheel, Tilt Wheel.......................... 153
Storage Areas
Center Console Storage Area................... 144
Convenience Net..................................... 145
Cupholder(s)............................................ 144
Glove Box................................................ 144
Rear Seat Armrest................................... 144
Rear Storage Area................................... 144
Sunglasses Storage Compartment............ 144
Stuck in Sand, Mud, Ice, or Snow............... 276
Sun Visors.................................................. 107
Sunroof....................................................... 145
System Identication, Universal Home
Remote System....................................... 132
457