tire size GMC SIERRA CLASSIC 2007 User Guide

You need a new tire 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.
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 by the tire manufacturer.
If the tires have an all-season tread design,
the TPC spec number will be followed by an MS
for mud and snow. SeeTire Sidewall Labeling
on page 544for additional information.
556

{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 same
size, brand, and type tires on all wheels.
Your vehicle may have a different size
spare than the road tires (those originally
installed on your vehicle). When new, your
vehicle included a spare tire and wheel
assembly with a similar overall diameter
as your vehicle’s road tires and wheels,
so it is all right to drive on it. Because
this spare was developed for use on your
vehicle, it will not affect vehicle handling.
{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.
Your vehicle’s original equipment tires are listed
on the Tire and Loading Information Label.
This label is attached to the vehicle’s center pillar
(B-pillar). SeeLoading Your Vehicle on page 409,
for more information about the Tire and Loading
Information Label and its location on your vehicle.
557

Different Size Tires and Wheels
If you add wheels or tires that are a different size
than your original equipment wheels and tires,
this may 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, 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 556and
Accessories and Modications on page 468for
additional information.
558

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.
Tire Chains
{CAUTION:
If your vehicle has dual wheels or
P265/75R16, LT265/75R16, P265/70R17 or
P275/55R20 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.
CAUTION: (Continued)
562

CAUTION: (Continued)
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 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 does not have dual
wheels and is equipped with a tire size other
than P265/75R16, LT265/75R16, P265/70R17
or P275/55R20, 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. Don’t 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.
If a Tire Goes Flat
It is unusual for a tire to blowout while you are
driving, especially if you maintain your vehicle’s
tires properly. If air goes out of a tire, it is
much more likely to leak out slowly. But if you
should ever have a blowout, here are a few tips
about what to expect and what to do:
If a front tire fails, the at tire will create a drag
that pulls the vehicle toward that side. Take
your foot off the accelerator pedal and grip the
steering wheel rmly. Steer to maintain lane
position, and then gently brake to a stop well out
of the traffic lane.
563

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. SeeInation - Tire
Pressure on page 551andLoading Your Vehicle on
page 409for information regarding proper tire
ination and loading your vehicle. For instruction on
how to remove, install or store a spare tire, see
Removing the Flat Tire and Installing the Spare Tire
on page 571andStoring a Flat or Spare Tire and
Tools on page 584.
Notice:If your vehicle has four-wheel drive
and the different size spare tire is installed
on your vehicle, do not drive in four-wheel
drive until you can have your at tire repaired
and/or replaced. You could damage your
vehicle, and the repair costs would not be
covered by your warranty. Never use
four-wheel drive when the different size spare
tire is installed on your vehicle.Your vehicle may have a different size spare tire
than the road tires originally installed on your
vehicle. This spare tire was developed for use on
your vehicle, so it is all right to drive on it. If
your vehicle has four-wheel drive and the different
size spare tire is installed, keep the vehicle in
two-wheel drive.
After installing the spare tire on your vehicle, you
should stop as soon as possible and make
sure the spare tire is correctly inated. Have the
damaged or at road tire repaired or replaced
as soon as you can and installed back onto your
vehicle. This way, the 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. If your vehicle has a spare
tire that does not match your vehicle’s original road
tires and wheels in size and type, do not include
the spare in the tire rotation.
588

Spare Tire (cont.)
Removing................................................ 566
Storing..................................................... 584
Specications, Capacities............................ 609
Speedometer............................................... 246
Starting Your Engine................................... 137
Steering...................................................... 367
Steering Wheel Controls, Audio................... 349
Steering Wheel, Tilt Wheel.......................... 213
Storage Areas
Center Console Storage Area................... 202
Cupholder(s)............................................ 202
Front Storage Area.................................. 202
Glove Box................................................ 202
Stuck in Sand, Mud, Ice, or Snow............... 406
Sun Visors.................................................. 131
Sunroof....................................................... 205
Swing-Out Windows.................................... 131
T
Tachometer................................................. 246
Tailgate....................................................... 127
Taillamps
Turn Signal, Stoplamps and Back-up
Lamps.................................................. 539Theft-Deterrent, Radio................................. 348
Theft-Deterrent Systems.............................. 131
Content Theft-Deterrent............................ 131
Passlock
®................................................ 133
Tilt Wheel.................................................... 213
Tires........................................................... 543
Aluminum or Chrome-Plated Wheels,
Cleaning............................................... 594
Buying New Tires..................................... 556
Chains..................................................... 562
Changing a Flat Tire................................ 564
Cleaning.................................................. 595
Different Size........................................... 558
Dual Tire Operation.................................. 552
If a Tire Goes Flat................................... 563
Ination - Tire Pressure............................ 551
Inspection and Rotation............................ 553
Installing the Spare Tire........................... 571
Removing the Flat Tire............................. 571
Removing the Spare Tire and Tools......... 566
Secondary Latch System ......................... 580
Spare Tire................................................ 588
Storing a Flat or Spare Tire and Tools..... 584
Tire Sidewall Labeling.............................. 544
Tire Terminology and Denitions............... 548
672

Vehicle Identication
Number (VIN).......................................... 598
Service Parts Identication Label.............. 598
Ventilation Adjustment.................................. 243
Visors.......................................................... 131
Voltmeter Gage........................................... 253
W
Warning Lights, Gages and Indicators......... 244
Warnings
DIC Warnings and Messages................... 270
Hazard Warning Flashers......................... 212
Other Warning Devices............................ 213
Safety and Symbols..................................... 4
Vehicle Damage.......................................... 5
Wheels
Alignment and Tire Balance..................... 560
Different Size........................................... 558
Replacement............................................ 560
Where to Put the Restraint............................ 55
Windows..................................................... 129
Manual..................................................... 129
Power...................................................... 130Windows (cont.)
Sliding Rear............................................. 131
Swing-Out Windows................................. 131
Windshield
Washer.................................................... 217
Washer Fluid........................................... 516
Wiper Blade Replacement........................ 542
Wiper Blades, Cleaning............................ 594
Wiper Fuses............................................ 599
Wipers..................................................... 216
Winter Driving............................................. 402
X
XM Radio Messages................................... 332
XM™ Satellite Radio Antenna System......... 353
Y
Your Vehicle and the Environment............... 615
674