2007 CHEVROLET TRAIL BLAZER wheel size

Windshield Wiper Blade Replacement....... 444
Tires............................................................ 448
Winter Tires.............................................. 449
Tire Sidewall Labeling............................... 450
Tire Terminology and Denitions............... 454
Ination - Tire Pressure............................. 457
High-Speed Operation............................... 458
Tire Pressure Monitor System................... 459
Tire Inspection and Rotation...................... 464
When It Is Time for New Tires.................. 466
Buying New Tires...................................... 466
Different Size Tires and Wheels................ 468
Uniform Tire Quality Grading..................... 469
Wheel Alignment and Tire Balance............ 470
Wheel Replacement.................................. 470
Tire Chains............................................... 472
Accessory Inator...................................... 472
If a Tire Goes Flat.................................... 474
Changing a Flat Tire................................. 474
Removing the Spare Tire and Tools.......... 476
Removing the Flat Tire and Installing
the Spare Tire....................................... 479Secondary Latch System........................... 484
Storing a Flat or Spare Tire and Tools...... 488
Spare Tire................................................. 491
Appearance Care........................................ 491
Cleaning the Inside of Your Vehicle.......... 491
Fabric/Carpet............................................. 493
Leather...................................................... 494
Instrument Panel, Vinyl, and Other
Plastic Surfaces..................................... 494
Care of Safety Belts.................................. 495
Weatherstrips............................................ 495
Washing Your Vehicle............................... 495
Cleaning Exterior Lamps/Lenses................ 496
Finish Care............................................... 496
Windshield, Backglass, and
Wiper Blades......................................... 497
Aluminum Wheels...................................... 498
Tires......................................................... 498
Sheet Metal Damage................................. 498
Finish Damage.......................................... 499
Underbody Maintenance............................ 499
Chemical Paint Spotting............................ 499
Vehicle Care/Appearance Materials............ 500
Section 5 Service and Appearance Care
384

Low-Prole Performance Tire
(Trailblazer SS)
If your vehicle has P255/50R20 size tires, they are
classied as low-prole performance tires.
These tires are designed for very responsive
driving on wet or dry pavement. You may
also notice more road noise with low-prole
performance tires and that they tend to
wear faster.
Notice:If your vehicle has low-prole tires,
they are more susceptible to damage from road
hazards or curb impact than standard prole
tires. Tire and/or wheel assembly damage
can occur when coming into contact with road
hazards like, potholes, or sharp edged objects,
or when sliding into a curb. Your GM warranty
does not cover this type of damage. Keep
tires set to the correct ination pressure and,
when possible avoid contact with curbs,
potholes, and other road hazards.
Winter Tires
For cold weather driving conditions you may prefer
to get tires designed for snow or ice, if your
vehicle has P255/50R20 size tires. See your
dealer for details regarding winter tire availability
and proper tire selection. Also, seeBuying New
Tires on page 466.
If you choose to use winter tires:
Use tires of the same brand and tread type
on all four wheel positions.
Use only radial ply tires of the same size,
load range, and speed rating as your
original equipment tires.
Winter tires with the same speed rating as your
original equipment tires may not be available
for H, V, W, Y and ZR speed rated tires. If you
choose winter tires with a lower speed rating,
never exceed the tire’s maximum speed capability.
449

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.
(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.
Passenger (P-Metric) Tire
Light Truck (LT-Metric) Tire
453

If your vehicle has P255/50R20 104V size tires
installed on the rear axle, they will require
ination pressure adjustment when driving your
vehicle at speeds above 99 mph (160 km/h).
Set the cold ination pressure, for the rear tires
only, to the maximum ination pressure shown on
the tire sidewall, or 38 psi (262 kPa), whichever
is lower. See the example following. When you end
this high-speed driving, return the tires to the
cold tire ination pressure shown on the Tire and
Loading Information label. SeeLoading Your
Vehicle on page 356.
Example:
You will nd the maximum load and ination
pressure molded on the tire’s sidewall, in small
letters, near the rim ange. It will read something
like this: Maximum load 690 kg (1521 lbs)
300 kPa (44 psi) Max. Press.
For this example, you would set the
ination pressure for high-speed driving at
38 psi (262 kPa).The ination pressure for the front tires should be
set to the cold tire ination pressure shown on
the Tire and Loading Information label.
Racing or other competitive driving may affect the
warranty coverage of your vehicle. See your
warranty booklet for more information.
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) uses
radio and sensor technology to check tire pressure
levels. TPMS sensors are mounted on each tire
and wheel assembly, except the spare tire.
The TPMS sensors monitor the air pressure in
your vehicle’s tires and transmit tire pressure
readings to a receiver located in the vehicle.
The TPMS is designed to alert the driver if a low
tire pressure condition exists. If your vehicle
has the Driver Information Center (DIC) steering
wheel control buttons, tire pressure levels
may also be checked through the DIC. See “Tire
Pressures” underDIC Operation and Displays
on page 221.
459

Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver’s
responsibility to maintain correct tire pressure,
even if under-ination has not reached the level
to trigger illumination of the TPMS low tire
pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS
malfunction indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will ash for approximately
one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the
malfunction exists.
When the malfunction indicator is illuminated, the
system may not be able to detect or signal low
tire pressure as intended. TPMS malfunctions may
occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMSfrom functioning properly. Always check the TPMS
malfunction telltale after replacing one or more
tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow
the TPMS to continue to function properly.
The Tire and Loading Information label (tire
information placard) shows the size of your
vehicle’s original tires and the correct ination
pressure for your vehicle’s tires when they
are cold. SeeInation - Tire Pressure on
page 457. For the location of the tire and loading
information label, seeLoading Your Vehicle
on page 356.
Your vehicle’s TPMS can alert you about a low
tire pressure condition but it does not replace
normal tire maintenance. SeeTire Inspection and
Rotation on page 464andTires on page 448.
Notice:Do not use a tire sealant if your vehicle
has Tire Pressure Monitors. The liquid sealant
can damage the tire pressure monitor sensors.
461

{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 459.
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 356,
for more information about the Tire and Loading
Information Label.
467

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 466and
Accessories and Modications on page 386
for additional information.
468

Tire Chains
{CAUTION:
Do not use tire chains. 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
instructions. To help avoid damage to
your vehicle, drive slowly, re-adjust or
remove the device if it is contacting your
vehicle, and do not spin your wheels.
If you do nd traction devices that will t,
install them on the rear tires.
Accessory Inator
Your vehicle may have an accessory inator
system. You can inate things like basketballs and
bicycle tires. You can also use it to bring your tire
pressure up to the proper pressure. It is not
designed to inate large objects which will require
more than ve minutes to inate, such as an air
mattress.
The accessory inator is
located in the rear
compartment on
the driver’s side of the
vehicle behind an
access cover, near the
liftgate opening.
To remove the cover, push in on the tab to access
the inator.
You may have an air inator kit that is located in
the glove compartment. It includes a 22 ft (6.7 m)
hose with three nozzle adapters.
472