2007 PONTIAC GRAND PRIX spare tire
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Windshield Wiper Blade Replacement....... 399
Tires............................................................ 400
Tire Sidewall Labeling............................... 401
Tire Terminology and De nitions............... 405
In ation - Tire Pressure............................. 408
Tire Pressure Monitor System................... 409
Tire Inspection and Rotation...................... 414
When It Is Time for New Tires.................. 415
Buying New Tires...................................... 416
Different Size Tires and Wheels................ 417
Uniform Tire Quality Grading..................... 418
Wheel Alignment and Tire Balance............ 419
Wheel Replacement.................................. 419
Tire Chains............................................... 421
If a Tire Goes Flat.................................... 422
Tire In ator Kit (GXP)................................ 424
Changing a Flat Tire................................. 435
Removing the Spare Tire and Tools.......... 436
Removing the Flat Tire and Installing the
Spare Tire............................................. 438
Storing a Flat or Spare Tire and Tools...... 445
Compact Spare Tire.................................. 447Appearance Care........................................ 448
Cleaning the Inside of Your Vehicle.......... 448
Fabric/Carpet............................................. 449
Leather...................................................... 451
Ultra Lux Suede........................................ 451
Instrument Panel, Vinyl, and Other Plastic
Surfaces................................................ 452
Care of Safety Belts.................................. 452
Weatherstrips............................................ 452
Washing Your Vehicle............................... 453
Cleaning Exterior Lamps/Lenses................ 453
Finish Care............................................... 453
Windshield and Wiper Blades.................... 454
Aluminum Wheels...................................... 454
Tires......................................................... 455
Sheet Metal Damage................................. 455
Finish Damage.......................................... 456
Underbody Maintenance............................ 456
Chemical Paint Spotting............................ 456
Vehicle Care/Appearance Materials............ 457
Section 5 Service and Appearance Care
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Low-Pro le Performance Tire (GXP)
If your vehicle has P255/45R18 size tires on the
front wheels and P225/50R18 size tires on the rear
wheels, they are classi ed as low-pro le
performance tires. These tires are designed for
very responsive driving on wet or dry pavement.
You may also notice more road noise with
low-pro le performance tires and that they tend to
wear faster.
Notice:If your vehicle has low-pro le tires,
they are more susceptible to damage from road
hazards or curb impact than standard pro le
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 in ation pressure
and, when possible avoid contact with
curbs, potholes, and other road hazards.
Tire Sidewall Labeling
Useful information about a tire is molded into its
sidewall. The examples below show a typical
passenger vehicle tire and a compact spare tire
sidewall.
Passenger (P-Metric) Tire Example
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(A) Temporary Use Only:The compact spare
tire or temporary use tire has a tread life of
approximately 3,000 miles (5 000 km) and should
not be driven at speeds over 65 mph (105 km/h).
The compact spare tire is for emergency use when
a regular road tire has lost air and gone at. If
your vehicle has a compact spare tire, see
Compact Spare Tire on page 447andIf a Tire
Goes Flat on page 422.(B) Tire Ply Material:The type of cord and
number of plies in the sidewall and under
the tread.
(C) Tire Identi cation Number (TIN):The letters
and numbers following the DOT (Department of
Transportation) code is the Tire Identi cation
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 In ation Load
Limit:Maximum load that can be carried and
the maximum pressure needed to support
that load.
(E) Tire In ation:The temporary use tire or
compact spare tire should be in ated to 60 psi
(420 kPa). For more information on tire pressure
and in ation seeIn ation - Tire Pressure on
page 408.
(F) Tire Size:A combination of letters and
numbers de ne 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.
Compact Spare Tire Example
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In ation - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-in ation or over-in ation is all right. It is
not. If your tires do not have enough air
(under-in ation), you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air (over-in ation),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazardsA Tire and Loading Information label is attached to
the vehicle’s center pillar (B-pillar). This label
shows your vehicle’s original equipment tires and
the correct in ation pressures for your tires
when they are cold. The recommended cold tire
in ation pressure, shown on the label, is the
minimum amount of air pressure needed to
support your vehicle’s maximum load carrying
capacity.
For additional information regarding how much
weight your vehicle can carry, and an example of
the Tire and Loading Information label, see
Loading Your Vehicle on page 317. How you load
your vehicle affects vehicle handling and ride
comfort. Never load your vehicle with more weight
than it was designed to carry.
When to Check
Check your tires once a month or more. Do not
forget to check the compact spare tire, it should be
at 60 psi (420 kPa). For additional information
regarding the compact spare tire, seeCompact
Spare Tire on page 447.
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How to Check
Use a good quality pocket-type gage to check tire
pressure. You cannot tell if your tires are
properly in ated simply by looking at them. Radial
tires may look properly in ated even when they
are under-in ated. Check the tire’s in ation
pressure when the tires are cold. Cold means your
vehicle has been sitting for at least three hours
or driven no more than 1 mile (1.6 km).
Remove the valve cap from the tire valve stem.
Press the tire gage rmly onto the valve to
get a pressure measurement. If the cold tire
in ation pressure matches the recommended
pressure on the Tire and Loading Information
label, no further adjustment is necessary. If the
in ation pressure is low, add air until you reach the
recommended amount.
If you over ll the tire, release air by pushing on
the metal stem in the center of the tire valve.
Re-check the tire pressure with the tire gage.
Be sure to put the valve caps back on the valve
stems. They help prevent leaks by keeping out dirt
and moisture.
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) uses
radio and sensor technology to check tire pressure
levels. If your vehicle has this feature, sensors
are mounted onto each tire and wheel assembly,
except for 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.
When a low tire pressure condition is detected,
the TPMS will illuminate the low tire pressure
warning symbol on the instrument panel cluster,
and at the same time a warning message to check
the pressure in a speci c tire displays on the
Driver Information Center (DIC). The low
tire pressure warning light and the DIC warning
message CHECK TIRE PRESSURE come
on at each ignition cycle until the tires are in ated
to the correct in ation pressure.
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For additional information and details about the
DIC operation and displays seeDIC Controls and
Displays (Base Level DIC) on page 186orDIC
Controls and Displays (Uplevel DIC with Trip
Computer) on page 190andDIC Warnings and
Messages on page 200.
During cooler weather conditions, the low tire
pressure warning light and the DIC warning
message may come on when the vehicle is rst
started and then turn off as you start to drive. This
could be an early indicator that the tire pressures
are getting low and need to be in ated to the
proper pressure.
Each tire, including the spare (if provided), should
be checked monthly when cold and in ated to
the in ation pressure recommended by the vehicle
manufacturer on the vehicle placard or tire
in ation pressure label. (If your vehicle has tires of
a different size than the size indicated on the
vehicle placard or tire in ation pressure label, you
should determine the proper tire in ation
pressure for those tires.)As an added safety
feature, your vehicle
has been equipped with
a tire pressure
monitoring system
(TPMS) that illuminates
a low tire pressure
telltale when one
or more of your tires is
signi cantly
under-in ated.
Accordingly, when the low tire pressure telltale
illuminates, you should stop and check your tires as
soon as possible, and in ate them to the proper
pressure. Driving on a signi cantly under-in ated
tire causes the tire to overheat and can lead to tire
failure. Under-in ation also reduces fuel efficiency
and tire tread life, and may affect the vehicle’s
handling and stopping ability.
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-in ation has not reached the level to trigger
illumination of the TPMS low tire pressure telltale.
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6. Proceed to the passenger side front tire, and
repeat the procedure in Step 5.
7. Proceed to the passenger side rear tire, and
repeat the procedure in Step 5.
8. Proceed to the driver side rear tire, and
repeat the procedure in Step 5.
9. After hearing the con rming horn chirp for the
driver side rear tire, the horn chirps two more
times to signal the tire learning process
has ended. Turn the ignition switch to OFF.
10. Set all four tires to the recommended air
pressure level as indicated on the tire and
loading information label.
11. Put the valve caps back on the valve stems.
The spare tire does not have a TPMS sensor.
If you replace one of the road tires with the spare,
the SERVICE TIRE MONITOR SYSTEM
message will be displayed on the DIC. This
message should go off once you re-install the road
tire containing the TPMS sensor.Federal Communications Commission
(FCC) and Industry and Science
Canada
The Tire Pressure Monitor System (TPMS)
operates on a radio frequency and complies with
Part 15 of the FCC Rules. Operation is subject
to the following two conditions:
1. This device may not cause harmful
interference.
2. This device must accept any interference
received, including interference that may
cause undesired operation.
The Tire Pressure Monitor System (TPMS)
operates on a radio frequency and complies with
RSS-210 of Industry and Science Canada.
Operation is subject to the following two
conditions:
1. This device may not cause interference.
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Changes or modi cations to this system by other
than an authorized service facility could void
authorization to use this equipment.
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Tire Inspection and Rotation
Tire rotation is not recommended if your vehicle is
a GXP model equipped with P255/45R18 size
tires on the front wheels and P225/50R18 size tires
on the rear wheels. Different tire sizes front to
rear should not be rotated.
Tire rotation is recommended if the original
equipment tires installed on your vehicle are
of the same size and type on all four tire/wheel
positions. Original equipment tires of the
same size and type should be rotated every
5,000 to 8,000 miles (8 000 to 13 000 km).
Any time you notice unusual wear, rotate your
vehicle’s tires as soon as possible and check the
wheel alignment. Also check for damaged tires
or wheels. SeeWhen It Is Time for New Tires on
page 415andWheel Replacement on page 419
for more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The
rst rotation is the most important. SeeScheduled
Maintenance on page 473for scheduled rotation
intervals.The correct rotation pattern shown here is only for
non-GXP tires.
Do not include the compact spare tire, if equipped,
in your vehicle’s tire rotation.
After the tires have been rotated, adjust the front
and rear in ation pressures as shown on the Tire
and Loading Information label, and reset the Tire
Pressure Monitor System. SeeTire Pressure
Monitor System on page 409for additional
information.
Rotation Pattern for Non-GXP Tires Only
414