2007 CADILLAC CTS V spare tire

The high-performance tires, size P225/55R16,
P225/50R17 or P225/50R18 require ination
pressure adjustment when driving your vehicle at
speeds of 100 mph (160 km/h) or higher. Set
the cold tire ination pressure to the maximum
ination pressure shown on the tire sidewall,
or 38 psi (262 kPa), whichever is lower. See the
example following.
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 710 kg (1565 lbs)
350 kPa (51 psi) Max. Press.
For this example, you would set the cold ination
pressure for high-speed driving at 38 psi (262 kPa)
When you end high-speed driving, return the tires
to the cold ination pressures shown on the
tire and loading information label. SeeLoading
Your Vehicle on page 321.Tire Pressure Monitor System
Your vehicle may have a Tire Pressure Monitor
System (TPMS). This system uses radio and
sensor technology to check tire pressure levels.
If your vehicle has this feature, sensors are
mounted on each the tire and wheel assembly,
except for the spare tire. The TPMS sensors
monitor the air pressure in the vehicle’s tires and
transmits the tire pressure readings to a receiver
located in the vehicle.
If your vehicle has the base audio system, the
Driver Information Center (DIC) displays TPMS
warnings and messages on the radio’s display
screen. SeeSystem Controls on page 223
andDIC Warnings and Messages on page 232for
additional information and details about the DIC
operation and displays. If your vehicle has
the Navigation system, TPMS warnings and
messages are displayed on the message center
screen, located inside the tachometer. See
Message Center (CTS-V) on page 215for
information about the message center operation
and displays.
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If a low tire pressure condition is detected, the
TPMS will display the Check Tire Pressure
message on the DIC or message center and, at the
same time, illuminate the low tire pressure warning
symbol on the instrument panel cluster.
Each tire, including the spare (if provided), should
be checked monthly when cold and inated to the
ination pressure recommended by the vehicle
manufacturer on the vehicle placard or tire ination
pressure label. (If your vehicle has tires of a
different size than the size indicated on the vehicle
placard or tire ination pressure label, you should
determine the proper tire ination 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 signicantly
under-inated.Accordingly, when the low tire pressure telltale
illuminates, you should stop and check your tires
as soon as possible, and inate them to the
proper pressure. Driving on a signicantly
under-inated tire causes the tire to overheat and
can lead to the tire failure. Under-ination 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-ination has not reached the level to
trigger illumination of the TPMS low tire pressure
telltale.
The Tire and Loading Information label shows the
size of your vehicle’s original tires and their
recommended cold ination pressures. See
Loading Your Vehicle on page 321, for the location
of the tire and loading information label. Also
seeInation - Tire Pressure on page 402.
The tire pressure warning light may come on in
cool weather 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 inated to the
proper pressure.
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6. Remove the valve cap from the valve stem.
Activate the TPMS sensor by increasing
or decreasing the tire’s air pressure for
ve seconds, or until a horn chirp sounds. The
horn chirp, which may take up to 30 seconds,
conrms that the sensor identication code has
been matched to this tire position. To decrease
the tire’s air-pressure use the pointed end of
the valve cap, a pencil-style air pressure gage,
or a key.
7. Proceed to the passenger’s side front tire, and
repeat the procedure in Step 6.
8. Proceed to the passenger’s side rear tire, and
repeat the procedure in Step 6.
9. Proceed to the driver’s side rear tire, and
repeat the procedure in Step 6.
10. After hearing the conrming double horn
chirp, for the left rear tire, exit the matching
process by turning the ignition switch to OFF.
11. Set all four tires to the recommended
air pressure level as indicated on the tire and
loading information label.
12. Put the valve caps back on the valve stems.The TPMS will not function properly, if one or
more of the TPMS sensors are missing or
inoperable. If your vehicle has a compact spare
tire, the spare tire and wheel assembly does
not contain a TPMS sensor. If you replace one of
the road tires with the spare, or if the system
detects a missing or inoperable sensor, the
Service Tire Monitor System message will be
displayed on the DIC. If you have replaced a tire
and wheel assembly without transferring the
TPMS sensors, the error message will be
displayed. Once you re-install the TPMS sensors,
the message should go off. See your GM
dealer for service if all TPMS sensors are installed
and the error message comes on and stays on.
Have your vehicle serviced as soon as possible.
If your vehicle has a message center and the
system detects a missing or inoperable sensor an
error message of several dashes–––will be
shown on the message center display. If you have
replaced a tire and wheel assembly without
transferring the TPMS sensors, the error message
will be displayed. Once you re-install the TPMS
sensors, the error message should go off.
See your GM dealer for service if all TPMS
sensors are installed and the error message
comes on and stays on.
408

When rotating your vehicle’s tires, always use the
correct rotation pattern shown here.
If your vehicle has a compact spare tire, do not
include it in the tire rotation.
After the tires have been rotated, adjust the front
and rear ination pressures as shown on the Tire
and Loading Information label. SeeLoading Your
Vehicle on page 321, for an example of the tire and
loading information label and its location on your
vehicle.
If your vehicle has the Tire Pressure Monitor
System (TPMS) the TPMS sensors will need to be
reset and matched to the tire/wheel position. A
special TPMS diagnostic tool is used to reset the
sensor identication codes. See your dealer for
service.Make certain that all wheel nuts are properly
tightened. See “Wheel Nut Torque” under
Capacities and Specications on page 457.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after time. The wheel could
come off and cause an accident. When
you change a wheel, remove any rust or
dirt from places where the wheel attaches
to the vehicle. In an emergency, you can
use a cloth or a paper towel to do this;
but be sure to use a scraper or wire brush
later, if needed, to get all the rust or dirt
off. SeeChanging a Flat Tire (CTS Only)
on page 424.
410

TPC Spec code has not been molded onto the
tire’s sidewall. If your vehicle has these tires, and
you need to replace them, you can still get
these TPC Spec rated tires by asking your
GM dealer. Your GM dealer can order these tires
by part number. This way, your vehicle will
continue to give the proper endurance, handling,
traction, and ride as the original tires.
Winter tires with the same speed rating as your
vehicle’s original equipment tires may not be
available for H, V, W, and ZR speed rated tires.
If you choose snow tires with a lower speed rating,
never exceed the tire’s maximum speed capability.
{CAUTION:
Mixing tires could cause you to lose
control of your vehicle 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 all wheels.
Your vehicle may have a compact spare
tire and wheel assembly. It is all right to
drive with your vehicle’s compact spare
tire temporarily. It was developed for use
on your vehicle. SeeCompact Spare Tire
(CTS Only) on page 434.
412

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 411and
Accessories and Modications on page 332for
additional information.
Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration (NHTSA), which
grades tires by treadwear, traction, and
temperature performance. This applies only to
vehicles sold in the United States. The grades are
molded on the sidewalls of most passenger car
tires. The Uniform Tire Quality Grading (UTQG)
system does not apply to deep tread, winter-type
snow tires, space-saver, or temporary use
spare tires, tires with nominal rim diameters of
10 to 12 inches (25 to 30 cm), or to some
limited-production tires.
414

If a Tire Goes Flat
It is unusual for a tire to “blowout” while you are
driving, especially if you maintain your tires
properly. SeeTires on page 392. 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.
A rear blowout, particularly on a curve, acts much
like a skid and may require the same correction
you’d use in a skid. In any rear blowout, remove
your foot from the accelerator pedal. Get the
vehicle under control by steering the way you want
the vehicle to go. It may be very bumpy and
noisy, but you can still steer. Gently brake to a
stop — well off the road if possible.If a tire goes at, and your vehicle has a spare
tire, seeChanging a Flat Tire (CTS Only) on
page 424. This information shows you how to use
your vehicle’s tire changing equipment and
how to change a at tire safely.
{CAUTION:
Lifting a vehicle and getting under it to do
maintenance or repairs is dangerous
without the appropriate safety equipment
and training. The jack provided with your
vehicle is designed only for changing a
at tire. If it is used for anything else, you
or others could be badly injured or killed
if the vehicle slips off the jack. Use the
jack provided with your vehicle only for
changing a at tire.
422

Run-Flat Tires (CTS-V)
If your vehicle has run-at tires, there is no spare
tire and no tire changing equipment. Run-at
tires can operate effectively with no air pressure
for a limited distance and speed. Your vehicle also
has a Tire Pressure Monitor (TPM) which will
alert you if there is a loss of tire pressure in any of
the tires. These tires perform so well without
any air pressure that a Tire Pressure Monitor
(TPM) is used to alert you when there is a low tire
condition.
{CAUTION:
When the low tire warning light is
displayed on the instrument panel cluster,
your vehicle’s handling capabilities will
be reduced during severe maneuvers.
If you drive too fast, you could lose control
of your vehicle. You or others could be
injured. Do not drive over 55 mph (90 km/h)
CAUTION: (Continued)
CAUTION: (Continued)
when the low tire warning light is
displayed. Drive cautiously and check
your tire pressures as soon as you can.
SeeRun-Flat Tires (CTS-V) on page 400and
Tire Pressure Monitor System on page 405,
for additional information.
{CAUTION:
Special tools and procedures are required
to service a run-at tire. If these special
tools and procedures are not used you or
others could be injured and your vehicle
could be damaged. Always be sure the
proper tools and procedures, as described
in the service manual, are used.
To order a service manual seeService
Publications Ordering Information on page 501.
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