tire size CADILLAC XT6 2023 User Guide

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
410 Vehicle Care
Put the valve caps back on
the valve stems to keep out
dirt and moisture. Use only
valve caps designed for the
vehicle by GM. TPMS
sensors could be damaged
and would not be covered
by the vehicle warranty.
Tire Pressure for
High-Speed Operation
{Warning
Driving at high speeds,
160 km/h (100 mph) or
higher, puts additional strain
on tires. Sustained
high-speed driving causes
excessive heat buildup and
can cause sudden tire
failure. This could cause a(Continued)
Warning (Continued)
crash, and you or others
could be killed. Some
high-speed rated tires
require inflation pressure
adjustment for high-speed
operation. When speed
limits and road conditions
allow the vehicle to be
driven at high speeds, make
sure the tires are rated for
high-speed operation, are in
excellent condition, and are
set to the correct cold tire
inflation pressure for the
vehicle load. Vehicles with tire sizes listed
in the High Speed Operation
Inflation Pressures table
require inflation pressure
adjustment when driving the
vehicle at speeds of 160 km/h
(100 mph) or higher. Set the
cold tire inflation pressure to
the corresponding value in the
table for the tire size on the
vehicle.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 411
High Speed Operation Inflation Pressures
Tire Size Cold Inflation Pressure kPa (psi)
235/65R18 300 kPa (44 psi)
235/55R20 300 kPa (44 psi) 265/45R21 300 kPa (44 psi)
Return the tires to the
recommended cold tire
inflation pressure when
high-speed driving has ended.
See Vehicle Load Limits 0252
and Tire Pressure 0408.
Tire Pressure Monitor
System
The Tire Pressure Monitor
System (TPMS) uses radio and
sensor technology to check
tire pressure levels. The TPMS
sensors monitor the air
pressure in your tires and
transmit tire pressure
readings to a receiver located
in the vehicle. Each tire, including the spare
(if provided), should be
checked monthly when cold
and inflated to the inflation
pressure recommended by the
vehicle manufacturer on the
vehicle placard or tire inflation
pressure label. (If your vehicle
has tires of a different size
than the size indicated on the
vehicle placard or tire inflation
pressure label, you should
determine the proper tire
inflation 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 tirepressure telltale when one or
more of your tires is
significantly under-inflated.
Accordingly, when the low tire
pressure telltale illuminates,
you should stop and check
your tires as soon as possible,
and inflate them to the proper
pressure. Driving on a
significantly under-inflated tire
causes the tire to overheat
and can lead to tire failure.
Under-inflation also reduces
energy 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

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 413
the correct inflation pressure.
Using the DIC, tire pressure
levels can be viewed. For
additional information and
details about the DIC
operation and displays see
Driver Information Center
(DIC)0144.
The low tire pressure warning
light may come on in cool
weather when the vehicle is
first started, and then turn off
as the vehicle is driven. This
could be an early indicator
that the air pressure is getting
low and needs to be inflated to
the proper pressure.
A Tire and Loading
Information label, attached to
your vehicle, shows the size of
the original equipment tires
and the correct inflation
pressure for the tires when
they are cold. See Vehicle
Load Limits 0252, for an
example of the Tire and
Loading Information label and
its location. Also see Tire
Pressure 0408. The TPMS can warn about a
low tire pressure condition but
it does not replace normal tire
maintenance. See Tire
Inspection
0416, Tire Rotation
0 417, and Tires 0400.
Caution
Tire sealant materials are
not all the same.
A non-approved tire sealant
could damage the TPMS
sensors. TPMS sensor
damage caused by using an
incorrect tire sealant is not
covered by the vehicle
warranty. Always use only
the GM approved tire
sealant available through
your dealer or included in
the vehicle.
TPMS Malfunction Light
and Message
The TPMS will not function
properly if one or more of the
TPMS sensors are missing or
inoperable. When the system
detects a malfunction, the low tire pressure warning light
flashes for about one minute
and then stays on for the
remainder of the ignition cycle.
A DIC warning message also
displays. The malfunction light
and DIC warning message
come on at each ignition cycle
until the problem is corrected.
Some of the conditions that
can cause these to come
on are:
.One of the road tires has
been replaced with the
spare tire. The spare tire
does not have a TPMS
sensor. The malfunction light
and DIC message should go
off after the road tire is
replaced and the sensor
matching process is
performed successfully. See
“TPMS Sensor Matching
Process”
later in this section.
.The TPMS sensor matching
process was not done or not
completed successfully after
rotating the tires. The
malfunction light and the DIC
message should go off after

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 417
.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.
Tire Rotation
Tires should be rotated
according to the interval
specified in the
Maintenance Schedule. See
Maintenance Schedule
0454.
Tires are rotated to
achieve a more uniform
wear for all tires. The first
rotation is the most
important. Anytime unusual wear is
noticed, rotate the tires as
soon as possible, check for
proper tire inflation
pressure, and check for
damaged tires or wheels.
If the unusual wear
continues after the
rotation, check the wheel
alignment. See When It Is
Time for New Tires
0418
and Wheel Replacement
0 423.
Use this rotation pattern
when rotating the tires. Do not include the compact
spare tire in the tire
rotation.
Adjust the front and rear
tires to the recommended
inflation pressure on the
Tire and Loading
Information label after the
tires have been rotated.
See Tire Pressure
0408
and Vehicle Load Limits
0 252.
Reset the Tire Pressure
Monitor System. See Tire
Pressure Monitor
Operation 0412.
Check that all wheel nuts
are properly tightened.
See “Wheel Nut Torque”
under Capacities and
Specifications 0463, and
“Removing the Flat Tire and
Installing the Spare Tire”
under Tire Changing 0426.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 419
GM recommends that tires,
including the spare if
equipped, be replaced after six
years, regardless of tread
wear. To identify the age of a
tire, use the tire manufacture
date, which is the last four
digits of the DOT Tire
Identification Number (TIN)
molded into one side of the
tire sidewall. The last four
digits of the TIN indicate the
tire manufactured date. The
first two digits represent the
week and the last two digits,
the year. For example, the
third week of the year 2020
would have a 4-digit DOT date
of 0320. Week 01 is the first
full week (Sunday through
Saturday) of each year.
Vehicle Storage
Tires age when stored
normally mounted on a parked
vehicle. Park a vehicle that will
be stored for at least a month
in a cool, dry, clean area away
from direct sunlight to slow
aging. This area should be freeof grease, gasoline, or other
substances that can
deteriorate rubber.
Parking for an extended
period can cause flat spots on
the tires that may result in
vibrations while driving. When
storing a vehicle for at least a
month, remove the tires or
raise the vehicle to reduce the
weight from the tires.
Buying New Tires
GM has developed and
matched specific tires for
the vehicle. The original
equipment tires installed
were designed to meet
General Motors Tire
Performance Criteria
Specification (TPC Spec)
system rating. When
replacement tires are
needed, GM strongly
recommends buying tires
with the same TPC Spec
rating.
GM's exclusive TPC Spec
system considers over a
dozen critical specifications
that impact the overall
performance of the 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 near the tire size.
If the tires have an
all-season tread design, the
TPC Spec number will be
followed by MS for mud
and snow. See Tire
Sidewall Labeling
0402 for
additional information.
GM recommends replacing
worn tires in complete sets
of four. Uniform tread
depth on all tires will help
to maintain the
performance of the vehicle.
Braking and handling

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
420 Vehicle Care
performance may be
adversely affected if all the
tires are not replaced at
the same time. If proper
rotation and maintenance
have been done, all four
tires should wear out at
about the same time.
However, if it is necessary
to replace only one axle set
of worn tires, place the
new tires on the rear axle.
See Tire Rotation0417.
{Warning
Tires could explode
during improper service.
Attempting to mount or
dismount a tire could
cause injury or death.
Only your dealer or
authorized tire service
center should mount or
dismount the tires.
{Warning
Mixing tires of different
sizes (other than those
originally installed on the
vehicle), brands, tread
patterns, or types may
cause loss of vehicle
control, resulting in a
crash or other vehicle
damage. Use the correct
size, brand, and type of
tire on all wheels.
{Warning
Using bias-ply tires on
the vehicle may cause the
wheel rim flanges to
develop cracks after
many miles of driving.
A tire and/or wheel could
fail suddenly and cause a
crash. Use only radial-ply
tires with the wheels on
the vehicle. Winter tires with the same
speed rating as the original
equipment tires may not be
available for H, V, W, Y and
ZR speed rated tires. Never
exceed the winter tires’
maximum speed capability
when using winter tires
with a lower speed rating.
If the vehicle tires must be
replaced with a tire that
does not have a TPC Spec
number, make sure they
are the same size, load
range, speed rating, and
construction (radial) as the
original tires.
The Tire and Loading
Information label indicates
the original equipment tires
on the vehicle. See Vehicle
Load Limits
0252.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 421
Different Size Tires
and Wheels
If wheels or tires are installed
that are a different size than
the original equipment wheels
and tires, vehicle performance,
including its braking, ride and
handling characteristics,
stability, and resistance to
rollover may be affected. If the
vehicle has electronic systems
such as antilock brakes,
rollover airbags, traction
control, electronic stability
control, or All-Wheel Drive, the
performance of these systems
can also be affected.
{Warning
If different sized wheels are
used, there may not be an
acceptable level of
performance and safety if
tires not recommended for
those wheels are selected.
This increases the chance of
a crash and serious injury.(Continued)
Warning (Continued)
Only use GM specific wheel
and tire systems developed
for the vehicle, and have
them properly installed by a
GM certified technician.
See Buying New Tires 0419
and Accessories and
Modifications 0363.
Uniform Tire Quality
Grading
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 tires, compact
spare tires, tires with
nominal rim diameters of
10 to 12 inches
(25 to 30 cm), or to some
limited-production tires.
While the tires available on
General Motors passenger
cars and light trucks may
vary with respect to these
grades, they must also
conform to federal safety
requirements and
additional General Motors
Tire Performance Criteria
(TPC) standards.
Quality grades can be
found where applicable on
the tire sidewall between
tread shoulder and
maximum section width.
For example:

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
424 Vehicle Care
Warning (Continued)
When replacing wheels, use
a new GM original
equipment wheel.
Caution
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.
Tire Chains
{Warning
If the vehicle has 265/45R21
size tires, do not use tire
chains. There is not enough
clearance. Tire chains used
on a vehicle without the
proper amount of clearance(Continued)
Warning (Continued)
can cause damage to the
brakes, suspension, or other
vehicle parts. The area
damaged by the tire chains
could cause loss of control
and a crash. Use another
type of traction device only
if its manufacturer
recommends it for the
vehicle's tire size
combination and road
conditions. Follow that
manufacturer's instructions.
To avoid vehicle damage,
drive slow and readjust or
remove the traction device if
it contacts the vehicle. Do
not spin the wheels. If
traction devices are used,
install them on the front
tires.
Caution
If the vehicle is equipped
with a tire size other than
265/45R21, use tire chains
only where legal and only
when necessary. Use low
profile chains that add no
more than 12 mm thickness
to the tire tread and inner
sidewall. Use chains that are
the proper size for the tires.
Install them on the tires of
the front axle. Do not use
chains on the tires of the
rear axle. Tighten them as
tightly as possible with the
ends securely fastened.
Drive slowly and follow the
chain manufacturer's
instructions. If the chains
contact the 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 the vehicle.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 433
The compact spare is for
temporary use only. Replace
the compact spare tire with a
full-size tire as soon as
possible.
Storing the Compact
Spare Tire and Tools
To store the spare tire and
tools:1. Open the liftgate. See Liftgate 025.
2. Lift the load floor.
3. Remove the cargo management system tray.
4. Put back the spare tire and all tools as they were
stored in the rear storage
compartment.
5. Install the cargo management system tray
and load floor.
The compact spare is for
temporary use only. Replace
the compact spare tire with a
full-size tire as soon as
possible.
Compact Spare Tire
{Warning
Driving with more than one
compact spare tire at a time
could result in loss of
braking and handling. This
could lead to a crash and
you or others could be
injured. Use only one
compact spare tire at a time.
If this vehicle has a compact
spare tire, it was fully inflated
when new; however, it can
lose air over time. Check the
inflation pressure regularly.
It should be 420 kPa (60 psi).
Stop as soon as possible and
check that the spare tire is
correctly inflated after being
installed on the vehicle. The
compact spare tire is designed
for temporary use only. The
vehicle will perform differently
with the spare tire installed
and it is recommended that
the vehicle speed be limited to
80 km/h (50 mph). To conserve the tread of the spare tire,
have the standard tire
repaired or replaced as soon
as convenient and return the
spare tire to the storage area.
When using a compact spare
tire, the AWD (if equipped),
ABS, and Traction Control
systems may engage until the
spare tire is recognized by the
vehicle, especially on slippery
roads. Adjust driving to reduce
possible wheel slip.
Caution
When the compact spare is
installed, do not take the
vehicle through an
automatic car wash with
guide rails. The compact
spare can get caught on the
rails which can damage the
tire, wheel, and other parts
of the vehicle.
Do not use the compact spare
on other vehicles.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
INDEX 503
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Super Cruise . . . . . . . . . . . . . . . . . . 294
Surround VideoRecorder . . . . . . . . . . . . . . . . . . . . . . 341
Surround Vision System . . . 315
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Navigation . . . . . . . . . . . . . . . . . . . . 184
System Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Driver Assistance . . . . . . . . . . 312
Engine Air Filter Life . . . . . . 374
Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . 326
Global Positioning . . . . . . . . . . 192
Infotainment . . . . . . . . . . . . . . . . . 481
Night Vision . . . . . . . . . . . . . . . . . 333
Rear Cross Traffic Alert . . . . . . . . . . . . . . . . . . . . . . . . . 325
Roof Rack . . . . . . . . . . . . . . . . . . . . . 114
Surround Vision . . . . . . . . . . . . . 315
T
Tachometer . . . . . . . . . . . . . . . . . . . . 130
Teen Driver . . . . . . . . . . . . . . . . . . . . . 214
Text Telephone (TTY) Users . . . . . . . . . . . . . . . . . . . . . . . . . . 469
Theft-Deterrent Systems . . . . . . . . . . . . . . . . . . . . . . . . 35 Theft-Deterrent
Systems (cont'd)
Immobilizer . . . . . . . . . . . . . . . . . . . . 35
Third Row Seats . . . . . . . . . . . . . . . 59
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 All-Season . . . . . . . . . . . . . . . . . . . . 401
Buying New Tires . . . . . . . . . . . 419
Chains . . . . . . . . . . . . . . . . . . . . . . . . 424
Changing . . . . . . . . . . . . . . . . . . . . . 426
Compact Spare . . . . . . . . . . . . 433
Designations . . . . . . . . . . . . . . . . 405
Different Size . . . . . . . . . . . . . . . . 421
If a Tire Goes Flat . . . . . . . . . 425
Inspection . . . . . . . . . . . . . . . . . . . . 416
Pressure . . . . . . . . . . . . . . . 408, 410
Pressure Light . . . . . . . . . . . . . . 141
Pressure MonitorOperation . . . . . . . . . . . . . . . . . . . 412
Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . . 411
Rotation . . . . . . . . . . . . . . . . . . . . . . . 417
Sidewall Labeling . . . . . . . . . . 402
Terminology and
Definitions . . . . . . . . . . . . . . . . . 405
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . . 421 Tires (cont'd)
Wheel Alignment and
Tire Balance . . . . . . . . . . . . . . . 423
Wheel Replacement . . . . . . 423
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . 418
Winter . . . . . . . . . . . . . . . . . . . . . . . . 402
Top Tier Fuel . . . . . . . . . . . . . . . . . 342
Towing DrivingCharacteristics . . . . . . . . . . . 347
Equipment . . . . . . . . . . . . . . . . . . . 356
General Information . . . . . . 347
Recreational Vehicle . . . . . 438
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . 351
Trailer Sway
Control (TSC) . . . . . . . . . . . . . 359
Traction Control System(TCS)/StabiliTrak
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Control/Electronic Stability Control . . . . . . . . . . . 276
Off Light . . . . . . . . . . . . . . . . . . . . . . 140
Trademarks and License Agreements . . . . . . . 219
Trailer Sway Control (TSC) . . . . . . . 359