tire size CADILLAC CT6 2016 User Guide

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
310 Vehicle Care shown on the Tire and Loading
Information label. See Vehicle Load
Limits 0 198 .
A message to check the pressure in
a specific tire displays in the Driver
Information Center (DIC). The low
tire pressure warning light and the
DIC warning message come on at
each ignition cycle until the tires are
inflated to 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) 0 140 .
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 0 198 for an example of the
Tire and Loading Information label
and its location. Also see Tire
Pressure 0 306 .
The TPMS can warn about a low
tire pressure condition but it does
not replace normal tire
maintenance. See Tire Inspection
0 312 , Tire Rotation 0 313 ,
and Tires 0 299 .
CautionTire 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 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
312 Vehicle Care through the Settings menu.
See Driver Information Center
(DIC) 0 140 .
4. Use the five-way DIC control
on the right side of the steering
wheel to scroll to the Tire
Pressure screen under the DIC
info page. See Driver
Information Center (DIC) 0 140 .
5. Press and hold SEL in the
center of the five-way DIC
control.
The horn sounds twice to
signal the receiver is in relearn
mode and the TIRE
LEARNING ACTIVE message
displays on the DIC screen.
6. Start with the driver side
front tire.
7. Place the relearn tool against
the tire sidewall, near the valve
stem. Then press the button to
activate the TPMS sensor.
A horn chirp confirms that the
sensor identification code has
been matched to this tire and
wheel position. 8. Proceed to the passenger side
front tire, and repeat the
procedure in Step 7.
9. Proceed to the passenger side
rear tire, and repeat the
procedure in Step 7.
10. Proceed to the driver side rear
tire, and repeat the procedure
in Step 7. The horn sounds two
times to indicate the sensor
identification code has been
matched to the driver side rear
tire, and the TPMS sensor
matching process is no longer
active. The TIRE LEARNING
ACTIVE message on the DIC
display screen goes off.
11. Press ENGINE START/STOP
to turn the ignition off.
12. Set all four tires to the
recommended air pressure
level as indicated on the Tire
and Loading Information label. Tire Inspection We recommend that the tires,
including the spare tire, if the
vehicle has one, be inspected
for signs of wear or damage at
least once a month.
Replace the tire if: .
The indicators at three or
more places around the tire
can be seen. .
There is 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Vehicle Care 313
Tire Rotation Tires should be rotated every
12 000 km/7,500 mi. See
Maintenance Schedule 0 344 .
Tires are rotated to achieve a
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 0 314
and Wheel Replacement 0 318 . Use this rotation pattern if the
vehicle has different size tires
on the front and rear.
Different tire sizes should not be
rotated front to rear. Use this rotation pattern when
rotating tires of the same size
installed on all four wheel
positions.
If the vehicle has a compact
spare tire, do not include it 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 0 306
and Vehicle Load Limits 0 198 .

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Vehicle Care 315slow aging. This area should be free
of 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 0 301 , 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
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. See Tire
Rotation 0 313 for information on proper tire rotation. However,
if it is necessary to replace only
one axle set of worn tires, place
the new tires on the rear axle.
Winter tires with the same speed
rating as the original equipment
tires may not be available for H,
V, W, and ZR speed rated tires.
Never exceed the winter tire's
maximum speed capability when
using winter tires with a lower
speed rating.
{ 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
316 Vehicle Care
{ WarningMixing tires of different sizes
(other than those originally
installed on the vehicle), brands,
or types may cause loss of
control of the vehicle, resulting in
a crash or other vehicle damage.
Use the correct size, brand, and
type of tire on all four 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.
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.
Vehicles that have a tire
pressure monitoring system
could give an inaccurate
low-pressure warning if non-TPC
Spec rated tires are installed.
See Tire Pressure Monitor
Operation 0 309 .
The Tire and Loading
Information label indicates the
original equipment tires on the
vehicle. See Vehicle Load
Limits 0 198 .
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, roll bars, traction control, electronic stability
control, or All-Wheel Drive, the
performance of these systems can
also be affected.
{ WarningIf 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. 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 0 315 and
Accessories and
Modifications 0 262 .
Uniform Tire Quality
Grading The following information relates
to the system developed by the
United States National Highway

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Vehicle Care 319CautionThe 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.
Used Replacement Wheels
{ WarningReplacing a wheel with a used
one is dangerous. How it has
been used or how far it has been
driven may be unknown. It could
fail suddenly and cause a crash.
When replacing wheels, use a
new GM original equipment
wheel. Tire Chains
{ WarningIf the vehicle has 265/45R18 size
tires on the rear axle, 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 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 rear tires. CautionIf the vehicle is equipped with a
tire size other than 265/45R18,
use tire chains only where legal
and only when necessary. Use
low profile chains that add no
more than 10 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 rear axle. Do not 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 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 CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
326 Vehicle Care
5. Route the loop end of the
strap (3) through one of the
cargo tie-downs (1) in the rear
of the vehicle.
6. Route the hook (2) through the
loop (3).
7. Pull the strap to tighten it
around the cargo tie-down (1). 8. Route the hook end of the
strap through the wheel.
9. Attach the hook to the cargo
tie-down in the rear of the
vehicle.
10. Tighten the strap.
The compact spare is for temporary
use only. Replace the compact
spare tire with a full-size tire as
soon as you can. Compact Spare Tire
{ WarningDriving 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

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
346 Service and Maintenance Maintenance Schedule
Additional Required
Services - Normal
12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 miRotate tires, if recommended for the vehicle, and
perform Required Services. Check engine oil level
and oil life percentage. Change engine oil and
filter, if needed. (1)
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @Replace passenger compartment air filter. (2)
@ @ @ @ @ @Inspect evaporative control system. (3)
@ @ @Replace engine air cleaner filter. (4)
@ @ @Replace spark plugs. Inspect spark plug wires.
(2.0L and 3.0L Twin Turbo Engines)
@ @Replace spark plugs. Inspect spark plug wires.
(3.6L Engine Only)
@Drain and fill engine cooling system. (5)
@Change transfer case fluid, if equipped with
AWD. (6)
@Visually inspect accessory drive belts. (7)
@Replace brake fluid. (8)
Footnotes — Maintenance
Schedule Additional Required
Services - Normal
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation 0 313 . (2) Or every two years, whichever
comes first. More frequent
passenger compartment air filter
replacement may be needed if
driving in areas with heavy traffic,
poor air quality, high dust levels,
or environmental allergens. Passenger compartment air filter
replacement may also be needed if
there is reduced airflow, window
fogging, or odors. Your GM dealer
can help determine when to replace
the filter.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Service and Maintenance 349Footnotes — Maintenance
Schedule Additional Required
Services - Severe
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation 0 313 .
(2) Or every two years, whichever
comes first. More frequent
passenger compartment air filter
replacement may be needed if
driving in areas with heavy traffic,
poor air quality, high dust levels,
or environmental allergens.
Passenger compartment air filter
replacement may also be needed if
there is reduced airflow, window
fogging, or odors. Your GM dealer
can help determine when to replace
the filter.
(3) Check all fuel and vapor lines
and hoses for proper hook-up,
routing, and condition.
(4) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed. (5) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water
can overcome the seals and
contaminate the transfer case fluid.
Contaminated fluid will decrease the
life of the transfer case and/or axles
and should be replaced.
(6) Or every five years, whichever
comes first. See Cooling
System 0 275 .
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.
(8) Replace brake fluid every five
years. See Brake Fluid 0 283 .Special Application
Services .
Severe Commercial Use
Vehicles Only: Lubricate chassis
components every 5 000 km/
3,000 mi.
.
Have underbody flushing service
performed. See "Underbody
Maintenance" in Exterior
Care 0 333 .

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
394 Index Shift Lock Control Function
Check, Automatic
Transmission . . . . . . . . . . . . . . . . . . 285
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . . 207
Out of Park . . . . . . . . . . . . . . . . . . . 208
Side Blind Zone Alert (SBZA) . . . 246
Signals, Turn and
Lane-Change . . . . . . . . . . . . . . . . . 173
Spare Tire
Compact . . . . . . . . . . . . . . . . . . . . . . 326
Special Application Services . . . . 349
Specifications and
Capacities . . . . . . . . . . . . . . . . . . . . . 358
Speedometer . . . . . . . . . . . . . . . . . . . 123
StabiliTrak
OFF Light . . . . . . . . . . . . . . . . . . . . . 136
Start Assist, Hills . . . . . . . . . . . . . . . 216
Start Vehicle, Remote . . . . . . . . . . . 36
Starter Switch Check . . . . . . . . . . . 285
Starting the Engine . . . . . . . . . . . . . 204
Starting the Vehicle
Messages . . . . . . . . . . . . . . . . . . . . . 156
Steering . . . . . . . . . . . . . . . . . . . . . . . . 194
Heated Wheel . . . . . . . . . . . . . . . . . 111
Wheel Adjustment . . . . . . . . . . . . .110
Wheel Controls . . . . . . . . . . . . . . . . 111
Steering System Messages . . . . . 155 Storage
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Storage Areas
Armrest . . . . . . . . . . . . . . . . . . . . . . . 107
Center Console . . . . . . . . . . . . . . . 107
Convenience Net . . . . . . . . . . . . . 108
Glove Box . . . . . . . . . . . . . . . . . . . . 106
Instrument Panel . . . . . . . . . . . . . 106
Storage Compartments . . . . . . . . . 106
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 198
Summer Tires . . . . . . . . . . . . . . . . . . 301
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 54
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Sunshade
Rear Window . . . . . . . . . . . . . . . . . . . 54
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System
Forward Collision
Alert (FCA) . . . . . . . . . . . . . . . . . . 237
Infotainment . . . . . . . . . . . . . 177, 374
Night Vision . . . . . . . . . . . . . . . . . . 243
Systems
Driver Assistance . . . . . . . . . . . . . 230
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 124
Text Telephone (TTY) Users . . . . 364
Theft-Deterrent Systems . . . . . . . . . 46 Theft-Deterrent Systems (cont'd)
Immobilizer . . . . . . . . . . . . . . . . . . . . . 46
Thigh Support Adjustment . . . . . . . 61
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
All-Season . . . . . . . . . . . . . . . . . . . . 300
Buying New Tires . . . . . . . . . . . . . 315
Chains . . . . . . . . . . . . . . . . . . . . . . . . 319
Changing . . . . . . . . . . . . . . . . . . . . . 321
Compact Spare . . . . . . . . . . . . . . . 326
Designations . . . . . . . . . . . . . . . . . 303
Different Size . . . . . . . . . . . . . . . . . 316
If a Tire Goes Flat . . . . . . . . . . . . 320
Inspection . . . . . . . . . . . . . . . . . . . . 312
Low Profile . . . . . . . . . . . . . . . . . . . 300
Messages . . . . . . . . . . . . . . . . . . . . 156
Pressure . . . . . . . . . . . . . . . . . . . . . . 308
Pressure Light . . . . . . . . . . . . . . . . 137
Pressure Monitor Operation . . 309
Pressure Monitor System . . . . . 308
Rotation . . . . . . . . . . . . . . . . . . . . . . 313
Sidewall Labeling . . . . . . . . . . . . . 301
Terminology and Definitions . . 304
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 316
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . . . 318
Wheel Replacement . . . . . . . . . . 318