2019 CADILLAC CT6 warning light

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
VEHICLE CARE 351
dealer for service if the TPMS
malfunction light and DIC message
come on and stay on.
Tire Fill Alert (If Equipped)
This feature provides visual and
audible alerts outside the vehicle to
help when inflating an underinflated
tire to the recommended cold tire
pressure.
When the low tire pressure warning
light comes on:1. Park the vehicle in a safe, level place.
2. Set the parking brake firmly.
3. Place the vehicle in P (Park).
4. Add air to the tire that is underinflated. The turn signal
lamp will flash.
When the recommended
pressure is reached, the horn
sounds once and the turn signal
lamp will stop flashing and
briefly turn solid. Repeat these steps for all
underinflated tires that have
illuminated the low tire pressure
warning light.{Warning
Overinflating a tire could cause the
tire to rupture and you or others
could be injured. Do not exceed the
maximum pressure listed on the
tire sidewall. See
Tire Sidewall
Labeling 0341 and
Vehicle Load Limits 0197.
If the tire is overinflated by more than
35 kPa (5 psi), the horn will sound
multiple times and the turn signal
lamp will continue to flash for several
seconds after filling stops. To release
and correct the pressure, while the
turn signal lamp is still flashing,
briefly press the center of the valve
stem. When the recommended
pressure is reached, the horn
sounds once. If the turn signal lamp does not flash
within 15 seconds after starting to
inflate the tire, the tire fill alert has
not been activated or is not working.
If the hazard warning flashers are on,
the tire fill alert visual feedback will
not work properly.
The TPMS will not activate the tire fill
alert properly under the following
conditions:
.
There is interference from an
external device or transmitter.
. The air pressure from the inflation
device is not sufficient to inflate
the tire.
. There is a malfunction in
the TPMS.
. There is a malfunction in the horn
or turn signal lamps.
. The identification code of the
TPMS sensor is not registered to
the system.
. The battery of the TPMS sensor
is low.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
354 VEHICLE CARE
Reset the Tire Pressure Monitor
System. SeeTire Pressure Monitor
Operation 0349.
Check that all wheel nuts are
properly tightened. See “Wheel
Nut Torque ”under Capacities and
Specifications 0397, and
“Removing the Flat Tire and
Installing the Spare Tire ”under
Tire Changing 0361.
{Warning
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 a crash. When
changing a wheel, remove any rust
or dirt from places where the wheel
attaches to the vehicle. In an
emergency, a cloth or a paper towel
can be used; however, use a scraper
or wire brush later to remove all
rust or dirt.
Lightly coat the inner diameter of
the wheel hub opening with wheel
bearing grease after a wheel
change or tire rotation to prevent
corrosion or rust buildup. Do not
get grease on the wheel mounting
surface or on the wheel nuts or
bolts.
When It Is Time for New
Tires
Factors such as maintenance,
temperatures, driving speeds, vehicle
loading, and road conditions affect the
wear rate of the tires.
Treadwear indicators are one way to
tell when it is time for new tires.
Treadwear indicators appear when the
tires have only 1.6 mm (1/16 in) or
less of tread remaining. See Tire
Inspection 0353 and
Tire Rotation 0353.
The rubber in tires ages over time.
This also applies to the spare tire,
if the vehicle has one, even if it is
never used. Multiple factors including
temperatures, loading conditions, and
inflation pressure maintenance affect
how fast aging takes place. GM
recommends that tires, including the
spare if equipped, be replaced after six
years, regardless of tread wear. The
tire manufacture date is the last four
digits of the DOT Tire Identification
Number (TIN) which is molded into
one side of the tire sidewall. The first
two digits represent the week (01–52)
and the last two digits, the year. For
example, the third week of the year
2010 would have a four-digit DOT
date of 0310.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
VEHICLE CARE 355
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 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 areneeded, 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 0341, 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 0353 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
(Continued)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
VEHICLE CARE 357
SeeBuying New Tires 0355 and
Accessories and Modifications 0290.
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:
Treadwear 200 Traction AA
Temperature A
All Passenger Car Tires Must
Conform to Federal Safety
Requirements In Addition To
These Grades.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test course.
For example, a tire graded
150 would wear one and one-half
(1½) times as well on thegovernment course as a tire
graded 100. The relative
performance of tires depends
upon the actual conditions of
their use, however, and may
depart significantly from the norm
due to variations in driving habits,
service practices and differences
in road characteristics and
climate.
Traction
The traction grades, from highest
to lowest, are AA, A, B, and C.
Those grades represent the tire's
ability to stop on wet pavement as
measured under controlled
conditions on specified
government test surfaces of
asphalt and concrete. A tire
marked C may have poor traction
performance. Warning: The
traction grade assigned to this tire
is based on straight-ahead braking
traction tests, and does not

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
358 VEHICLE CARE
include acceleration, cornering,
hydroplaning, or peak traction
characteristics.
Temperature
The temperature grades are A (the
highest), B, and C, representing
the tire's resistance to the
generation of heat and its ability
to dissipate heat when tested
under controlled conditions on a
specified indoor laboratory test
wheel. Sustained high temperature
can cause the material of the tire
to degenerate and reduce tire life,
and excessive temperature can
lead to sudden tire failure. The
grade C corresponds to a level of
performance which all passenger
car tires must meet under the
Federal Motor Safety Standard
No. 109. Grades B and A represent
higher levels of performance on
the laboratory test wheel than the
minimum required by law.
Warning: The temperature grade
for this tire is established for a tirethat is properly inflated and not
overloaded. Excessive speed,
underinflation, or excessive
loading, either separately or in
combination, can cause heat
buildup and possible tire failure.
Wheel Alignment and Tire
Balance
The tires and wheels were aligned and
balanced at the factory to provide the
longest tire life and best overall
performance. Adjustments to wheel
alignment and tire balancing are not
necessary on a regular basis. Consider
an alignment check if there is unusual
tire wear or the vehicle is significantly
pulling to one side or the other. Some
slight pull to the left or right,
depending on the crown of the road
and/or other road surface variations
such as troughs or ruts, is normal.
If the vehicle is vibrating when driving
on a smooth road, the tires and
wheels may need to be rebalanced.
See your dealer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent,
cracked, or badly rusted or corroded.
If wheel nuts keep coming loose, the
wheel, wheel bolts, and wheel nuts
should be replaced. If the wheel leaks
air, replace it. Some aluminum wheels
can be repaired. See your dealer if any
of these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the same
load-carrying capacity, diameter,
width, offset, and be mounted the
same way as the one it replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor System
(TPMS) sensors with new GM original
equipment parts.
{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel nuts
can be dangerous. It could affect
the braking and handling of the
(Continued)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
VEHICLE CARE 369
Caution
If any accessories are left on or
plugged in during the jump starting
procedure, they could be damaged.
The repairs would not be covered
by the vehicle warranty. Whenever
possible, turn off or unplug all
accessories on either vehicle when
jump starting.
4. Turn the ignition off. Turn off all lights and accessories in both
vehicles, except the hazard
warning flashers if needed.
{Warning
An electric fan can start up even
when the engine is not running and
can injure you. Keep hands,
clothing, and tools away from any
underhood electric fan.
{Warning
Using a match near a battery can
cause battery gas to explode. People
have been hurt doing this, and
some have been blinded. Use a
flashlight if you need more light.
Battery fluid contains acid that can
burn you. Do not get it on you.
If you accidentally get it in your
eyes or on your skin, flush the place
with water and get medical help
immediately.
{Warning
Fans or other moving engine parts
can injure you badly. Keep your
hands away from moving parts
once the engine is running.
5. Connect one end of the red positive (+) cable to the remote
positive (+) terminal on the
discharged battery. 6. Connect the other end of the red
positive (+) cable to the
positive (+) terminal of the good
battery.
7. Connect one end of the black negative (–) cable to the
negative (–) terminal of the good
battery.
8. Connect the other end of the black negative (–) cable to the
remote negative (–) ground
terminal on the driver side shock
tower for the discharged battery.
9. Start the engine in the vehicle with the good battery and run
the engine at idle speed for at
least four minutes.
10. Try to start the vehicle that had the dead battery. If it will not
start after a few tries, it probably
needs service.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
426 INDEX
IndexA
Accessories and Modifications . . . . . 290
Accessory Power . . . . . . . . . . . . . . . . . . . . 206
Active Fuel Management . . . . . . . . . . . 208
Adaptive Cruise Control . . . . . . . . . . . . 229
Add-On Electrical Equipment . . . . . . 287
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 389
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . 65
Lumbar, Rear Seats . . . . . . . . . . . . . . . . . 74
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 66
Air Cleaner/Filter, Engine . . . . . . . . . . 304
Air Conditioning . . . . . . . . . . . . . . .175, 180
Air Filter Life System . . . . . . . . . . . . . . . . . . . . . . . . 304
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 187
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
How Does an Airbag Restrain? . . . . . 88
Passenger Sensing System . . . . . . . . . 90
What Makes an Airbag Inflate? . . . . 88
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 88 Airbag System (cont'd)
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Where Are the Airbags? . . . . . . . . . . . . 85
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Passenger Status Indicator . . . . . . . 138
Readiness Light . . . . . . . . . . . . . . . . . . . 138
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
System Check . . . . . . . . . . . . . . . . . . . . . . . 84
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 49
Alert Lane Change . . . . . . . . . . . . . . . . . . . . . . 271
Rear Pedestrian . . . . . . . . . . . . . . . . . . . 260
Side Blind Zone (SBZA) . . . . . . . . . . 270
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 340
All-Wheel Drive . . . . . . . . . . . . . . . .216, 317
Antilock Brake System (ABS) . . . . . . 217 Warning Light . . . . . . . . . . . . . . . . . . . . 143
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376
Armrest Storage . . . . . . . . . . . . . . . . . . . . . 115
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Assistance Systems for Driving . . . . 262

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
INDEX 427
Assistance Systems for Parkingand Backing . . . . . . . . . . . . . . . . . . . . . . . 253
Auto Stop Stop/Start System . . . . . . . . . . . . . . . . 203
Automatic Climate Control System . . . . . 175, 180
Dimming Mirrors . . . . . . . . . . . . . . . . . . . 53
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Forward Braking . . . . . . . . . . . . . . . . . . 264
Headlamp System . . . . . . . . . . . . . . . . 169
Transmission . . . . . . . . . . . . . . . . . . . . . . 210
Transmission Fluid . . . . . . . . . . . . . . . 303
Vehicle Hold Light . . . . . . . . . . . . . . . . 144
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . 215
Automatic Vehicle Hold (AVH) . . . . 220
B
Battery
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Load Management . . . . . . . . . . . . . . . . 173
Power Protection . . . . . . . . . . . . . . . . . . 173
Battery - North America . . . . . .316, 367
Blade Replacement, Wiper . . . . . . . . . 319
Brake Parking, Electric . . . . . . . . . . . . . . . . . . 218
System Warning Light . . . . . . . 141, 142 Brake Pad Life System . . . . . . . . . . . . . . 315
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Pad Life System . . . . . . . . . . . . . . . . . . . 315
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Automatic Forward . . . . . . . . . . . . . . . 264
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 266
Break-In, New Vehicle . . . . . . . . . . . . . . 200
Bulb Replacement
Headlamp Aiming . . . . . . . . . . . . . . . . 321
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 321
Buying New Tires . . . . . . . . . . . . . . . . . . . 355
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 122
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 290
California Proposition 65 Warning . . . . . . . . . . . . .289, 316, 367, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2
Capacities and Specifications . . . . . . 397
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . 209 Carbon Monoxide (cont'd)
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Winter Driving . . . . . . . . . . . . . . . . . . . . 195
Cargo
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . 117
Caution, Danger, and Warning . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . 116
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 359
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Charging System Light . . . . . . . . . . . . . 139
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 139
Child Restraints Infants and Young Children . . . . . . . . 97
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . . . . 102
Older Children . . . . . . . . . . . . . . . . . . . . . . 96
Securing . . . . . . . . . . . . . . . . . . . . . . 108, 111
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . 125
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 322
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . 372
Interior Care . . . . . . . . . . . . . . . . . . . . . . 376
Climate Control Systems Automatic . . . . . . . . . . . . . . . . . . . . 175, 180