2020 CADILLAC CT6 warning light

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
VEHICLE CARE 327
light and the DIC message should
go off after successfully
completing the sensor matching
process. See "TPMS Sensor
Matching Process" later in this
section.
. One or more TPMS sensors are
missing or damaged. The
malfunction light and the DIC
message should go off when the
TPMS sensors are installed and
the sensor matching process is
performed successfully. See your
dealer for service.
. Replacement tires or wheels do
not match the original equipment
tires or wheels. Tires and wheels
other than those recommended
could prevent the TPMS from
functioning properly. See Buying
New Tires 0331.
. Operating electronic devices or
being near facilities using radio
wave frequencies similar to the
TPMS could cause the TPMS
sensors to malfunction. If the TPMS is not functioning
properly, it cannot detect or signal a
low tire pressure condition. See your
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 0317 and
Vehicle Load Limits 0179.
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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
328 VEHICLE CARE
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. If the tire fill alert does not operate
due to TPMS interference, move the
vehicle about 1 m (3 ft) back or
forward and try again. If the tire fill
alert feature is not working, use a tire
pressure gauge.
TPMS Sensor Matching Process
Each TPMS sensor has a unique
identification code. The identification
code needs to be matched to a new
tire/wheel position after rotating the
vehicle’s tires or replacing one or more
of the TPMS sensors. The TPMS
sensor matching process should also
be performed after replacing a spare
tire with a road tire containing the
TPMS sensor. The malfunction light
and the DIC message should go off at
the next ignition cycle. The sensors
are matched to the tire/wheel
positions, using a TPMS relearn tool,
in the following order: driver side
front tire, passenger side front tire,
passenger side rear tire, and driver
side rear tire. See your dealer for
service or to purchase a relearn tool.
A TPMS relearn tool can also be
purchased. See Tire Pressure Monitor
Sensor Activation Tool at www.gmtoolsandequipment.com or
call 1-800-GM TOOLS
(1-800-468-6657).
There are two minutes to match the
first tire/wheel position, and
five minutes overall to match all four
tire/wheel positions. If it takes longer,
the matching process stops and must
be restarted.
The TPMS sensor matching process is:
1. Set the parking brake.
2. Place the vehicle in Service Mode. See Ignition Positions
0 183.
3. Make sure the Tire Pressure info display option is turned on. The
info displays on the DIC can be
turned on and off through the
Options menu. See Driver
Information Center (DIC) 0132.
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) 0132.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
330 VEHICLE CARE
alignment. SeeWhen It Is Time for
New Tires 0330 and
Wheel Replacement 0335.
Use this rotation pattern when
rotating the tires.
Do not include the 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 0322 and
Vehicle Load Limits 0179. Reset the Tire Pressure Monitor
System. See
Tire Pressure Monitor
Operation 0325.
Check that all wheel nuts are
properly tightened. See “Wheel
Nut Torque ”under Capacities and
Specifications 0373, and
“Removing the Flat Tire and
Installing the Spare Tire ”under
Tire Changing 0337.
{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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
VEHICLE CARE 333
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. 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 0331 and
Accessories and Modifications 0272.
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 the

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
334 VEHICLE CARE
government 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 notinclude 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
VEHICLE CARE 345
The jump start negative terminal (3)
and positive terminal (4) are on the
battery of the vehicle providing the
jump start.
The positive jump start connection for
the discharged battery is under a red
cover. Remove the cover to expose the
terminal.1. Check the other vehicle. It must have a 12-volt battery with a
negative ground system.
Caution
If the other vehicle does not have a
12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. Position the two vehicles so that they are not touching.
3. Set the parking brake and shift to P (Park). See Shifting Into Park
0 188.
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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
400 INDEX
IndexA
Accessories and Modifications . . . . . 272
Accessory Power . . . . . . . . . . . . . . . . . . . . 188
Active Fuel Management . . . . . . . . . . . 191
Adaptive Cruise Control . . . . . . . . . . . . 211
Add-On Electrical Equipment . . . . . . 269
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . 46
Lumbar, Rear Seats . . . . . . . . . . . . . . . . . 55
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 47
Air Cleaner/Filter, Engine . . . . . . . . . . 282
Air Conditioning . . . . . . . . . . . . . . .158, 163
Air Filter Life System . . . . . . . . . . . . . . . . . . . . . . . . 281
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 170
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
How Does an Airbag Restrain? . . . . . 70
Passenger Sensing System . . . . . . . . . 71
What Makes an Airbag Inflate? . . . . 69
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 70 Airbag System (cont'd)
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Where Are the Airbags? . . . . . . . . . . . . 67
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Passenger Status Indicator . . . . . . . 121
Readiness Light . . . . . . . . . . . . . . . . . . . 121
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
System Check . . . . . . . . . . . . . . . . . . . . . . . 65
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 30
Alert Lane Change . . . . . . . . . . . . . . . . . . . . . . 252
Rear Pedestrian . . . . . . . . . . . . . . . . . . . 242
Side Blind Zone (SBZA) . . . . . . . . . . 252
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 316
All-Wheel Drive . . . . . . . . . . . . . . . .199, 293
Antilock Brake System (ABS) . . . . . . 199 Warning Light . . . . . . . . . . . . . . . . . . . . 126
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Armrest Storage . . . . . . . . . . . . . . . . . . . . . . 99
Assistance Systems for Driving . . . . 243

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
INDEX 401
Assistance Systems for Parkingand Backing . . . . . . . . . . . . . . . . . . . . . . . 235
Auto Stop Stop/Start System . . . . . . . . . . . . . . . . 186
Automatic Climate Control System . . . . . 158, 163
Dimming Mirrors . . . . . . . . . . . . . . . . . . . 34
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Emergency Braking (AEB) . . . . . . . . 246
Headlamp System . . . . . . . . . . . . . . . . 152
Transmission . . . . . . . . . . . . . . . . . . . . . . 193
Transmission Fluid . . . . . . . . . . . . . . . 281
Vehicle Hold Light . . . . . . . . . . . . . . . . 127
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . 197
Automatic Vehicle Hold (AVH) . . . . 202
B
Battery
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Load Management . . . . . . . . . . . . . . . . 156
Power Protection . . . . . . . . . . . . . . . . . . 156
Battery - North America . . . . . .292, 343
Blade Replacement, Wiper . . . . . . . . . 295
Boost Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 117
Brake Electric Boost . . . . . . . . . . . . . . . . . . . . . 199 Brake (cont'd)
Parking, Electric . . . . . . . . . . . . . . . . . . 200
System Warning Light . . . . . . . . . . . . 125
Brake Pad Life System . . . . . . . . . . . . . . 291
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Pad Life System . . . . . . . . . . . . . . . . . . . 291
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 Automatic Emergency (AEB) . . . . . 246
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 247
Break-In, New Vehicle . . . . . . . . . . . . . . 183
Bulb Replacement
Headlamp Aiming . . . . . . . . . . . . . . . . 297
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 297
Buying New Tires . . . . . . . . . . . . . . . . . . . 331
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 106
California
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 272
California Proposition 65 Warning . . . . . . . . . . . . .271, 292, 343, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2 Capacities and Specifications . . . . . . 373
Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . . . . . 192
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Winter Driving . . . . . . . . . . . . . . . . . . . . 178
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . 101
Caution, Danger, and Warning . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . 100
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 335
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Charging System Light . . . . . . . . . . . . . 122
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 123
Child Restraints Infants and Young Children . . . . . . . . 79
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Older Children . . . . . . . . . . . . . . . . . . . . . . 77
Securing . . . . . . . . . . . . . . . . . . . . . . . . .92, 94
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 298
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . 349
Interior Care . . . . . . . . . . . . . . . . . . . . . . 353