ignition CADILLAC CT6 2020 Repair Manual

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
306 VEHICLE CARE
FusesUsage
F26 Charge air coolant pump
F27 Engine control module ignition –2
F28 –
F29 –
Relays Usage
R1 Headlamp/Daytime running lamps
R2 Air conditioning control
R3 Starter motor
R4 Starter pinion
R5 Cabin heater pump
R6 Engine control module
R7 –
R8 –Instrument Panel Fuse
Block
The instrument panel fuse block is
behind the driver side instrument
panel storage compartment.
The storage compartment has a press
to open latch. To access the fuses,
open the compartment by pressing
and releasing near the top center
square.
Apply pressure to the two retaining
tabs on the sides of the compartment,
until the two retaining tabs clear the
sides of the instrument panel. Allow
the compartment to move downward,
and out of the way.
To reinstall the compartment, reverse
the steps.
The vehicle may not be equipped with
all of the fuses shown.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
VEHICLE CARE 311
FusesUsage
F62 –
F63 Rear seat infotainment module
F64 Engine control module ignition
F65 Rear window sunshade
F66 Rear vision camera/ Inside Rearview
mirror
F67 Run/Crank misc/Air quality sensor/
Integrated chassis
control module/
Electronic shifter/DC
DC converter
F68 Damping control module
F69 Television tuner module
F70 –
F71 –
F72 – Fuses
Usage
F73 –
F74 –
F75 –
Relays Usage
R1 Rear seat auxiliary power outlet
R2 Spare
R3 Run/Crank

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
314 VEHICLE CARE
FusesUsage
F57 Rear left and rear center short range
radar sensors/Long
range radar sensors/
Right rear external
object calculating
module
F58 Auxiliary audio/Video
F59 –
F60 Memory bolster module
F61 –
F62 Ventilated seat
F63 Universal garage door opener/Power
sounder module/Rain
sensor
F64 Passenger memory seat module
F65 Right front short range radar sensor/
Advance driver
assist map Fuses
Usage
F66 Television tuner module
F67 –
F68 –
F69 –
F70 Right front motorized seat belt pretensioner
F71 Rear heated seat module
F72 Sunroof
F73 Rear vision camera/ Inside Rearview
mirror/Air quality
sensor
F74 Rear window sunshade
F75 Engine control module ignition Fuses
Usage
F76 Misc run crank/ Energy storage
control module/DC
DC converter/Rear
external object
calculating module/
Shifter interface
board module
F77 Trunk auxiliary power outlet
F78 Rear HVAC display
F79 –
F80 –
F81 –
F82 –
F83 –
F84 –
F85 –
F86 –
F87 –

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
326 VEHICLE CARE
light comes on, stop as soon as
possible and inflate the tires to the
recommended pressure shown on the
Tire and Loading Information label.
SeeVehicle Load Limits 0179.
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) 0132.
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
0179 for an
example of the Tire and Loading
Information label and its location.
Also see Tire Pressure 0322.
The TPMS can warn about a low tire
pressure condition but it does not
replace normal tire maintenance. See
Tire Inspection 0329, Tire Rotation
0 329, and Tires0315.
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

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
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
ONSTAR 391
Or
.Give OnStar Turn-by-Turn
Navigation voice commands.
. Obtain and customize the Wi-Fi
hotspot name or SSID and
password, if equipped.
Press
Qto connect to an Advisor to:
. Verify account information or
update contact information.
. Get driving directions.
. Receive a Diagnostic check of the
vehicle's key operating systems.
. Receive Roadside Service.
. Manage Wi-Fi Settings,
if equipped.
Press
>to get a priority connection
to an OnStar Advisor available 24/7 to:
. Get help for an emergency.
. Be a Good Samaritan or respond
to an AMBER Alert.
. Get assistance in severe weather
or other crisis situations and find
evacuation routes.
OnStar Services
Emergency
Emergency Services require an active
safety and security plan. With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor who
is immediately connected in to the
vehicle to help.
Press
>for a priority connection to
an OnStar Advisor who can contact
emergency service providers, direct
them to your exact location, and relay
important information.
With OnStar Crisis Assist, specially
trained Advisors are available
24 hours a day, 7 days a week, to
provide a central point of contact,
assistance, and information during a
crisis.
With Roadside Service, Advisors can
locate a nearby service provider to
help with a flat tire, a battery jump,
or an empty gas tank.
Security
If equipped, OnStar provides these
services:
. With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
. With Remote Ignition Block,
if equipped, OnStar can block the
engine from being restarted.
. With Stolen Vehicle Slowdown,
if equipped, OnStar can work with
law enforcement to gradually slow
the vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked
and the vehicle alarm sounds, a
notification by text, e-mail, or phone
call will be sent. If the vehicle is
stolen, an OnStar Advisor can work
with authorities to recover the vehicle.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
ONSTAR 393
Services for People with
Disabilities
Advisors provide services to help with
physical disabilities and medical
conditions.
Press
Qto help:
. Locate a gas station with an
attendant to pump gas.
. Find a hotel, restaurant, etc., that
meets accessibility needs.
. Provide directions to the closest
hospital or pharmacy in urgent
situations.
TTY Users
OnStar has the ability to communicate
to deaf, hard-of-hearing,
or speech-impaired customers while in
the vehicle. The available
dealer-installed TTY system can
provide in-vehicle access to all OnStar
services, except Virtual Advisor and
OnStar Turn-by-Turn Navigation.
If equipped, TTY mode can be turned
on or off by touching Settings, then
Apps, and then Phone. When TTY mode is on, phone calls can be made
or received with OnStar using the
infotainment display.
OnStar Personal Identification
Number (PIN)
A PIN is needed to access some
OnStar services. The PIN will need to
be changed the first time when
speaking with an Advisor. To change
the OnStar PIN, contact an OnStar
Advisor by pressing
Qor calling
1-888-4ONSTAR.
Warranty
OnStar equipment may be warranted
as part of the vehicle warranty.
Languages
The vehicle can be programmed to
respond in multiple languages.
Press
Qand ask for an Advisor.
Advisors are available in English,
Spanish, and French. Available
languages may vary by country.
Potential Issues
OnStar cannot perform Remote Door
Unlock or Stolen Vehicle Assistance
after the vehicle has been off
continuously for 10 days without an
ignition cycle. If the vehicle has not
been started for 10 days, OnStar can
contact Roadside Service or a
locksmith to help gain access to the
vehicle.
Global Positioning System (GPS)
. Obstruction of the GPS can occur
in a large city with tall buildings;
in parking garages; around
airports; in tunnels and
underpasses; or in an area with
very dense trees. If GPS signals are
not available, the OnStar system
should still operate to call OnStar.
However, OnStar could have
difficulty identifying the exact
location.
. In emergency situations, OnStar
can use the last stored GPS
location to send to emergency
responders.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
404 INDEX
Fuel (cont'd)Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Low Fuel Warning Light . . . . . . . . . 130
Management, Active . . . . . . . . . . . . . . 191
Prohibited Fuels . . . . . . . . . . . . . . . . . . 259
Recommended . . . . . . . . . . . . . . . 258, 259
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Fuses Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Fuses and Circuit Breakers . . . . . . . 298
Instrument Panel Fuse Block . . . . 306
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
G
Garage Door Opener . . . . . . . . . . . . . . . . 145
Programming . . . . . . . . . . . . . . . . . . . . . . 145
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 296
Gauges
Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Engine Coolant Temperature . . . . 119
Engine Oil Pressure . . . . . . . . . . . . . . . 117
Engine Oil Temperature . . . . . . . . . . 118
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Speedometer . . . . . . . . . . . . . . . . . . . . . . 115
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 116 Gauges (cont'd)
Trip Odometer . . . . . . . . . . . . . . . . . . . . 116
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . 109
Gear Shifting Light . . . . . . . . . . . . . . . . . 126
General Information Service and Maintenance . . . . . . . . 357
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 271
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
H
Hazard Warning Flashers . . . . . . . . . . 152
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 44
Head-up Display . . . . . . . . . . . . . . . . . . . . 135
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 152
Bulb Replacement . . . . . . . . . . . . . . . . 297
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 151
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 151
High-Beam On Light . . . . . . . . . . . . . . 131
High/Low Beam Changer . . . . . . . . . 151
Lamps On Reminder . . . . . . . . . . . . . . 131 Heated
Steering Wheel . . . . . . . . . . . . . . . . . . . . 103
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Heated and Ventilated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 34
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Heating . . . . . . . . . . . . . . . . . . . . . . . . .158, 163
High-Beam On Light . . . . . . . . . . . . . . . . 131
High-Speed Operation . . . . . . . . . . . . . . 324
Hill and Mountain Roads . . . . . . . . . . 177
Hill Start Assist (HSA) . . . . . . . . . . . . . 201
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
How to Wear Seat Belts Properly . . . 58
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . .158, 163
I
Ignition Positions . . . . . . . . . . . . . . . . . . . 183
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Indicator Pedestrian Ahead . . . . . . . . . . . . . . . . . 127
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 127
Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 79