2018 CADILLAC CT6 ECU

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
IN BRIEF 25
2. Power Outlet 12-Volt DirectCurrent
Lift the cover to access the power
outlet.
See Power Outlets 0123.
Universal Remote System
If equipped, this system provides a
way to replace up to three remote
control transmitters used to activate
devices such as garage door openers,
security systems, and home
automation devices. Read the instructions completely
before attempting to program the
Universal Remote system. Because of
the steps involved, it may be helpful
to have another person available to
assist you with programming the
Universal Remote system.
See
Universal Remote System 0179.
Sunroof
If equipped with a sunroof, the
ignition must be on or in ACC/
ACCESSORY, or Retained Accessory
Power (RAP) must be active, to
operate the sunroof.
See Ignition Positions 0217 and
Retained Accessory Power (RAP) 0224.
1. SLIDE Switch
2. TILT Switch
Slide Switch
Express-Open/Express-Close : Press
the rear or front of
D(1) to the
second detent and release to
express-open or express-close the
sunroof.
Open/Close (Manual Mode) : Press
the rear of
D(1) to the first detent
and hold to open the sunroof. Press
the front of
D(1) to the first detent
and hold to close the sunroof.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
34 KEYS, DOORS, AND WINDOWS
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . . . . . . 35
Remote Vehicle Start . . . . . . . . . . . . . . 42
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . 43
Power Door Locks . . . . . . . . . . . . . . . . . 45
Delayed Locking . . . . . . . . . . . . . . . . . . . 45
Automatic Door Locks . . . . . . . . . . . . 45
Lockout Protection . . . . . . . . . . . . . . . . 46
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . 46
Doors
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . . . . . 51
Vehicle Alarm System . . . . . . . . . . . . . 51
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . 53
Immobilizer Operation . . . . . . . . . . . . 53
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . . . . . 54
Power Mirrors . . . . . . . . . . . . . . . . . . . . . . 55 Folding Mirrors . . . . . . . . . . . . . . . . . . . . 55
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . 55
Automatic Dimming Mirror . . . . . . . 55
Reverse Tilt Mirrors . . . . . . . . . . . . . . . 56
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . 56
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Rear Camera Mirror . . . . . . . . . . . . . . . 56
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Power Windows . . . . . . . . . . . . . . . . . . . . 58
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Rear Window Sunshade . . . . . . . . . . . 60
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with a
Remote Keyless Entry (RKE)
transmitter is dangerous and
children or others could be
seriously injured or killed. They
could operate the power windows
or other controls or make the
vehicle move. The windows will
function with the RKE transmitter
in the vehicle, and children or
others could be caught in the path
of a closing window. Do not leave
children in a vehicle with an RKE
transmitter.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
KEYS, DOORS, AND WINDOWS 45
3. Move the cap forward and pressthe forward edge to secure the
cap in place (8).
4. Release the door handle.
Power Door Locks
Q: Press to lock the doors.
K:Press to unlock the doors.
Delayed Locking
This feature delays the locking of the
doors until five seconds after all doors
are closed.
Delayed locking can only be turned on
when the Unlocked Door Anti-Lockout
has been turned off. When
Qis pressed on the power door
lock switch while the door is open, a
chime will sound three times
indicating delayed locking is active.
The doors will lock automatically
five seconds after all doors are closed.
If a door is reopened before that time,
the five-second timer will reset when
all doors are closed again.
Press
Qon the door lock switch again
or press
Qon the RKE transmitter to
lock the doors immediately.
This feature can also be programmed.
See Vehicle Personalization 0170.
Automatic Door Locks
The doors will lock automatically
when all doors are closed, the ignition
is on, and the vehicle is shifted out of
P (Park).
To unlock the doors:
.
Press
Kon the power door lock
switch.
. Shift the transmission into
P (Park).

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
KEYS, DOORS, AND WINDOWS 51
Emergency Trunk Release
Handle
Caution
Do not use the emergency trunk
release handle as a tie-down or
anchor point when securing items
in the trunk as it could damage the
handle.
There is a glow-in-the-dark emergency
trunk release handle on the trunk lid.
This handle will glow following
exposure to light. Pull the release
handle to open the trunk from the
inside.
After pulling the emergency trunk
release handle, push the handle back
into the bezel.
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft alarm
system.
The indicator light, on the instrument
panel near the windshield, indicates
the status of the system.
Off : Alarm system is disarmed.
On Solid : Vehicle is secured during
the delay to arm the system.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
52 KEYS, DOORS, AND WINDOWS
Fast Flash :Vehicle is unsecured.
A door, the hood, or the trunk is open.
Slow Flash : Alarm system is armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of
three ways:
.Use the RKE transmitter.
. Use the Keyless Access
system.
. With a door open, press
Q
on the interior of the door.
3. After 30 seconds the alarm system will arm, and the
indicator light will begin to
slowly flash indicating the alarm
system is operating. Pressing
Q
on the RKE transmitter a second
time will bypass the 30-second
delay and immediately arm the
alarm system.
The vehicle alarm system will not arm
if the doors are locked with the key. If the driver door is opened without
first unlocking with the RKE
transmitter, the horn will chirp and
the lights will flash to indicate
pre-alarm. If the vehicle is not started,
or the door is not unlocked by
pressing
Kon the RKE transmitter
during the 10-second pre-alarm, the
alarm will be activated.
The alarm will also be activated if a
passenger door, the trunk, or the hood
is opened without first disarming the
system. When the alarm is activated,
the turn signals flash and the horn
sounds for about 30 seconds. The
alarm system will then re-arm to
monitor the next unauthorized event.
Disarming the Alarm System
To disarm the alarm system or turn
off the alarm if it has been activated:
. Press
Kon the RKE transmitter.
. Unlock the vehicle using the
Keyless Access system.
. Start the vehicle.
To avoid setting off the alarm by
accident: .
Lock the vehicle after all
occupants have left the vehicle
and all doors are closed.
. Always unlock a door with the
RKE transmitter or use the Keyless
Access system.
Unlocking the driver door with the key
will not disarm the system or turn off
the alarm.
How to Detect a Tamper
Condition
IfKis pressed on the RKE
transmitter and the horn chirps and
the lights flash three times, a previous
alarm occurred while the system was
armed.
If the alarm has been activated, a
message will appear on the Driver
Information Center (DIC).
Power Sounder, Inclination
Sensor, and Intrusion Sensor
In addition to the standard
theft-deterrent system features, this
system may also have a power
sounder, inclination sensor, and
intrusion sensor.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
KEYS, DOORS, AND WINDOWS 53
The power sounder provides an
audible alarm, which is distinct from
the vehicle’s horn. It has its own
power source, and can sound an alarm
if the vehicle’s battery is
compromised.
The inclination sensor can set off the
alarm if it senses movement of the
vehicle, such as a change in vehicle
orientation.
The intrusion sensor monitors the
vehicle interior, and can activate the
alarm if it senses unauthorized entry
into the vehicle’s interior. Do not
allow passengers or pets to remain in
the vehicle when the intrusion sensor
is activated.
Before arming the theft-deterrent
system and activating the intrusion
sensor:
.Make sure all doors and windows
are completely closed.
. Secure any loose items such as
sunshades.
. Make sure there are no
obstructions blocking the sensors
in the front overhead console.Inclination and Intrusion
Sensors Disable Switch
It is recommended that the intrusion
and inclination sensors be deactivated
if pets are left in the vehicle or if the
vehicle is being transported.
With the vehicle turned off, presso
in the front overhead console. The
indicator light will come on
momentarily, indicating that these
sensors have been disabled for the
next alarm system arming cycle.
Immobilizer
See Radio Frequency Statement 0417.
Immobilizer Operation
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the vehicle is
turned off.
The immobilization system is
disarmed when the vehicle is started
or the ignition is in ACC/ACCESSORY
and a valid transmitter is present in
the vehicle.
The security light, in the instrument
cluster, comes on if there is a problem
with arming or disarming the
theft-deterrent system.
The system has one or more RKE
transmitters matched to an
immobilizer control unit in the
vehicle. Only a correctly matched RKE

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
54 KEYS, DOORS, AND WINDOWS
transmitter will start the vehicle.
If the transmitter is ever damaged,
you may not be able to start your
vehicle.
When trying to start the vehicle, the
security light may come on briefly
when the ignition is turned on.
If the engine does not start and the
security light stays on, there is a
problem with the system. Turn the
ignition off and try again.
If the vehicle will not change ignition
modes (ACC/ACCESSORY, ON, OFF),
and the RKE transmitter appears to be
undamaged, try another transmitter.
Or, you may try placing the
transmitter in the transmitter pocket
located in the center console.If the ignition modes will not change
with the other transmitter, your
vehicle needs service. If the ignition
does change modes, the first
transmitter may be faulty. See your
dealer.
It is possible for the immobilizer
system to learn new or replacement
RKE transmitters. Up to eight
transmitters can be programmed for
the vehicle. To program additional
transmitters, see
“Programming
Transmitters to the Vehicle ”under
Remote Keyless Entry (RKE) System
Operation 035.
Do not leave the key or device that
disarms or deactivates the
theft-deterrent system in the vehicle.Exterior Mirrors
Convex Mirrors
{Warning
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you cut
too sharply into the right lane, you
could hit a vehicle on the right.
Check the inside mirror or glance
over your shoulder before changing
lanes.
The passenger side mirror is convex
shaped. A convex mirror's surface is
curved so more can be seen from the
driver seat.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/15/17
64 SEATS AND RESTRAINTS
Seats and Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . . . . . . 65
Front Seats
Power Seat Adjustment . . . . . . . . . . . 67
Lumbar Adjustment . . . . . . . . . . . . . . . 67
Thigh Support Adjustment . . . . . . . . 68
Reclining Seatbacks . . . . . . . . . . . . . . . 69
Memory Seats . . . . . . . . . . . . . . . . . . . . . . 69
Heated and Ventilated FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Lumbar Adjustment . . . . . . . . . . . . . . . 76
Heated and Ventilated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Rear Seat Pass-Through Door . . . . . 77
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . 80
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . . . . . . 83
Seat Belt Extender . . . . . . . . . . . . . . . . . 83 Safety System Check . . . . . . . . . . . . . . 83
Seat Belt Care . . . . . . . . . . . . . . . . . . . . . . 83
Replacing Seat Belt System Parts
after a Crash . . . . . . . . . . . . . . . . . . . . . . 84
Airbag System
Airbag System . . . . . . . . . . . . . . . . . . . . . 85
Where Are the Airbags? . . . . . . . . . . . 86
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
What Makes an Airbag Inflate? . . . 89
How Does an Airbag Restrain? . . . 89
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Passenger Sensing System . . . . . . . . 91
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Adding Equipment to the Airbag-Equipped Vehicle . . . . . . . . 95
Airbag System Check . . . . . . . . . . . . . . 96
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . 96
Child Restraints
Older Children . . . . . . . . . . . . . . . . . . . . . 96
Infants and Young Children . . . . . . 98
Child Restraint Systems . . . . . . . . . 100
Where to Put the Restraint . . . . . . 102
Lower Anchors and Tethers forChildren (LATCH System) . . . . . . 103 Replacing LATCH System Parts
After a Crash . . . . . . . . . . . . . . . . . . . . 109
Securing Child Restraints (With the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . . . . . 109
Securing Child Restraints (With the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . . . . . 111