
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . 2
In Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Keys, Doors, and Windows . . . . . . . . . 34
Seats and Restraints . . . . . . . . . . . . . . . 64
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Instruments and Controls . . . . . . . . 118
Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Infotainment System . . . . . . . . . . . . . 190
Climate Controls . . . . . . . . . . . . . . . . . . 191
Driving and Operating . . . . . . . . . . . . 205
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 296
Service and Maintenance . . . . . . . . . 388
Technical Data . . . . . . . . . . . . . . . . . . . . 403
Customer Information . . . . . . . . . . . . 408
Reporting Safety Defects . . . . . . . . . 418
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421
Index . . . . . . . . . . . . . . . . . . . . . . . . 432

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
IN BRIEF 5
In Brief
Instrument Panel
Instrument Panel Overview . . . . . . . . . 6
Initial Drive Information
Initial Drive Information . . . . . . . . . . . 8
Stop/Start System(Gasoline Only) . . . . . . . . . . . . . . . . . . . . 8
Remote Keyless Entry (RKE) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . . . . . 9
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Seat Adjustment . . . . . . . . . . . . . . . . . . . 11
Memory Features . . . . . . . . . . . . . . . . . . 13
Second Row Seats . . . . . . . . . . . . . . . . . 13
Heated and Ventilated Seats . . . . . . 14
Head Restraint Adjustment . . . . . . . 15
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Passenger Sensing System . . . . . . . . 15
Mirror Adjustment . . . . . . . . . . . . . . . . 16
Steering Wheel Adjustment . . . . . . . 16
Interior Lighting . . . . . . . . . . . . . . . . . . . 17
Exterior Lighting . . . . . . . . . . . . . . . . . . . 17
Windshield Wiper/Washer . . . . . . . . 18
Climate Controls . . . . . . . . . . . . . . . . . . . 19
Transmission . . . . . . . . . . . . . . . . . . . . . . . 20
Vehicle Features
Infotainment System . . . . . . . . . . . . . . 21
Steering Wheel Controls . . . . . . . . . . 21
Cruise Control . . . . . . . . . . . . . . . . . . . . . 21
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . 22
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Night Vision System . . . . . . . . . . . . . . . 22
Forward Automatic Braking (FAB) . . . . . . . . . . . . . . . . . . . . 22
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Lane Keep Assist (LKA) . . . . . . . . . . . 23
Lane Change Alert (LCA) . . . . . . . . . . 23
Surround Vision . . . . . . . . . . . . . . . . . . . 23
Rear Vision Camera (RVC) . . . . . . . . 23
Rear Cross Traffic Alert (RCTA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Parking Assist . . . . . . . . . . . . . . . . . . . . . . 24
Automatic Parking Assist (APA) . . . . . . . . . . . . . . . . . . . . . . 24
Reverse Automatic Braking (RAB) . . . . . . . . . . . . . . . . . . . . 24
Surround Vision Recorder . . . . . . . . . 24
Power Outlets . . . . . . . . . . . . . . . . . . . . . . 24
Universal Remote System . . . . . . . . . 25
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PLUG-IN Features
High Voltage Safety Information . . . . . . . . . . . . . . . . . . . . . . 26
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Regenerative Braking . . . . . . . . . . . . . . 29
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Performance and Maintenance
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . 30
Tire Pressure Monitor . . . . . . . . . . . . . 30
Fuel (2.0L L4 Turbo Engine) . . . . . . 30
Fuel (3.0L Twin Turbo V6 Engine) . . . . . . . . . . . . . . . . . . . . . . . . 31
Fuel (3.6L V6 Engine) . . . . . . . . . . . . . 31
E85 or FlexFuel . . . . . . . . . . . . . . . . . . . . 31
Engine Oil Life System . . . . . . . . . . . . 31
Driving for Better Fuel Economy (Gasoline Only) . . . . . . . . . . . . . . . . . . . 32
Driving for Better Energy Efficiency (PLUG-IN Only) . . . . . . 32
Roadside Service . . . . . . . . . . . . . . . . . . . 33

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
IN BRIEF 17
Interior Lighting
Dome Lamp
The dome lamp is in the overhead
console.
To change the dome lamp settings,
press:
(OFF :Turns the lamp off, even
when a door is open.
+ON/OFF : Turns the lamp on
or off. Reading Lamps
There are front and rear reading
lamps on the overhead console and
over the rear passenger doors. These
lamps come on automatically when
any door is opened.
To manually turn the reading lamps
on or off:
Pressmornnext to each overhead
console reading lamp.
Press the lamp lenses over the rear
passenger doors.
For more information on interior
lighting, see Instrument Panel
Illumination Control 0187.
Exterior Lighting
The exterior lamp control is on the
turn signal lever.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
18 IN BRIEF
Turn the control to the following
positions:
O:Turns off the exterior lamps. The
knob returns to the AUTO position
after it is released. Turn to
Oagain to
reactivate the AUTO mode.
AUTO : Automatically turns the
exterior lamps on and off, depending
on outside lighting.
;: Turns on the parking lamps
including all lamps, except the
headlamps.
5: Turns on the headlamps together
with the parking lamps and
instrument panel lights.
See:
. Exterior Lamp Controls 0183.
. Turn and Lane-Change Signals
0186.
Windshield Wiper/Washer
With the ignition on or in ACC/
ACCESSORY, move the lever up or
down to select the wiper speed.
HI : Use for fast wipes.
LO : Use for slow wipes.
AUTO : Use this setting for
intermittent wipes when Rainsense is
disabled, or for Rainsense wipes when
it is enabled. For intermittent wipes,
move the lever up to AUTO, then turn
the band on the wiper lever up for
more frequent wipes or down for less
frequent wipes.
If Rainsense is enabled in vehicle
personalization, move the lever up to
AUTO, then turn the band on the
wiper lever to adjust the sensitivity to
moisture.
. Turn the band up for more
sensitivity to moisture.
. Turn the band down for less
sensitivity to moisture.
. Move the windshield wiper lever
out of the AUTO position to
deactivate Rainsense.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
166 INSTRUMENTS AND CONTROLS
HUD Display on the VehicleWindshield
The HUD may display some of the
following vehicle information and
vehicle messages or alerts:
. Speed
. Tachometer
. Audio
. Phone
. Navigation
. Collision Alert
. Cruise Control
. Lane Keep Assist
. Low Fuel Some vehicle messages or alerts
displayed in the HUD may be cleared
by using the steering wheel controls.
See
Vehicle Messages 0169.
The HUD control is to the left of the
steering wheel.
To adjust the HUD image:
1. Adjust the driver seat.
2. Start the engine.
3. Use the following settings to adjust the HUD.
$:Press down or lift up to center
the HUD image. The HUD image can
only be adjusted up and down, not
side to side.
!: Press to select the display view.
Each press will change the
display view.
D: Lift up and hold to brighten the
display. Press down and hold to dim
the display. Hold down to turn the
display off.
The HUD image will automatically
dim and brighten to compensate for
outside lighting. The HUD brightness
control can also be adjusted as
needed.
The HUD image can temporarily light
up depending on the angle and
position of the sunlight on the HUD
display. This is normal.
Polarized sunglasses could make the
HUD image harder to see.
Head-Up Display (HUD) Rotation
Option
This feature allows for adjusting the
angle of the HUD image.
Press SEL on the steering wheel
controls while Head-up Display
Rotation is highlighted to enter Adjust
Mode. Press
yorzto adjust the
angle of the HUD display. Press
Sor

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
INSTRUMENTS AND CONTROLS 169
Vehicle Messages
Messages displayed on the DIC
indicate the status of the vehicle or
some action that may be needed to
correct a condition. Multiple messages
may appear one after another.
The messages that do not require
immediate action can be
acknowledged and cleared by pressing
V. The messages that require
immediate action cannot be cleared
until that action is performed.
All messages should be taken
seriously; clearing the message does
not correct the problem.
If a SERVICE message appears, see
your dealer.
Follow the instructions given in the
messages. The system displays
messages regarding the following
topics:
. Service Messages
. Fluid Levels
. Vehicle Security
. Brakes
. Ride Control Systems .
Driver Assistance Systems
. Cruise Control
. Lighting and Bulb Replacement
. Wiper/Washer Systems
. Doors and Windows
. Seat Belts
. Airbag Systems
. Engine and Transmission
. Tire Pressure
. Battery
Engine Power Messages
ENGINE/PROPULSION POWER IS
REDUCED
This message displays when the
vehicle's propulsion power is reduced.
Reduced propulsion power can affect
the vehicle's ability to accelerate.
If this message is on, but there is no
observed reduction in performance,
proceed to your destination. The
performance may be reduced the next
time the vehicle is driven. The vehicle
may be driven at a reduced speed
while this message is on, but maximum acceleration and speed may
be reduced. Anytime this message
stays on, or displays repeatedly, the
vehicle should be taken to your dealer
for service as soon as possible.
Vehicle Speed Messages
SPEED LIMITED TO
XXX KM/H (MPH)
This message shows that the vehicle
speed has been limited to the speed
displayed. The limited speed is a
protection for various propulsion and
vehicle systems, such as lubrication,
thermal, suspension, Teen Driver if
equipped, or tires.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
INSTRUMENTS AND CONTROLS 171
To enable valet mode:1. Enter a four-digit code on the keypad.
2. Select Enter to go to the confirmation screen.
3. Re-enter the four-digit code.
Touch LOCK or UNLOCK to lock or
unlock the system. Touch Back to go
back to the previous menu.
The four-digit code can be texted to a
paired phone if forgotten by pressing
Option on the Valet Mode lock screen.
Teen Driver
See “Teen Driver” under“Settings ”in
the infotainment manual.
Radio
Select and the following may display:
. Manage Favorites
. Number of Favorites Shown
. Audible Touch Feedback
. Bose Audio Pilot
. Maximum Start Up Volume Manage Favorites
This allows favorites to be edited. See
“Manage Favorites
”in “Settings” under
“Radio ”in the infotainment manual.
Number of Favorites Shown
Touch to set the number of favorites
to display.
Select the desired number or select
Auto and the infotainment system will
automatically adjust the number of
favorites shown.
Audible Touch Feedback
This allows Audible Touch Feedback
to be turned on or off.
Select Off or On.
Bose Audio Pilot
This feature adjusts the volume based
on the noise in the vehicle. See “Bose
AudioPilot Noise Compensation
Technology” under“Infotainment
System Settings” in the infotainment
manual.
Select Off or On. Maximum Start Up Volume
This feature sets the maximum
startup volume. If the vehicle is
started and the volume is greater than
this level, the volume is adjusted to
this level.
To set the maximum startup volume,
touch + or
−to increase or decrease.
Vehicle
Select and the following may display:
.
Climate and Air Quality
. Collision/Detection Systems
. Comfort and Convenience
. Energy
. Lighting
. Power Door Locks
. Remote Lock, Unlock, Start
Climate and Air Quality
Select and the following may display:
.
Auto Fan Speed
. Air Quality Sensor
. Auto Cooled Seats
. Auto Heated Seats

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
INSTRUMENTS AND CONTROLS 175
Lighting
Select and the following may display:
.Vehicle Locator Lights
. Exit Lighting
Vehicle Locator Lights
This feature will flash the exterior
lamps and allows some of the exterior
lamps and most of the interior lamps
to turn on briefly when
Kon the
Remote Keyless Entry (RKE)
transmitter is pressed to locate the
vehicle.
Select Off or On.
Exit Lighting
This allows the selection of how long
the exterior lamps stay on when
leaving the vehicle when it is dark
outside.
Select Off, 30 Seconds, 60 Seconds,
or 120 Seconds.
Power Door Locks
Select and the following may display:
. Unlocked Door Anti-Lockout
. Auto Door Unlock .
Delayed Door Lock
Unlocked Door Anti-Lockout
When on, this feature will keep the
driver door from locking when the
door is open. If Off is selected, the
Delayed Door Lock menu will be
available.
Select Off or On.
Auto Door Unlock
This allows selection of which of the
doors will automatically unlock when
the vehicle is shifted into P (Park).
Select Off, All Doors, or Driver Door.
Delayed Door Lock
When on, this feature will delay the
locking of the doors. To override the
delay, press the power door lock
switch on the door.
Select Off or On.
Remote Lock, Unlock, Start
Select and the following may display:
. Remote Unlock Light Feedback
. Remote Lock Feedback
. Remote Door Unlock .
Remote Start Auto Cool Seats
. Remote Start Auto Heat Seats
. Remote Window Operation
. Passive Door Unlock
. Passive Door Lock
. Remote Left in Vehicle Alert
Remote Unlock Light Feedback
When on, the exterior lamps will flash
when unlocking the vehicle with the
RKE transmitter.
Select Off or Flash Lights.
Remote Lock Feedback
This allows selection of what type of
feedback is given when locking the
vehicle with the RKE transmitter.
Select Off, Lights and Horn, Lights
Only, or Horn Only.
Remote Door Unlock
This allows selection of which doors
will unlock when pressingKon the
RKE transmitter.
Select All Doors or Driver Door.