2018 CADILLAC CT6 engine

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
406 TECHNICAL DATA
Engine Specifications
EngineVIN CodeTransmission Spark Plug Gap
2.0L L4 Engine XAutomatic0.75–0.90 mm (0.030–0.035 in)
3.0L V6 Engine 6Automatic 0.65–0.75 mm (0.26–0.030 in)
3.6L V6 Engine SAutomatic0.80–0.90 mm (0.031–0.035 in)
Engine Drive Belt Routing
2.0L L4 Engine (PLUG-IN)
2.0L L4 Engine (Gasoline Only)3.0L V6 Engine

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
TECHNICAL DATA 407
3.6L V6 Engine

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
416 CUSTOMER INFORMATION
Give only the necessary information
to police and other parties involved in
the crash.
For emergency towing seeRoadside
Service 0411.
Gather the following information:
. Driver name, address, and
telephone number
. Driver license number
. Owner name, address, and
telephone number
. Vehicle license plate number
. Vehicle make, model, and
model year
. Vehicle Identification
Number (VIN)
. Insurance company and policy
number
. General description of the damage
to the other vehicle
Choose a reputable repair facility that
uses quality replacement parts. See
“Collision Parts ”earlier in this section. If the airbag has inflated, see
What
Will You See after an Airbag Inf lates?
0 89.
Managing the Vehicle Damage
Repair Process
In the event that the vehicle requires
damage repairs, GM recommends that
you take an active role in its repair.
If you have a pre-determined repair
facility of choice, take the vehicle
there, or have it towed there. Specify
to the facility that any required
replacement collision parts be original
equipment parts, either new Genuine
GM parts or recycled original GM
parts. Remember, recycled parts will
not be covered by the GM vehicle
warranty.
Insurance pays the bill for the repair,
but you must live with the repair.
Depending on your policy limits, your
insurance company may initially value
the repair using aftermarket parts.
Discuss this with the repair
professional, and insist on Genuine
GM parts. Remember, if the vehicle is
leased, you may be obligated to have the vehicle repaired with Genuine GM
parts, even if your insurance coverage
does not pay the full cost.
If another party's insurance company
is paying for the repairs, you are not
obligated to accept a repair valuation
based on that insurance company's
collision policy repair limits, as you
have no contractual limits with that
company. In such cases, you can have
control of the repair and parts choices
as long as the cost stays within
reasonable limits.
Service Publications
Ordering Information
Service Manuals
Service Manuals have the diagnosis
and repair information on the engines,
transmission, axle, suspension, brakes,
electrical, steering, body, etc.
Owner Information
Owner publications are written
specifically for owners and intended
to provide basic operational

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
CUSTOMER INFORMATION 419
Vehicle Data Recording
and Privacy
The vehicle has a number of
computers that record information
about the vehicle’s performance and
how it is driven. For example, the
vehicle uses computer modules to
monitor and control engine and
transmission performance, to monitor
the conditions for airbag deployment
and deploy them in a crash, and,
if equipped, to provide antilock
braking to help the driver control the
vehicle. These modules may store data
to help the dealer technician service
the vehicle. Some modules may also
store data about how the vehicle is
operated, such as rate of fuel
consumption or average speed. These
modules may retain personal
preferences, such as radio presets, seat
positions, and temperature settings.
Event Data Recorders
This vehicle is equipped with an event
data recorder (EDR). The main
purpose of an EDR is to record, in
certain crash or near crash-likesituations, such as an air bag
deployment or hitting a road obstacle,
data that will assist in understanding
how a vehicle’s systems performed.
The EDR is designed to record data
related to vehicle dynamics and safety
systems for a short period of time,
typically 30 seconds or less. The EDR
in this vehicle is designed to record
such data as:
.
How various systems in your
vehicle were operating;
. Whether or not the driver and
passenger safety belts were
buckled/fastened;
. How far (if at all) the driver was
depressing the accelerator and/or
brake pedal; and,
. How fast the vehicle was traveling.
These data can help provide a better
understanding of the circumstances in
which crashes and injuries occur.
Note
EDR data are recorded by your vehicle
only if a non-trivial crash situation
occurs; no data are recorded by the
EDR under normal driving conditions
and no personal data (e.g., name, gender, age, and crash location) are
recorded. However, other parties, such
as law enforcement, could combine
the EDR data with the type of
personally identifying data routinely
acquired during a crash investigation.
To read data recorded by an EDR,
special equipment is required, and
access to the vehicle or the EDR is
needed. In addition to the vehicle
manufacturer, other parties, such as
law enforcement, that have the special
equipment, can read the information
if they have access to the vehicle or
the EDR.
GM will not access these data or share
it with others except: with the consent
of the vehicle owner or, if the vehicle
is leased, with the consent of the
lessee; in response to an official
request by police or similar
government office; as part of GM's
defense of litigation through the
discovery process; or, as required by
law. Data that GM collects or receives
may also be used for GM research
needs or may be made available to
others for research purposes, where a
need is shown and the data is not tied
to a specific vehicle or vehicle owner.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
422 ONSTAR
PressQto 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 Assistance.
. 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,
OnStar service plan (excludes Basic
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 Assistance, 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-11292458) -
2018 - crc - 2/14/17
432 INDEX
IndexA
Accessories and Modifications . . . . . 298
Accessory Power . . . . . . . . . . . . . . . . . . . . 224
Adaptive Cruise Control . . . . . . . . . . . . 245
Add-On Electrical Equipment . . . . . . 295
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 396
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . . . . . 67
Lumbar, Rear Seats . . . . . . . . . . . . . . . . . 76
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 68
Air Cleaner/Filter, Engine . . . . . . . . . . 311
Air Conditioning . . . . . . . . . . . . . . .191, 197
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 204
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
How Does an Airbag Restrain? . . . . . 89
Passenger Sensing System . . . . . . . . . 91
What Makes an Airbag Inflate? . . . . 89
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 89
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Where Are the Airbags? . . . . . . . . . . . . 86 Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Passenger Status Indicator . . . . . . . 141
Readiness Light . . . . . . . . . . . . . . . . . . . 141
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
System Check . . . . . . . . . . . . . . . . . . . . . . . 85
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 51
Alert
Lane Change . . . . . . . . . . . . . . . . . . . . . . 269
Side Blind Zone (SBZA) . . . . . . . . . . 268
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 341
All-Wheel Drive . . . . . . . . . . . . . . . .234, 326
Antilock Brake System (ABS) . . . . . . 234 Warning Light . . . . . . . . . . . . . . . . . . . . 146
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384
Armrest Storage . . . . . . . . . . . . . . . . . . . . . 116
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Assistance Systems for Driving . . . . 260
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 254
Auto Stop Mode . . . . . . . . . . . . . . . . . . . . 150
Automatic Climate Control System . . . . . 191, 197

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
INDEX 433
Automatic (cont'd)Dimming Mirrors . . . . . . . . . . . . . . . . . . . 55
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Forward Braking . . . . . . . . . . . . . . . . . . 262
Headlamp System . . . . . . . . . . . . . . . . 185
Transmission . . . . . . . . . . . . . . . . . . . . . . 231
Transmission Fluid . . . . . . . . . . . . . . . 310
Vehicle Hold Light . . . . . . . . . . . . . . . . 147
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . . . . . . . 233
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Automatic Vehicle Hold (AVH) . . . . 237
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Power Protection . . . . . . . . . . . . . . . . . . 189
Battery - North America . . . . . .324, 374
Battery Gauge High Voltage . . . . . . . . . . . . . . . . . . . . . . 135
Blade Replacement, Wiper . . . . . . . . . 327
Boost Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 136
Brake Parking, Electric . . . . . . . . . . . . . . . . . . 235
System Warning Light . . . . . . . . . . . . 145
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 Brakes (cont'd)
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Regenerative Braking . . . . . . . . . . . . . 237
Braking . . . . . . . . . . . . . . . . . . . . . . . . .207, 208 Automatic Forward . . . . . . . . . . . . . . . 262
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 264
Break-In, New Vehicle . . . . . . . . . . . . . . 216
Bulb Replacement . . . . . . . . . . . . . . . . . . 330
Headlamp Aiming . . . . . . . . . . . . . . . . 329
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 330
License Plate Lamps . . . . . . . . . . . . . . 330
Buying New Tires . . . . . . . . . . . . . . . . . . . 355C
Cadillac Premium Care
Maintenance . . . . . . . . . . . . . . . . . . . . . . 390
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 122
California
Fuel Requirements . . . . . . . . . . . . . . . . 287
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 297
California Proposition
65 Warning . . . . . . . . . . . . .297, 324, 374, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2
Capacities and Specifications . . . . . . 404 Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . . . . . 230
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Winter Driving . . . . . . . . . . . . . . . . . . . . 211
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . 117
Caution, Danger, and Warning . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . 116
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 360
Charge Cord . . . . . . . . . . . . . . . . . . . . . . . . . 279
Charging
Delay Override . . . . . . . . . . . . . . . . . . . . 275
Electrical Requirements . . . . . . . . . . 285
Plug-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Programmable . . . . . . . . . . . . . . . . . . . . 152
Utility Interruption . . . . . . . . . . . . . . . 284
Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Charging Status Screens . . . . . . . . . . . . 275
Charging System Light . . . . . . . . . . . . . 142
Check Engine Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 143
Child Restraints Infants and Young Children . . . . . . . . 98
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . . . . 103
Older Children . . . . . . . . . . . . . . . . . . . . . . 96
Securing . . . . . . . . . . . . . . . . . . . . . . 109, 111

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
434 INDEX
Child Restraints (cont'd)Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . 125
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 331
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . 380
Interior Care . . . . . . . . . . . . . . . . . . . . . . 384
Climate Control Systems Automatic . . . . . . . . . . . . . . . . . . . . 191, 197
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Cluster, Instrument . . . . . . . . . . . .127, 130
Collision Damage Repair . . . . . . . . . . . 414
Compact Spare Tire . . . . . . . . . . . . . . . . . 373
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Compressor Kit, Tire Sealant . . . . . . . 362
Connections OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
Control Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Control of a Vehicle . . . . . . . . . . . . . . . . 207
Convenience Net . . . . . . . . . . . . . . . . . . . . 117
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 54 Coolant
Engine Temperature Gauge . . . . . . 139
Engine Temperature Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .191, 197
Cooling System . . . . . . . . . . . . . . . .312, 316
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 187
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 242 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Cruise Control, Adaptive . . . . . . . . . . . 245
Customer Assistance . . . . . . . . . . . . . . . 410 Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410
Text Telephone (TTY) Users . . . . . 410
Customer Information
Service Publications OrderingInformation . . . . . . . . . . . . . . . . . . . . . . 416
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 408
D
Damage Repair, Collision . . . . . . . . . . . 414
Danger, Warning, and Caution . . . . . . . . 2
Data CollectionInfotainment System . . . . . . . . . . . . . 420
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420 Data Recorders, Event . . . . . . . . . . . . . . 419
Daytime Running Lamps (DRL) . . . 185
Defensive Driving . . . . . . . . . . . . . . . . . . . 207
Delayed Charging Override . . . . . . . . . 275
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 45
Diagnostics
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425
Distracted Driving . . . . . . . . . . . . . . . . . . 206
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 187
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 152
Delayed Locking . . . . . . . . . . . . . . . . . . . . 45
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 45
Rear Seat Pass-Through . . . . . . . . . . . . 77
Drive Belt Routing, Engine . . . . . . . . . 406
Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . 234, 326
Driver Assistance Systems . . . . . . . . . 253
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 162
Driver Mode Control . . . . . . . . . . . . . . . . 241
Driver Selected Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Driving
Assistance Systems . . . . . . . . . . . . . . . 260
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 290