2017 CADILLAC CT6 cooling

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
VEHICLE CARE 289
air, replace it. Some aluminum wheels
can be repaired. See your dealer if any
of these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the same
load-carrying capacity, diameter,
width, offset, and be mounted the
same way as the one it replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor System
(TPMS) sensors with new GM original
equipment parts.
{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel nuts
can be dangerous. It could affect
the braking and handling of the
vehicle. Tires can lose air, and
cause loss of control, causing a
crash. Always use the correct wheel,
wheel bolts, and wheel nuts for
replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or odometer
calibration, headlamp aim, bumper
height, vehicle ground clearance,
and tire or tire chain clearance to
the body and chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used one
is dangerous. How it has been used
or how far it has been driven may
be unknown. It could fail suddenly
and cause a crash. When replacing
wheels, use a new GM original
equipment wheel.
Tire Chains
Caution
Use tire chains only where legal and
only when necessary. Use low
profile chains that add no more
than 10 mm thickness to the tire
tread and inner sidewall. Use chains
that are the proper size for the tires.
Install them on the tires of the rear
axle. Do not use chains on the tires
of the front axle. Tighten them as
tightly as possible with the ends
securely fastened. Drive slowly and
follow the chain manufacturer's
instructions. If the chains contact
the vehicle, stop and retighten
them. If the contact continues, slow
down until it stops. Driving too fast
or spinning the wheels with chains
on will damage the vehicle.
If a Tire Goes Flat
It is unusual for a tire to blow out
while driving, especially if the tires are
maintained properly. SeeTires0276.
If air goes out of a tire, it is much

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
SERVICE AND MAINTENANCE 313
Maintenance Schedule
Additional Required Services -
Normal12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires, if recommended for the vehicle, and
perform Required Services. Check engine oil level
and oil life percentage. Change engine oil and filter,
if needed. (1)@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Inspect evaporative control system. (3)@ @@
Replace engine air cleaner filter. (4)@ @ @ @ @ @ @ @ @ @
Replace spark plugs. Inspect spark plug wires. (3.0L
Twin Turbo Engine)@ @
Replace spark plugs. Inspect spark plug wires. (3.6L
Engine)@
Drain and fill engine cooling system. (5)@
Change transfer case fluid. (6)@
Change front and rear axle fluid.@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
314 SERVICE AND MAINTENANCE
Footnotes—Maintenance Schedule
Additional Required Services -
Normal
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0284.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter. (3)
Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition.
(4) Or every two years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
(5) Or every five years, whichever
comes first. See Cooling System0255.
(6) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced. (7)
Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace brake fluid every five
years. See Brake Fluid 0262.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
SERVICE AND MAINTENANCE 315
Maintenance Schedule
Additional Required Services -
Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires, if recommended for the vehicle, and
perform Required Services. Check engine oil level
and oil life percentage. Change engine oil and filter,
if needed. (1)@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Inspect evaporative control system. (3)@ @@
Replace engine air cleaner filter. (4)@ @ @ @ @ @ @ @ @ @
Replace spark plugs. Inspect spark plug wires. (3.0L
Twin Turbo Engine)@ @
Replace spark plugs. Inspect spark plug wires. (3.6L
Engine)@
Change automatic transmission fluid and filter.@@@
Change transfer case fluid. (5)@@@
Change front and rear axle fluid.@@@
Drain and fill engine cooling system. (6)@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
316 SERVICE AND MAINTENANCE
Footnotes—Maintenance Schedule
Additional Required Services -
Severe
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0284.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter.
(3) Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition. (4)
Or every two years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
(5) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced.
(6) Or every five years, whichever
comes first. See Cooling System0255.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace brake fluid every five
years. See Brake Fluid 0262.Special Application
Services
Severe Conditions Requiring
More Frequent Maintenance
.
Public service, military,
or commercial use vehicles to
include the following:
‐Ambulances, police cars and
emergency rescue vehicles.
‐ Civilian vehicles such as light
duty pick-up trucks, SUVs and
passenger cars that are used in
military applications.
‐ Recovery vehicles such as tow
trucks and flatbed single vehicle
carriers or any vehicle that is
consistently used in towing
trailers or other loads.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
322 TECHNICAL DATA
Vehicle Data
Capacities and Specifications
The following approximate capacities are given in metric and English conversions. SeeRecommended Fluids and Lubricants
0 318 for more information.
Application Capacities
Metric English
Air Conditioning Refrigerant For the air conditioning system refrigerant type and charge amount, see the refrigerant label under thehood. See your dealer for more information.
Cooling System –Engine
3.0L V6 Twin Turbo Engine 10.4 L 11.0 qt
3.0L V6 Twin Turbo Engine with Rear A/C 12.2 L 12.9 qt
3.0L V6 Twin Turbo Engine with Rear A/C and Auxiliary
Radiator 13.1 L 13.8 qt
3.6L V6 Engine 9.8 L 10.4 qt
3.6L V6 Engine with Rear A/C 11.4 L 12.0 qt
Cooling System –Twin Turbo
3.0L V6 Engine Intercoolers 3.2 L 3.4 qt
Engine Oil with Filter 5.7 L 6.0 qt
Fuel Tank 72.7 L 19.2 gal

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INDEX 329
Coolant (cont'd)Engine Temperature Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .171, 178
Cooling System . . . . . . . . . . . . . . . . . . . . . 255
Engine Messages . . . . . . . . . . . . . . . . . . 143
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 167
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 211 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Cruise Control, Adaptive . . . . . . . . . . . 213
D
Danger, Warning, and Caution . . . . . . . . 2
Data Recorders, Event . . . . . . . . . . . . . . 325
Daytime Running Lamps (DRL) . . . 165
Defensive Driving . . . . . . . . . . . . . . . . . . . 185
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 37
Distracted Driving . . . . . . . . . . . . . . . . . . 185
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 167
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 135
Ajar Messages . . . . . . . . . . . . . . . . . . . . . 143
Delayed Locking . . . . . . . . . . . . . . . . . . . . 37
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 37
Rear Seat Pass-Through . . . . . . . . . . . . 67
Drive Belt Routing, Engine . . . . . . . . . 324 Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . 204, 264
Driver Assistance Systems . . . . . . . . . 221
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 136
Driver Mode Control . . . . . . . . . . . . . . . . 209
Driving Assistance Systems . . . . . . . . . . . . . . . 228
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 185
For Better Fuel Economy . . . . . . . . . . . 26
Hill and Mountain Roads . . . . . . . . 188
If the Vehicle is Stuck . . . . . . . . . . . . 190
Loss of Control . . . . . . . . . . . . . . . . . . . . 187
Off-Road Recovery . . . . . . . . . . . . . . . . 187
Vehicle Load Limits . . . . . . . . . . . . . . 191
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 188
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
E
Electric Parking Brake . . . . . . . . . . . . . . 205
Electric Parking Brake Light . . . . . . . 130
Electrical Equipment, Add-On . . . . . 243
Electrical SystemEngine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Fuses and Circuit Breakers . . . . . . . 269
Instrument Panel Fuse Block . . . . 272
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 268 Electrical System (cont'd)
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Engine
Air Cleaner/Filter . . . . . . . . . . . . . . . . . 254
Check and Service EngineSoon Light . . . . . . . . . . . . . . . . . . . . . . . 127
Compartment Overview . . . . . . . . . . 247
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Coolant Temperature Gauge . . . . . 124
Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . 132
Cooling System . . . . . . . . . . . . . . . . . . . 255
Cooling System Messages . . . . . . . . 143
Drive Belt Routing . . . . . . . . . . . . . . . . 324
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Oil Life System . . . . . . . . . . . . . . . . . . . . 252
Oil Messages . . . . . . . . . . . . . . . . . . . . . . 144
Oil Pressure Gauge . . . . . . . . . . . . . . . . 123
Oil Pressure Light . . . . . . . . . . . . . . . . . 133
Overheating . . . . . . . . . . . . . . . . . . . . . . . 259
Power Messages . . . . . . . . . . . . . . . . . . 144
Running While Parked . . . . . . . . . . . 201
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Engine Oil Temperature Gauge . . . . . . . . . . . . . . . 123
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 168
Event Data Recorders . . . . . . . . . . . . . . 325

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
332 INDEX
Lights (cont'd)Safety Belt Reminders . . . . . . . . . . . . 125
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Service Electric Parking Brake . . . 130
StabiliTrak
®OFF . . . . . . . . . . . . . . . . . . 132
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 133
Traction Control System (TCS)/StabiliTrak
®. . . . . . . . . . . . . . 132
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 131
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 38
Delayed Locking . . . . . . . . . . . . . . . . . . . . 37
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Lockout Protection . . . . . . . . . . . . . . . . . 38
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 187
Low Fuel Warning Light . . . . . . . . . . . 134
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . 278
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . 91
Lumbar Adjustment . . . . . . . . . . . . . 58, 65 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Maintenance Schedule . . . . . . . . . . . . . 311 Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . . . . . 318
Malfunction Indicator Lamp . . . . . . . 127
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . 203
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Memory Features . . . . . . . . . . . . . . . . . . . . 12
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . 61
Messages Airbag System . . . . . . . . . . . . . . . . . . . . . 149
Battery Voltage and Charging . . . . 141
Brake System . . . . . . . . . . . . . . . . . . . . . . 142
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Engine Cooling System . . . . . . . . . . . 143
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 144
Engine Power . . . . . . . . . . . . . . . . . . . . . 144
Fuel System . . . . . . . . . . . . . . . . . . . . . . . 145
Key and Lock . . . . . . . . . . . . . . . . . . . . . . 145
Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Object Detection System . . . . . . . . . 145
Ride Control System . . . . . . . . . . . . . . 148
Safety Belt . . . . . . . . . . . . . . . . . . . . . . . . . 149
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Service Vehicle . . . . . . . . . . . . . . . . . . . . 149
Starting the Vehicle . . . . . . . . . . . . . . 150 Messages (cont'd)
Steering System . . . . . . . . . . . . . . . . . . . 149
Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Transmission . . . . . . . . . . . . . . . . . . . . . . 151
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Vehicle Reminder . . . . . . . . . . . . . . . . . 151
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . 151
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . 151
Window . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Mirror Rear Camera . . . . . . . . . . . . . . . . . . . . . . . . 47
Mirrors Automatic Dimming . . . . . . . . . . . . . . . . 46
Automatic Dimming Rearview . . . . . 47
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . 46
Mirrors, Interior Rearview . . . . . . . . . . . 47
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 Driver Control . . . . . . . . . . . . . . . . . . . . . 209
Monitor System, Tire Pressure . . . . . 280
N
Net, Convenience . . . . . . . . . . . . . . . . . . . 105
New Vehicle Break-In . . . . . . . . . . . . . . . 194
Night Vision System . . . . . . . . . . . . . . . . 234