2020 CADILLAC CT6 check oil

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
SERVICE AND MAINTENANCE 363
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. (1) Check engine oil level
and oil life percentage. Change engine oil and filter,
if needed. Check engine air filter life percentage and
status. Change engine air filter, if needed.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Inspect evaporative control system. (3)@ @@
Replace spark plugs. Inspect spark plug wires and/or
boots. (4.2L Engine)@ @
Replace spark plugs. Inspect spark plug wires and/or
boots. (3.6L Engine)@
Change automatic transmission fluid and filter.@@@
Change transfer case fluid. (4)@@@
Change rear axle fluid. (4)@@@
Change front axle fluid 4WD. (4)@@@
Drain and fill engine cooling system. (5)@
Visually inspect accessory drive belts. (6)@
Replace brake fluid. (7)
Replace windshield wiper blades. (8)
@ @ @ @ @ @ @ @ @ @
Replace hood and/or body lift support gas struts. (9)@ @
Replace air conditioning desiccant. (10)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
364 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 Rotation0329.
(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) 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.
(5)
Or every five years, whichever
comes first. See Cooling System0284.
(6) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(7) Replace brake fluid every five
years. See Brake Fluid 0291.
(8) Or every 12 months, whichever
comes first. See Wiper Blade
Replacement 0295.
(9) Or every 10 years, whichever
comes first. See Gas Strut(s)0296.
(10) Replace air conditioning
desiccant every seven years.Special Application
Services
. Severe Commercial Use Vehicles
Only: Lubricate chassis
components every oil change.
. Have underbody flushing service
performed. See "Underbody
Maintenance" in Exterior Care
0 349.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
SERVICE AND MAINTENANCE 365
Additional Maintenance
and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional maintenance
services may be required.
It is recommended that your dealer
perform these services—their trained
dealer technicians know your vehicle
best. Your dealer can also perform a
thorough assessment with a
multi-point inspection to recommend
when your vehicle may need
attention.
The following list is intended to
explain the services and conditions to
look for that may indicate services are
required. Battery
The 12-volt battery supplies power to
start the engine and operate any
additional electrical accessories.
.
To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of cracking
or splitting.
. Trained dealer technicians have
access to tools and equipment to
inspect the belts and recommend
adjustment or replacement when
necessary. Brakes
Brakes stop the vehicle and are crucial
to safe driving.
.
Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping.
. Trained dealer technicians have
access to tools and equipment to
inspect the brakes and recommend
quality parts engineered for the
vehicle.
Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. See Recommended Fluids
and Lubricants 0368 for GM approved
fluids.
. Engine oil and windshield washer
fluid levels should be checked at
every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be filled.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
CONNECTED SERVICES 399
On some vehicles, Wi-Fi can also be
managed from the Wi-Fi
Hotspot menu.
MyCadillac Mobile App (If Available)
Download the myCadillac mobile app
to compatible Apple and Android
smartphones. Cadillac users can
access the following services from a
smartphone:
.Remotely start/stop the vehicle,
if factory-equipped.
. Lock/unlock doors, if equipped
with automatic locks.
. Activate the horn and lamps.
. Check the vehicle’s fuel level, oil
life, or tire pressure,
if factory-equipped with the Tire
Pressure Monitor System.
. Send destinations to the vehicle.
. Locate the vehicle on a map (U.S.
market only).
. Turn the vehicle's Wi-Fi hotspot
on/off, manage settings, and
monitor data consumption,
if equipped. .
Locate a dealer and schedule
service.
. Request Roadside Service.
. Set a parking reminder with pin
drop, take a photo, make a note,
and set a timer.
. Connect with Cadillac on social
media.
Features are subject to change. For
myCadillac mobile app information
and compatibility, see my.cadillac.com.
An active OnStar or connected service
plan may be required. A compatible
device, factory-installed remote start,
and power locks are required. Data
rates apply. See www.onstar.com for
details and system limitations.
Remote Services
Contact an OnStar Advisor to unlock
the doors or sound the horn and flash
the lamps.
Marketplace
OnStar Advisors can provide offers
from restaurants and retailers on your
route, help locate hotels, or book a
room. These services vary by market.
Diagnostics
By monitoring and reporting on the
vehicle’s key systems, OnStar
Advanced Diagnostics, if equipped,
provides a way to keep up on
maintenance. Capabilities vary by
model. See www.onstar.com for details
and system limitations. Features are
subject to change. For updates on
feature capabilities, see
my.cadillac.com. Message and data
rates may apply.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
INDEX 403
Driving (cont'd)Off-Road Recovery . . . . . . . . . . . . . . . . 175
Track Events and Competitive . . . 176
Vehicle Load Limits . . . . . . . . . . . . . . 179
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 176
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
E
Electric Brake Boost . . . . . . . . . . . . . . . . 199
Electric Parking Brake . . . . . . . . . . . . . . 200
Electric Parking Brake Light . . . . . . . 125
Electrical Equipment, Add-On . . . . . 269
Electrical System
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Fuses and Circuit Breakers . . . . . . . 298
Instrument Panel Fuse Block . . . . 306
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 282
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 123
Compartment Overview . . . . . . . . . . 274
Coolant Temperature Gauge . . . . . 119 Engine (cont'd)
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 129
Cooling System . . . . . . . . . . . . . . . . . . . 284
Drive Belt Routing . . . . . . . . . . . . . . . . 375
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Oil Life System . . . . . . . . . . . . . . . . . . . . 280
Oil Pressure Gauge . . . . . . . . . . . . . . . . 117
Oil Pressure Light . . . . . . . . . . . . . . . . . 130
Overheating . . . . . . . . . . . . . . . . . . . . . . . 288
Power Messages . . . . . . . . . . . . . . . . . . 139
Running While Parked . . . . . . . . . . . 192
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Engine Air Filter Life System . . . . . . 281
Engine Oil Temperature Gauge . . . . . . . . . . . . . . . 118
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 155
Equipment, Towing . . . . . . . . . . . . . . . . . 267
Event Data Recorders . . . . . . . . . . . . . . 388
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 155
Extended Parking . . . . . . . . . . . . . . . . . . . 191
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 64
Exterior Lamp Controls . . . . . . . . . . . . 149
Exterior Lamps Off Reminder . . . . . . 151
Exterior Lighting Battery Saver . . . . 156
F
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . 282
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 151
Flashers, Hazard Warning . . . . . . . . . . 152
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Fluid Automatic Transmission . . . . . . . . . 281
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 33
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Front Seats Heated and Ventilated . . . . . . . . . . . . . 51
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Economy, Driving for Better . . . . . 172
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 261
Filling the Tank . . . . . . . . . . . . . . . . . . . 260
Foreign Countries . . . . . . . . . . . . . . . . . 259

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
INDEX 405
InformationPublication Ordering . . . . . . . . . . . . . 385
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . 157
Infotainment System . . . . . . . . . . . . . . . 389
Instrument Cluster . . . . . . . . . . . .110, 113
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . . . . . . 98
Instrument Panel Overview . . . . . . . . . . . 5
Interior Rearview Mirrors . . . . . . . . . . . 35
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . 343
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . 10
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 317
Lamps Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Daytime Running (DRL) . . . . . . . . . . 151
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Exterior Controls . . . . . . . . . . . . . . . . . . 149
Exterior Lamps Off Reminder . . . . 151 Lamps (cont'd)
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 123
On Reminder . . . . . . . . . . . . . . . . . . . . . . 131
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Lane Change Alert (LCA) . . . . . . . . . . . 252
Lane Keep Assist (LKA) . . . . . . . . . . . . 254
Lane Keep Assist Light . . . . . . . . . . . . . 127
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 60
LATCH System Replacing Parts after a Crash . . . . . . 91
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . . . . 84
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 297
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Illumination Control . . . . . . . . . . . . . . 153
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Lights Airbag Readiness . . . . . . . . . . . . . . . . . 121
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . 126
Automatic Vehicle Hold . . . . . . . . . . 127
Brake System Warning . . . . . . . . . . . 125
Charging System . . . . . . . . . . . . . . . . . . 122 Lights (cont'd)
Check Engine (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 123
Cruise Control . . . . . . . . . . . . . . . . . . . . . 131
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Driver Mode Control . . . . . . . . . . . . . . 129
Electric Parking Brake . . . . . . . . . . . . 125
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 129
Engine Oil Pressure . . . . . . . . . . . . . . . 130
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 151
Gear Shifting . . . . . . . . . . . . . . . . . . . . . . 126
High-Beam On . . . . . . . . . . . . . . . . . . . . 131
High/Low Beam Changer . . . . . . . . . 151
Lane Keep Assist . . . . . . . . . . . . . . . . . . 127
Low Fuel Warning . . . . . . . . . . . . . . . . 130
Seat Belt Reminders . . . . . . . . . . . . . . 120
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Service Electric Parking Brake . . . 126
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 128
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 129
Traction Control System (TCS)/StabiliTrak . . . . . . . . . . . . . . . . 128
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 128
Locking Rear Axle . . . . . . . . . . . . . . . . . . 208
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 21
Delayed Locking . . . . . . . . . . . . . . . . . . . . 21

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/11/19
406 INDEX
Locks (cont'd)Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Lockout Protection . . . . . . . . . . . . . . . . . 22
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 175
Low Fuel Warning Light . . . . . . . . . . . 130
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . 317
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . 84
Lumbar Adjustment . . . . . . . . . . . . . 46, 55 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . 365
Maintenance Schedule . . . . . . . . . . . . . 359 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . 368
Malfunction Indicator Lamp . . . . . . . 123
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . 197
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . 48
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . 139 Messages (cont'd)
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . 139
Mirror
Rear Camera . . . . . . . . . . . . . . . . . . . . . . . . 35
Mirrors Automatic Dimming . . . . . . . . . . . . . . . . 34
Automatic Dimming Rearview . . . . . 35
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . 34
Mirrors, Interior Rearview . . . . . . . . . . . 35
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Driver Control . . . . . . . . . . . . . . . . . . . . . 204
Monitor System, Tire Pressure . . . . . 324
N
Navigation Connected Services . . . . . . . . . . . . . . . 397
Net, Convenience . . . . . . . . . . . . . . . . . . . 101
New Vehicle Break-In . . . . . . . . . . . . . . . 183
Night Vision System . . . . . . . . . . . . . . . . 250
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Off-Road
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Engine Oil Life System . . . . . . . . . . . 280
Engine Oil Pressure Gauge . . . . . . . 117
Pressure Light . . . . . . . . . . . . . . . . . . . . . 130
Older Children, Restraints . . . . . . . . . . . 77
Online Owner Center . . . . . . . . . . . . . . . 379
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
OnStar Additional Information . . . . 392
OnStar Emergency . . . . . . . . . . . . . . . . . . 391
OnStar Overview . . . . . . . . . . . . . . . . . . . . 390
OnStar Security . . . . . . . . . . . . . . . . . . . . . 391
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Overheating, Engine . . . . . . . . . . . . . . . . 288
Overview Instrument Panel . . . . . . . . . . . . . . . . . . . . 5
P
ParkShifting Out of . . . . . . . . . . . . . . . . . . . . 189
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Parking Brake and P (Park)
Mechanism Check . . . . . . . . . . . . . . . 294
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . 191