coolant temperature CADILLAC CT6 2019 User Guide

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
312 VEHICLE CARE
At the end of the cycle, check the
coolant level in the surge tank and
add coolant if it is low. Turn off the
vehicle, allow the Electronic Control
Module (ECM) to go to sleep, about
2 minutes, and repeat Steps 4-7.
Listen for pump activation and
movement of the control valves while
watching the level of the coolant in
the surge tank. If the tank empties,
turn the ignition off, carefully remove
the surge tank cap, refill to the COLD
FILL mark, and repeat Steps 4-7. The
fill and air removal process will run
for approximately 10 minutes.
4.2L V8 Engine OnlyCaution
This vehicle has a specific coolant
fill procedure. Failure to follow this
procedure could cause the engine to
overheat and be severely damaged.
See your dealer for assistance.
Because of possible engine failure or
damage if performed without the
proper tools and information, engine coolant should only be added
by a qualified technician. See your
dealer.
Engine Overheating
The vehicle has several indicators to
warn of the engine overheating.
There is an engine coolant
temperature gauge and an engine
coolant temperature warning light on
the instrument cluster. See
Engine
Coolant Temperature Gauge 0135 and
Engine Coolant Temperature Warning
Light 0146. The vehicle may also
display a message on the Driver
Information Center (DIC).
If the decision is made not to lift the
hood when this warning appears, get
service help right away. See Roadside
Service 0405.
If the decision is made to lift the
hood, make sure the vehicle is parked
on a level surface. Then check to see if
the engine cooling fan is running.
If the engine is overheating, the fan
should be running. If it is not, do not
continue to run the engine. Have the
vehicle serviced.
Caution
Do not run the engine if there is a
leak in the engine cooling system.
This can cause a loss of all coolant
and can damage the system and
vehicle. Have any leaks fixed
right away.
If Steam Is Coming from the
Engine Compartment
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure cap,
even a little, can cause them to
come out at high speed and you
could be burned. Never turn the cap
when the cooling system, including
the pressure cap, is hot. Wait for
the cooling system and pressure
cap to cool.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
VEHICLE CARE 313
If No Steam Is Coming from the
Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen or
heard, the problem may not be too
serious. Sometimes the engine can get
a little too hot when the vehicle:
.Climbs a long hill on a hot day
. Stops after high-speed driving
. Idles for long periods in traffic
If the overheat warning is displayed
with no sign of steam: 1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the highest
fan speed. Open the windows as
necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or
N (Neutral), and let the
engine idle.
If the engine coolant temperature
gauge is no longer in the overheated
area or the engine coolant
temperature warning light no longer
displays, the vehicle can be driven. Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
distance from the vehicle in front.
If the warning does not come back on,
continue to drive normally and have
the cooling system checked for proper
fill and function.
If the warning continues, pull over,
stop, and park the vehicle right away.
If there is no sign of steam, idle the
engine for three minutes while parked.
If the warning is still displayed, turn
off the engine until it cools down.
Washer Fluid
What to Use
When windshield washer fluid is
needed, be sure to read the
manufacturer's instructions before
use. If operating the vehicle in an area
where the temperature may fall below
freezing, use a fluid that has sufficient
protection against freezing.
Adding Washer Fluid
Open the cap with the washer symbol
on it. Add washer fluid until the tank
is full. See
Engine Compartment
Overview 0292 for reservoir location.
Caution
.
Do not use washer fluid that
contains any type of water
repellent coating. This can
cause the wiper blades to
chatter or skip.
. Do not use engine coolant
(antifreeze) in the windshield
washer. It can damage the
windshield washer system
and paint.
(Continued)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
428 INDEX
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Cluster, Instrument . . . . . . . . . . . .127, 130
Collision Damage Repair . . . . . . . . . . . 408
Compact Spare Tire . . . . . . . . . . . . . . . . . 366
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Connected Services
Connections . . . . . . . . . . . . . . . . . . . . . . . 423
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 425
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . 422
Connections Connected Services . . . . . . . . . . . . . . . 423
Control Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Control of a Vehicle . . . . . . . . . . . . . . . . 191
Convenience Net . . . . . . . . . . . . . . . . . . . . 117
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 52
Coolant Engine Temperature Gauge . . . . . . 135
Engine Temperature Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .175, 180
Cooling System . . . . . . . . . . . . . . . . . . . . . 307
Cornering Lamps . . . . . . . . . . . . . . . . . . . 170
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 171 Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 227 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Cruise Control, Adaptive . . . . . . . . . . . 229
Cruise Control, Super . . . . . . . . . . . . . . . 237
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Customer Assistance . . . . . . . . . . . . . . . 403 Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403
Text Telephone (TTY) Users . . . . . 403
Customer Information
Publications OrderingInformation . . . . . . . . . . . . . . . . . . . . . . 410
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 401
D
Damage Repair, Collision . . . . . . . . . . . 408
Danger, Warning, and Caution . . . . . . . . 2
Data CollectionInfotainment System . . . . . . . . . . . . . 413
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
Data Recorders, Event . . . . . . . . . . . . . . 412
Daytime Running Lamps (DRL) . . . 168
Defensive Driving . . . . . . . . . . . . . . . . . . . 191
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 40
Diagnostics Connected Services . . . . . . . . . . . . . . . 425 Distracted Driving . . . . . . . . . . . . . . . . . . 190
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 171
Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 149
Delayed Locking . . . . . . . . . . . . . . . . . . . . 40
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 40
Rear Seat Pass-Through . . . . . . . . . . . . 75
Drive Belt Routing, Engine . . . . . . . . . 399
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . 216, 317
Driver Assistance Systems . . . . . . . . . 252
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 150
Driver Mode Control . . . . . . . . . . . . . . . . 222
Driver Mode Control Light . . . . . . . . . 146
Driving Assistance Systems . . . . . . . . . . . . . . . 262
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 281
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
For Better Fuel Economy . . . . . . . . . . . 27
Hill and Mountain Roads . . . . . . . . 194
If the Vehicle is Stuck . . . . . . . . . . . . 196
Loss of Control . . . . . . . . . . . . . . . . . . . . 193
Off-Road Recovery . . . . . . . . . . . . . . . . 192
Track Events and Competitive . . . 193

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
INDEX 429
Driving (cont'd)Vehicle Load Limits . . . . . . . . . . . . . . 197
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 193
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
E
Electric Parking Brake . . . . . . . . . . . . . . 218
Electric Parking Brake Light . . . . . . . 143
Electrical Equipment, Add-On . . . . . 287
Electrical System
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Fuses and Circuit Breakers . . . . . . . 322
Instrument Panel Fuse Block . . . . 330
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 304
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 139
Compartment Overview . . . . . . . . . . 292
Coolant Temperature Gauge . . . . . 135
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 146
Cooling System . . . . . . . . . . . . . . . . . . . 307 Engine (cont'd)
Drive Belt Routing . . . . . . . . . . . . . . . . 399
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Oil Life System . . . . . . . . . . . . . . . . . . . . 302
Oil Pressure Gauge . . . . . . . . . . . . . . . . 134
Oil Pressure Light . . . . . . . . . . . . . . . . . 147
Overheating . . . . . . . . . . . . . . . . . . . . . . . 312
Power Messages . . . . . . . . . . . . . . . . . . 156
Running While Parked . . . . . . . . . . . 210
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Engine Air Filter Life System . . . . . . 304
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 172
Equipment, Towing . . . . . . . . . . . . . . . . . 286
Event Data Recorders . . . . . . . . . . . . . . 412
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 172
Extended Parking . . . . . . . . . . . . . . . . . . . 209
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 82
Exterior Lamp Controls . . . . . . . . . . . . 166
Exterior Lamps Off Reminder . . . . . . 168
Exterior Lighting Battery Saver . . . . 173
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . 304 Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 168
Flashers, Hazard Warning . . . . . . . . . . 169
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 361
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
Fluid Automatic Transmission . . . . . . . . . 303
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 53
Forward Automatic Braking . . . . . . . . 264
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
Front Pedestrian Braking (FPB)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Front Seats Heated and Ventilated . . . . . . . . . . . . . 70
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Economy Driving . . . . . . . . . . . . . . . . . . . 27
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . . . . . . 280
Filling the Tank . . . . . . . . . . . . . . . . . . . 278
Foreign Countries . . . . . . . . . . . . . . . . . 278
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Low Fuel Warning Light . . . . . . . . . 148

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
430 INDEX
Fuel (cont'd)Management, Active . . . . . . . . . . . . . . 208
Prohibited Fuels . . . . . . . . . . . . . . . . . . 277
Recommended . . . . . . . . . . . . . . . . . . . . 277
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Fuses and Circuit Breakers . . . . . . . 322
Instrument Panel Fuse Block . . . . 330
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
G
Garage Door Opener . . . . . . . . . . . . . . . . 162Programming . . . . . . . . . . . . . . . . . . . . . . 162
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 320
Gauges Engine Coolant Temperature . . . . 135
Engine Oil Pressure . . . . . . . . . . . . . . . 134
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Speedometer . . . . . . . . . . . . . . . . . . . . . . 133
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 133
Trip Odometer . . . . . . . . . . . . . . . . . . . . 133
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Gauges (cont'd)
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . 126
Gear Shifting Light . . . . . . . . . . . . . . . . . 144
General Information
Service and Maintenance . . . . . . . . 381
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 289
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404
H
Hazard Warning Flashers . . . . . . . . . . 169
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 63
Head-up Display . . . . . . . . . . . . . . . . . . . . 152
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 169
Bulb Replacement . . . . . . . . . . . . . . . . 321
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 168
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 168
High-Beam On Light . . . . . . . . . . . . . . 148
High/Low Beam Changer . . . . . . . . . 168
Lamps On Reminder . . . . . . . . . . . . . . 149
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . 119 Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Heated and Ventilated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 53
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Heating . . . . . . . . . . . . . . . . . . . . . . . . .175, 180
High-Beam On Light . . . . . . . . . . . . . . . . 148
High-Speed Operation . . . . . . . . . . . . . . 347
Hill and Mountain Roads . . . . . . . . . . 194
Hill Start Assist (HSA) . . . . . . . . . . . . . 219
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
How to Wear Seat Belts Properly . . . 77
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . .175, 180
I
Ignition Positions . . . . . . . . . . . . . . . . . . . 201
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Indicator Pedestrian Ahead . . . . . . . . . . . . . . . . . 145
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 144
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Information
Publication Ordering . . . . . . . . . . . . . 410
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . 174

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-12533370) -
2019 - crc - 1/23/19
INDEX 431
Infotainment System . . . . . . . . . . . . . . . 413
Instrument Cluster . . . . . . . . . . . .127, 130
Instrument PanelStorage Area . . . . . . . . . . . . . . . . . . . . . . 114
Instrument Panel Overview . . . . . . . . . . . 6
Interior Rearview Mirrors . . . . . . . . . . . 54
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . 367
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . 29
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 341
Lamps Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Daytime Running (DRL) . . . . . . . . . . 168
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Exterior Controls . . . . . . . . . . . . . . . . . . 166
Exterior Lamps Off Reminder . . . . 168
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Lamps (cont'd)
On Reminder . . . . . . . . . . . . . . . . . . . . . . 149
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Lane Change Alert (LCA) . . . . . . . . . . . 271
Lane Departure
Warning (LDW) . . . . . . . . . . . . . . . . . . . 272
Lane Keep Assist (LKA) . . . . . . . . . . . . 273
Lane Keep Assist Light . . . . . . . . . . . . . 144
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 79
LATCH System Replacing Parts after a Crash . . . . 108
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . 102
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 321
Lighter, Cigarette . . . . . . . . . . . . . . . . . . . 125
Lighting
Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Illumination Control . . . . . . . . . . . . . . 170
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Lights Airbag Readiness . . . . . . . . . . . . . . . . . 138
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 143
Automatic Vehicle Hold . . . . . . . . . . 144
Brake System Warning . . . . . . 141, 142
Charging System . . . . . . . . . . . . . . . . . . 139 Lights (cont'd)
Check Engine (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 139
Cruise Control . . . . . . . . . . . . . . . . . . . . . 149
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Driver Mode Control . . . . . . . . . . . . . . 146
Electric Parking Brake . . . . . . . . . . . . 143
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 146
Engine Oil Pressure . . . . . . . . . . . . . . . 147
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 168
Gear Shifting . . . . . . . . . . . . . . . . . . . . . . 144
High-Beam On . . . . . . . . . . . . . . . . . . . . 148
High/Low Beam Changer . . . . . . . . . 168
Lane Keep Assist . . . . . . . . . . . . . . . . . . 144
Low Fuel Warning . . . . . . . . . . . . . . . . 148
Seat Belt Reminders . . . . . . . . . . . . . . 137
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Service Electric Parking Brake . . . 143
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 145
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 147
Traction Control System (TCS)/StabiliTrak . . . . . . . . . . . . . . . . 146
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 145
Locking Rear Axle . . . . . . . . . . . . . . . . . . 226
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 40
Delayed Locking . . . . . . . . . . . . . . . . . . . . 40