2016 CADILLAC CT6 coolant temperature

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Vehicle Care 275
3.6L V6 Engine
1. Screws (6)
2. Bolts (3)
3. Diagonal Brace
1. Remove the three bolts (2) and
the diagonal brace (3).
2. Remove the six screws (1) on
top of the engine air cleaner/
filter cover.
3. Lift the engine air cleaner/filter
cover open on the hinge.
4. Lift and remove the engine air
cleaner/filter.
5. Inspect or replace the engine
air cleaner/filter. 6. Reverse Steps 1 – 4 to reinstall
the engine air cleaner/filter
cover and diagonal brace.
{ WarningOperating the engine with the air
cleaner/filter off can cause you or
others to be burned. The air
cleaner not only cleans the air; it
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
CautionIf the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always
have the air cleaner/filter in place
when you are driving.
Cooling System The cooling system allows the
engine to maintain the correct
working temperature. 2.0L L4 Engine
1. Engine Coolant Surge Tank
and Pressure Cap
2. Engine Cooling Fan (Out
of View)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Vehicle Care 277
Engine Coolant The cooling system in the vehicle is
filled with DEX-COOL ®
engine
coolant. This coolant needs to be
checked and replaced at
appropriate intervals. See
Maintenance Schedule 0 344 .
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating 0 280 .
What to Use
{ WarningAdding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
mixture, the engine could get too
hot but you would not get the
(Continued) Warning (Continued) overheat warning. The engine
could catch fire and you or others
could be burned. Use a 50/
50 mixture of clean, drinkable
water and DEX-COOL coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
.
Gives freezing protection down
to − 37 °C ( − 34 °F), outside
temperature.
.
Gives boiling protection up to
129 °C (265 °F), engine
temperature.
.
Protects against rust and
corrosion.
.
Will not damage aluminum parts.
.
Helps keep the proper engine
temperature. CautionIf improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants 0 353 .
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or into sewers, streams,
or bodies of water. Have the coolant
changed by an authorized service
center, familiar with legal
requirements regarding used
coolant disposal. This will help
protect the environment and your
health.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
280 Vehicle Care 5. Replace the pressure cap
tightly.
6. Verify coolant level after the
engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1 – 6.
If the coolant still is not at the
proper level when the system
cools down again, see your
dealer.
CautionIf the pressure cap is not tightly
installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
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 0 128
and Engine Coolant Temperature
Warning Light 0 137 . The vehicle
may also display a message on the
Driver Information Center (DIC).
See Engine Cooling System
Messages 0 149 .
If the decision is made not to lift the
hood when this warning appears,
get service help right away. See
Roadside Service 0 364 .
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
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty. If Steam Is Coming from the
Engine Compartment
{ WarningSteam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
If you keep driving when the
engine is overheated, the liquids
in it can catch fire. You or others
could be badly burned. Stop the
engine if it overheats, and get out
of the vehicle until the engine
is cool.
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

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Vehicle Care 281too 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 0 265 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-9235592) -
2016 - crc - 11/6/15
Index 387Cleaning (cont'd)
Interior Care . . . . . . . . . . . . . . . . . . 338
Climate Control Systems
Automatic . . . . . . . . . . . . . . . . 178, 185
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Cluster, Instrument . . . . . . . . 118, 121
Collision Damage Repair . . . . . . . 368
Compact Spare Tire . . . . . . . . . . . . 326
Compartments
Storage . . . . . . . . . . . . . . . . . . . . . . . 106
Compass . . . . . . . . . . . . . . . . . . . . . . . 113
Messages . . . . . . . . . . . . . . . . . . . . 148
Connections
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 377
Control
Traction and Electronic
Stability . . . . . . . . . . . . . . . . . . . . . 217
Control of a Vehicle . . . . . . . . . . . . . 193
Convenience Net . . . . . . . . . . . . . . . 108
Convex Mirrors . . . . . . . . . . . . . . . . . . 48
Coolant
Engine . . . . . . . . . . . . . . . . . . . . . . . . 277
Engine Temperature Gauge . . 128
Engine Temperature
Warning Light . . . . . . . . . . . . . . . 137
Cooling System . . . . . . . . . . . . . . . . . 275
Engine Messages . . . . . . . . . . . . 149
Courtesy Lamps . . . . . . . . . . . . . . . . 174 Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . . 367
Cruise Control . . . . . . . . . . . . . . . . . . 220
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Messages . . . . . . . . . . . . . . . . . . . . 148
Cruise Control, Adaptive . . . . . . . . 223
Customer Assistance . . . . . . . . . . . 364
Offices . . . . . . . . . . . . . . . . . . . . . . . . 363
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 364
Customer Information
Service Publications
Ordering Information . . . . . . . . 370
Customer Satisfaction
Procedure . . . . . . . . . . . . . . . . . . . . . 361
D Damage Repair, Collision . . . . . . . 368
Danger, Warning, and Caution . . . . 2
Data Recorders, Event . . . . . . . . . 373
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . . . 172
Defensive Driving . . . . . . . . . . . . . . . 193
Delayed Locking . . . . . . . . . . . . . . . . . 39
Diagnostics
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 379
Distracted Driving . . . . . . . . . . . . . . . 192
Dome Lamps . . . . . . . . . . . . . . . . . . . 174 Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . 140
Ajar Messages . . . . . . . . . . . . . . . 148
Delayed Locking . . . . . . . . . . . . . . . . 39
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Power Locks . . . . . . . . . . . . . . . . . . . . 39
Rear Seat Pass-Through . . . . . . . 69
Drive Belt Routing, Engine . . . . . . 360
Drive Systems
All-Wheel Drive . . . . . . . . . . 213, 284
Driver Assistance Systems . . . . . 230
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . . 140
Driver Mode Control . . . . . . . . . . . . 219
Driving
Assistance Systems . . . . . . . . . . 237
Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 255
Defensive . . . . . . . . . . . . . . . . . . . . . 193
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 193
For Better Fuel Economy . . . . . . . 27
Hill and Mountain Roads . . . . . . 196
If the Vehicle is Stuck . . . . . . . . . 198
Loss of Control . . . . . . . . . . . . . . . 195
Off-Road Recovery . . . . . . . . . . . 194
Vehicle Load Limits . . . . . . . . . . . 198
Wet Roads . . . . . . . . . . . . . . . . . . . 195
Winter . . . . . . . . . . . . . . . . . . . . . . . . 197

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
388 Index E Electric Parking Brake . . . . . . . . . . 214
Electric Parking Brake Light . . . . 134
Electrical Equipment,
Add-On . . . . . . . . . . . . . . . . . . . . . . . 260
Electrical System
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 290
Fuses and Circuit Breakers . . . 290
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 293
Overload . . . . . . . . . . . . . . . . . . . . . 289
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 295
Emergency
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 376
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 273
Check and Service Engine
Soon Light . . . . . . . . . . . . . . . . . . 132
Compartment Overview . . . . . . . 265
Coolant . . . . . . . . . . . . . . . . . . . . . . . 277
Coolant Heater . . . . . . . . . . . . . . . 206
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 128 Engine (cont'd)
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . 137
Cooling System . . . . . . . . . . . . . . . 275
Cooling System Messages . . . 149
Drive Belt Routing . . . . . . . . . . . . 360
Exhaust . . . . . . . . . . . . . . . . . . . . . . 209
Oil Life System . . . . . . . . . . . . . . . 272
Oil Messages . . . . . . . . . . . . . . . . . 149
Oil Pressure Gauge . . . . . . . . . . 126
Oil Pressure Light . . . . . . . . . . . . 138
Overheating . . . . . . . . . . . . . . . . . . 280
Power Messages . . . . . . . . . . . . . 150
Running While Parked . . . . . . . . 210
Starting . . . . . . . . . . . . . . . . . . . . . . . 204
Engine Oil
Temperature Gauge . . . . . . . . . . 127
Entry Lighting . . . . . . . . . . . . . . . . . . . 175
Equipment, Towing . . . . . . . . . . . . . 259
Event Data Recorders . . . . . . . . . . 373
Exit Lighting . . . . . . . . . . . . . . . . . . . . 176
Extender, Safety Belt . . . . . . . . . . . . 75
Exterior Lamp Controls . . . . . . . . . 170
Exterior Lamps Off Reminder . . . 172
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . 176 F Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . 273
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 172
Flashers, Hazard Warning . . . . . . 173
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 320
Changing . . . . . . . . . . . . . . . . . . . . . 321
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 341
Fluid
Automatic Transmission . . . . . . 273
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 283
Washer . . . . . . . . . . . . . . . . . . . . . . . 281
Forward Collision Alert
(FCA) System . . . . . . . . . . . . . . . . . 237
Frequency Statement
Radio . . . . . . . . . . . . . . . . . . . . . . . . . 371
Front Automatic Braking
(FAB) System . . . . . . . . . . . . . . . . . 240
Front Pedestrian Braking
(FPB) System . . . . . . . . . . . . . . . . . 241
Front Seats
Heated and Ventilated . . . . . . . . . . 64
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Additives . . . . . . . . . . . . . . . . . . . . . 253
Economy Driving . . . . . . . . . . . . . . . 27

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Index 389Fuel (cont'd)
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 255
Filling the Tank . . . . . . . . . . . . . . . 253
Foreign Countries . . . . . . . . . . . . 253
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 124
Low Fuel Warning Light . . . . . . . 138
Requirements, California . . . . . 253
System Messages . . . . . . . . . . . . 150
Fuses
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 290
Fuses and Circuit Breakers . . . 290
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 293
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 295
G Garage Door Opener . . . . . . . . . . . 166
Programming . . . . . . . . . . . . . . . . . 166
Gauges
Boost . . . . . . . . . . . . . . . . . . . . . . . . . 125
Engine Coolant
Temperature . . . . . . . . . . . . . . . . 128
Engine Oil Pressure . . . . . . . . . . 126
Engine Oil Temperature . . . . . . . 127
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Odometer . . . . . . . . . . . . . . . . . . . . . 124 Gauges (cont'd)
Speedometer . . . . . . . . . . . . . . . . . 123
Tachometer . . . . . . . . . . . . . . . . . . . 124
Trip Odometer . . . . . . . . . . . . . . . . 124
Voltmeter . . . . . . . . . . . . . . . . . . . . . 129
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . .117
General Information
Service and Maintenance . . . . . 342
Towing . . . . . . . . . . . . . . . . . . . . . . . . 255
Vehicle Care . . . . . . . . . . . . . . . . . . 262
Glove Box . . . . . . . . . . . . . . . . . . . . . . 106
H Hazard Warning Flashers . . . . . . . 173
Head Restraints . . . . . . . . . . . . . . . . . 58
Head-up Display . . . . . . . . . . . . . . . . 143
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . 287
Automatic . . . . . . . . . . . . . . . . . . . . . 172
Bulb Replacement . . . . . . . . . . . . 288
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . 172
Flash-to-Pass . . . . . . . . . . . . . . . . . 172
High-Beam On Light . . . . . . . . . . 139
High/Low Beam Changer . . . . . 172
Lamps On Reminder . . . . . . . . . 139
Heated
Steering Wheel . . . . . . . . . . . . . . . . 111 Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Heated and Ventilated Rear
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Heated Mirrors . . . . . . . . . . . . . . . . . . . 49
Heater
Engine Coolant . . . . . . . . . . . . . . . 206
Heating and Air
Conditioning . . . . . . . . . . . . . . 178, 185
High-Beam On Light . . . . . . . . . . . . 139
High-Speed Operation . . . . . . . . . . 308
Hill and Mountain Roads . . . . . . . . 196
Hill Start Assist (HSA) . . . . . . . . . . 216
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
How to Wear Safety Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 71
I Ignition Positions . . . . . . . . . . . . . . . 202
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 46
Indicator
Pedestrian Ahead . . . . . . . . . . . . 136
Vehicle Ahead . . . . . . . . . . . . . . . . 136
Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . . 90
Infotainment . . . . . . . . . . . . . . . . . . . . 177
Infotainment System . . . . . . . . . . . . 374
Instrument Cluster . . . . . . . . . 118, 121

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
390 Index Instrument Panel
Storage Area . . . . . . . . . . . . . . . . . 106
Instrument Panel Overview . . . . . . . 6
Interior Rearview Mirrors . . . . . . . . . 49
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . . . 327
K Key and Lock Messages . . . . . . . . 150
Keyless Entry
Remote (RKE) System . . . . . . . . . 29
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
L Labeling, Tire Sidewall . . . . . . . . . . 301
Lamps
Courtesy . . . . . . . . . . . . . . . . . . . . . . 174
Daytime Running (DRL) . . . . . . 172
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 174
Exterior Controls . . . . . . . . . . . . . . 170
Exterior Lamps Off
Reminder . . . . . . . . . . . . . . . . . . . 172
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . 176
License Plate . . . . . . . . . . . . . . . . . 288
Malfunction Indicator . . . . . . . . . 132
Messages . . . . . . . . . . . . . . . . . . . . 151 Lamps (cont'd)
On Reminder . . . . . . . . . . . . . . . . . 139
Reading . . . . . . . . . . . . . . . . . . . . . . 175
Lane Change Alert (LCA) . . . . . . . 246
Lane Departure
Warning (LDW) . . . . . . . . . . . . . . . . 248
Lane Keep Assist (LKA) . . . . . . . . 248
Lane Keep Assist Light . . . . . . . . . 135
Lap-Shoulder Belt . . . . . . . . . . . . . . . 72
LATCH System
Replacing Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . 100
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . 95
LED Lighting . . . . . . . . . . . . . . . . . . . . 288
Light, Auto Stop Mode . . . . . . . . . . 139
Lighting
Entry . . . . . . . . . . . . . . . . . . . . . . . . . 175
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Illumination Control . . . . . . . . . . . 174
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Airbag Readiness . . . . . . . . . . . . . 130
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . 135
Brake System Warning . . . . . . . 133
Charging System . . . . . . . . . . . . . 131
Cruise Control . . . . . . . . . . . . . . . . 140 Lights (cont'd)
Door Ajar . . . . . . . . . . . . . . . . . . . . . 140
Electric Parking Brake . . . . . . . . 134
Engine Coolant
Temperature Warning . . . . . . . 137
Engine Oil Pressure . . . . . . . . . . 138
Flash-to-Pass . . . . . . . . . . . . . . . . . 172
High-Beam On . . . . . . . . . . . . . . . . 139
High/Low Beam Changer . . . . . 172
Low Fuel Warning . . . . . . . . . . . . 138
Safety Belt Reminders . . . . . . . . 129
Security . . . . . . . . . . . . . . . . . . . . . . 139
Service Electric Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . 134
StabiliTrak ®
OFF . . . . . . . . . . . . . 136
Tire Pressure . . . . . . . . . . . . . . . . . 137
Traction Control System
(TCS)/StabiliTrak ®
. . . . . . . . . . 137
Traction Off . . . . . . . . . . . . . . . . . . . 136
Locks
Automatic Door . . . . . . . . . . . . . . . . . 39
Delayed Locking . . . . . . . . . . . . . . . . 39
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Lockout Protection . . . . . . . . . . . . . . 39
Power Door . . . . . . . . . . . . . . . . . . . . . 39
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Loss of Control . . . . . . . . . . . . . . . . . 195
Low Fuel Warning Light . . . . . . . . . 138