2023 CADILLAC XT6 coolant temperature

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
376 Vehicle Care
{Warning
If part replacement is
necessary, the part must be
replaced with one of the
same part number or with an
equivalent part. Use of a
replacement part without
the same fit, form, and
function may result in
personal injury or damage to
the vehicle.
4. Inspect or replace the engine air cleaner/filter.
5. Reverse Steps 1–3 to reinstall the filter cover
housing.
6. If equipped, reset the engine air filter life system
after replacing the engine
air filter. See Engine Air
Filter Life System 0374.
{Warning
Operating the engine with
the air cleaner/filter off can
cause you or others to be
burned. Use caution when
working on the engine. Do
not start the engine or drive
the vehicle with the air
cleaner/filter off, as flames
may be present if the engine
backfires.
Caution
If 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
driving.
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
2.0L L4 Engine
1. Electric Engine Cooling
Fan (Out of View)
2. Coolant Surge Tank and Pressure Cap

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 377
3.6L V6 Engine
1. Electric Engine CoolingFan (Out of View)
2. Coolant Surge Tank and Pressure Cap
{Warning
An underhood electric fan
can start up even when the
engine is not running and
can cause injury. Keep
hands, clothing, and tools
away from any underhood
electric fan.
{Warning
Do not touch heater or
radiator hoses, or other
engine parts. They can be
very hot and can burn you.
Do not run the engine if
there is a leak; all coolant
could leak out. That could
cause an engine fire and can
burn you. Fix any leak before
driving the vehicle.
Engine Coolant
The engine cooling system in
the vehicle are filled with
DEX-COOL engine coolant
mixture. This coolant needs to
be checked and changed at
appropriate levels. See
Recommended Fluids and
Lubricants 0458 and
Maintenance Schedule 0454.
The following explains the
cooling systems and how to
check and add coolant when it
is low. If there is a problem
with engine overheating, see
Engine Overheating 0381.
What to Use
{Warning
Do not touch heater or
radiator hoses, or other
engine parts. They can be
very hot and can burn you.
Do not run the engine if
there is a leak; all coolant
could leak out. That could
cause an engine fire and can
burn you. Fix any leak before
driving the vehicle.
Use a 50/50 mixture of clean,
drinkable water and
DEX-COOL coolant. 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.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
378 Vehicle Care
.Helps keep the proper
engine temperature.
Caution
Do not use anything other
than a mix of DEX-COOL
coolant that meets GM
Standard GMW3420 and
clean, drinkable water.
Anything else can cause
damage to the engine
cooling system and the
vehicle, which would not be
covered by the vehicle
warranty.
Never dispose of engine
coolant by putting it in the
trash, pouring it on the
ground, or pouring 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.
Checking Coolant
The vehicle must be on a level
surface when checking the
coolant level.
Check to see if coolant is
visible in the coolant surge
tank. If the coolant inside the
coolant surge tank is boiling,
do not do anything else until it
cools down. If coolant is visible
but the coolant level mark is
not at or above the indicated
mark, add a 50/50 mixture of
clean, drinkable water and
DEX-COOL coolant. Be sure the cooling system is cool
before this is done. See
Engine Overheating
0381.
The coolant surge tank is
located in the engine
compartment on the driver
side of the vehicle. See Engine
Compartment Overview 0367.
How to Add Coolant to the
Surge Tank
{Warning
Spilling coolant on hot
engine parts can burn you.
Coolant contains ethylene
glycol and it will burn if the
engine parts are hot enough.
{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
(Continued)

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Vehicle Care 381
Engine Overheating
The vehicle has several
indicators to warn of the
engine overheating.
There is an engine coolant
temperature gauge on the
instrument cluster. See Engine
Coolant Temperature Gauge
0131. 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
Assistance Program 0470.
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.
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.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
382 Vehicle Care
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
The appropriate message will
appear in the Driver
Information Center (DIC) when
the fluid level is low.
Open the cap with the washer
symbol on it. Add washer fluid until the tank is full. See
Engine Compartment
Overview
0367 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.
.Do not mix water with
ready-to-use washer fluid.
Water can cause the
solution to freeze and
damage the washer fluid
tank and other parts of
the washer system.
.When using concentrated
washer fluid, follow the
manufacturer instructions
for adding water.
(Continued)

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
494 INDEX
Capacities andSpecifications . . . . . . . . . . . . . . . 463
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . 265
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . 25
Winter Driving . . . . . . . . . . . . . . 250
Cargo
Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Management System . . . . . 113
Tie-Downs . . . . . . . . . . . . . . . . . . . . 113
Caution, Danger, and
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . . . . . . . . . . . 109
Chains, Tire . . . . . . . . . . . . . . . . . . . 424
Charging System Light . . . . . . . . . . . . . . . . 134
Wireless . . . . . . . . . . . . . . . . . . . . . . . 123
Check Engine Light (Malfunction Indicator) . . . . 134
Child Restraints
Infants and YoungChildren . . . . . . . . . . . . . . . . . . . . . . . 86
Lower Anchors and Tethers for Children . . . . . . 92
Older Children . . . . . . . . . . . . . . . . 85
Securing . . . . . . . . . . . . . . . 102, 104
Systems . . . . . . . . . . . . . . . . . . . . . . . . 89 Child Safety Locks . . . . . . . . . . . . 24
Circuit Breakers . . . . . . . . . . . . . . 391
Cleaning
Exterior Care . . . . . . . . . . . . . . . 440
Interior Care . . . . . . . . . . . . . . . . 446
Climate Control Systems Dual Automatic . . . . . . . . . . . . . 228
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Cluster, Instrument . . . . . . . . . . 127
Collision Damage Repair . . . . . . . . . . . . . . . . . . . . . . . . . 474
Compact Spare Tire . . . . . . . . 433
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . 108
Compass . . . . . . . . . . . . . . . . . . . . . . . . 122
Connected Services
Connections . . . . . . . . . . . . . . . . 490
Diagnostics . . . . . . . . . . . . . . . . . . . 491
Navigation . . . . . . . . . . . . . . . . . . . 489
Connections
Connected Services . . . . . . 490
Control Traction andElectronic Stability . . . . . . . 276
Control of a Vehicle . . . . . . . . . 241
Controls Steering Wheel . . . . . . . . . . . . . 167 Convenience Net . . . . . . . . . . . . . .114
Convex Mirrors . . . . . . . . . . . . . . . . 37
Coolant
Engine TemperatureGauge . . . . . . . . . . . . . . . . . . . . . . . . 131
Cooling . . . . . . . . . . . . . . . . . . .228, 234
Cooling System . . . . . . . . . . . . . . 376
Cornering Lamps . . . . . . . . . . . . . .161
Courtesy Lamps . . . . . . . . . . . . . . .161
Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . 473
Cover Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Coverage Explanations . . . . . 194
Cruise Control . . . . . . . . . . . . . . . . 280 Adaptive . . . . . . . . . . . . . . . . . . . . . 283
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Super . . . . . . . . . . . . . . . . . . . . . . . . . 294
Cupholders . . . . . . . . . . . . . . . . . . . . . 108
Customer Assistance Offices . . . . . . . . . . . . . . . . . . . . . . . . 468
Text Telephone (TTY)Users . . . . . . . . . . . . . . . . . . . . . . . . 469
Customer Information
Publications OrderingInformation . . . . . . . . . . . . . . . . 476

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
496 INDEX
EmergencyOnStar . . . . . . . . . . . . . . . . . . . . . . . . 483
Engine Air Cleaner/Filter . . . . . . . . . . 375
Air Filter Life System . . . . . 374
Check Light(Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 134
Compartment Overview . . . . . . . . . . . . . . . . . . . 367
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 131
Cooling System . . . . . . . . . . . . 376
Drive Belt Routing . . . . . . . . . 465
Exhaust . . . . . . . . . . . . . . . . . . . . . . 265
Heater . . . . . . . . . . . . . . . . . . . . . . . . . 261
Oil Life System . . . . . . . . . . . . . 373
Oil Pressure Light . . . . . . . . . . 142
Overheating . . . . . . . . . . . . . . . . . . 381
Power Messages . . . . . . . . . . . 151
Running While Parked . . . 266
Starting . . . . . . . . . . . . . . . . . . . . . . 258
Entry Lighting . . . . . . . . . . . . . . . . . 162
Equipment, Towing . . . . . . . . . 356
Event Data Recorders . . . . . 480
Exit Lighting . . . . . . . . . . . . . . . . . . . 163
Extended Parking . . . . . . . . . . . 265
Extender, Seat Belt . . . . . . . . . . . 70 Exterior
Lamp Controls . . . . . . . . . . . . . . 156
Lamps Off Reminder . . . . . . 158
Lighting Battery Saver . . . 163
F
Filter
Engine Air Cleaner . . . . . . . . 375
Flash-to-Pass . . . . . . . . . . . . . . . . . . 158
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . 160
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 425
Changing . . . . . . . . . . . . . . . . . . . . . 426
Floor Mats . . . . . . . . . . . . . . . . . . . . . 450
Fluid AutomaticTransmission . . . . . . . . . . . . . . 374
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 384
Washer . . . . . . . . . . . . . . . . . . . . . . . 382
Folding Mirrors . . . . . . . . . . . . . . . . . 37
Forward Collision Alert (FCA)System . . . . . . . . . . . . . . . . . . . . . . 326
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . 477
Front
Heated and VentilatedSeats . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Front (cont'd)
Pedestrian Braking
(FPB) System . . . . . . . . . . . . . 330
Fuel Additives . . . . . . . . . . . . . . . . . . . . . 344
Economy, Driving forBetter . . . . . . . . . . . . . . . . . . . . . . . 239
Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . 346
Filling the Tank . . . . . . . . . . . . . 344
Foreign Countries . . . . . . . . . 344
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Management, Active . . . . . . 264
Prohibited Fuels . . . . . . . . . . . 344
Recommended . . . . . . . . . . . . . 343
Top Tier . . . . . . . . . . . . . . . . . . . . . . 342
Fuses Engine CompartmentFuse Block . . . . . . . . . . . . . . . . . 392
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 391
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . 396
Rear Compartment
Fuse Block . . . . . . . . . . . . . . . . . 398

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
INDEX 497
G
Garage Door Opener . . . . . . . . 152Programming . . . . . . . . . . . . . . . . 152
Gas Strut(s) . . . . . . . . . . . . . . . . . . . 388
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . 131
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Odometer . . . . . . . . . . . . . . . . . . . . . 130
Speedometer . . . . . . . . . . . . . . . . 130
Tachometer . . . . . . . . . . . . . . . . . . 130
Trip Odometer . . . . . . . . . . . . . . 130
Warning Lights and Indicators . . . . . . . . . . . . . . . . . . . 126
General Information Service andMaintenance . . . . . . . . . . . . . . 452
Towing . . . . . . . . . . . . . . . . . . . . . . . . 347
Vehicle Care . . . . . . . . . . . . . . . . 363
Global Positioning System (GPS) . . . . . . . . . . . . . . . . 192
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 108
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . 470
Guidance Problems with theRoute . . . . . . . . . . . . . . . . . . . . . . . . . 193
H
Hazard Warning
Flashers . . . . . . . . . . . . . . . . . . . . . . . 160
Head Restraints . . . . . . . . . . . . . . . 47
Head-Up Display (HUD) . . . . . 147
Headlamps Aiming . . . . . . . . . . . . . . . . . . . . . . . . 389
Automatic . . . . . . . . . . . . . . . . . . . . . 159
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . 159
Flash-to-Pass . . . . . . . . . . . . . . . . 158
High-Beam On Light . . . . . . . 143
High/Low Beam Changer . . . . . . . . . . . . . . . . . . . . . 158
Lamps On Reminder . . . . . . . 143
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Rear Seats . . . . . . . . . . . . . . . . . . . . 58
Steering Wheel . . . . . . . . . . . . . 118
Ventilated Front Seats . . . . 54
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . 261
Heating . . . . . . . . . . . . . . . . . . .228, 234
High-Beam On Light . . . . . . . . . 143
High-Speed Operation . . . . . . 410
Hill and Mountain Roads . . . . . . . . . . . . . . . . . . . . . . . . . 249
Hill Start Assist (HSA) . . . . . . .276 Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 63
HVAC . . . . . . . . . . . . . . . . . . . . .228, 234
I
If the System Needs Service . . . . . . . . . . . . . . . . . . . . . . . . . 194
Ignition Positions . . . . . . . . . . . . .257
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 35
Indicator Pedestrian Ahead . . . . . . . . . . 139
Vehicle Ahead . . . . . . . . . . . . . . . 139
Indicators Warning Lights andGauges . . . . . . . . . . . . . . . . . . . . . . . 126
Infants and Young Children, Restraints . . . . . . . . . 86
Information Publication Ordering . . . . . 476
Infotainment Using the System . . . . . . . . . . 168
Infotainment System . . . . . . . . 481
Inspection Multi-Point Vehicle . . . . . . . . 456
Instrument Cluster . . . . . . . . . . . 127