2021 CADILLAC XT5 engine overheat

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
292 VEHICLE CARE
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 293
California Proposition65 Warning . . . . . . . . . . . . . . . . . . . . . 293
California Perchlorate Materials Requirements . . . . . . . . . . . . . . . . . . . 293
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 294
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 294
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 296
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 299
Engine Oil Life System . . . . . . . . . . . 301
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Engine Air Filter Life System . . . . 302
Engine Air Cleaner/Filter . . . . . . . . . 303
Cooling System . . . . . . . . . . . . . . . . . . . 304
Engine Overheating . . . . . . . . . . . . . . 308
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 309
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 311
Battery - North America . . . . . . . . . 312
All-Wheel Drive . . . . . . . . . . . . . . . . . . 312 Park Brake and P (Park)
Mechanism Check . . . . . . . . . . . . . . 313
Wiper Blade Replacement . . . . . . . 313
Windshield Replacement . . . . . . . . 314
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 314
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . 315
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 315
LED Lighting . . . . . . . . . . . . . . . . . . . . . 315
Electrical System
Electrical System Overload . . . . . . 316
Fuses and Circuit Breakers . . . . . . 316
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Instrument Panel Fuse Block . . . . 320
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
All-Season Tires . . . . . . . . . . . . . . . . . . 325
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 326
Summer Tires . . . . . . . . . . . . . . . . . . . . 326
Tire Sidewall Labeling . . . . . . . . . . . 327
Tire Designations . . . . . . . . . . . . . . . . . 328
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . . . . . 329
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 331 Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . . . . . . . 333
Tire Pressure Monitor System . . . 334
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 335
Tire Inspection . . . . . . . . . . . . . . . . . . . 338
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 339
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Buying New Tires . . . . . . . . . . . . . . . . 341
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Uniform Tire Quality Grading . . . 342
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 344
Wheel Replacement . . . . . . . . . . . . . . 344
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 344
If a Tire Goes Flat . . . . . . . . . . . . . . . . 345
Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 347
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 352
Tire Changing . . . . . . . . . . . . . . . . . . . . . 353
Compact Spare Tire . . . . . . . . . . . . . . 358
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . . . 359

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
VEHICLE CARE 305
3.6L V6 Engine
1. Electric Engine Cooling Fan (Outof 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 is filled with DEX-COOL engine
coolant mixture. This coolant needs to
be checked and changed at
appropriate levels. See Recommended
Fluids and Lubricants 0383 and
Maintenance Schedule 0374.
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 0308.
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.
.Helps keep the proper engine
temperature.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
306 VEHICLE CARE
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 0308.
The coolant surge tank is in the
engine compartment on the driver
side of the vehicle. See Engine
Compartment Overview 0296.
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 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.
Caution
Failure to follow the specific
coolant fill procedure could cause
the engine to overheat and could
(Continued)

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
308 VEHICLE CARE
1. With a cold system, disconnect thevent line from the port near the
cap on the surge tank. Add coolant
to the indicated mark on the
surge tank.
2. Reconnect the vent line to the surge tank and replace the cap on
the surge tank.
3. Connect the vehicle to a battery charger.
4. Put the vehicle in Service Mode. See Ignition Positions 0224.
5. Turn off the air conditioning.
6. Set the parking brake. 7. At the same time, press the
accelerator and the brake for
automatic transmission vehicles for
two seconds, then release.
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 Engine Control
Module (ECM) to go to sleep, about
two minutes, and repeat steps 3-7.
Listen for pump activation and
movement of the control valves while
watching the level of the tank. If the
tank empties, turn the ignition off,
carefully remove the surge tank cap,
refill to the indicated mark and repeat
steps 3-6. The fill and air removal
process will run for approximately
10 minutes.
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 0106. 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 0396.
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.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
VEHICLE CARE 309
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.
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 0296 for reservoir location.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
416 INDEX
Door (cont'd)Power Locks . . . . . . . . . . . . . . . . . . . . . . . . 17
Drive Belt Routing, Engine . . . . . . . . . 391
Drive Systems All-Wheel Drive . . . . . . . . . . . . . 237, 312
Driver Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Driver Assistance Systems . . . . . . . . . 254
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 117
Driver Mode Control . . . . . . . . . . . . . . . . 242
Driver Mode Control Light . . . . . . . . . 114
Driving Assistance Systems . . . . . . . . . . . . . . . 264
Better Fuel Economy . . . . . . . . . . . . . 210
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 279
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Hill and Mountain Roads . . . . . . . . 218
If the Vehicle is Stuck . . . . . . . . . . . . 220
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Loss of Control . . . . . . . . . . . . . . . . . . . . 213
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Off-Road Recovery . . . . . . . . . . . . . . . . 213
Vehicle Load Limits . . . . . . . . . . . . . . 220
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 217
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218 Dual Automatic Climate
Control System . . . . . . . . . . . . . . . . . . . . 201
E
Electric Brake Boost . . . . . . . . . . . . . . . . 237
Electric Parking Brake . . . . . . . . . . . . . . 238
Electric Parking Brake Light . . . . . . . 110
Electrical Equipment, Add-On . . . . . 290
Electrical System
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Fuses and Circuit Breakers . . . . . . . 316
Instrument Panel Fuse Block . . . . 320
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 303
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 108
Compartment Overview . . . . . . . . . . 296
Coolant Temperature Gauge . . . . . 106
Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . 114
Cooling System . . . . . . . . . . . . . . . . . . . 304
Drive Belt Routing . . . . . . . . . . . . . . . . 391 Engine (cont'd)
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Oil Life System . . . . . . . . . . . . . . . . . . . . 301
Oil Pressure Light . . . . . . . . . . . . . . . . . 115
Overheating . . . . . . . . . . . . . . . . . . . . . . . 308
Power Messages . . . . . . . . . . . . . . . . . . 123
Running While Parked . . . . . . . . . . . 231
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Engine Air Filter Life System . . . . . . 302
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 137
Equipment, Towing . . . . . . . . . . . . . . . . . 286
Event Data Recorders . . . . . . . . . . . . . . 403
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 137
Extended Parking . . . . . . . . . . . . . . . . . . . 231
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 54
Exterior Lamp Controls . . . . . . . . . . . . 132
Exterior Lamps Off Reminder . . . . . . 134
Exterior Lighting Battery Saver . . . . 138
F
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . 303
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 134
Flashers, Hazard Warning . . . . . . . . . . 135
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 371

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14590481) - 2021 - CRC - 10/22/20
420 INDEX
Oil (cont'd)Pressure Light . . . . . . . . . . . . . . . . . . . . . 115
Older Children, Restraints . . . . . . . . . . . 67
Online Owner Center . . . . . . . . . . . . . . . 395
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404
OnStar Additional Information . . . . 406
OnStar Emergency . . . . . . . . . . . . . . . . . . 406
OnStar Overview . . . . . . . . . . . . . . . . . . . . 405
OnStar Security . . . . . . . . . . . . . . . . . . . . . 406
OnStar System . . . . . . . . . . . . . . . . .154, 165
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Overheating, Engine . . . . . . . . . . . . . . . . 308
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Instrument Panel . . . . . . . . . . . . . . . . . . . . 4
P
ParkShifting Into . . . . . . . . . . . . . . . . . . . . . . 229
Shifting Out of . . . . . . . . . . . . . . . . . . . . 230
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Parking Brake and P (Park)Mechanism Check . . . . . . . . . . . . . . . 313
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Over Things That Burn . . . . . . . . . . . 230
Parking or Backing Assistance Systems . . . . . . . . . . . . . . . 256 Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Passenger Sensing System . . . . . . . . . . 61
Pedestrian Ahead Indicator . . . . . . . . 113
Perchlorate Materials Requirements, California . . . . . . . . . 293
Performance Shifting Light . . . . . . . . 111
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Phone Apple CarPlay andAndroid Auto . . . . . . . . . . . . . . . . . . . . 179
Bluetooth . . . . . . . . . . . . . . . . . . . . 174, 175
Port
USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Positioning Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Protection, Battery . . . . . . . . . . . . . . . . 138
Retained Accessory (RAP) . . . . . . . . 229
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Pregnancy, Using Seat Belts . . . . . . . . . 54 Privacy
Vehicle Data Recording . . . . . . . . . . 403
Problems with Route Guidance . . . . 167
Program Courtesy Transportation . . . . . . . . . 398
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . 276
Proposition 65 Warning,
California . . . . . . . . . . . . . . .293, 312, 359, Back Cover
Publication Ordering
Information . . . . . . . . . . . . . . . . . . . . . . . . 401
R
RadioHD Radio Technology . . . . . . . . . . . . 148
Radio Data System (RDS) . . . . . . . . . . 148
Radio Frequency Statement . . . . . . . . 401
Radio Reception . . . . . . . . . . . . . . . . . . . . 149
Radios AM-FM Radio . . . . . . . . . . . . . . . . . . . . . 146
Satellite . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Reading Lamps . . . . . . . . . . . . . . . . . . . . . 137
Rear Camera Mirror . . . . . . . . . . . . . . . . . 31
Rear Climate Control System . . . . . . 206
Rear Pedestrian Alert . . . . . . . . . . . . . . . 263
Rear Seat Armrest . . . . . . . . . . . . . . . . . . . 47
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45