2019 CADILLAC XT4 heater

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
262 VEHICLE CARE
{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.
1. Electric Engine Cooling Fan(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 is filled with DEX-COOL engine
coolant mixture. This coolant needs to
be checked and changed at
appropriate levels. See Recommended
Fluids and Lubricants 0334 and
Maintenance Schedule 0326.
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 0265.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
VEHICLE CARE 263
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.
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 0265.
The coolant surge tank is in the
engine compartment on the driver
side of the vehicle. See Engine
Compartment Overview 0256.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
266 VEHICLE CARE
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.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
INDEX 369
Driving the Vehicle . . . . . . . . . . . . . . . . . . . . 3
Dual Automatic ClimateControl System . . . . . . . . . . . . . . . . . . . . 166
E
Electric Parking Brake . . . . . . . . . . . . . . 201
Electric Parking Brake Light . . . . . . . 136
Electrical Equipment, Add-On . . . . . 250
Electrical SystemEngine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Fuses and Circuit Breakers . . . . . . . 275
Instrument Panel Fuse Block . . . . 279
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Engine
Air Cleaner/Filter . . . . . . . . . . . . . . . . . 261
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 133
Compartment Overview . . . . . . . . . . 256
Coolant Temperature Gauge . . . . . 130
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 139
Cooling System . . . . . . . . . . . . . . . . . . . 262
Drive Belt Routing . . . . . . . . . . . . . . . . 339
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 Engine (cont'd)
Oil Life System . . . . . . . . . . . . . . . . . . . . 259
Oil Pressure Light . . . . . . . . . . . . . . . . . 140
Overheating . . . . . . . . . . . . . . . . . . . . . . . 265
Power Messages . . . . . . . . . . . . . . . . . . 148
Running While Parked . . . . . . . . . . . 194
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Engine Air Filter Life System . . . . . . 260
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 163
Equipment, Towing . . . . . . . . . . . . . . . . . 247
Event Data Recorders . . . . . . . . . . . . . . 352
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 164
Extended Parking . . . . . . . . . . . . . . . . . . . 192
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 79
Exterior Lamp Controls . . . . . . . . . . . . 158
Exterior Lamps Off Reminder . . . . . . 160
Exterior Lighting Battery Saver . . . . 164
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . 261
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 160
Flashers, Hazard Warning . . . . . . . . . . 161
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 322 Fluid
Automatic Transmission . . . . . . . . . 260
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 53
Forward Automatic Braking . . . . . . . . 228
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
Front Pedestrian Braking (FPB)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Front Seats Heated and Ventilated . . . . . . . . . . . . . 69
Front Storage . . . . . . . . . . . . . . . . . . . . . . . 111
Front Turn Signal Lamps . . . . . . . . . . 273
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Economy Driving . . . . . . . . . . . . . . . . . . . 26
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 239
Filling the Tank . . . . . . . . . . . . . . . . . . . 238
Foreign Countries . . . . . . . . . . . . . . . . . 237
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Low Fuel Warning Light . . . . . . . . . 140
Management, Active . . . . . . . . . . . . . . 192
Prohibited Fuels . . . . . . . . . . . . . . . . . . 237
Recommended . . . . . . . . . . . . . . . . . . . . 237

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
370 INDEX
Fuel (cont'd)Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Fuses Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Fuses and Circuit Breakers . . . . . . . 275
Instrument Panel Fuse Block . . . . 279
G
Garage Door Opener . . . . . . . . . . . . . . . . 154 Programming . . . . . . . . . . . . . . . . . . . . . . 154
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 272
Gauges Engine Coolant Temperature . . . . 130
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Speedometer . . . . . . . . . . . . . . . . . . . . . . 129
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 129
Trip Odometer . . . . . . . . . . . . . . . . . . . . 129
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . 125
General Information Service and Maintenance . . . . . . . . 324
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 253
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
H
Hazard Warning Flashers . . . . . . . . . . 161
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 62
Head-up Display . . . . . . . . . . . . . . . . . . . . 145
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 160
Bulb Replacement . . . . . . . . . . . . . . . . 273
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 160
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 160
High-Beam On Light . . . . . . . . . . . . . . 141
High/Low Beam Changer . . . . . . . . . 160
Lamps On Reminder . . . . . . . . . . . . . . 141
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Steering Wheel . . . . . . . . . . . . . . . . . . . . 117
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 54
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
High-Beam On Light . . . . . . . . . . . . . . . . 141
High-Speed Operation . . . . . . . . . . . . . . 290
Hill and Mountain Roads . . . . . . . . . . 178
Hill Start Assist (HSA) . . . . . . . . . . . . . 203
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255 Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
How to Wear Seat Belts Properly . . . 74
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
I
Ignition Positions . . . . . . . . . . . . . . . . . . . 184
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Indicator
Pedestrian Ahead . . . . . . . . . . . . . . . . . 137
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 137
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Information Publication Ordering . . . . . . . . . . . . . 349
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . 165
Infotainment System . . . . . . . . . . . . . . . 353
Instrument Cluster . . . . . . . . . . . . . . . . . 126
Instrument Panel Overview . . . . . . . . . . . 6
Interior Rearview Mirrors . . . . . . . . . . . 54
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . 309
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . 29
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28