2024 CADILLAC XT4 overheating

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17180837) - 2024 - CRC - 2/28/23
Vehicle Care 269
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, seeEngine Overheating 0271.
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 0271.
The coolant surge tank is in the engine
compartment on the driver side of the
vehicle. See Engine Compartment Overview
0 263.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17180837) - 2024 - CRC - 2/28/23
Vehicle Care 271
4. Turn the ignition to Service Mode. SeeIgnition Positions 0174.
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
Electronic Control Module (ECM) to go to
sleep, about 2 minutes, and repeat Steps 3-7.
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
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 099. 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
0 343.
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.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17180837) - 2024 - CRC - 2/28/23
286 Vehicle Care
FusesUsage
F16 Cargo APO –Cargo
Auxiliary Power Outlet
F17 Sensing Diagnostic Module (SDM)/Safety 1
F18 RC MISC 1/MISC 2 –Ride
Control Miscellaneous 1/
Miscellaneous 2
F19 Exterior Lighting Module (ELM) TR6
F20 Central Gateway Module(CGM)/Telematics
(OnStar)
F21 –
F22 European Trailer
F23 Auxiliary Power Outlet (APO) Cigar
F24 Wireless Charger F25 USB
F26 ELM 6 –Exterior Lighting
Module 6
F27 VCU AUX JACK –Vehicle
Communication Unit
Auxiliary Jack Fuses
Usage
F28 ELM 7– Exterior Lighting
Module 7
F29 –
F30 –
F31 BCM 3 –Body Control
Module 3
F32 HSWM –Heated Steering
Wheel Module
F33 –
F34 STEERING CLMN ADJ MDL –
Steering Column Adjacent
Module
F35 Amplifier
F36 DC/DC BATT 2 F37 –
F38 –
F39 BCM 4 –Body Control
Module 4
F40 – Relay
Usage
CB01 Auxiliary Power Outlet
(APO) Row 2
CB02 Auxiliary Power Outlet
(APO) Row 1
Wheels and Tires
Tires
Every new GM vehicle has high-quality
tires made by a leading tire
manufacturer. See the warranty manual
for information regarding the tire
warranty and where to get service. For
additional information refer to the tire
manufacturer.
{Warning
.Poorly maintained and improperly
used tires are dangerous.
.Overloading the tires can cause
overheating as a result of too
much flexing. There could be a
blowout and a serious crash. See
Vehicle Load Limits
0170.
(Continued)

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17180837) - 2024 - CRC - 2/28/23
292 Vehicle Care
Speed Rating:An alphanumeric code
assigned to a tire indicating the
maximum speed at which a tire can
operate.
Traction
:The friction between the tire
and the road surface. The amount of
grip provided.
Tread
:The portion of a tire that comes
into contact with the road.
Treadwear Indicators
:Narrow bands,
sometimes called wear bars, that show
across the tread of a tire when only
1.6 mm (1/16 in) of tread remains. See
When It Is Time for New Tires 0298.
UTQGS (Uniform Tire Quality Grading
Standards)
:A tire information system
that provides consumers with ratings
for a tire's traction, temperature, and
treadwear. Ratings are determined by
tire manufacturers using government
testing procedures. The ratings are
molded into the sidewall of the tire.
See Uniform Tire Quality Grading 0301. Vehicle Capacity Weight
:The number
of designated seating positions
multiplied by 68 kg (150 lbs) plus the
rated cargo load. See Vehicle Load
Limits 0170.
Vehicle Maximum Load on the Tire
:
Load on an individual tire due to curb
weight, accessory weight, occupant
weight, and cargo weight.
Vehicle Placard
:A label permanently
attached to a vehicle showing the
vehicle's capacity weight and the
original equipment tire size and
recommended inflation pressure. See
“Tire and Loading Information Label”
under Vehicle Load Limits 0170.
Tire Pressure
Tires need the correct amount of air
pressure to operate effectively.
{Warning
Neither tire underinflation nor
overinflation is good. Underinflated
tires, or tires that do not have
enough air, can result in:
.Tire overloading and overheating,
which could lead to a blowout
.Premature or irregular wear
.Poor handling
.Reduced fuel economy for
internal combustion engine
vehicles
.Reduced range for electric vehicles
Overinflated tires, or tires that have
too much air, can result in:
.Unusual wear
.Poor handling
.Rough ride
.Needless damage from road
hazards

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17180837) - 2024 - CRC - 2/28/23
Index 363
Data CollectionInfotainment System . . . . . . . . . . . . . . . . . . 351
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 350
Daytime Running Lamps (DRL) . . . . . . . . . . . .124
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . 164
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 359
Disabled Vehicle
Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . 164
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 17
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Drive Belt Routing, Engine . . . . . . . . . . . . . . . 339
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . . . . . . 186, 275
Driver
Assistance Systems, Advanced . . . . . . . . . 223
Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Information Center (DIC) . . . . . . . . . . . . . . . . 111 Driver (cont'd)
Mode Control . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Mode Control Light . . . . . . . . . . . . . . . . . . . . 108
Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Driving Assistance Systems . . . . . . . . . . . . . . . . . . . . 233
Better Fuel Economy . . . . . . . . . . . . . . . . . . . 163
Characteristics and Towing Tips . . . . . . . . 250
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Hill and Mountain Roads . . . . . . . . . . . . . . 167
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 169
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 166
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 166
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 170
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Driving the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . .2
Dual Automatic Climate Control System . . . . . 157
E
Electric
Brake Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Parking Brake Light . . . . . . . . . . . . . . . . . . . . 104 Electrical
Equipment, Add-On . . . . . . . . . . . . . . . . . . . . 259
System Overload . . . . . . . . . . . . . . . . . . . . . . 279
Electrical System Engine Compartment Fuse Block . . . . . . . 281
Fuses and Circuit Breakers . . . . . . . . . . . . . 280
Instrument Panel Fuse Block . . . . . . . . . . . 284
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 267
Air Filter Life System . . . . . . . . . . . . . . . . . . 267
Check Light (Malfunction Indicator) . . . . 102
Compartment Overview . . . . . . . . . . . . . . . . 263
Coolant Temperature Gauge . . . . . . . . . . . . 99
Coolant Temperature WarningLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 268
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 339
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 266
Oil Pressure Gauge . . . . . . . . . . . . . . . . . . . . . 98
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . 109
Oil Temperature Gauge . . . . . . . . . . . . . . . . . 99
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17180837) - 2024 - CRC - 2/28/23
Index 367
Mirrors (cont'd)Automatic Dimming Rearview . . . . . . . . . . 29
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Interior Rearview . . . . . . . . . . . . . . . . . . . . . . . 28
Manual Rearview . . . . . . . . . . . . . . . . . . . . . . . 28
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Rear Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Mode Driver Control . . . . . . . . . . . . . . . . . . . . . . . . . 190
Monitor System, Tire Pressure . . . . . . . . . . . 294
Multi-band Antenna . . . . . . . . . . . . . . . . . . . . . .138
Multi-Point Vehicle Inspection (MPVI) . . . . 332
N
Navigation Connected Services . . . . . . . . . . . . . . . . . . . . 357
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Using the System . . . . . . . . . . . . . . . . . . . . . . 139
New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . . 173
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Engine Oil Life System . . . . . . . . . . . . . . . . . 266
Engine Oil Pressure Gauge . . . . . . . . . . . . . . 98
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . 109
Older Children, Restraints . . . . . . . . . . . . . . . . . 63
Online Account . . . . . . . . . . . . . . . . . . . . . . . . . . 342
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 Additional Information . . . . . . . . . . . . . . . . . 354
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
OnStar Emergency . . . . . . . . . . . . . . . . . . . . . . . 353
OnStar Security . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Overheating, Engine . . . . . . . . . . . . . . . . . . . . . . 271
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . 5
P
ParkAssist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224, 227
Shifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . 180
Parking Brake and P (Park) MechanismCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Over Things That Burn . . . . . . . . . . . . . . . . . 180 Parking Assist
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Parking or Backing Assistance Systems . . . . . . . . . . . . . . . . . . . . 224
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . 101
Compartment Air Filter . . . . . . . . . . . . . . . . . 161
Sensing System . . . . . . . . . . . . . . . . . . . . . . . . . 58
Pedestrian Ahead Indicator . . . . . . . . . . . . . . 106
Perchlorate Materials Requirements, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Performance Shifting Light . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Phone Apple CarPlay and Android Auto . . . . . . . 148
Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . 144, 145
Port USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Positioning Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Power
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Protection, Battery . . . . . . . . . . . . . . . . . . . . . 129
Retained Accessory (RAP) . . . . . . . . . . . . . . 179
Seat Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 37
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31