2023 CADILLAC XT4 radiator

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Driving and Operating 251
When thehindicator is
illuminated, the system is
enabled.
Winter Cover
If equipped, the winter cover
can be used to enhance
heater performance in
extremely cold conditions
below −0 °C (32 °F). The winter
cover installs over the grille
and restricts airflow to the
engine compartment.
Usage Guidelines
The winter cover should only
be used while operating the
vehicle in extremely cold
temperatures or in heavy
snow for extended periods. In
these temperatures, the
vehicle does not need a large
amount of air to properly cool
the engine. When more airflow
is required to cool the vehicle,
the winter cover should not be
used. The following usage
guidelines will allow adequate
airflow for proper radiator and
air cooler performance:
.Do not use the winter cover
if towing a trailer. The
vehicle may overheat if the
radiator is covered while
towing.
.Do not modify the cover. The
winter cover does not cover
some sections of the front
of the vehicle to provide
enough airflow.
.Keep the underside of the
winter cover as clean as
possible. Remove monthly or
as necessary and clean away
dust and debris.
.Do not use the winter cover
above −0 °C (32 °F).
Use only a mild soap to clean.
Do not use harsh soap, strong
detergents, or vinyl
protectant/sealant type
products as they may damage
the special finish. Allow the
winter cover to dry completely
before reinstalling.
Installation Instructions
When first trying to fit the
cover, it may appear to be
undersized but will stretch
during installation to ensure a
tight fit. The initial installation
of the cover is best performed
when the winter cover
is warm.
1. Center grille cover and make sure that it is
positioned correctly.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 339
{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
Lubricants0429 and
Maintenance Schedule 0425.
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 0342.
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.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
340 Vehicle Care
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 surethe cooling system is cool
before this is done. See
Engine Overheating
0342.
The coolant surge tank is in
the engine compartment on
the driver side of the vehicle.
See Engine Compartment
Overview 0331.
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)
Warning (Continued)
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 cause
system damage. If coolant is
not visible in the surge tank,
contact your dealer.
The coolant surge tank
pressure cap can be removed
when the cooling system,
including the surge tank
pressure cap and upper
radiator hose, is no longer hot.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
470 INDEX
PrivacyVehicle Data
Recording . . . . . . . . . . . . . . . . . . 448
Problems with Route Guidance . . . . . . . . . . . . . . . . . . . . . . 186
Program Courtesy
Transportation . . . . . . . . . . . 442
Prohibited Fuels . . . . . . . . . . . . . . 310
Proposition 65 Warning California . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Proposition 65 Warning, California . . . 404
Publication Ordering Information . . . . . . . . . . . . . . . . . . 445
R
Radiator . . . . . . . . . . . . . . . . . . . . . . . . 338
RadioAM-FM Radio . . . . . . . . . . . . . . . . 163
Data System (RDS) . . . . . . . . . 167
Frequency Statement . . . . 446
HD Radio Technology . . . . . 166
Reception . . . . . . . . . . . . . . . . . . . . . 168
Satellite . . . . . . . . . . . . . . . . . . . . . . . 167
Reading Lamps . . . . . . . . . . . . . . . 153
Rear
Camera Mirror . . . . . . . . . . . . . . . . 37 Rear (cont'd)
Cross Traffic Alert
(RCTA) System . . . . . . . . . . . . 297
Heated Seats . . . . . . . . . . . . . . . . . 56
Pedestrian Alert . . . . . . . . . . . 296
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Storage . . . . . . . . . . . . . . . . . . . . . . . 103
Vision Camera (RVC) . . . . . 286
Window Washer/Wiper . . . 113
Rearview Mirrors . . . . . . . . . . . . . . 36 Automatic Dimming . . . . . . . . . 36
Reclining Seatbacks . . . . . . . . . . 47
Recognition
Voice . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Recommended Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Recommended Fluids and Lubricants . . . . . . . . . . . . . 429
Records Maintenance . . . . . . . . . . . . . . . . . 431
Recreational Vehicle
Towing . . . . . . . . . . . . . . . . . . . . . . . . 409
Reimbursement Program, GM Mobility . . . . 439
Remote Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Key Operation . . . . . . . . . . . . . . . . . . 9
Vehicle Start . . . . . . . . . . . . . . . . . . . 18 Replacement Parts
Airbags . . . . . . . . . . . . . . . . . . . . . . . . . 78
Maintenance . . . . . . . . . . . . . . . . 430
Replacing Airbag System . . . . . . . . . . . . . . . 78
LATCH System PartsAfter a Crash . . . . . . . . . . . . . . . 95
Seat Belt System Parts after a Crash . . . . . . . . . . . . . . . . 65
Reporting Safety Defects Canadian Government . . . 447
General Motors . . . . . . . . . . . . 447
U.S. Government . . . . . . . . . . 447
Restraints Where to Put . . . . . . . . . . . . . . . . . 85
Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . . 253
Reverse Automatic Braking . . . . . . . . . . . . . . . . . . . . . . . . 294
Reverse Tilt Mirrors . . . . . . . . . . 36
Roads Driving, Wet . . . . . . . . . . . . . . . . . 238
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . 439
Roof
Rack System . . . . . . . . . . . . . . . . . 106
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . 42
Rotation, Tires . . . . . . . . . . . . . . . . 381