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Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 1/4/22
270 DRIVING AND OPERATING
How the System Works
LKA uses a camera sensor installed on
the windshield ahead of the rearview
mirror to detect lane markings. It may
provide brief steering assist if it
detects an unintended lane departure.
It may further provide an audible alert
or the driver seat may pulse indicating
that a lane marking has been crossed.
The system does not provide a Lane
Departure Warning (LDW) when
intentionally steering across a lane
marker.
To turn LKA on and off, press
Aon
the center stack. If equipped, the
indicator light on the button comes
on when LKA is on and turns off
when LKA is disabled. In some
vehicles a long press of over
three seconds is required to turn
LKA off.
When on,
Ais white, if equipped,
indicating that the system is not ready
to assist.
Ais green if LKA is ready
to assist. LKA may assist by gently
turning the steering wheel if the
vehicle approaches a detected lane
marking.
Ais amber when assisting. It may also provide a Lane
Departure Warning (LDW) alert by
flashing
Aamber if the vehicle
crosses a detected lane marking.
Additionally, there may be three
beeps, or the driver seat may pulse
three times, on the right or left,
depending on the lane departure
direction.
Take Steering
The LKA system does not
continuously steer the vehicle. If LKA
does not detect active driver steering,
an alert and chime may be provided.
Steer the vehicle to dismiss. LKA may
become temporarily unavailable after
repeated take steering alerts.
When the System Does Not
Seem to Work Properly
The system performance may be
affected by:
.Close vehicles ahead.
.Sudden lighting changes, such as
when driving through tunnels.
.Banked roads.
.Roads with poor lane markings,
such as two-lane roads. If the LKA system is not functioning
properly when lane markings are
clearly visible, cleaning the windshield
may help.
A camera blocked message may
display if the camera is blocked. Some
driver assistance systems may have
reduced performance or not work at
all. An LKA or LDW unavailable
message may display if the systems
are temporarily unavailable. This
message could be due to a blocked
camera. The LKA system does not
need service. Clean the outside of the
windshield behind the rearview mirror.
LKA assistance and/or LDW alerts
may occur due to tar marks, shadows,
cracks in the road, temporary or
construction lane markings, or other
road imperfections. This is normal
system operation; the vehicle does not
need service. Turn LKA off if these
conditions continue.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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282 DRIVING AND OPERATING
Hitch Cover
To remove hitch cover, if equipped:1. Remove the two fasteners on the lower tabs.
2. Pull the lower edge of the cover to about a 45 degree angle.
3. Pull the cover downward to disengage the upper attachments.
To reinstall the hitch cover: 1. Hold cover at a 45 degree angle to the vehicle and push the upper
tabs into the slots in the bumper.
2. Push the bottom of the cover forward until the lower tabs line up
with the lower slots. 3. Snap the hitch cover into place by
pushing the upper corners forward.
4. Reinstall the two fasteners on the lower tabs.
Consider using mechanical sway
controls with any trailer. Ask a
trailering professional about sway
controls or refer to the trailer
manufacturer's recommendations and
instructions.
Tires
.Do not tow a trailer while using a
compact spare tire on the vehicle.
.Tires must be properly inflated to
support loads while towing a trailer.
See Tires 0318 for instructions on
proper tire inflation.
Safety Chains
Always attach chains between the
vehicle and the trailer, and attach the
chains to the holes on the trailer hitch
platform. Instructions about safety
chains may be provided by the hitch
manufacturer or by the trailer
manufacturer. Cross the safety chains under the
tongue of the trailer to help prevent
the tongue from contacting the road if
it becomes separated from the hitch.
Always leave just enough slack so the
combination can turn. Never allow
safety chains to drag on the ground.
Trailer Brakes
Loaded trailers over 450 kg (1,000 lb)
must be equipped with brake systems
and with brakes for each axle. Trailer
braking equipment conforming to
Canadian Standards Association (CSA)
requirement CAN3-D313, or its
equivalent, is recommended.
State or local regulations may require
trailers to have their own braking
system if the loaded weight of the
trailer exceeds certain minimums that
can vary from state to state. Read and
follow the instructions for the trailer
brakes so they are installed, adjusted,
and maintained properly. Never
attempt to tap into your vehicle's
hydraulic brake system. If you do,
both the vehicle anti-lock brakes and
the trailer brakes may not function,
which could result in a crash.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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VEHICLE CARE 285
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 286
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 286
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 286
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 287
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 289
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 290
Engine Oil Life System . . . . . . . . . . . 292
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Engine Air Filter Life System . . . . 293
Engine Air Cleaner/Filter . . . . . . . . . 294
Cooling System . . . . . . . . . . . . . . . . . . . 295
Engine Overheating . . . . . . . . . . . . . . 298
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 299
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 300
Battery - North America . . . . . . . . . 301
All-Wheel Drive . . . . . . . . . . . . . . . . . . 302 Park Brake and P (Park)
Mechanism Check . . . . . . . . . . . . . . 302
Wiper Blade Replacement . . . . . . . 303
Windshield Replacement . . . . . . . . 304
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 304
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . 305
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 305
LED Lighting . . . . . . . . . . . . . . . . . . . . . 305
Front Turn Signal Lamps . . . . . . . . 305
Back-Up Lamps . . . . . . . . . . . . . . . . . . . 306
Electrical System
Electrical System Overload . . . . . . 307
Fuses and Circuit Breakers . . . . . . 308
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Instrument Panel Fuse Block . . . . 314
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
All-Season Tires . . . . . . . . . . . . . . . . . . 319
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 319
Summer Tires . . . . . . . . . . . . . . . . . . . . 319
Tire Sidewall Labeling . . . . . . . . . . . 320
Tire Designations . . . . . . . . . . . . . . . . . 322 Tire Terminology and
Definitions . . . . . . . . . . . . . . . . . . . . . . 323
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 325
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . 326
Tire Pressure Monitor System . . . 327
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 328
Tire Inspection . . . . . . . . . . . . . . . . . . . 331
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 332
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Buying New Tires . . . . . . . . . . . . . . . . 334
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 335
Uniform Tire Quality Grading . . . 335
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Wheel Replacement . . . . . . . . . . . . . . 337
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 338
If a Tire Goes Flat . . . . . . . . . . . . . . . . 338
Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 340
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 345
Tire Changing . . . . . . . . . . . . . . . . . . . . . 346
Compact Spare Tire . . . . . . . . . . . . . . 350

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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286 VEHICLE CARE
Jump Starting
Jump Starting - NorthAmerica . . . . . . . . . . . . . . . . . . . . . . . . . 351
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . . . . . 353
Recreational Vehicle Towing . . . . 355
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . 357
Interior Care . . . . . . . . . . . . . . . . . . . . . . 361
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . 365
General Information
For service and parts needs, visit your
dealer. You will receive genuine GM
parts and GM-trained and supported
service people.
Genuine GM parts have one of these
marks:
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag initiators,
seat belt pretensioners, and lithium
batteries contained in electronic keys,
may contain perchlorate materials.
Perchlorate Material –special
handling may apply. See
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and
Modifications
Adding non-dealer accessories or
making modifications to the vehicle
can affect vehicle performance and
safety, including such things as
airbags, braking, stability, ride and
handling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. These accessories or
modifications could even cause
malfunction or damage not covered by
the vehicle warranty.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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288 VEHICLE CARE
Hood
{Warning
For vehicles with auto engine stop/
start, turn the vehicle off before
opening the hood. If the vehicle is
on, the engine will start when the
hood is opened. You or others could
be injured.
{Warning
Components under the hood can
get hot from running the engine. To
help avoid the risk of burning
unprotected skin, never touch these
components until they have cooled,
and always use a glove or towel to
avoid direct skin contact.
Clear any snow from the hood before
opening. To open the hood:
1. Pull the hood release lever with the
isymbol. It is on the lower left
side of the instrument panel.
2. Go to the front of the vehicle and locate the secondary release lever
under the front center of the hood.
Push the secondary hood release
lever to the right to release.
3. After you have partially lifted the hood, the gas strut system will
automatically lift the hood and
hold it in the fully open position. To close the hood:
1. Before closing the hood, be sure all filler caps are on properly, and all
tools are removed.
2. Pull the hood down until the strut system is no longer holding up
the hood.
3. Allow the hood to fall. Check to make sure the hood is latched
completely. Repeat this process
with additional force if necessary.
{Warning
Do not drive the vehicle if the hood
is not latched completely. The hood
could open fully, block your vision,
and cause a crash. You or others
could be injured. Always close the
hood completely before driving.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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290 VEHICLE CARE
1.Engine Air Cleaner/Filter 0294.
2. Engine Oil Fill Cap. See Engine Oil
0 290.
3. Engine Oil Dipstick. See Engine Oil
0 290.
4. Engine Cooling Fan (Out of View). See Cooling System 0295.
5. Brake Fluid Reservoir. See Brake
Fluid 0300.
6. Battery - North America 0301.
7. Engine Coolant Surge Tank and Pressure Cap. See Cooling System
0 295.
8. Positive (+) Battery Terminal (Under Cover). See Jump Starting -
North America 0351.
9. Windshield Washer Fluid Reservoir. See Washer Fluid 0299.
10. Engine Compartment Fuse Block
0309.
11. Remote Negative (-) Battery Terminal. See Jump Starting - North
America 0351.Engine Oil
To ensure proper engine performance
and long life, careful attention must
be paid to engine oil. Following these
simple, but important steps will help
protect your investment:
.Use engine oil approved to the
proper specification and of the
proper viscosity grade. See
“Selecting the Right Engine Oil” in
this section.
.Check the engine oil level regularly
and maintain the proper oil level.
See “Checking Engine Oil” and
“When to Add Engine Oil” in this
section.
.Change the engine oil at the
appropriate time. See Engine Oil Life
System 0292.
.Always dispose of engine oil
properly. See “What to Do with Used
Oil” in this section.
Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially prior
to a long trip. The engine oil dipstick handle is a loop. See
Engine
Compartment Overview 0289 for the
location.
{Warning
The engine oil dipstick handle may
be hot; it could burn you. Use a
towel or glove to touch the dipstick
handle.
If a low oil Driver Information Center
(DIC) message displays, check the oil
level.
Follow these guidelines:
.To get an accurate reading, park the
vehicle on level ground. Check the
engine oil level after the engine has
been off for at least two hours.
Checking the engine oil level on
steep grades or too soon after
engine shutoff can result in
incorrect readings. Accuracy
improves when checking a cold
engine prior to starting. Remove the
dipstick and check the level.
.If unable to wait two hours, the
engine must be off for at least
15 minutes if the engine is warm,
or at least 30 minutes if the engine

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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VEHICLE CARE 297
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
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.
1. Turn the pressure cap slowly counterclockwise. If a hiss is heard,
wait for that to stop. A hiss means
there is still some pressure left.
2. Keep turning the pressure cap slowly and remove it.
3. If topping off the level in thecoolant surge tank, add the proper
mixture until the level reaches the
mark on the front of the tank and
replace the cap. Operate the
vehicle. Repeat steps 1–3, as
necessary.
If filling the system (such as after
servicing), follow the Automatic
Coolant Service Fill Instructions.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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306 VEHICLE CARE
2. Remove fasteners retaining thefront wheel liner.
3. Pull back wheel liner to expose back of turn signal lamp.
4. Remove turn signal bulb socketfrom lamp housing by rotating
counterclockwise.
5. Replace the bulb and reverse Steps 1–4 to reinstall.
Back-Up Lamps
To replace one of these bulbs:
1. Remove the fasteners to removethe trailer hitch cover.
2. Access the lamp through the opening in the underbody.
3. Disconnect the electrical connector from the bulb assembly.
4. Turn the bulb socketcounterclockwise and pull the bulb
straight out of the socket.
5. Replace the bulb and reverse Steps 1–4 to reinstall.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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VEHICLE CARE 307
Electrical System
Electrical System Overload
The vehicle has fuses and circuit
breakers to protect against an
electrical system overload.
When the current electrical load is too
heavy, the circuit breaker opens and
closes, protecting the circuit until the
current load returns to normal or the
problem is fixed. This greatly reduces
the chance of circuit overload and fire
caused by electrical problems.
Fuses and circuit breakers protect
power devices in the vehicle.
If there is a problem on the road and
a fuse needs to be replaced, the
same amperage fuse can be borrowed.
Choose some feature of the vehicle
that is not needed to use and replace
it as soon as possible.
To check a fuse, look at the band
inside the fuse. If the band is broken
or melted, replace the fuse. Be sure to
replace a bad fuse with a fuse of the
identical size and rating.
Replacing a Blown Fuse
1. Turn off the vehicle.
2. Locate the fuse puller in the enginecompartment fuse block.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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308 VEHICLE CARE
3. Use the fuse puller to remove thefuse from the top or side, as shown
above.
4. If the fuse must be replaced immediately, borrow a replacement
fuse with the same amperage from
the fuse block. Choose a vehicle
feature that is not needed to safely
operate the vehicle. Repeat
Steps 2-3.
5. Insert the replacement fuse into the empty slot of the blown fuse.
At the next opportunity, see your
dealer to replace the blown fuse.
Headlamp Wiring
An electrical overload may cause the
lamps to go on and off, or in some
cases to remain off. Have the
headlamp wiring checked right away if
the lamps go on and off or remain off.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.
Although the circuit is protected from
electrical overload, overload due to
heavy snow or ice may cause wiper
linkage damage. Always clear ice and
heavy snow from the windshield
before using the windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses and circuit
breakers. This greatly reduces the
chance of damage caused by electrical
problems.
{Danger
Fuses and circuit breakers are
marked with their ampere rating.
Do not exceed the
specified amperage rating when
replacing fuses and circuit breakers.
Use of an oversized fuse or circuit
breaker can result in a vehicle fire.
You and others could be seriously
injured or killed.