2021 CADILLAC XT4 battery replacement

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
KEYS, DOORS, AND WINDOWS 7
The key inside the Remote Keyless
Entry (RKE) transmitter can be used
for all locks.
To remove the key, press the button
near the bottom of the transmitter,
and pull the key out. Never pull the
key out without pressing the button.
If it becomes difficult to turn the key,
inspect the key blade for debris.
See your dealer if a new key is needed.
Contact Roadside Service if locked out
of the vehicle. SeeRoadside Service
0 378.
With an active OnStar or connected
service plan, an OnStar Advisor may
remotely unlock the vehicle. See
OnStar Overview 0387.
Remote Keyless Entry
(RKE) System
See Radio Frequency Statement 0383.
If there is a decrease in the Remote
Keyless Entry (RKE) operating range:
.Check the distance. The transmitter
may be too far from the vehicle.
.Check the location. Other vehicles
or objects may be blocking the
signal.
.Check the transmitter's battery. See
“Battery Replacement ”later in this
section.
.If the transmitter is still not
working correctly, see your dealer or
a qualified technician for service.
Remote Keyless Entry
(RKE) System Operation
The Keyless Access system allows for
vehicle entry when the transmitter is
within 1 m (3 ft). See “Keyless Access
Operation ”following.
The RKE transmitter functions may
work up to 60 m (197 ft) away from
the vehicle.
Other conditions can impact the
performance of the transmitter. See
Remote Keyless Entry (RKE) System
0 7.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
10 KEYS, DOORS, AND WINDOWS
Passive Locking
With Keyless Access this vehicle will
lock several seconds after all doors are
closed if the vehicle is off and at least
one RKE transmitter has been
removed or none remain in the
interior.
If other electronic devices interfere
with the RKE transmitter signal, the
vehicle may not detect the RKE
transmitter inside the vehicle.
If passive locking is enabled, the doors
may lock with the RKE transmitter
inside the vehicle. Do not leave the
RKE transmitter in an unattended
vehicle.
To customize the doors to
automatically lock when exiting the
vehicle, seeVehicle Personalization
0 120.
Temporary Disable of Passive
Locking
Temporarily disable passive locking by
pressing and holding
Kon the
interior door switch with a door open
for at least four seconds, or until three
chimes are heard. Passive locking will then remain disabled until
Qon the
interior door is pressed, or until the
vehicle is turned on.
Remote Left in Vehicle Alert
When the vehicle is turned off and an
RKE transmitter is left in the vehicle,
the horn will chirp three times after
all doors are closed. To turn on or off,
see Vehicle Personalization 0120.
Remote No Longer in Vehicle Alert
If the vehicle is on, with a door open,
and then all doors are closed, the
vehicle will check for RKE
transmitter(s) inside. If an RKE
transmitter is not detected, the Driver
Information Center (DIC) will display
NO REMOTE DETECTED and the horn
will chirp three times.
This occurs only once each time the
vehicle is driven.
To turn on or off, see Vehicle
Personalization 0120.
Keyless Liftgate Opening
Press the touch pad on the liftgate
handle to open the liftgate if the RKE
transmitter is within 1 m (3 ft). Key Access
To access a vehicle with a weak
transmitter battery, see
Door Locks
0 15.
Programming Transmitters to
the Vehicle
Only RKE transmitters programmed to
the vehicle will work. If a transmitter
is lost or stolen, a replacement can be
purchased and programmed through
your dealer.
The vehicle can be reprogrammed so
that lost or stolen transmitters no
longer work. Each vehicle can have up
to eight transmitters matched to it.
Programming with Recognized
Transmitters
A new transmitter can be programmed
to the vehicle when there are two
recognized transmitters.
To program, the vehicle must be off
and all of the transmitters, both
currently recognized and new, must
be with you.
1. Remove the key from the RKE transmitter.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
KEYS, DOORS, AND WINDOWS 13
Battery Replacement
{Warning
Never allow children to play with
the RKE transmitter. The
transmitter contains a small
battery, which can be a choking
hazard. If swallowed, internal burns
can occur, resulting in severe injury
or death. Seek medical attention
immediately if a battery is
swallowed.
{Warning
To avoid personal injury, do not
touch metal surfaces on the RKE
transmitter when it has been
exposed to extreme heat. These
surfaces can be hot to the touch at
temperatures above 59 °C (138 °F).
Caution
When replacing the battery, do not
touch any of the circuitry on the
transmitter. Static from your body
could damage the transmitter.
Caution
Always replace the battery with the
correct type. Replacing the battery
with an incorrect type could
potentially create a risk of battery
explosion. Dispose of used batteries
according to instructions and local
laws. Do not attempt to burn,
crush, or cut the used battery, and
avoid exposing the battery to
environments with extremely low
air pressures or high temperatures.
Replace the battery if the DIC displays
REPLACE BATTERY IN REMOTE KEY.
1. Press the button on the side of the RKE transmitter near the bottom
and pull the key out. Never pull the
key out without pressing the
button.
2. Separate the two halves of thetransmitter using a flat tool
inserted into the bottom center of
the transmitter. Do not use the
key slot.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
64 SEATS AND RESTRAINTS
Servicing the
Airbag-Equipped Vehicle
Airbags affect how the vehicle should
be serviced. There are parts of the
airbag system in several places around
the vehicle. Your dealer and the
service manual have information
about servicing the vehicle and the
airbag system. To purchase a service
manual, seePublication Ordering
Information 0383.
{Warning
For up to 10 seconds after the
vehicle is turned off and the battery
is disconnected, an airbag can still
inflate during improper service. You
can be injured if you are close to an
airbag when it inflates. Avoid
yellow connectors. They are
probably part of the airbag system.
Be sure to follow proper service
procedures, and make sure the
person performing work for you is
qualified to do so.
Adding Equipment to the
Airbag-Equipped Vehicle
Adding accessories that change the
vehicle's frame, bumper system,
height, front end, or side sheet metal
may keep the airbag system from
working properly.
The operation of the airbag system
can also be affected by changing,
including improperly repairing or
replacing, any parts of the following:
.Airbag system, including airbag
modules, front or side impact
sensors, sensing and diagnostic
module, or airbag wiring
.Front seats, including stitching,
seams or zippers
.Seat belts
.Steering wheel, instrument panel,
overhead console, ceiling trim,
or pillar garnish trim
.Inner door seals, including speakers
Your dealer and the service manual
have information about the location of
the airbag modules and sensors, sensing and diagnostic module, and
airbag wiring along with the proper
replacement procedures.
In addition, the vehicle has a
passenger sensing system for the front
outboard passenger position, which
includes sensors that are part of the
passenger seat. The passenger sensing
system may not operate properly if
the original seat trim is replaced with
non-GM covers, upholstery, or trim; or
with GM covers, upholstery, or trim
designed for a different vehicle. Any
object, such as an aftermarket seat
heater or a comfort-enhancing pad or
device, installed under or on top of
the seat fabric, could also interfere
with the operation of the passenger
sensing system. This could either
prevent proper deployment of the
passenger airbag(s) or prevent the
passenger sensing system from
properly turning off the passenger
airbag(s). See
Passenger Sensing
System 060.
If the vehicle has rollover roof-rail
airbags, see Different Size Tires and
Wheels 0326 for additional important
information.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
120 INSTRUMENTS AND CONTROLS
the thumbwheel. The messages that
require immediate action cannot be
cleared until that action is performed.
All messages should be taken
seriously; clearing the message does
not correct the problem.
If a SERVICE message appears, see
your dealer.
Follow the instructions given in the
messages. The system displays
messages regarding the following
topics:
.Service Messages
.Fluid Levels
.Vehicle Security
.Brakes
.Steering
.Ride Control Systems
.Driver Assistance Systems
.Cruise Control
.Lighting and Bulb Replacement
.Wiper/Washer Systems
.Doors and Windows
.Seat Belts
.Airbag Systems
.Engine and Transmission
.Tire Pressure
.Battery
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays when the
vehicle's propulsion power is reduced.
A reduction in propulsion power can
affect the vehicle's ability to
accelerate. If this message is on, but
there is no observed reduction in
performance, proceed to your
destination. Under certain conditions
the performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven while this
message is on, but maximum
acceleration and speed may be
reduced. Anytime this message stays
on, or displays repeatedly, the vehicle
should be taken to your dealer for
service as soon as possible.
Under certain operating conditions,
propulsion will be disabled. Try
restarting after the ignition has been
off for 30 seconds.
Vehicle Speed Messages
SPEED LIMITED TO XXX
KM/H (MPH)
This message shows that the vehicle
speed has been limited to the speed
displayed. The limited speed is a
protection for various propulsion and
vehicle systems, such as lubrication,
thermal, brakes, suspension, Teen
Driver if equipped, or tires.
Vehicle Personalization
The following are all possible vehicle
personalization features. Depending
on the vehicle, some may not be
available.
For System, Apps, and Personal
features and functions, seeSettings
0 177.
To access the vehicle
personalization menu: 1. Touch the Settings icon on the Home Page of the infotainment
display.
2. Touch Vehicle to display a list of available options.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
VEHICLE CARE 281
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 282
California Proposition65 Warning . . . . . . . . . . . . . . . . . . . . . 282
California Perchlorate Materials Requirements . . . . . . . . . . . . . . . . . . . 282
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 283
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 283
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 285
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 286
Engine Oil Life System . . . . . . . . . . . 288
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Engine Air Filter Life System . . . . 289
Engine Air Cleaner/Filter . . . . . . . . . 290
Cooling System . . . . . . . . . . . . . . . . . . . 291
Engine Overheating . . . . . . . . . . . . . . 294
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 295
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 296
Battery - North America . . . . . . . . . 297
All-Wheel Drive . . . . . . . . . . . . . . . . . . 298 Park Brake and P (Park)
Mechanism Check . . . . . . . . . . . . . . 298
Wiper Blade Replacement . . . . . . . 299
Windshield Replacement . . . . . . . . 300
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 300
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . 301
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 301
LED Lighting . . . . . . . . . . . . . . . . . . . . . 301
Back-Up Lamps . . . . . . . . . . . . . . . . . . . 302
Electrical System
Electrical System Overload . . . . . . 302
Fuses and Circuit Breakers . . . . . . 303
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Instrument Panel Fuse Block . . . . 306
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
All-Season Tires . . . . . . . . . . . . . . . . . . 309
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 310
Summer Tires . . . . . . . . . . . . . . . . . . . . 310
Tire Sidewall Labeling . . . . . . . . . . . 310
Tire Designations . . . . . . . . . . . . . . . . . 312
Tire Terminology and Definitions . . . . . . . . . . . . . . . . . . . . . . 313
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 316 Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . . . . . . . 317
Tire Pressure Monitor System . . . 318
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 319
Tire Inspection . . . . . . . . . . . . . . . . . . . 322
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 323
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Buying New Tires . . . . . . . . . . . . . . . . 325
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Uniform Tire Quality Grading . . . 326
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 328
Wheel Replacement . . . . . . . . . . . . . . 328
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 328
If a Tire Goes Flat . . . . . . . . . . . . . . . . 329
Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 331
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 336
Tire Changing . . . . . . . . . . . . . . . . . . . . . 337
Compact Spare Tire . . . . . . . . . . . . . . 341
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . . . 342

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
VEHICLE CARE 297
The brake master cylinder reservoir is
filled with GM approved DOT 4 brake
fluid as indicated on the reservoir cap.
SeeEngine Compartment Overview
0 285 for the location of the reservoir.
Checking Brake Fluid
With the vehicle in P (Park) on a level
surface, the brake fluid level should be
between the minimum and maximum
marks on the brake fluid reservoir.
There are only two reasons why the
brake fluid level in the reservoir may
go down:
.Normal brake lining wear. When
new linings are installed, the fluid
level goes back up.
.A fluid leak in the brake hydraulic
system. Have the brake hydraulic
system fixed. With a leak, the
brakes will not work well.
Always clean the brake fluid reservoir
cap and the area around the cap
before removing it.
Do not top off the brake fluid. Adding
fluid does not correct a leak. If fluid is
added when the linings are worn,
there will be too much fluid when
new brake linings are installed. Add or remove fluid, as necessary, only when
work is done on the brake hydraulic
system.
{Warning
If too much brake fluid is added, it
can spill on the engine and burn,
if the engine is hot enough. You or
others could be burned, and the
vehicle could be damaged. Add
brake fluid only when work is done
on the brake hydraulic system.
When the brake fluid falls to a low
level, the brake warning light comes
on. See Brake System Warning Light
0 107.
Brake fluid absorbs water over time
which degrades the effectiveness of
the brake fluid. Replace brake fluid at
the specified intervals to prevent
increased stopping distance. See
Maintenance Schedule 0358.
What to Add
Use only GM approved DOT 4 brake
fluid from a clean, sealed container.
See Recommended Fluids and
Lubricants 0367.
{Warning
The wrong or contaminated brake
fluid could result in damage to the
brake system. This could result in
the loss of braking leading to a
possible injury. Always use the
proper GM approved brake fluid.
Caution
If brake fluid is spilled on the
vehicle's painted surfaces, the paint
finish can be damaged. Immediately
wash off any painted surface.
Battery - North America
The original equipment battery is
maintenance free. Do not remove the
cap and do not add fluid.
Refer to the replacement number
shown on the original battery label
when a new battery is needed. See
Engine Compartment Overview 0285
for battery location.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
364 SERVICE AND MAINTENANCE
Footnotes—Maintenance Schedule
Additional Required Services -
Severe
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0323.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter.
(3) Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition.
(4) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced. (5)
Or every five years, whichever
comes first. See Cooling System0291.
(6) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(7) Replace brake fluid every five
years. See Brake Fluid 0296.
(8) Or every 12 months, whichever
comes first. See Wiper Blade
Replacement 0299.
(9) Or every 10 years, whichever
comes first. See Gas Strut(s)0300.
(10) Replace air conditioning
desiccant every seven years.
Special Application
Services
.Severe Commercial Use Vehicles
Only: Lubricate chassis components
every oil change.
.Have underbody flushing service
performed. See "Underbody
Maintenance" in Exterior Care0348.
Additional Maintenance
and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional maintenance
services may be required.
It is recommended that your dealer
perform these services —their trained
dealer technicians know your vehicle
best. Your dealer can also perform a
thorough assessment with a
multi-point inspection to recommend
when your vehicle may need
attention.
The following list is intended to
explain the services and conditions to
look for that may indicate services are
required.
Battery
The 12-volt battery supplies power to
start the engine and operate any
additional electrical accessories.
.To avoid break-down or failure to
start the vehicle, maintain a battery
with full cranking power.