2023 CADILLAC XT4 brake light

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 345
Brake Fluid
The brake master cylinder
reservoir is filled with GM
approved DOT 4 brake fluid as
indicated on the reservoir cap.
See Engine Compartment
Overview0331 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 (Continued)
Warning (Continued)
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 0128.
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
0 425.
What to Add
Use only GM approved DOT 4
brake fluid from a clean, sealed
container. See Recommended
Fluids and Lubricants 0429.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
364 Vehicle Care
Fuses UsageF41 BCM 1 SS –Body
Control Module 1
(Stop/Start) –LED
Indicator Lighting
Control, Accessory
LED Control,
Run-Start LED
Control, Ambient
Lighting LED
Control 2, Liftgate
Latch Motor Control
Signal, Rear Wiper
Control Signal, High
Beam Lamp Control
(Direct Drive), Rear
Fog LED Lamp
Control Signal,
Windshield Washer
Pump Motor Control
Signal, Run/Crank
Relay Control Signal,
ECM/TCM ACC
Wakeup Control
Signal, Left Rear Turn
Control Signal, Rear
Wiper Wash Pump
Control Signal, Brake
Pedal Apply Signal Fuses Usage
F42 RDO –Radio
F43 APO CNSL –Console
Auxiliary Power
Outlet (Circuit
Breaker)
–
F44 Spare –
Relay Usage K1 –
K2 RAP/ACCY
–
Retained
Accessory Power
K3 Content Theft
–
Not Used
K4 –
K5 –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
Limits0242.
(Continued)

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
378 Vehicle Care
and DIC message should go
off after the road tire is
replaced and the sensor
matching process is
performed successfully. See
“TPMS Sensor Matching
Process”later in this section.
.The TPMS sensor matching
process was not done or not
completed successfully after
rotating the tires. The
malfunction light and the DIC
message should go off after
successfully completing the
sensor matching process.
See "TPMS Sensor Matching
Process" later in this section.
.One or more TPMS sensors
are missing or damaged. The
malfunction light and the DIC
message should go off when
the TPMS sensors are
installed and the sensor
matching process is
performed successfully. See
your dealer for service.
.Replacement tires or wheels
do not match the original
equipment tires or wheels.
Tires and wheels other than those recommended could
prevent the TPMS from
functioning properly. See
Buying New Tires
0383.
.Operating electronic devices
or being near facilities using
radio wave frequencies
similar to the TPMS could
cause the TPMS sensors to
malfunction.
If the TPMS is not functioning
properly it cannot detect or
signal a low tire pressure
condition. See your dealer for
service if the TPMS
malfunction light and DIC
message come on and stay on.
Tire Fill Alert (If Equipped)
This feature provides visual
and audible alerts outside the
vehicle to help when inflating
an underinflated tire to the
recommended cold tire
pressure.
When the low tire pressure
warning light comes on: 1. Park the vehicle in a safe, level place. 2. Set the parking brake
firmly.
3. Place the vehicle in P (Park).
4. Add air to the tire that is underinflated. The turn
signal lamp will flash.
When the recommended
pressure is reached, the
horn sounds once and the
turn signal lamp will stop
flashing and briefly turn
solid.
Repeat these steps for all
underinflated tires that have
illuminated the low tire
pressure warning light.{Warning
Overinflating a tire could
cause the tire to rupture
and you or others could be
injured. Do not exceed the
maximum pressure listed on
the tire sidewall. See Tire
Sidewall Labeling 0367 and
Vehicle Load Limits 0242.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 383
The rubber in tires ages over
time. This also applies to the
spare tire, if the vehicle has
one, even if it is never used.
Multiple factors including
temperatures, loading
conditions, and inflation
pressure maintenance affect
how fast aging takes place.
GM recommends that tires,
including the spare if
equipped, be replaced after six
years, regardless of tread
wear. To identify the age of a
tire, use the tire manufacture
date, which is the last four
digits of the DOT Tire
Identification Number (TIN)
molded into one side of the
tire sidewall. The last four
digits of the TIN indicate the
tire manufactured date. The
first two digits represent the
week and the last two digits,
the year. For example, the
third week of the year 2020
would have a 4-digit DOT date
of 0320. Week 01 is the first
full week (Sunday through
Saturday) of each year.Vehicle Storage
Tires age when stored
normally mounted on a parked
vehicle. Park a vehicle that will
be stored for at least a month
in a cool, dry, clean area away
from direct sunlight to slow
aging. This area should be free
of grease, gasoline, or other
substances that can
deteriorate rubber.
Parking for an extended
period can cause flat spots on
the tires that may result in
vibrations while driving. When
storing a vehicle for at least a
month, remove the tires or
raise the vehicle to reduce the
weight from the tires.
Buying New Tires
GM has developed and
matched specific tires for
the vehicle. The original
equipment tires installed
were designed to meet
General Motors Tire
Performance CriteriaSpecification (TPC Spec)
system rating. When
replacement tires are
needed, GM strongly
recommends buying tires
with the same TPC Spec
rating.
GM's exclusive TPC Spec
system considers over a
dozen critical specifications
that impact the overall
performance of the vehicle,
including brake system
performance, ride and
handling, traction control,
and tire pressure
monitoring performance.
GM's TPC Spec number is
molded onto the tire's
sidewall near the tire size.
If the tires have an
all-season tread design, the
TPC Spec number will be
followed by MS for mud
and snow. See Tire
Sidewall Labeling
0367 for
additional information.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 385
range, speed rating, and
construction (radial) as the
original tires.
The Tire and Loading
Information label indicates
the original equipment tires
on the vehicle. See Vehicle
Load Limits0242.
Different Size Tires
and Wheels
If wheels or tires are installed
that are a different size than
the original equipment wheels
and tires, vehicle performance,
including its braking, ride and
handling characteristics,
stability, and resistance to
rollover may be affected. If the
vehicle has electronic systems
such as antilock brakes,
rollover airbags, traction
control, electronic stability
control, or All-Wheel Drive, the
performance of these systems
can also be affected.
{Warning
If different sized wheels are
used, there may not be an
acceptable level of
performance and safety if
tires not recommended for
those wheels are selected.
This increases the chance of
a crash and serious injury.
Only use GM specific wheel
and tire systems developed
for the vehicle, and have
them properly installed by a
GM certified technician.
See Buying New Tires 0383
and Accessories and
Modifications 0327.
Uniform Tire Quality
Grading
The following information
relates to the system
developed by the United
States National Highway
Traffic Safety
Administration (NHTSA), which grades tires by
treadwear, traction, and
temperature performance.
This applies only to
vehicles sold in the United
States. The grades are
molded on the sidewalls of
most passenger car tires.
The Uniform Tire Quality
Grading (UTQG) system
does not apply to deep
tread, winter tires, compact
spare tires, tires with
nominal rim diameters of
10 to 12 inches
(25 to 30 cm), or to some
limited-production tires.
While the tires available on
General Motors passenger
cars and light trucks may
vary with respect to these
grades, they must also
conform to federal safety
requirements and
additional General Motors
Tire Performance Criteria
(TPC) standards.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
406 Vehicle Care
4. Discharged BatteryNegative (−) Terminal
The discharged battery
positive (+) terminal and the
discharged battery negative
(–) terminal are on the driver
side of the vehicle.
The good battery negative (–)
terminal and good battery
positive (+) terminal are on the
battery of the vehicle
providing the jump start.
The discharged battery
positive (+) terminal is under a
cover. Remove the cover to
expose the terminal.
1. Check the other vehicle. It must have a 12-volt
battery with a negative
ground system.
Caution
If the other vehicle does not
have a 12-volt system with a
negative ground, both
vehicles can be damaged.
Only use a vehicle that has a
(Continued)
Caution (Continued)
12-volt system with a
negative ground for jump
starting.
2. Position the two vehicles so that they are not
touching.
3. Set the parking brake firmly and put the
transmission in P (Park).
See Shifting Into Park
0254.
Caution
If any accessories are left on
or plugged in during the
jump starting procedure,
they could be damaged. The
repairs would not be
covered by the vehicle
warranty. Whenever
possible, turn off or unplug
all accessories on either
vehicle when jump starting. 4. Turn the ignition off. Turn
off all lights and
accessories in both
vehicles, except the hazard
warning flashers if needed.
{Warning
An electric fan can start up
even when the engine is not
running and can injure you.
Keep hands, clothing, and
tools away from any
underhood electric fan.
{Warning
Using a match near a
battery can cause battery
gas to explode. People have
been hurt doing this, and
some have been blinded.
Use a flashlight if you need
more light.
Battery fluid contains acid
that can burn you. Do not
get it on you. If you
accidentally get it in your
(Continued)

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
428 Service and Maintenance
Exterior Lights
.Visual inspection
Windshield and Wipers
.Visual inspection
Battery
.Battery visual inspection
.Battery test results
.Battery cables and
connections
Systems, Fluids, and
Visible Leak Inspection
.Engine oil
.Transmission
.Drive axle
.Transfer case
.Engine cooling system
.Power steering, if equipped
.Fuel system
.Windshield washer fluid
Tire Inspection
.Tire pressure, tread depth,
and wear
.Rotation, if applicable
.Alignment check, optional
.Reset tire pressure monitor
.Check tire sealant expiration
date, if equipped
.Check spare tire, if equipped
Brakes
.Check brake system
Visible and Functional
Inspections
.Seat belt components
.Exhaust system
.Accelerator pedal
.Passenger compartment air
filter, if equipped
.Engine air filter
.Hoses
.Belts
.Shocks and struts
.Steering components
.Axle boots or driveshaft and
u-joints
.Compartment lift struts,
if equipped
.Floor mats secured, no
interference with pedals
.Horn
.Ignition lock, if equipped
.Starter switch
.Evaporative control system
Lubricate
.Chassis components
Special Application
Services
.Severe Commercial Use
Vehicles Only: Lubricate
chassis components every
oil change.
.Have underbody flushing
service performed. See
"Underbody Maintenance" in
Exterior Care 0412.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
462 INDEX
AlertLane Change . . . . . . . . . . . . . . . 304
Rear Cross Traffic . . . . . . . . . 297
Rear Pedestrian . . . . . . . . . . . 296
Side Blind
Zone (SBZA) . . . . . . . . . . . . . . . 304
All-Season Tires . . . . . . . . . . . . . 365
All-Wheel Drive . . . . . . . . .263, 347
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
AM-FM Radio . . . . . . . . . . . . . . . . . . 163
Antenna Multi-band . . . . . . . . . . . . . . . . . . . . 168
Antilock Brake System (ABS) . . . . . . . . . . . . . . . 264
Warning Light . . . . . . . . . . . . . . . 129
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . . 412
Interior . . . . . . . . . . . . . . . . . . . . . . . . . 417
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . 201
Assistance Program,
Roadside . . . . . . . . . . . . . . . . . . . . . 439
Assistance Systems Driving . . . . . . . . . . . . . . . . . . . . . . . . . 297
Parking and Backing . . . . . . 286
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . 172 Automatic
Dimming Mirrors . . . . . . . . . . . . . 36
Door Locks . . . . . . . . . . . . . . . . . . . . 23
Emergency
Braking (AEB) . . . . . . . . . . . . . 300
Headlamp System . . . . . . . . . . 151
Parking Assist (APA) . . . . . . 291
Transmission . . . . . . . . . . . . . . . . 257
Transmission Fluid . . . . . . . . 336
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . 262
Avoiding Untrusted Media Devices . . . . . . . . . . . . . . . 169
B
BatteryExterior Lighting
Battery Saver . . . . . . . . . . . . . . 155
Power Protection . . . . . . . . . . 155
Battery - North America . . . . . . . . . . . . . . . . 346, 404
Blade Replacement, Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . 347
Bluetooth Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Overview . . . . . . . . . . . . . . . . 195, 196
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . 345 Brake (cont'd)
System Warning Light . . . . 128
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 344 Antilock . . . . . . . . . . . . . . . . . . . . . . . 264
Brake Assist . . . . . . . . . . . . . . . . 266
Electric Brake Boost . . . . . 264
Electric Parking Brake . . . 264
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . 231 AutomaticEmergency (AEB) . . . . . . . . 300
Reverse Automatic . . . . . . . 294
Braking System
FrontPedestrian (FPB) . . . . . . . . . 302
Break-In, New Vehicle . . . . . . 246
Bulb Replacement . . . . . . . . . . . 350 Back-up Lamps . . . . . . . . . . . . . 351
Front Turn SignalLamps . . . . . . . . . . . . . . . . . . . . . . . 350
Headlamp Aiming . . . . . . . . . . 350
Buying New Tires . . . . . . . . . . . . 383
C
Calibration
Compass . . . . . . . . . . . . . . . . . . . . . . 114