2021 CADILLAC XT4 service indicator

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
294 VEHICLE CARE
Automatic Coolant Service Fill
Instructions
This feature assists in filling and
removing air from the cooling system
after service of components or when
coolant is added after being too low.
To activate the fill and air removal
process:1. With a cold system, add coolant to the indicated mark on the
surge tank.
2. Replace the cap on the surge tank.
3. Connect the vehicle to a battery charger.
4. Turn the ignition to Service Mode. See Ignition Positions 0219.
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 0103. 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
Service 0378. 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
(Continued)

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
296 VEHICLE CARE
Caution (Continued)
.Do not mix water with
ready-to-use washer fluid. Water
can cause the solution to freeze
and damage the washer fluid
tank and other parts of the
washer system.
.When using concentrated washer
fluid, follow the manufacturer
instructions for adding water.
.Fill the washer fluid tank only
three-quarters full when it is very
cold. This allows for fluid
expansion if freezing occurs,
which could damage the tank if
it is completely full.
Brakes
Disc brake linings have built-in wear
indicators that make a high-pitched
warning sound when the brake linings
are worn and new linings are needed.
The sound can come and go or can be
heard all the time when the vehicle is
moving, except when applying the
brake pedal firmly.
{Warning
The brake wear warning sound
means that soon the brakes will not
work well. That could lead to a
crash. When the brake wear
warning sound is heard, have the
vehicle serviced.
Caution
Continuing to drive with worn-out
brake linings could result in costly
brake repairs.
Some driving conditions or climates
can cause a brake squeal when the
brakes are first applied, clearing up
following several applications. This
does not mean something is wrong
with the brakes.
Properly torqued wheel nuts are
necessary to help prevent brake
pulsation. When tires are rotated,
inspect brake linings for wear and
evenly tighten wheel nuts in the
proper sequence to torque
specifications. See Capacities and
Specifications 0371. Brake pads should be replaced as
complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does
not return to normal height, or if
there is a rapid increase in pedal
travel. This could be a sign that brake
service may be required.
Replacing Brake System Parts
Always replace brake system parts
with new, approved replacement parts.
If this is not done, the brakes may not
work properly. The braking
performance can change in many
ways if the wrong brake parts are
installed or if parts are improperly
installed.
Brake Fluid

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
322 VEHICLE CARE
in the following order: driver side
front tire, passenger side front tire,
passenger side rear tire, and driver
side rear. See your dealer for service or
to purchase a relearn tool. A TPMS
relearn tool can also be purchased.
See Tire Pressure Monitor Sensor
Activation Tool at
www.gmtoolsandequipment.com or
call 1-800-GM TOOLS
(1-800-468-6657).
There are two minutes to match the
first tire/wheel position, and
five minutes overall to match all four
tire/wheel positions. If it takes longer,
the matching process stops and must
be restarted.
The TPMS sensor matching process is:1. Set the parking brake.
2. Place the vehicle in Service Mode. See Ignition Positions 0219.
3. Make sure the Tire Pressure info display option is turned on. The
info displays on the DIC can be
turned on and off through the
Options menu. See Driver
Information Center (DIC) 0114. 4. Use the five-way DIC control on the
right side of the steering wheel to
scroll to the Tire Pressure screen
under the DIC info page. See Driver
Information Center (DIC) 0114.
5. Press and hold SEL in the center of the five-way DIC control.
The horn sounds twice to signal
the receiver is in relearn mode and
the TIRE LEARNING ACTIVE
message displays on the DIC
screen.
6. Start with the driver side front tire.
7. Place the relearn tool against the tire sidewall, near the valve stem.
Then press the button to activate
the TPMS sensor. A horn chirp
confirms that the sensor
identification code has been
matched to this tire and wheel
position.
8. Proceed to the passenger side front tire, and repeat Step 7.
9. Proceed to the passenger side rear tire, and repeat Step 7.
10. Proceed to the driver side rear tire, and repeat Step 7. The horn sounds
two times to indicate the sensor identification code has been
matched to the driver side rear tire,
and the TPMS sensor matching
process is no longer active. The
TIRE LEARNING ACTIVE message
on the DIC display screen goes off.
11. Turn the vehicle off.
12. Set all four tires to the recommended air pressure level as
indicated on the Tire and Loading
Information label.
Tire Inspection
We recommend that the tires,
including the spare tire, if the
vehicle has one, be inspected for
signs of wear or damage at least
once a month.
Replace the tire if:
.The indicators at three or more
places around the tire can
be seen.
.There is cord or fabric showing
through the tire's rubber.
.The tread or sidewall is cracked,
cut, or snagged deep enough to
show cord or fabric.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
366 SERVICE AND MAINTENANCE
Tires
Tires need to be properly inflated,
rotated, and balanced. Maintaining
the tires can save money and fuel, and
can reduce the risk of tire failure.
.Signs that the tires need to be
replaced include three or more
visible treadwear indicators; cord or
fabric showing through the rubber;
cracks or cuts in the tread or
sidewall; or a bulge or split in
the tire.
.Trained dealer technicians can
inspect and recommend the right
tires. Your dealer can also provide
tire/wheel balancing services to
ensure smooth vehicle operation at
all speeds. Your dealer sells and
services name brand tires.Vehicle Care
To help keep the vehicle looking like
new, vehicle care products are
available from your dealer. For
information on how to clean and
protect the vehicle’s interior and
exterior, see
Interior Care 0352 and
Exterior Care 0348.
Wheel Alignment
Wheel alignment is critical for
ensuring that the tires deliver optimal
wear and performance..Signs that the alignment may need
to be adjusted include pulling,
improper vehicle handling,
or unusual tire wear.
.Your dealer has the required
equipment to ensure proper wheel
alignment. Windshield
For safety, appearance, and the best
viewing, keep the windshield clean
and clear.
.Signs of damage include scratches,
cracks, and chips.
.Trained dealer technicians can
inspect the windshield and
recommend proper replacement if
needed.
Wiper Blades
Wiper blades need to be cleaned and
kept in good condition to provide a
clear view.
.Signs of wear include streaking,
skipping across the windshield, and
worn or split rubber.
.Trained dealer technicians can
check the wiper blades and replace
them when needed.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
INDEX 399
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
FluidAutomatic Transmission . . . . . . . . . 289
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 28
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383
Front Pedestrian Braking (FPB)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Front Seats Heated and Ventilated . . . . . . . . . . . . 43
Front Storage . . . . . . . . . . . . . . . . . . . . . . . . 84
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Economy, Driving for Better . . . . . 205
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 270
Filling the Tank . . . . . . . . . . . . . . . . . . . 268
Foreign Countries . . . . . . . . . . . . . . . . . 268
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Low Fuel Warning Light . . . . . . . . . 112
Management, Active . . . . . . . . . . . . . . 225
Prohibited Fuels . . . . . . . . . . . . . . . . . . 268
Recommended . . . . . . . . . . . . . . . . . . . . 267
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 267 Fuses
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Fuses and Circuit Breakers . . . . . . . 303
Instrument Panel Fuse Block . . . . 306
G
Garage Door Opener . . . . . . . . . . . . . . . . 125 Programming . . . . . . . . . . . . . . . . . . . . . . 125
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 300
Gauges Engine Coolant Temperature . . . . 103
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Speedometer . . . . . . . . . . . . . . . . . . . . . . 101
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 102
Trip Odometer . . . . . . . . . . . . . . . . . . . . 101
Warning Lights and Indicators . . . 99
Gear Shifting Light . . . . . . . . . . . . . . . . . 108
General Information Service and Maintenance . . . . . . . . 357
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 282
Global Positioning System (GPS) . . . . . . . . . . . . . . . . . . . . . . 163
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377 Guidance
Problems with the Route . . . . . . . . . 163
H
Hazard Warning Flashers . . . . . . . . . . 132
HD Radio Technology . . . . . . . . . . . . . . 144
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 37
Head-up Display . . . . . . . . . . . . . . . . . . . . 116
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 131
Bulb Replacement . . . . . . . . . . . . . . . . 301
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 131
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 131
High-Beam On Light . . . . . . . . . . . . . . 113
High/Low Beam Changer . . . . . . . . . 131
Lamps On Reminder . . . . . . . . . . . . . . 113
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Steering Wheel . . . . . . . . . . . . . . . . . . . . . 91
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 29
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
High-Beam On Light . . . . . . . . . . . . . . . . 113

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
400 INDEX
High-Speed Operation . . . . . . . . . . . . . . 317
Hill and Mountain Roads . . . . . . . . . . 213
Hill Start Assist (HSA) . . . . . . . . . . . . . 234
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
How to Wear Seat Belts Properly . . . 48
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
I
If the System Needs Service . . . . . . . 164
Ignition Positions . . . . . . . . . . . . . . . . . . . 219
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 27
IndicatorPedestrian Ahead . . . . . . . . . . . . . . . . . 110
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 109
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Information Publication Ordering . . . . . . . . . . . . . 383
Infotainment System . . . . . . . . . . . . . . . 386
Instrument Cluster . . . . . . . . . . . . . . . . . . 99
Instrument Panel Overview . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . 30
Introduction . . . . . . . . . . . . . . . . . . . . . . 1, 136
J
Jump Starting - North America . . . . 342
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . 7
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 310
Lamps Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Daytime Running (DRL) . . . . . . . . . . 131
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Exterior Controls . . . . . . . . . . . . . . . . . . 129
Exterior Lamps Off Reminder . . . . 131
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 105
On Reminder . . . . . . . . . . . . . . . . . . . . . . 113
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Lane Change Alert (LCA) . . . . . . . . . . . 263
Lane Keep Assist (LKA) . . . . . . . . . . . . 265
Lane Keep Assist Light . . . . . . . . . . . . . 109
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 50
LATCH System Replacing Parts after a Crash . . . . . 79
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . 72 LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 301
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Light
Performance Shifting . . . . . . . . . . . . . 109
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Illumination Control . . . . . . . . . . . . . . 133
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Lights Airbag Readiness . . . . . . . . . . . . . . . . . 104
All-Wheel Drive . . . . . . . . . . . . . . . . . . . 109
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . 108
Brake System Warning . . . . . . . . . . . 107
Charging System . . . . . . . . . . . . . . . . . . 105
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 105
Cruise Control . . . . . . . . . . . . . . . . . . . . . 113
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Driver Mode Control . . . . . . . . . . . . . . 111
Electric Parking Brake . . . . . . . . . . . . 107
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 111
Engine Oil Pressure . . . . . . . . . . . . . . . 112
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 131
Gear Shifting . . . . . . . . . . . . . . . . . . . . . . 108
High-Beam On . . . . . . . . . . . . . . . . . . . . 113

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
INDEX 401
Lights (cont'd)High/Low Beam Changer . . . . . . . . . 131
Lane Keep Assist . . . . . . . . . . . . . . . . . . 109
Low Fuel Warning . . . . . . . . . . . . . . . . 112
Seat Belt Reminders . . . . . . . . . . . . . . 103
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Service Electric Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 110
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 111
Traction Control System (TCS)/StabiliTrak . . . . . . . . . . . . . . . . 110
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 110
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . 18
Delayed Locking . . . . . . . . . . . . . . . . . . . 18
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Lockout Protection . . . . . . . . . . . . . . . . 18
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . 18
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 208
Low Fuel Warning Light . . . . . . . . . . . 112
Lower Anchors and Tethers for
Children (LATCH System) . . . . . . . . . 72
Lumbar Adjustment . . . . . . . . . . . . . . . . . 39 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . 39M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . 364
Maintenance Schedule . . . . . . . . . . . . . 358 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . 367
Malfunction Indicator Lamp . . . . . . . 105
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . 231
Map Data Updates . . . . . . . . . . . . . . . . . . 164
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Media Avoiding Untrusted Devices . . . . . 147
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . 41
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . 120
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . 120
Mirror Rear Camera . . . . . . . . . . . . . . . . . . . . . . . 30
Mirrors Automatic Dimming . . . . . . . . . . . . . . . 29
Automatic Dimming Rearview . . . . 30
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Mirrors (cont'd)
Manual Rearview . . . . . . . . . . . . . . . . . . 30
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . 29
Mirrors, Interior Rearview . . . . . . . . . . . 30
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236 Driver Control . . . . . . . . . . . . . . . . . . . . . 236
Monitor System, Tire Pressure . . . . . 318
Multi-band Antenna . . . . . . . . . . . . . . . . 146
N
Navigation Connected Services . . . . . . . . . . . . . . . 392
Destination . . . . . . . . . . . . . . . . . . . . . . . . 156
Using the System . . . . . . . . . . . . . . . . . 151
Navigation Symbols . . . . . . . . . . . . . . . . 155
New Vehicle Break-In . . . . . . . . . . . . . . . 219
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Engine Oil Life System . . . . . . . . . . . 288
Pressure Light . . . . . . . . . . . . . . . . . . . . . 112
Older Children, Restraints . . . . . . . . . . . 65