2023 CADILLAC XT6 maintenance

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85004164 A
XT6
OWNER’S MANUAL
Roadside Assistance 1-800-882-1112
2023
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Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . .1
Keys, Doors, and Windows . . . . .8
Seats and Restraints . . . . . . . . . .46
Storage . . . . . . . . . . . . . . . . . . . . . . . . . .108
Instruments and Controls . . . .116
Lighting . . . . . . . . . . . . . . . . . . . . . . . . . .156
Infotainment System . . . . . . . . . .164
Climate Controls . . . . . . . . . . . . . . .228
Driving and Operating . . . . . . . .238
Vehicle Care . . . . . . . . . . . . . . . . . . . .362
Service and Maintenance . . .452
Technical Data . . . . . . . . . . . . . . . . .462
Customer Information . . . . . . .466
Reporting Safety Defects . . .478
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . .482
Connected Services . . . . . . . . . .489
Index . . . . . . . . . . . . . . . . . . . . . . . . 492
Introduction
California Proposition 65 Warning
Litho in U.S.A.
Part No. 85004164 A First Printing©2022 General Motors LLC. All Rights Reserved.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
84 Seats and Restraints
If the vehicle has rollover
roof-rail airbags, see Different
Size Tires and Wheels0421
for additional important
information.
If the vehicle must be modified
because you have a disability
and have questions about
whether the modifications will
affect the vehicle's airbag
system, or if you have
questions about whether the
airbag system will be affected
if the vehicle is modified for
any other reason, call
Customer Assistance. See
Customer Assistance Offices
0 468.
Airbag System Check
The airbag system does not
need regularly scheduled
maintenance or replacement.
Make sure the airbag
readiness light is working. See
Airbag Readiness Light 0132.
Caution
If an airbag covering is
damaged, opened, or broken,
the airbag may not work
properly. Do not open or
break the airbag coverings.
If there are any opened or
broken airbag coverings,
have the airbag covering
and/or airbag module
replaced. For the location of
the airbags, see Where Are
the Airbags? 073. See your
dealer for service.
Replacing Airbag
System Parts after a
Crash
{Warning
A crash can damage the
airbag systems in the
vehicle. A damaged airbag
system may not properly
protect you and your
passenger(s) in a crash,
(Continued)
Warning (Continued)
resulting in serious injury or
even death. To help make
sure the airbag systems are
working properly after a
crash, have them inspected
and any necessary
replacements made as soon
as possible.
If an airbag inflates, you will
need to replace airbag system
parts. See your dealer for
service.
If the airbag readiness light
stays on after the vehicle is
started or comes on when you
are driving, the airbag system
may not work properly. Have
the vehicle serviced right
away. See Airbag Readiness
Light 0132.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Instruments and Controls 135
Caution
Modifications to the engine,
transmission, exhaust,
intake, or fuel system, or the
use of replacement tires
that do not meet the original
tire specifications, can cause
this light to come on. This
could lead to costly repairs
not covered by the vehicle
warranty. This could also
affect the vehicle’s ability to
pass an Emissions
Inspection/Maintenance
test. See Accessories and
Modifications0363.
If the light is flashing : A
malfunction has been
detected that could damage
the emission control system
and increase vehicle
emissions. Diagnosis and
service may be required.
To help prevent damage,
reduce vehicle speed and
avoid hard accelerations and
uphill grades. If towing a trailer, reduce the amount of
cargo being hauled as soon as
possible.
If the light continues to flash,
find a safe place to park. Turn
the vehicle off and wait at
least 10 seconds before
restarting the engine. If the
light is still flashing, follow the
previous guidelines and see
your dealer for service as
soon as possible.
If the light is on steady :
A
malfunction has been
detected. Diagnosis and
service may be required.
Check the following:
.If fuel has been added to the
vehicle using the capless fuel
funnel adapter, make sure
that it has been removed.
See “Filling the Tank with a
Portable Gas Can” under
Filling the Tank 0344. The
diagnostic system can
detect if the adapter has
been left installed in the
vehicle, allowing fuel to
evaporate into the atmosphere. A few driving
trips with the adapter
removed may turn off the
light.
.Poor fuel quality can cause
inefficient engine operation
and poor driveability, which
may go away once the
engine is warmed up. If this
occurs, change the fuel
brand. It may require at least
one full tank of the proper
fuel to turn the light off. See
Recommended Fuel (2.0L L4
Turbo Engine)
0343 or
Recommended Fuel (3.6L
V6 Engine) 0343.
If the light remains on, see
your dealer.
Emissions Inspection and
Maintenance Programs
If the vehicle requires an
Emissions Inspection/
Maintenance test, the test
equipment will likely connect
to the vehicle's Data Link
Connector (DLC).

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
136 Instruments and Controls
The DLC is under the
instrument panel to the left of
the steering wheel.
Connecting devices that are
not used to perform an
Emissions Inspection/
Maintenance test or to service
the vehicle may affect vehicle
operation. See Add-On
Electrical Equipment0360.
See your dealer if assistance
is needed.
The vehicle may not pass
inspection if:
.The light is on when the
engine is running.
.The light does not come on
when the ignition is in
Service Mode.
.Critical emission control
systems have not been
completely diagnosed. If this happens, the vehicle would
not be ready for inspection
and might require
several days of routine
driving before the system is
ready for inspection. This
can happen if the 12-volt
battery has recently been
replaced or run down, or if
the vehicle has been
recently serviced.
See your dealer if the vehicle
will not pass or cannot be
made ready for the test.
Brake System
Warning Light
MetricEnglish
This light comes on briefly
when the vehicle is turned on
to show that the light is
working. If it does not come on then, have it fixed so it will be
ready to warn you if there is a
problem.
If the light comes on and stays
on, there is a brake problem.
Have the brake system
inspected right away. This
light may come on if the brake
fluid is low. See Brake Fluid
0
384.
If the light comes on while
driving, pull off the road and
stop carefully. If equipped with
electric brake boost, vehicle
speed may be limited when the
brake system warning light
comes on. The brake pedal
might be harder to push,
or the brake pedal may go
closer to the floor. It could
take longer to stop. If the light
is still on, have the vehicle
towed for service. See
Transporting a Disabled
Vehicle 0437.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
146 Instruments and Controls
When the remaining oil life is
low, the CHANGE ENGINE OIL
SOON message will appear on
the display. The oil should be
changed as soon as possible.
See Engine Oil0370. In
addition to the engine oil life
system monitoring the oil life,
additional maintenance is
recommended. See
Maintenance Schedule 0454.
The Oil Life display must be
reset after each oil change.
It will not reset itself. Do not
reset the Oil Life display
accidentally at any time other
than when the oil has just
been changed. It cannot be
reset accurately until the next
oil change. To reset, see
Engine Oil Life System 0373.
Tire Pressure : Shows the
approximate pressures of all
four tires. Tire pressure is
displayed in either
kilopascal (kPa) or in pounds
per square inch (psi). If the
pressure is low, the value for
that tire is shown in amber. See Tire Pressure Monitor
System
0411 and
Tire Pressure Monitor
Operation 0412.
Air Filter Life : Shows an
estimate of the engine air
filter’s remaining useful life
and the state of the system.
Engine Air Filter Life 95%
means 95% of the current air
filter life remains. Messages
will display based on the
engine air filter life and the
state of the system. When the
REPLACE AT NEXT OIL
CHANGE message displays,
the engine air filter should be
replaced at the time of the
next oil change. When the
REPLACE NOW message
displays, the engine air filter
should be replaced as soon as
possible.
The Air Filter Life display must
be reset after the engine air
filter replacement. To reset,
see Engine Air Filter Life
System 0374. Fuel Economy :
Displays
average fuel economy, the
best fuel economy over the
selected distance, and a bar
graph showing instantaneous
fuel economy.
If the vehicle is equipped with
an Active Fuel Management
indicator, the engine operating
mode may be shown in the
corner of this display.
Average Speed : Displays the
average vehicle speed of the
vehicle in kilometers per
hour (km/h) or miles per
hour (mph). This average is
based on the various vehicle
speeds recorded since the last
reset. Reset the average
speed by pressing the
thumbwheel while this display
is active to show a
confirmation window to select
yes or no.
Timer : This display can be
used as a timer. To start the
timer, press the thumbwheel
while this display is active. The
display will show the amount

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
228 Climate Controls
Climate Controls
Climate Control Systems
Dual Automatic ClimateControl System . . . . . . . . . . . 228
Rear Climate Control System . . . . . . . . . . . . . . . . . . . . . . 234
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 236
Maintenance
Passenger CompartmentAir Filter . . . . . . . . . . . . . . . . . . . . 237
Service . . . . . . . . . . . . . . . . . . . . . . . . 237
Climate Control Systems
Dual Automatic Climate Control System
The climate control buttons on the center stack and on the
climate control display are used to adjust the heating, cooling,
and ventilation.
Center Stack Climate Controls
1. Driver and Passenger Temperature Controls
2. Fan Control
3. Driver and Passenger Heated and Ventilated
Seats (If Equipped)
4. Rear Window Defogger 5. Defrost
6. OFF (Fan)
7. Recirculation
8. AUTO (Automatic
Operation)

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Climate Controls 237
.Clear snow off the hood to
improve visibility and help
decrease moisture drawn
into the vehicle.
.Use of non-GM approved
hood deflectors can
adversely affect the
performance of the system.
.Keep the path under all
seats clear of objects to help
circulate the air inside the
vehicle more effectively.
.If fogging reoccurs while in
vent or bi-level modes with
mild temperature
throughout the vehicle, turn
on the air conditioner to
reduce windshield fogging.
Maintenance
Passenger
Compartment Air
Filter
The filter reduces dust, pollen,
and other airborne irritants
from outside air that is pulled
into the vehicle. The filtershould be replaced as part of
routine scheduled
maintenance. See
Maintenance Schedule
0454.
See your dealer regarding
replacement of the filter.
Service
All vehicles have a label
underhood that identifies the
refrigerant used in the vehicle.
The refrigerant system should
only be serviced by trained
and certified technicians. The
air conditioning evaporator
should never be repaired or
replaced by one from a
salvage vehicle. It should only
be replaced by a new
evaporator to ensure proper
and safe operation.
During service, all refrigerants
should be reclaimed with
proper equipment. Venting
refrigerants directly to the
atmosphere is harmful to the
environment and may also
create unsafe conditions based on inhalation,
combustion, frostbite, or other
health-based concerns.
The air conditioning system
requires periodic maintenance.
See Maintenance Schedule
0
454.