ECU CADILLAC XT6 2023 Service Manual

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
152 Instruments and Controls
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.
Universal Remote
System
See Radio Frequency
Statement0477.
Universal Remote
System Programming
If equipped, these buttons are
in the overhead console.
This system can replace up to
three remote control
transmitters used to activate
devices such as garage door
openers, security systems,
and home automation devices. These instructions refer to a
garage door opener, but can
be used for other devices.
Do not use the Universal
Remote system with any
garage door opener that does
not have the stop and reverse
feature. This includes any
garage door opener model
manufactured before April
1, 1982.
Read these instructions
completely before
programming the Universal
Remote system. It may help to
have another person assist
with the programming
process.
Keep the original hand-held
transmitter for use in other
vehicles as well as for future
programming. Erase the
programming when vehicle
ownership is terminated. See
“Erasing Universal Remote
System Buttons”
later in this
section.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
210 Infotainment System
apply. For Android Auto
support and to see if your
phone is compatible, see
https://support.google.com/
androidauto. For Apple
CarPlay support and to see if
your phone is compatible, see
www.apple.com/ios/carplay/.
Apple or Google may change
or suspend availability at any
time. Android Auto, Android,
Google, Google Play, and other
marks are trademarks of
Google Inc.; Apple CarPlay is a
trademark of Apple Inc.
Press
{on the center stack to
exit Android Auto or Apple
CarPlay. To enter back into
Android Auto or Apple
CarPlay, press and hold
{on
the center stack.
Apple CarPlay and Android
Auto can be disabled from the
infotainment system. To do
this, touch Home, Settings,
and then touch the Apps tab
along the top of the display. Use the On/Off toggled to
turn off Apple CarPlay or
Android Auto.
Settings
Certain settings can be
managed in the Online
Account sites when an
account is established, and
may be modified if other users
have accessed the vehicle or
created accounts. This may
result in changes to the
security or functionality of the
infotainment system. Some
settings may also be
transferred to a new vehicle,
if equipped. For instructions,
visit your brand website.
Refer to the User Terms and
Privacy Statement for
important details. To view,
touch the Settings icon on the
Home Page of the
infotainment display.
The settings menu may be
organized into four categories.
Select the desired category by
touching System, Apps,
Vehicle, or Personal.
To access the personalization
menus:
1. Touch Settings on the Home Page on the
infotainment display.
2. Touch the desired category to display a list of
available options.
3. Touch to select the desired feature setting.
4. Touch the options on the infotainment display to
disable or enable a feature.
5. Touch
zto go to the top
level of the Settings menu.
System
The menu may contain the
following:
Time / Date
Allows setting of the clock.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
212 Infotainment System
Downloading Over-the-Air
vehicle software updates
requires Internet connectivity,
which can be accessed
through the vehicle’s built-in
4G LTE connection,
if equipped and active.
If required, data plans are
provided by a third party.
Optionally, a secure Wi-Fi
hotspot such as a compatible
mobile device hotspot, home
hotspot, or public hotspot can
be used. Applicable data rates
may apply.
To connect the infotainment
system to a secured mobile
device hotspot, home hotspot,
or public hotspot, touch
Settings on the Home Page,
select the System tab,
followed by Wi-Fi Networks.
Select the appropriate Wi-Fi
network, and follow the
on-screen prompts. Download
speeds may vary.
On most compatible mobile
devices, activation of the Wi-Fi
hotspot is in the Settingsmenu under Mobile Network
Sharing, Personal Hotspot,
Mobile Hotspot, or similar.
Availability of Over-the-Air
software updates varies by
vehicle and country. Features
are subject to change. For
more information on this
feature, see Online Account
0
469 for details.
Preferences
Allows the infotainment
system to disable or enable
the download of new updates
in the background.
About
Shows the infotainment
system software information.
Running Applications
Shows a complete list of
applications that are currently
running on the infotainment
system. Return to Factory Settings
Allows resetting the
infotainment system settings
in the vehicle.
Apps
The menu may contain the
following:
Android Auto
Allows interacting directly with
a mobile device on the
infotainment display. See
Apple CarPlay and Android
Auto
0208.
Apple CarPlay
This feature allows you to
interact directly with your
mobile device on the
infotainment display. See
Apple CarPlay and Android
Auto 0208.
Apps
Shows app settings and
information.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
214 Infotainment System
Personal
If equipped, this menu allows
adjustment of different user
profile settings. See“Users”in
Using the System 0168 for
information on setting up user
profiles.
The menu may contain the
following:
Name
Touch to edit your user name
that will be displayed in the
vehicle.
Vehicle Account Information
Touch to view the vehicle
account information and to
change the account password.
An “unverified user account”
pop-up will display until the
account information
verification process has been
completed on the Internet.
Check your registered e-mail
account for an activation
e-mail to complete the
verification process. Profile Picture
Touch to choose or change
your profile picture.
Profile Identifiers
Touch to have the vehicle
recognize the identifier you
choose.
Touch Vehicle Key 1 and/or
Vehicle Key 2.
If the remote key is lost or
stolen, see your dealer.
Security
Touch to have your profile
secured with a PIN.
Touch No or Yes.
Vehicle Name
Touch to edit your
vehicle name.
Vehicle Account
Touch to view the vehicle
account information and to
change the account password.
Delete Profile
Touch to remove the profile
from the vehicle.
Touch Remove or Cancel.
Teen Driver
If equipped, this allows
multiple keys to be registered
for beginner drivers to
encourage safe driving habits.
When the vehicle is started
with a Teen Driver key, it will
automatically activate certain
safety systems, allow setting
of some features, and limit the
use of others. The Report
Card will record vehicle data
about driving behavior that
can be viewed later. When the
vehicle is started with a
registered key, the Driver
Information Center (DIC)
displays a message that Teen
Driver is active.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Infotainment System 217
systems, touch Set Teen
Driver Speed Warning to set
the warning speed.
Set Teen Driver Speed
Warning :Choose the desired
speed warning level. The
speed warning does not limit
the speed of the vehicle.
SiriusXM Explicit Content
Filter : Allows the SiriusXM
Explicit Content Filter to be
turned ON or OFF. When ON,
the teen driver will not be able
to listen to SiriusXM stations
that contain explicit content,
and the Explicit Content Filter
selection in the Audio Settings
will be unavailable for change.
When Teen Driver is Active:
.If equipped, the radio will
mute when the driver seat
belt, and in some vehicles
the front passenger seat
belt, is not buckled. The
audio from any device paired
to the vehicle will also be
muted.
.An object placed on the
front passenger seat, such
as a briefcase, handbag,
grocery bag, laptop, or other
electronic device, could
cause the passenger
sensing system to falsely
sense an unbuckled front
passenger and mute the
radio. If this happens,
remove the object from the
seat. See Passenger
Sensing System 078.
.Some safety systems, such
as Automatic Emergency
Braking, if equipped, cannot
be turned off.
.The gap setting for Adaptive
Cruise Control and alert
timing for Forward Collision
Alert, if equipped, cannot be
changed.
.When trying to change a
safety feature that is not
configurable in Teen Driver,
the feature may be grayed
out or removed from the
infotainment menu, or the
DIC will display a message indicating that Teen Driver is
active and the action is not
available.
.Super Cruise, if equipped, is
not available.
.Enhanced Low Fuel Warning
(if equipped)
–When the
vehicle is low on fuel, the low
fuel light on the instrument
cluster flashes and the DIC
low fuel warning cannot be
dismissed.
.Do not tow a trailer if
equipped with Automatic
Emergency Braking.
Report Card
The vehicle owner must
secure the driver’s consent to
record certain vehicle data
when the vehicle is driven with
a registered Teen Driver key.
There is one Report Card per
vehicle. Data is only recorded
when a registered Teen Driver
key is used to operate the
vehicle.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
244 Driving and Operating
reducing vehicle speed by
shifting to a lower gear. Any
sudden changes could cause
the tires to slide.
Remember: Antilock brakes
help avoid only the
braking skid.
Off-Road Driving
All-Wheel Drive vehicles can
be used for off-road driving.
Vehicles without All-Wheel
Drive and vehicles not
equipped with All Terrain (AT)
or On-Off Road (OOR) tires
must not be driven off-road
except on a level, solid
surface. To contact the tire
manufacturer for more
information about the original
equipment tires, see the
Limited Warranty and Owner
Assistance Information
manual.
Controlling the vehicle is the
key to successful off-road
driving. One of the best ways
to control the vehicle is to
control the speed.
{Warning
When driving off-road,
bouncing and quick changes
in direction can easily throw
you out of position. This
could cause you to lose
control and crash. You and
your passengers should
always wear seat belts.
Before Driving Off-Road
.Have all necessary
maintenance and service
work completed.
.Fuel the vehicle, fill fluid
levels, and check inflation
pressure in all tires, including
the spare, if equipped.
.Read all the information
about All-Wheel Drive
vehicles in this manual.
.Make sure all underbody
shields, if equipped, are
properly attached.
.Know the local laws that
apply to off-road driving. To gain more ground
clearance if needed, it may be
necessary to remove the front
fascia lower air dam. However,
driving without the air dam
reduces fuel economy.
Caution
Operating the vehicle for
extended periods without
the front fascia lower air
dam installed can cause
improper airflow to the
engine. Reattach the front
fascia air dam after off-road
driving.
Loading the Vehicle for
Off-Road Driving
{Warning
.Unsecured cargo on the
load floor can be tossed
about when driving over
rough terrain. You or your
passengers can be struck
by flying objects. Secure
the cargo properly.
(Continued)

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
256 Driving and Operating
Warning (Continued)
.Do not leave an
unsecured child
restraint in the vehicle.
.Secure loose items in
the vehicle.
.Do not leave a seat
folded down unless
needed.
Starting and
Operating
New Vehicle Break-In
Caution
The vehicle does not need
an elaborate break-in. But it
will perform better in the
long run if you follow these
guidelines:
.Do not drive at any one
constant speed, fast or
slow, for the first 800 km
(500 mi). Do not make(Continued)
Caution (Continued)
full-throttle starts. Avoid
downshifting to brake or
slow the vehicle.
.Avoid making hard stops
for the first 300 km
(200 mi) or so. During this
time the new brake linings
are not yet broken in. Hard
stops with new linings can
mean premature wear and
earlier replacement.
Follow this breaking-in
guideline every time you
get new brake linings.
.Do not tow a trailer during
break-in. See Trailer
Towing0351 for the
trailer towing capabilities
of the vehicle and more
information.
Following break-in, engine
speed and load can be
gradually increased. On new vehicles, the various
mechanical and electrical
systems experience a
“break-in”
period during the
first 6 400 km (4,000 mi) of
routine driving. As the vehicle
is driven, the mechanical
systems adjust to provide
optimal fuel economy and
transmission shift
performance.
Electrical systems will adapt
and calibrate during the
break-in period. A one-time
occurrence of clicks and
similar vehicle noises is normal
during this process.
Normal driving charges the
vehicle’s battery to achieve
the best operation of the
vehicle, including fuel economy
and the Stop/Start System.
See Stop/Start System 0259.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Driving and Operating 349
as the vehicle itself. Get used
to the handling and braking of
the combination by driving on
a level road surface before
driving on public roads.
The trailer structure, the tires,
and the brakes must be all be
rated to carry the intended
cargo. Inadequate trailer
equipment can cause the
combination to operate in an
unexpected or unsafe manner.
Before driving, inspect all
trailer hitch parts and
attachments, safety chains,
electrical connectors, lamps,
tires, and mirrors. See Towing
Equipment0356. If the trailer
has electric brakes, start the
combination moving and then
manually apply the trailer
brake controller to check the
trailer brakes work. During the
trip, occasionally check that
the cargo and trailer are
secure and that the lamps and
any trailer brakes are working.Towing with a Stability
Control System
When towing, the stability
control system might be
heard. The system reacts to
vehicle movement caused by
the trailer, which mainly occurs
during cornering. This is
normal when towing heavier
trailers.
Following Distance
Stay at least twice as far
behind the vehicle ahead as
you would when driving
without a trailer. This can help
to avoid heavy braking and
sudden turns.
Passing
More passing distance is
needed when towing a trailer.
The combination of the vehicle
and trailer will not accelerate
as quickly and is much longer
than the vehicle alone. It is
necessary to go much farther
beyond the passed vehicle before returning to the lane.
Pass on level roadways. Avoid
passing on hills if possible.
Backing Up
Hold the bottom of the
steering wheel with one hand.
To move the trailer to the left,
move that hand to the left. To
move the trailer to the right,
move that hand to the right.
Always back up slowly and,
if possible, have someone
guide you.
Making Turns
Caution
Turn more slowly and make
wider arcs when towing a
trailer to prevent damage to
your vehicle. Making very
sharp turns could cause the
trailer to contact the vehicle.
Make wider turns than normal
when towing, so the trailer will
not go over soft shoulders,
over curbs, or strike road
signs, trees, or other objects.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
380 Vehicle Care
coolant surge tank until
the level reaches the mark
pointed to on the front of
the coolant surge tank.
5. Replace the pressure cap tightly.
6. Verify coolant level after the engine is shut off and
the coolant is cold.
If necessary, repeat
coolant fill procedure
Step 1–6.
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.
Automatic Coolant
Service Fill Instructions
(2.0L Engine Only)
If equipped, 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,
disconnect the vent line
from the port near the cap
on the surge tank. Add
coolant to the indicated
mark on the surge tank.
2. Reconnect the vent line to the surge tank and replace
the cap on the surge tank.
3. Connect the vehicle to a battery charger.
4. Put the vehicle in Service Mode. See Ignition
Positions 0257. 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 Engine Control Module
(ECM) to go to sleep, about
two minutes, and repeat
steps 3-7.
Listen for pump activation and
movement of the control
valves while watching the level
of the 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.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
388 Vehicle Care
6. Push the new wiperblade (1) assembly securely
on the wiper arm (3) until
the release lever (2) clicks
into place.
7. Start the engine and the rear wiper will return to its
normal position.
Windshield
Replacement
HUD System
The windshield is part of the
HUD system. If the windshield
needs to be replaced, a GM
windshield designed for HUD
is recommended. The
replacement windshield must
be installed according to GM specifications. If it is not, the
HUD image may look out of
focus.
Driver Assistance
Systems
If the windshield needs to be
replaced and the vehicle is
equipped with a front camera
sensor for the Driver
Assistance Systems, a GM
replacement windshield is
recommended. The
replacement windshield must
be installed according to GM
specifications for proper
alignment. If it is not, these
systems may not work
properly, they may display
messages, or they may not
work at all. See your dealer for
proper windshield
replacement.
Acoustic Windshield
The vehicle is equipped with
an acoustic windshield. If the
windshield needs to be
replaced be sure to get an
acoustic windshield so you willcontinue to have the benefits
an acoustic windshield can
provide.
Gas Strut(s)
Your vehicle may be equipped
with gas strut(s) to provide
assistance in lifting and
holding open the hood/trunk/
liftgate system in full open
position.
{Warning
If the gas struts that hold
open the hood, trunk, and/or
liftgate fail, you or others
could be seriously injured.
Take the vehicle to your
dealer for service
immediately. Visually inspect
the gas struts for signs of
wear, cracks, or other
damage periodically. Check
to make sure the hood/
trunk/liftgate is held open
with enough force. If struts
are failing to hold the hood/
(Continued)