2021 CADILLAC CT4 light

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 89
.Info App. This is where the selected
Driver Information Center (DIC)
displays can be viewed. SeeDriver
Information Center (DIC) (Base Level)
0 107 or
Driver Information Center (DIC)
(Uplevel) 0110.
.Audio
.Navigation
.Phone
.Options
Audio
In the Audio menu browse for music,
select from the favorites, or change
the audio source. Use the thumbwheel
to change the station or go to the next
or previous track.
Navigation
If there is an active route, press the
thumbwheel to cancel or resume route
guidance, or turn the voice prompts
on or off. Phone
In the Phone menu, if there is no
active phone call, view recent calls,
or scroll through contacts. If there is
an active call, mute the phone or
switch to handset operation.
Options
Use the thumbwheel to scroll through
items in the Options menu.
Head-up Display (HUD) :
If equipped,
this feature allows for adjusting the
angle of the HUD image and changing
or turning off the Speed Limit Sign.
HUD Rotation (Uplevel): Press the
thumbwheel while Adjust Rotation is
highlighted to enter Adjust Mode.
Scroll to adjust the angle of the HUD
display. Press the thumbwheel to
confirm and save the setting. This
feature may only be available in
P (Park).
Speed Sign: If equipped, press the
thumbwheel while Speed Sign is
highlighted to turn it on or off.
Units : Choose US or metric units by
pressing the thumbwheel while the
desired item is highlighted. Info Page Options :
Press the
thumbwheel to select the items to be
displayed in the Info app. See Driver
Information Center (DIC) (Base Level)
0 107 or
Driver Information Center (DIC)
(Uplevel) 0110.
Display : Press the thumbwheel to
enter the Display menu. Select to turn
on or off the speedometer, time, fuel
range, or, if equipped, compass or
speed sign.
Speed Warning : The Speed Warning
display allows the driver to set a
warning at a speed that they do not
want to exceed. To set the Speed
Warning press the thumbwheel when
Speed Warning is displayed. Use the
thumbwheel to adjust the value and
press to set the speed.
Once the speed is set, this feature can
be turned off by pressing the
thumbwheel while viewing this page.
If the selected speed limit is exceeded,
a pop-up warning is displayed with a
chime.
Software Information : Displays open
source software information.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
92 INSTRUMENTS AND CONTROLS
Display Themes
Press the thumbwheel to enter the
Display menu. There are three
instrument cluster display
configurations to choose from. Sport,
Tour, and Track (if equipped). The
style of the cluster will change
depending on the theme selected.
Default is linked to Driver Mode.
Other display themes can be set
If in My Mode then those displays
plus HUD (if equipped) can be set.
.Sport: Displays Coolant
Temperature, Fuel Gauge, Fuel
Range, Compass, Drive Mode
Indicator, Odometer, Speed,
Tachometer, Electronic
Transmission Range, Current Gear,
Speed Limit, Info Area, and
Interaction Area, and Cruise Control
(if engaged).
.Tour: Displays Fuel Gauge, Fuel
Range, Compass, Drive Mode
Indicator, Odometer, Speed,
Tachometer, Electronic
Transmission Range, Current Gear,
Peak Performance, Speed Limit, Info
Area, and Interaction Area, and
Cruise Control (if engaged).
.Track: Displays Coolant
Temperature, Fuel Gauge, Drive
Mode Indicator, Speed, Tachometer,
Electronic Transmission Range,
Current Gear, Info Area, and
Interactive Area.
Preset info tiles shown on each layout:
Sport : Time and Temperature, Oil
Temperature, Tire Status, Oil Pressure
Track : Oil Pressure, Transmission
Fluid Temperature, Tire Pressure and
Tire Temperature, Oil Temperature
Tour : Time and Temperature
Speed Warning
The Speed Warning display allows the
driver to set a speed that they do not
want to exceed. To set the Speed
Warning, press the thumbwheel when
Speed Warning is displayed, or press
the thumbwheel on the main view to
set the speed value. Scroll to adjust
the value. Press the thumbwheel to set
the speed. Once the speed is set, this
feature can be turned off by pressing
the thumbwheel while viewing this
page. If the selected speed limit is
exceeded, a pop-up warning is
displayed with a chime. Speed Sign
Shows sign information, which comes
from a roadway database in the
onboard navigation, if equipped.
Units
Press the thumbwheel while Units is
displayed to enter the Units menu.
Choose US or metric units by pressing
the thumbwheel while the desired
item is highlighted. A selected mark
will be displayed next to the
selected item.
Tachometer
If equipped, the Tachometer allows
the driver to choose between the
traditional tachometer (linear gage) or
the numerical tachometer (shift lights
with numerical Tachometer RPM)
when Track theme is selected.
Tire Pressure
If the tire pressure readings need to be
recalibrated at any time, this option
initiates the Tire Pressure Relearn
function. The selection of relearn
opens a pop-up when the thumbwheel
is pressed for five seconds.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 93
Head-Up Display (HUD) Rotation
Press the thumbwheel while Adjust
Rotation is highlighted to enter Adjust
Mode. Scroll to adjust the angle of the
HUD display. Press the thumbwheel to
confirm and save the setting.
Remote Relearn
If equipped, this feature allows for the
vehicle to relearn remote keys.
See "Programming with Recognized
Remote Keys" underRemote Keyless
Entry (RKE) System Operation 07.
Fuel Range
Fuel Range displays the approximate
distance the vehicle can be driven
without refueling. LOW will be
displayed when the vehicle is low on
fuel. The fuel range estimate is based
on an average of the vehicle's fuel
economy over recent driving history
and the amount of fuel remaining in
the fuel tank.
Software Info
Press the thumbwheel while Software
Info is highlighted to display open
source software information. Reset To Defaults
Allows the driver to reset to default
settings.
Simplify
Press the thumbwheel to enter the
Simplify menu. Simplify Mode allows
certain features of the instrument
cluster to be hidden. These features
include info tiles and interactive areas.
Using the thumbwheel, except to
acknowledge an alert, will exit
Simplify Mode.
The selected features will stay hidden
even after starting and restarting the
vehicle, unless Simplify Mode is
manually canceled.
Speedometer
The speedometer shows the vehicle's
speed in either kilometers per hour
(km/h) or miles per hour (mph).
Odometer
The odometer shows how far the
vehicle has been driven, in either
kilometers or miles.
Trip Odometer
The trip odometer shows how far the
vehicle has been driven since the trip
odometer was last reset.
The trip odometer is accessed and
reset through the Driver Information
Center (DIC). See
Driver Information
Center (DIC) (Base Level) 0107 or
Driver Information Center (DIC)
(Uplevel) 0110.
Tachometer
The tachometer displays the engine
speed in revolutions per minute (rpm).
For vehicles with the Stop/Start
system, when the ignition is on, the
tachometer indicates the vehicle
status. When pointing to AUTO STOP
(Base Level) or the cluster displays
AUTO STOP text (Uplevel), the engine
is off but the vehicle is on and can
move. The engine could auto start at
any time. When the indicator points
to OFF, the vehicle is off.
When the engine is on, the
tachometer will indicate the engine’s
revolutions per minute (rpm). The
tachometer may vary by several

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
94 INSTRUMENTS AND CONTROLS
hundred rpm, during Auto Stop mode,
when the engine is shutting off and
restarting.
Fuel Gauge
Base Level
Uplevel
When the ignition is on, the fuel
gauge indicates about how much fuel
is left in the tank. There is an arrow near the fuel gauge
pointing to the side of the vehicle the
fuel door is on.
When the indicator nears empty, the
low fuel light comes on. There still is
a little fuel left, but the vehicle should
be refueled soon.
Here are three things that some
owners ask about. None of these show
a problem with the fuel gauge:
.It takes a little more, or less fuel to
fill up than the gauge indicated. For
example, the gauge may have
indicated the tank was half full, but
it actually took a little more, or less
than half the tank's capacity to fill
the tank.
.The gauge moves a little while
turning a corner, speeding up or
braking.
.The gauge takes a few seconds to
stabilize after the ignition is turned
on and goes back to empty when
the ignition is turned off.
Engine Coolant
Temperature Gauge (Base
Level)
English

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 95
Metric
This gauge measures the temperature
of the vehicle's engine.
While driving under normal operating
conditions, if the red LED is
illuminated, the engine is too hot. Pull
off the road, stop the vehicle, and turn
off the engine as soon as possible.
Engine Coolant
Temperature Gauge
(Uplevel)
This gauge shows the engine coolant
temperature.
If the gauge pointer moves into the
red zone, the engine is too hot.
This reading indicates the same thing
as the warning light. It means that the
engine coolant has overheated. If the
vehicle has been operating under
normal driving conditions, pull off the
road, stop the vehicle, and turn off the
engine as soon as possible. See Engine
Overheating 0322 for more
information.
Seat Belt Reminders
Driver Seat Belt Reminder Light
There is a driver seat belt reminder
light on the instrument cluster.
When the vehicle is started, this light
flashes and a chime may come on to
remind the driver to fasten their
seat belt.
Then the light stays on solid until the
belt is buckled. This cycle may
continue several times if the driver
remains or becomes unbuckled while
the vehicle is moving.
If the driver seat belt is buckled,
neither the light nor the chime
comes on.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
96 INSTRUMENTS AND CONTROLS
Front Passenger Seat Belt
Reminder Light
The vehicle may have a front
passenger seat belt reminder light
near the passenger airbag status
indicator. SeePassenger Sensing
System 053.
When the vehicle is started, this light
flashes and a chime may come on to
remind passengers to fasten their
seat belt.
Then the light stays on solid until the
belt is buckled. This cycle continues
several times if the front passenger
remains or becomes unbuckled while
the vehicle is moving.
If the front passenger seat belt is
buckled, neither the chime nor the
light comes on. The front passenger seat belt reminder
light and chime may come on if an
object is put on the seat such as a
briefcase, handbag, grocery bag,
laptop, or other electronic device. To
turn off the reminder light and/or
chime, remove the object from the
seat or buckle the seat belt.
Airbag Readiness Light
This light shows if there is an
electrical problem with the airbag
system. The system check includes
the airbag sensor(s), the passenger
sensing system, the pretensioners, the
airbag modules, the wiring, and the
crash sensing and diagnostic module.
For more information on the airbag
system, see
Airbag System 048.
The airbag readiness light comes on
for several seconds when the vehicle is
started. If the light does not come on
then, have it fixed immediately.
{Warning
If the airbag readiness light stays
on after the vehicle is started or
comes on while driving, it means
the airbag system might not be
working properly. The airbags in the
vehicle might not inflate in a crash,
or they could even inflate without a
crash. To help avoid injury, have
the vehicle serviced right away.
If there is a problem with the airbag
system, a Driver Information Center
(DIC) message may also come on.
Passenger Airbag Status
Indicator
The vehicle has a passenger sensing
system. See Passenger Sensing System
0 53 for important safety information.
The overhead console has a passenger
airbag status indicator.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 97
When the vehicle is started, the
passenger airbag status indicator will
light ON and OFF, and the symbols for
on and off, for several seconds as a
system check. Then, after several more
seconds, the status indicator will light
either ON or OFF, and either the
symbol for on or off, to let you know
the status of the front outboard
passenger frontal airbag and knee
airbag.
If the word ON, and the on symbol, is
lit on the passenger airbag status
indicator, it means that the front
outboard passenger frontal airbag and
knee airbag are allowed to inflate.
If the word OFF, and the off symbol, is
lit on the passenger airbag status
indicator, it means that the passenger
sensing system has turned off the
front outboard passenger frontal
airbag and knee airbag.If, after several seconds, all of the
symbols remain lit, or if no symbols
are lit, or if the airbag readiness light
is on, there may be a problem with
the lights or the passenger sensing
system. See your dealer for service
right away.
{Warning
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong with
the airbag system. To help avoid
injury to yourself or others, have
the vehicle serviced right away. See
Airbag Readiness Light
096 for more
information, including important
safety information.
Charging System Light
The charging system light comes on
briefly when the ignition is turned on,
but the engine is not running, as a
check to show the light is working.
It should go out when the engine is
started.
If the light stays on, or comes on
while driving, there may be a problem
with the electrical charging system.
Have it checked by your dealer.
Driving while this light is on could
drain the battery.
When this light comes on, or is
flashing, the Driver Information
Center (DIC) also displays a message.
If a short distance must be driven
with the light on, be sure to turn off
all accessories, such as the radio and
air conditioner. Find a safe place to
stop the vehicle.
Malfunction Indicator Lamp
(Check Engine Light)
This light is part of the vehicle’s
emission control on-board diagnostic
system. If this light is on while the
engine is running, a malfunction has
been detected and the vehicle may

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
98 INSTRUMENTS AND CONTROLS
require service. The light should come
on to show that it is working when
the ignition is in Service Mode. See
Ignition Positions0219.
Malfunctions are often indicated by
the system before any problem is
noticeable. Being aware of the light
and seeking service promptly when it
comes on may prevent damage.
Caution
If the vehicle is driven continually
with this light on, the emission
control system may not work as
well, the fuel economy may be
lower, and the vehicle may not run
smoothly. This could lead to costly
repairs that might not be covered
by the vehicle warranty.
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 Modifications 0306.
If the light is f lashing : 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 0295. 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.