window CADILLAC CT4 2023 Service Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
228 Climate Controls
control system will turn on and
deliver airflow per the current
setting.
9:Press button up or down
to increase or decrease the
fan speed.
Press AUTO to return to
automatic operation.
Driver and Passenger
Temperature Control : The
temperature can be adjusted
separately for the driver and
passenger.
Press button up or down to
increase or decrease the
driver or passenger
temperature setting.
The driver side or passenger
side temperature display
shows the temperature
setting increasing or
decreasing.
SYNC : Press to link the
passenger and rear climate
temperature settings,
if equipped, to the driver
setting. The SYNC indicator
light will turn on. When the passenger or rear climate
temperature settings are
adjusted, the SYNC indicator
light is off.
Air Delivery Mode Control :
Press
Y,[, orzto change
the direction of the airflow. An
indicator light comes on in the
selected mode button. Multiple
buttons can be selected
simultaneously.
Changing the mode cancels
the automatic operation and
the system goes into manual
mode. Press AUTO to return
to automatic operation.
z: This mode clears the
windows of fog or moisture.
Air is directed to the
windshield and side window
vents. The system
automatically forces outside
air into the vehicle and the air
conditioning compressor will
run, unless the outside
temperature is close to
freezing.
Y: Air is directed to the
instrument panel outlets.
[: Air is directed to the floor
outlets, with some to the
windshield, side window
outlets, outboard panel
outlets, and second row floor
outlets.
0: Press to clear the
windshield of fog or frost
more quickly. Air is directed to
the windshield and the side
window outlets. The air
conditioning compressor also
comes on, unless the outside
temperature is below freezing.
Do not drive the vehicle until
all windows are clear.
See Air Vents 0230.
A/C : Press to turn the air
conditioning system on or off.
An indicator light comes on to
show that the air conditioning
is enabled. If the fan is turned
off, the air conditioner will not
run. The A/C light will stay on

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Climate Controls 229
even if the outside
temperatures are below
freezing.
@:Press to turn on
recirculation. An indicator light
comes on. Air is recirculated to
quickly cool the inside of the
vehicle. It can also be used to
help reduce outside air and
odors that enter the vehicle.
The air conditioning
compressor also comes on
when this mode is activated.
Rear Window Defogger
The rear window defogger
uses a warming grid to remove
fog from the rear window.
K: Press to turn the rear
window defogger on or off. An
indicator light on the button
comes on to show that the
rear window defogger is on.
The rear window defogger
only works when the vehicle is
on. The defogger can be
turned off by turning the
vehicle off or to
accessory mode.
Caution
Using a razor blade or sharp
object to clear the inside
rear window can damage
the rear window defogger.
Repairs would not be
covered by the vehicle
warranty. Do not clear the
inside rear window with
sharp objects.
Heated Mirror : If equipped
with heated outside mirrors,
the mirrors heat to help clear
fog or frost from the surface
of the mirror when the rear
window defog button is
pressed. See Heated Mirrors
0 30.
Remote Start Climate
Control Operation :
If equipped with remote start,
the climate control system
may run when the vehicle is
started remotely. The rear
defog may come on during
remote start based on cold ambient conditions. The rear
defog indicator light does not
come on during a remote start.
If equipped, the heated seats
will turn on if it is cold outside
or the ventilated seats will
turn on if it is hot outside. The
heated and ventilated seat
indicator lights may not come
on during a remote start.
If equipped, the heated
steering wheel will come on in
a remote start if it is cold
outside. The heated steering
wheel indicator light may not
come on.
Ionizer :
If equipped with an
ionizer, this feature helps to
clean the air inside the vehicle
and remove contaminants
such as pollen, odors, and
dust. If the climate control
system is on and the ionizer is
enabled, the ionizer status
indicator will be lit on the
climate control display. To turn
the Ionizer off or on, select

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
254 Driving and Operating
are clear. Avoid sudden
steering maneuvers and
braking while on ice.
.Turn off cruise control.
.Select All-Wheel Drive (AWD)
Mode for vehicles equipped
with AWD. Select Snow/Ice
Mode for FWD only vehicles.
See Driver Mode Control
0292 and
All-Wheel Drive 0286.
Cold Weather Mode
In very low temperatures, a
cold weather message may
display on the Driver
Information Center (DIC). The
engine speed, transmission
shift patterns, and cabin fan
speed may operate differently
to enable the vehicle to warm
up quicker. You can manually
override the cabin fan speed in
cold weather mode.
Blizzard Conditions
Stop the vehicle in a safe
place and signal for help. Stay
with the vehicle unless there is
help nearby. If possible, use Roadside Assistance. See
Roadside Assistance Program
0
487. To get help and keep
everyone in the vehicle safe:
.Turn on the hazard warning
flashers.
.Tie a red cloth to an outside
mirror.
{Warning
Snow can trap engine
exhaust under the vehicle.
This may cause exhaust
gases to get inside. Engine
exhaust contains carbon
monoxide (CO), which cannot
be seen or smelled. It can
cause unconsciousness and
even death.
If the vehicle is stuck
in snow:
.Clear snow from the base
of the vehicle, especially
any blocking the
exhaust pipe.
(Continued)
Warning (Continued)
.Open a window about
5 cm (2 in) on the vehicle
side that is away from the
wind, to bring in fresh air.
.Fully open the air outlets
on or under the
instrument panel.
.Adjust the climate control
system to circulate the air
inside the vehicle and set
the fan speed to the
highest setting. See
“Climate Control Systems.”
For more information about
CO, see Engine Exhaust
0 271.
To save fuel, run the engine
for short periods to warm the
vehicle and then shut the
engine off and partially close
the window. Moving about to
keep warm also helps.
If it takes time for help to
arrive, when running the
engine, push the accelerator
pedal slightly so the engine

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 267
Warning (Continued)
cause a fire, property
damage, electric shock,
and injury.
.Do not operate the vehicle
with the heater cord
permanently attached to
the vehicle. Possible
heater cord and
thermostat damage could
occur.
.While in use, do not let the
heater cord touch vehicle
parts or sharp edges.
Never close the hood on
the heater cord.
.Before starting the
vehicle, unplug the cord,
reattach the cover to the
plug, and securely fasten
the cord. Keep the cord
away from any moving
parts.
5. Before starting the engine, be sure to unplug and
store the cord as it was
before to keep it away from moving engine parts.
If you do not, it could be
damaged.
Contact your dealer for
information on how long to
use the heater in your
particular area.
Retained Accessory
Power (RAP)
When the vehicle is turned
from on to off, the following
features (if equipped) will
continue to function for up to
10 minutes, or until the driver
door is opened. These
features will also work when
the vehicle is on or in
accessory mode:
.Infotainment System
.Power Windows (during RAP
this functionality will be lost
when any door is opened)
.Sunroof (during RAP this
functionality will be lost
when any door is opened)
.Auxiliary Power Outlet
.Audio System
.OnStar System
Shifting Into Park
(Mechanical Shifter)
1. Hold the brake pedal down and set the parking brake.
See Electric Parking Brake
0287.
2. Move the shift lever into P (Park) by holding in the
button on the shift lever
and pushing the shift lever
all the way toward the
front of the vehicle.
3. Turn the ignition off.
Leaving the Vehicle with
the Engine Running
{Warning
It can be dangerous to leave
the vehicle with the engine
running. It could overheat
and catch fire. (Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
272 Driving and Operating
Warning (Continued)
If unusual fumes are
detected or if it is suspected
that exhaust is coming into
the vehicle:
.Drive it only with the
windows completely down.
.Have the vehicle repaired
immediately.
Never park the vehicle with
the engine running in an
enclosed area such as a
garage or a building that has
no fresh air ventilation.
Running the Vehicle
While Parked
It is better not to park with the
engine running. See Engine
Exhaust 0271.
If the vehicle is left with the
engine running, follow the
proper steps to be sure the vehicle will not move. See
Shifting Into Park (Mechanical
Shifter)
0267 or
Shifting Into Park (Electronic
Shifter) 0268 and
Electric Parking Brake 0287.
Automatic
Transmission
Automatic
Transmission
(Mechanical Shifter)
There are several different
positions for the shift lever.
P : This position locks the
drive wheels. Use P (Park)
when starting the vehicle to
ensure the vehicle does
not move.
{Warning
It is dangerous to get out of
the vehicle if the shift lever
is not fully in P (Park) with
the parking brake firmly set.
The vehicle can roll.
Do not leave the vehicle
when the engine is running
unless you have to. If you
have left the engine running,
the vehicle can move
suddenly. You or others
could be injured. To be sure
the vehicle will not move,
even when you are on fairly
level ground, always set the
parking brake and move the
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
360 Driving and Operating
If equipped, the following
driver assistance features
should be turned to alert or
off when towing a trailer:
.Automatic Emergency
Braking (AEB)
.Intelligent Brake Assist (IBA)
.Front Pedestrian
Braking (FPB)
If equipped with Lane Change
Alert (LCA), the LCA detection
zones that extend back from
the side of the vehicle do not
move further back when a
trailer is towed. Use caution
while changing lanes when
towing a trailer.
If equipped with Rear Cross
Traffic Alert (RCTA), use
caution while backing up when
towing a trailer, as the RCTA
detection zones that extend
out from the back of the
vehicle do not move further
back when a trailer is towed.
{Warning
To prevent serious injury or
death from carbon monoxide
(CO), when towing a trailer:
.Do not drive with the
liftgate, trunk/hatch,
or rear-most
window open.
.Fully open the air outlets
on or under the
instrument panel.
.Adjust the climate control
system to a setting that
brings in only outside air.
See “Climate Control
Systems” in the Index.
For more information about
carbon monoxide, see
Engine Exhaust 0271.
Towing a trailer requires
experience. The combination
of the vehicle and trailer is
longer and not as responsive
as the vehicle itself. Become
familiar with handling and braking 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
Equipment
0365. 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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
392 Vehicle Care
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 the
pressure cap, is hot. Wait for
the cooling system and
pressure cap to cool.
If No Steam Is Coming
from the Engine
Compartment
If an engine overheat warning
is displayed but no steam can
be seen or heard, the problem
may not be too serious.
Sometimes the engine can get
a little too hot when the
vehicle:
.Climbs a long hill on a
hot day.
.Stops after high-speed
driving.
.Idles for long periods in
traffic.
If the overheat warning is
displayed with no sign of
steam: 1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and
to the highest fan speed.
Open the windows as
necessary. 3. When it is safe to do so,
pull off the road, shift to
P (Park) or N (Neutral) and
let the engine idle.
If the overheat warning no
longer displays, the vehicle
can be driven. Continue to
drive the vehicle slowly for
about 10 minutes. Keep a safe
vehicle distance from the
vehicle in front. If the warning
does not come back on,
continue to drive normally and
have the cooling system
checked for proper fill and
function.
If the warning continues, pull
over, stop, and park the
vehicle right away.
If there is no sign of steam,
idle the engine for
three minutes while parked.
If the warning is still displayed,
turn off the engine until it
cools down.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
412 Vehicle Care
Fuses Usage
1 Remote FunctionActuator
2 –
Fuses Usage
3 Driver Heated Seat
4 Fuel Tank Zone
Module
5 –
6 –
7 –
8 –
9 –
10 Motor Seat Belt Passenger
11 Canister Vent Solenoid
12 Sunroof
13 –
14 –
15 Passenger Heated Seat
16 –
17 Electronic Suspension Control
18 –
19 Motor Seat Belt Driver
20 Rear Defog 21 DC to DC Transformer 2
Fuses Usage
22 Driver Power
Window/Door Handle
Switch
23 External Object Calculating Module/
Front Camera
Module/High
Definition Localization
Module/Short Range
Radar
24 Passenger Power Window/Door Handle
Switch
25 –
26 Amplifier (V-Series Blackwing)
27 Rear Drive Control Module
28 –
29 –
30 –
31 DC to DC Transformer 1
32 Transfer Case Electronic Control
33 Central Gateway Module/Side Blind
Zone Alert
34 Video Processing Module

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Vehicle Care 413
Fuses Usage
35 Hands Free ClosureRelease
36 Exterior Lighting Module 2
37 Passenger Memory Seat Module
38 –
39 Right Front/Right Rear Window
40 –
41 –
42 Amplifier
43 Park Assist Module
44 Driver Memory Seat Module
45 OnStar
46 –
47 –
48 –
49 –
50 Driver Seat 51 Left Front/Left Rear Window
52 Passenger Seat
Relays Usage
53 –
54 –
55 Run
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
(Continued)
Warning (Continued) flexing. There could be
a blowout and a serious
crash. See Vehicle Load
Limits 0255.
.Underinflated tires
pose the same danger
as overloaded tires. The
resulting crash could
cause serious injury.
Check all tires
frequently to maintain
the recommended
pressure. Tire pressure
should be checked
when the tires are cold.
.Overinflated tires are
more likely to be cut,
punctured, or broken by
a sudden impact —such
as when hitting a
pothole. Keep tires at
the recommended
pressure.
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
442 Vehicle Care
If the vehicle has an
accessory power outlet, do
not use the cigarette
lighter.
If the vehicle only has a
cigarette lighter, use the
cigarette lighter.
Do not pinch the power
plug cord in the door or
window.
9. Start the vehicle. The vehicle must be running
while using the air
compressor.
10. Press the on/off button (5) to turn the tire sealant and
compressor kit on.
The compressor will inject
sealant and air into
the tire.
The pressure gauge (8) will
initially show a high
pressure while the
compressor pushes the
sealant into the tire. Once
the sealant is completely
dispersed into the tire, the
pressure will quickly drop and start to rise again as
the tire inflates with
air only.
11. Inflate the tire to the recommended inflation
pressure using the
pressure gauge (8). The
recommended inflation
pressure can be found on
the Tire and Loading
Information label. See Tire
Pressure 0422.
The pressure gauge (8)
may read higher than the
actual tire pressure while
the compressor is on. Turn
the compressor off to get
an accurate pressure
reading. The compressor
may be turned on/off until
the correct pressure is
reached.
Caution
If the recommended
pressure cannot be reached
after approximately
25 minutes, the vehicle (Continued)
Caution (Continued)
should not be driven farther.
The tire is too severely
damaged and the tire
sealant and compressor kit
cannot inflate the tire.
Remove the power plug
from the accessory power
outlet and unscrew the
inflating hose from the tire
valve. See Roadside
Assistance Program 0487.
12. Press the on/off button (5) to turn the tire sealant and
compressor kit off.
The tire is not sealed and
will continue to leak air
until the vehicle is driven
and the sealant is
distributed in the tire.
Therefore, Steps 13–
21 must be done
immediately after Step 12.
Be careful while handling
the tire sealant and
compressor kit as it could
be warm after usage.