2022 CADILLAC CT4 fuses

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
INTRODUCTION 3
H:Flammable
[:Forward Collision Alert
R:Fuse Block Cover Lock Location
+:Fuses
j:ISOFIX/LATCH System Child
Restraints
Q: Keep Fuse Block Covers Properly
Installed
|: Lane Change Alert
@:Lane Departure Warning
A:Lane Keep Assist
*: Malfunction Indicator Lamp
::Oil Pressure
X:Park Assist
~:Pedestrian Ahead Indicator
O:Power
7:Rear Cross Traffic Alert
I:Registered Technician
/:Remote Vehicle Start
h:Risk of Electrical Fire
>:Seat Belt Reminders
I:Side Blind Zone Alert
h:Stop/Start
7:Tire Pressure Monitor
d:Traction Control/StabiliTrak/
Electronic Stability Control (ESC)
a: Under Pressure
k: Vehicle Ahead Indicator

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
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Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
322 VEHICLE CARE
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 323
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 323
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 323
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 324
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 326
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 331
Engine Oil Life System . . . . . . . . . . . 333
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Manual Transmission Fluid . . . . . 335
Hydraulic Clutch . . . . . . . . . . . . . . . . . 335
Engine Air Filter Life System . . . . 335
Engine Air Cleaner/Filter . . . . . . . . . 336
Cooling System . . . . . . . . . . . . . . . . . . . 338
Engine Overheating . . . . . . . . . . . . . . 342
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 343
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344 Brake Pad Life System (If
Equipped) . . . . . . . . . . . . . . . . . . . . . . . 346
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 348
Battery - North America . . . . . . . . . 349
All-Wheel Drive . . . . . . . . . . . . . . . . . . 349
Park Brake and P (Park) Mechanism Check . . . . . . . . . . . . . . 350
Wiper Blade Replacement . . . . . . . 350
Windshield Replacement . . . . . . . . 351
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 351Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . 352
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 352
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . 352
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . . . . . 352
LED Lighting . . . . . . . . . . . . . . . . . . . . . 353
Front Turn Signal Lamps . . . . . . . . 353
Electrical System
Electrical System Overload . . . . . . 353
Fuses and Circuit Breakers . . . . . . 355
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Instrument Panel Fuse Block . . . . 358
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
All-Season Tires . . . . . . . . . . . . . . . . . . 363
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 364
Run-Flat Tires . . . . . . . . . . . . . . . . . . . . 364
Self-Sealing Tires . . . . . . . . . . . . . . . . . 365
Low-Profile Tires . . . . . . . . . . . . . . . . . 365
Summer Tires . . . . . . . . . . . . . . . . . . . . 365
Tire Sidewall Labeling . . . . . . . . . . . 366
Tire Designations . . . . . . . . . . . . . . . . . 367
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . . . . . 368
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 370
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . 371
Tire Pressure Monitor System . . . 372
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 373
Tire Inspection . . . . . . . . . . . . . . . . . . . 376
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 376
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Buying New Tires . . . . . . . . . . . . . . . . 379
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Uniform Tire Quality Grading . . . 380
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 382
Wheel Replacement . . . . . . . . . . . . . . 382
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 383

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
VEHICLE CARE 353
LED Lighting
This vehicle has several LED lamps.
For replacement of any LED lighting
assembly, contact your dealer.
Front Turn Signal Lamps
Uplevel
See your dealer for turn signal
replacement.
Base level
To replace one of these lamps:1. Open the hood.
2. If your vehicle is equipped with a beauty cover, remove the beauty
cover to get access to the bulb.3. Turn the bulb socketcounterclockwise to remove it from
the headlamp assembly.
4. Unplug the electrical connector from the bulb by releasing the clip
on the connector.
5. Replace the bulb and reverse Steps 1–4 to reinstall.
Electrical System
Electrical System Overload
The vehicle has fuses and circuit
breakers to protect against an
electrical system overload.
When the current electrical load is too
heavy, the circuit breaker opens and
closes, protecting the circuit until the
current load returns to normal or the
problem is fixed. This greatly reduces
the chance of circuit overload and fire
caused by electrical problems.
Fuses and circuit breakers protect
power devices in the vehicle.
If there is a problem on the road and
a fuse needs to be replaced, the
same amperage fuse can be borrowed.
Choose some feature of the vehicle
that is not needed to use and replace
it as soon as possible.
To check a fuse, look at the band
inside the fuse. If the band is broken
or melted, replace the fuse. Be sure to
replace a bad fuse with a fuse of the
identical size and rating.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
VEHICLE CARE 355
Headlamp Wiring
An electrical overload may cause the
lamps to go on and off, or in some
cases to remain off. Have the
headlamp wiring checked right away if
the lamps go on and off or remain off.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop. Wiper function is
available immediately after the wiper
switch is set to off, and back to on.
To protect the wiper motor from
overheating, the wipers may slow
down when the windshield is dry for a
long period of time. If a period of dry
operation, or little moisture, exceeds
10 minutes, the wipers may switch to
intermittent operation, and remain
there. When moisture is again
detected on the windshield, wiper
operation will return to the operator
selected speed.
Although the circuit is protected from
electrical overload, overload due to
heavy snow or ice may cause wiperlinkage damage. Always clear ice and
heavy snow from the windshield
before using the windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses and circuit
breakers. This greatly reduces the
chance of damage caused by electrical
problems.
{Danger
Fuses and circuit breakers are
marked with their ampere rating.
Do not exceed the
specified amperage rating when
replacing fuses and circuit breakers.
Use of an oversized fuse or circuit
breaker can result in a vehicle fire.
You and others could be seriously
injured or killed.
{Warning
Installation or use of fuses that do
not meet GM’s original fuse
specifications is dangerous. The
fuses could fail, and result in a fire.
You or others could be injured or
killed, and the vehicle could be
damaged.
See Accessories and Modifications
0 323 and
General Information 0323.
To check or replace a blown fuse, see
Electrical System Overload 0353.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
356 VEHICLE CARE
Engine Compartment Fuse
Block
The engine compartment fuse block is
on the driver side of the engine
compartment.
Lift the fuse block cover to access the
fuses.
The vehicle may not be equipped with
all of the fuses and relays shown.
Caution
Spilling liquid on any electrical
component on the vehicle may
damage it. Always keep the covers
on any electrical component.
FusesUsage
1 Long Range Radar Front Sensor
2 Park/Daytime Running Lamps
3 Exterior Lighting Module 4
4 Exterior Lighting Module 7
5 Headlamp Level Fuses
Usage
6 –
7 Electronic Brake Control Module
8 Washer Pump
9 –
10 –
11 –
12 Horn

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
VEHICLE CARE 357
FusesUsage
13 Front Wiper
14 Exterior Lighting Module 6
15 Exterior Lighting Module 1
16 Exterior Lighting Module 5
17 Exterior Lighting Module 3
18 Aero Shutter
19 –
20 –
21 Virtual Key System/ Power Sounder
Module
22 Engine Control Module Battery
23 Transmission Control Module
24 Active Engine Mount
25 –
26 Engine Control Module Fuses
Usage
27 Injectors/Ignition 2
28 Charged Air Cooler
29 Transmission Aux Oil Pump/Transmission
Reverse Lock Out
30 Injectors/Ignition 1
31 Emissions 1
32 Emissions 2
33 Starter Solenoid
34 –
35 –
36 Starter Pinion
37 AC Clutch
38 –
39 –
40 –
41 –
42 Water Pump
43 –
44 – Relays
Usage
47 –
48 Front Wiper Speed
49 Front Wiper Control
51 –
52 Engine Control Module
53 Starter Solenoid
54 Starter Pinion
55 –
57 AC Clutch
58 –

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
358 VEHICLE CARE
Instrument Panel Fuse
Block
The instrument panel fuse block is in
the end of the driver side of the
instrument panel.
To access the fuses, remove the end
panel by gently prying with a plastic
tool near each clip, beginning at the
point shown.
To install the end cover, insert the
tabs on the back of the cover into the
slots in the instrument panel at the
points shown. Align the clips with the
slots in the instrument panel, and
press the cover into place.
The vehicle may not be equipped with
all of the fuses and relays shown.