2023 CADILLAC XT4 Owners Manual

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
352 Vehicle Care
4. Turn the bulb socketcounterclockwise and pull
the bulb straight out of the
socket.
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.Replacing a Blown Fuse
1. Turn off the vehicle.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 353
2. Locate the fuse puller inthe engine compartment
fuse block.3. Use the fuse puller toremove the fuse from the
top or side, as shown
above.
4. If the fuse must be replaced immediately,
borrow a replacement fuse
with the same amperage
from the fuse block.
Choose a vehicle feature
that is not needed to
safely operate the vehicle.
Repeat Steps 2-3.
5. Insert the replacement fuse into the empty slot of
the blown fuse.
At the next opportunity, see
your dealer to replace the
blown fuse.
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
until the motor cools and will
then restart.
Although the circuit is
protected from electrical
overload, overload due to
heavy snow or ice may cause
wiper linkage 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.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
354 Vehicle Care
{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(Continued)
Warning (Continued)
or others could be injured or
killed, and the vehicle could
be damaged.
See Accessories and
Modifications 0327 and
General Information 0327.
To check or replace a blown
fuse, see Electrical System
Overload 0352.
Engine Compartment
Fuse Block
The underhood fuse block is in
the engine compartment, on
the driver side of the vehicle.
Caution
Do not pull the engine
compartment fuse block
lever, since it is intended
only for service purposes.
If pulled, vehicle malfunction
may occur.
Caution
Spilling liquid on any
electrical component on the
vehicle may damage it.
Always keep the covers on
any electrical component.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 355
To remove the fuse block
cover, press the clips on the
cover and lift it straight up.
The vehicle may not be
equipped with all of the fuses,
relays, and features shown.
Fuses Usage3 EBCM –
Electronic Brake
Control Module Fuses Usage
5 –
6 –

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
356 Vehicle Care
Fuses Usage7 TRLR ST/TRN LT –Left Trailer
Stop/Turn Lamp
–
8 MSM –Memory
Seat Module –
Driver and
Passenger
9 –
10 SADS –
Semi-active
Damping System/
Spare
–
11 DC DC BAT 2 –
Direct Current to
Direct Current
Converter 2
12 REAR DEFOGGER –
Rear Window
Defogger Fuses Usage
13 OSRVM DEFOG –Outside Rear
View Mirrors
Defogger
14 –
15 PEPS –Passive
Entry Passive
Start Module
16 FRT WIPERS –
Front Wiper
17 PASS/PWR/ SEAT–
Passenger
Power Seat
–
18 L/GATE MTR/ Spare–Liftgate
Motor/Spare
19 DRVR/PWR/ SEAT–Driver
Power Seat/
Memory Seat
Module/Driver
Seat Massage
Control Fuses Usage
21 Sunroof –Power
Sunroof
–
22 –
23 –
26 TCM IGN –
Transmission
Control Module
Ignition
27 Miscellaneous 1 –
Inside Rear View
Mirror –Shifter
Interface Board
Module Run/
Crank –Central
Gateway Module
Run/Crank –
Heating
Ventilation and
Air Conditioning
Control Module
Run/Crank
ignition 3 –
Forward Collision
Alert Display

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 357
Fuses Usage28 Rear Wipers –
Rear Wiper
29 –
30 Miscellaneous 2 –
Fuel Tank Zone
Module Run/
Crank –Direct
Current to Direct
Current
Transformer
Run/Crank –
Electronic Brake
Control Module
Run/Crank –
Instrument Panel
Cluster Run/
Crank
32 RDCM 2/Spare –
Rear Drive
Control Module 1/
Spare
33 FRT 2/HTD ST/ Spare–Front
Heated Seat
Power 2/Spare Fuses Usage
34 HFCR MDL/LGM/ WNDW SW –
Handsfree
Closure Release
Module/Liftgate
Module/Driver
and Passenger
Window Switches
35 –
36 FTZM –Fuel
Tank Zone
Module
39 FRT ST MASGE –
Driver Seat
Massage/
Passenger Seat
Massage
–
40 –
41 –
43 HTD/STR/WHL/ Spare–Heated
Steering Wheel/
Spare
– Fuses Usage
44 FRT 1/HTD/VENT ST/RR HTD ST/
Spare–Front
Heated Seat
Power Feed 1/
Front Vented
Seats/Rear
Heated Seats/
Spare
–
46 ECM IGN –
Engine Control
Module Ignition
48 RDCM 1/Spare –
Rear Drive
Control Module 1/
Spare
–
49 HVAC BLOWR MTR–Heating
Ventilation and
Air Conditioning
Control Blower
Motor
50 Spare

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
358 Vehicle Care
Fuses Usage51 Spare
54 Spare
55 Spare
56 STARTER MOTOR –Starter
Motor
57 –
58 –
59 HDLP HI BEAM LT/RT–High
Beam Headlamps
60 –
61 Spare
62 Spare
63 Spare
65 A/C CONTROL –
Air Conditioning
Compressor
Clutch Fuses Usage
67 Spare
68 Spare
69 –
70 TRLR PRK LAMP –TRAILER PARK
LAMPS
–
72 STRTR PINION –
STARTER
PINION
74 –
75 ECM PWRTRN IGN 2–Engine
Control Module
Power Train
Ignition 2
76 ECM PWRTRN IGN 1–Engine
Control Module
Power Train
Ignition 1 Fuses Usage
78 Horn
79 WASH PUMPS –
Front and Rear
Washer Pumps
81 ECM –Engine
Control Module
Battery/Spare
82 –
83 IGNITION COILS –Ignition Coils

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Vehicle Care 359
Fuses Usage84 Miscellaneous 3 –
Canister Purge
Solenoid/
Step Cam
Exhaust Solenoid
Cylinder 2 and 3/
Step Cam Intake
Cylinder
Solenoids/Turbo
Bypass Solenoid/
Oxygen Sensor
(Pre & Post))/
Step Cam
Exhaust
Solenoids/O2
Heater/Oxygen
Heated Sensor/
Mass Airflow/
Inlet Air
Temperature/
Throttle Inlet
Absolute
Pressure/
Humidity Sensor/
Coolant Flow
Control Valve
85 Shunt Fuses Usage
86 –
87 –
88 AEROSHUTTER/ Spare–
Aeroshutter
–
89 –
92 TRLR ST/TRN RT/Spare –
Trailer Stop/Turn
Lamp Right/
Spare
93 AHL/CVS –
Canister Vent
Solenoid
95 –
96 –
99 – Relays Usage
20 REAR DEFOGGER –
Rear Defogger/
Outside Rear
View Mirrors
Defogger
25 Front Wiper Control
31 Run/Crank
37 Front Wiper Speed
42 –
64 Starter Motor
66 Powertrain 71 TRAILER PARK LAMPS –Trailer
Park Lamps
–
73 A/C CONTROL –
Air Conditioning
Controls
80 Starter Pinion
90 –