trailer CADILLAC XT4 2022 Owner's Guide

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 1/4/22
DRIVING AND OPERATING 283
Trailer Wiring Harness
Basic Trailer Wiring
The trailer wiring harness is located at
the rear of the vehicle and is tied to
the vehicle's frame. The harness
connector can be plugged into a
trailer connector available through
your dealer.
Trailer Lamps
Always check all trailer lamps are
working at the beginning of each trip,
and periodically on longer trips.
Turn Signals When Towing a
Trailer
When properly connected, the trailer
turn signals will illuminate to indicate
the vehicle is turning, changing lanes,
or stopping. When towing a trailer,
the arrows on the instrument cluster
will illuminate even if the trailer is not
properly connected or the bulbs are
burned out.
Trailer Sway Control (TSC)
Vehicles with StabiliTrak/Electronic
Stability Control (ESC) have a Trailer
Sway Control (TSC) feature. Trailersway is unintended side-to-side
motion of a trailer while towing. If the
vehicle is towing a trailer and the TSC
detects that sway is increasing, the
vehicle brakes are selectively applied
at each wheel, to help reduce
excessive trailer sway. If equipped with
the Integrated Trailer Brake Control
(ITBC) system, and the trailer has an
electric brake system, StabiliTrak/ESC
may also apply the trailer brakes.
If TSC is enabled, the Traction Control
System (TCS)/StabiliTrak/ESC warning
light will flash on the instrument
cluster. Reduce vehicle speed by
gradually removing your foot from the
accelerator. If trailer sway continues,
StabiliTrak/ESC can reduce engine
torque to help slow the vehicle. TSC
will not function if StabiliTrak/ESC is
turned off. See
Traction Control/
Electronic Stability Control 0235.
{Warning
Trailer sway can result in a crash
and in serious injury or death, even
if the vehicle is equipped with TSC.
If the trailer begins to sway, reduce
vehicle speed by gradually removing
your foot from the accelerator. Then
pull over to check the trailer and
vehicle to help correct possible
causes, including an improperly or
overloaded trailer, unrestrained
cargo, improper trailer hitch
configuration, or improperly
inflated or incorrect vehicle or
trailer tires. See Towing Equipment
0 281 for trailer ratings and hitch
setup recommendations.
Trailer Tires
Special Trailer (ST) tires differ from
vehicle tires. Trailer tires are designed
with stiff sidewalls to help prevent
sway and to support heavy loads.
These features can make it difficult to
determine if the trailer tire pressures
are low only based on a visual
inspection.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 1/4/22
284 DRIVING AND OPERATING
Always check all trailer tire pressures
before each trip when the tires are
cool. Low trailer tire pressure is a
leading cause of trailer tire blow-outs.
Trailer tires deteriorate over time. The
trailer tire sidewall will show the week
and year the tire was manufactured.
Many trailer tire manufacturers
recommend replacing tires more than
six years old.
Overloading is another leading cause
of trailer tire blow-outs. Never load
your trailer with more weight than the
tires are designed to support. The load
rating is located on the trailer tire
sidewall.
Always know the maximum speed
rating for the trailer tires before
driving. This may be significantly
lower than the vehicle tire speed
rating. The speed rating may be on
the trailer tire sidewall. If the speed
rating is not shown, the default trailer
tire speed rating is 105 km/h
(65 mph).Conversions and
Add-Ons
Add-On Electrical
Equipment
{Warning
The Data Link Connector (DLC) is
used for vehicle service and
Emission Inspection/Maintenance
testing. SeeMalfunction Indicator
Lamp (Check Engine Light) 0106.
A device connected to the DLC —
such as an aftermarket fleet or
driver-behavior tracking device —
may interfere with vehicle systems.
This could affect vehicle operation
and cause a crash. Such devices
may also access information stored
in the vehicle’s systems.
Caution
Some electrical equipment can
damage the vehicle or cause
components to not work and would
not be covered by the vehicle
warranty. Always check with your
dealer before adding electrical
equipment.
Add-on equipment can drain the
vehicle's 12-volt battery, even if the
vehicle is not operating.
The vehicle has an airbag system.
Before attempting to add anything
electrical to the vehicle, see Servicing
the Airbag-Equipped Vehicle 064 and
Adding Equipment to the
Airbag-Equipped Vehicle 064.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
306 VEHICLE CARE
2. Remove fasteners retaining thefront wheel liner.
3. Pull back wheel liner to expose back of turn signal lamp.
4. Remove turn signal bulb socketfrom lamp housing by rotating
counterclockwise.
5. Replace the bulb and reverse Steps 1–4 to reinstall.
Back-Up Lamps
To replace one of these bulbs:
1. Remove the fasteners to removethe trailer hitch cover.
2. Access the lamp through the opening in the underbody.
3. Disconnect the electrical connector from the bulb assembly.
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.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
310 VEHICLE CARE
FusesUsage
3 EBCM –Electronic
Brake Control Module Fuses
Usage
5 Trailer Brake –
Not Used Fuses
Usage
6 REAR CLOSR –Spare
7 TRLR ST/TRN LT –
Left Trailer Stop/
Turn Lamp
–
8 MSM –Memory Seat
Module –Driver and
Passenger
9 PFAF –Not Used
10 SADS –Semi-active
Damping System/
Spare
–
11 DC DC BAT 1/2 –
Direct Current to
Direct Current
Converter 1
12 REAR DEFOG –Rear
Window Defogger
13 HTD MIR –Outside
Rear View Mirrors
Defogger
14 –

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
VEHICLE CARE 311
FusesUsage
15 PEPS –Passive Entry
Passive Start Module
16 FRT/WPR –Front
Wiper
17 PASS/PWR/SEAT –
Passenger Power Seat
–
18 LGM MTR –Power
Liftgate
19 DRVR/PWR/SEAT –
Driver Power Seat/
Memory Seat Module/
Driver Seat Massage
Control
21 S/ROOF –Power
Sunroof
–
22 –
23 TIM 2 –Not Used
26 TCM IGN –
Transmission Control
Module/Ignition Fuses
Usage
27 IP BODY IGN –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
28 RR/WPR –Rear
Wiper
29 TRAILER IGN –
Not Used
30 MIL SS/TIM IGN –
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 Fuses
Usage
32 RDCM 1 –Rear Drive
Control Module 1
–
33 FRT HTD ST 2/Spare –Front Heated Seat
Power 2/Spare
–
34 HANDSFREE/WDO SW–Liftgate
Module/Front
Window Switches
35 DEFC 2/NOT USED –
/Not Used
36 FUEL MODULE –Fuel
Tank Zone Module
39 MASGE –Driver Seat
Massage/Passenger
Seat Massage
–
40 STR/COL/LCK –Spare
41 –

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
312 VEHICLE CARE
FusesUsage
43 HTD/STR/WHL –
Heated Steering
Wheel/Spare
–
44 FRT HTD 1 & VENT ST–Front Heated
Seat Power Feed 1/
Front Vented Seats/
Rear Heated Seats/
Spare
–
46 ECM IGN –Engine
Control Module
Ignition
48 RDCM 2 –Rear Drive
Control Module 2/
Spare
–
49 HVAC BLOWR MTR –
Heating Ventilation
and Air Conditioning
Control Blower Motor
50 Spare
51 Spare Fuses
Usage
54 Spare
55 Spare
56 STRTR MTR –Starter
Motor
57 –
58 –
59 HDLP HI BEAM LT/ RT–High Beam
Headlamps
60 TIM 1 –Not Used
61 Spare
62 Spare
63 Spare
65 A/C CLUTCH –Air
Conditioning Clutch
67 Spare
68 Spare
69 –
70 TRLR PRK LAMP –
Trailer Park Lamp
– Fuses
Usage
72 STRTR PINION –
Starter Pinion
75 ECM MAIN –Engine
Control Module Main
76 PT OFF ENG –
Powertrain Off Engine
– Engine Control
Module Power Train
Ignition 1
78 Horn
79 WASH PMP –Front
and Rear
Washer Pump
81 TCM/ECM/COOL PUMP–Engine
Control Module
Battery/Spare
82 NOx SNSR –
Not Used
83 IGN COIL –Ignition
Coils

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
VEHICLE CARE 313
FusesUsage
84 PT ON ENG –
Canister Purge
Solenoid/Step Cam
Exhaust Solenoid
Cylinder 2 and 3/
Step Cam Intake
Cylinder Solenoids/
Turbo Bypass
Solenoid/Oxygen
Sensor (Pre)/O2
Heater/Oxygen
Heated Sensor/Mass
Airflow/Inlet Air
Temperature/Throttle
Inlet Absolute
Pressure/Coolant Flow
Control Valve
85 Shunt
86 Shunt
87 DIESEL FUEL HTR 1 –
Not Used
88 AERO SH –
Aeroshutter
–
89 SCR MODULE –
Not Used Fuses
Usage
92 TRLR ST/TRN RT –
Spare
93 AHL/CVS –Canister
Vent Solenoid
95 SMART SENSORS –
Not Used
96 DIESEL FUEL HTR 2 –
Not Used
99 –
Relays Usage
20 REAR DEFOG –Rear
Defogger/Outside Rear
View Mirrors Defogger
25 FRT WPR CNTRL –
Front Wiper Control
31 RUN/CRNK –Run/
Crank
37 FRT WPR SPD –
Front Wiper Speed
42 –
64 STRTR MTR –Starter
Motor Relays
Usage
66 PWRTRN –
Powertrain
71 TRLR PRK LAMP –
Trailer Park Lamps
–
73 A/C CNTRL –Air
Conditioning Controls
80 STRTR PINION –
Starter Pinion
90 PWRTRN SNSR –
Not Used
94 DEFC –Not Used
98 DIESEL FUEL HTR –
Not Used

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
VEHICLE CARE 355
used to pull the vehicle from a flat
road surface onto the flatbed tow
truck.
Recreational Vehicle
Towing
Recreational vehicle towing means
towing the vehicle behind another
vehicle, such as behind a motor home.
The two most common types of
recreational vehicle towing are known
as dinghy towing and dolly towing.
Dinghy towing is towing the vehicle
with all four wheels on the ground.
Dolly towing is towing the vehicle
with two wheels on the ground and
two wheels up on a device known as a
dolly.
Here are some important things to
consider before recreational vehicle
towing:
.Become familiar with the local laws
that apply to recreational vehicle
towing. These laws may vary by
region.
.The towing capacity of the towing
vehicle. Be sure to read the tow
vehicle manufacturer's
recommendations.
.How far the vehicle will be towed.
Some vehicles have restrictions on
how far and how long they can be
towed.
.The proper towing equipment. See
your dealer or trailering professional
for additional advice and equipment
recommendations.
.If the vehicle is ready to be towed.
Just as preparing the vehicle for a
long trip, make sure the vehicle is
prepared to be towed.
Caution
Use of a shield mounted in front of
the vehicle grille could restrict
airflow and cause damage to the
transmission. The repairs would not
be covered by the vehicle warranty.
If using a shield, only use one that
attaches to the towing vehicle.
Dinghy Towing
Caution
If the vehicle is towed with all four
wheels on the ground, the
drivetrain components could be
damaged. The repairs would not be
covered by the vehicle warranty. Do
not tow the vehicle with all four
wheels on the ground.
The vehicle is neither designed nor
intended to be towed with all four
wheels on the ground. If the vehicle
must be towed, a dolly should be
used. See the following information on
dolly towing.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
368 SERVICE AND MAINTENANCE
The Tire Rotation and Required
Services are the responsibility of the
vehicle owner. It is recommended to
have your dealer perform these
services every 12 000 km/7,500 mi.
Proper vehicle maintenance helps to
keep the vehicle in good working
condition, improves fuel economy, and
reduces vehicle emissions.
Because of the way people use
vehicles, maintenance needs vary.
There may need to be more frequent
checks and services. The Additional
Required Services - Normal are for
vehicles that:
.Carry passengers and cargo within
recommended limits on the Tire
and Loading Information label. See
Vehicle Load Limits0214.
.Are driven on reasonable road
surfaces within legal driving limits.
.Use the recommended fuel. See
Recommended Fuel 0271. Refer to the information in the
Maintenance Schedule Additional
Required Services - Normal chart.
The Additional Required Services -
Severe are for vehicles that are:
.Mainly driven in heavy city traffic
in hot weather.
.Mainly driven in hilly or
mountainous terrain.
.Frequently towing a trailer.
.Used for high speed or competitive
driving.
.Used for taxi, police, or delivery
service.
Refer to the information in the
Maintenance Schedule Additional
Required Services - Severe chart.
{Warning
Performing maintenance work can
be dangerous and can cause serious
injury. Perform maintenance work
only if the required information,
proper tools, and equipment are
available. If they are not, see your
dealer to have a trained technician
do the work. See Doing Your Own
Service Work 0287.
Maintenance Schedule
Owner Checks and Services
Check the engine oil level. See Engine
Oil 0290.
Once a Month
.Check the tire inflation pressures.
See Tire Pressure 0325.
.Inspect the tires for wear. See Tire
Inspection 0331.
.Check the windshield washer fluid
level. See Washer Fluid 0299.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15440907) - 2022 - CRC - 12/17/21
416 INDEX
System (cont'd)Rear Cross Traffic Alert . . . . . . . . . . 260
Roof Rack . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Surround Vision . . . . . . . . . . . . . . . . . . 253
Systems Driver Assistance . . . . . . . . . . . . . . . . . 250
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . 103
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Text Telephone (TTY) Users . . . . . . . 387
Theft-Deterrent Systems . . . . . . . . . . . . 27Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . 27
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318 All-Season . . . . . . . . . . . . . . . . . . . . . . . . . 319
Buying New Tires . . . . . . . . . . . . . . . . . 334
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 346
Compact Spare . . . . . . . . . . . . . . . . . . . . 350
Designations . . . . . . . . . . . . . . . . . . . . . . 322
Different Size . . . . . . . . . . . . . . . . . . . . . . 335
If a Tire Goes Flat . . . . . . . . . . . . . . . . 338
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 331
Pressure . . . . . . . . . . . . . . . . . . . . . 325, 326
Pressure Light . . . . . . . . . . . . . . . . . . . . . 113
Pressure Monitor Operation . . . . . . 328
Pressure Monitor System . . . . . . . . 327 Tires (cont'd)
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Sealant and Compressor Kit . . . . . 340
Sealant and Compressor Kit,
Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Sidewall Labeling . . . . . . . . . . . . . . . . . 320
Terminology and Definitions . . . . 323
Uniform Tire Quality Grading . . . . 335
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Wheel Replacement . . . . . . . . . . . . . . 337
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . 271
Towing Driving Characteristics . . . . . . . . . . . 274
Equipment . . . . . . . . . . . . . . . . . . . . . . . . 281
General Information . . . . . . . . . . . . . . 274
Recreational Vehicle . . . . . . . . . . . . . . 355
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Trailer Sway Control (TSC) . . . . . . . 283
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Traction Control System(TCS)/StabiliTrak Light . . . . . . . . . 112
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . . . . . . 235
Trademarks and License Agreements . . . . . . . . . . . . . . . . . . . . . . . . 186
Trailer Sway Control (TSC) . . . . . . . . . . . . . . . 283
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 227
Fluid, Automatic . . . . . . . . . . . . . . . . . . 293
Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 390
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . 103
Turn and Lane-Change Signals . . . . 132
U
Umbrella Storage . . . . . . . . . . . . . . . . . . . . 88
Uniform Tire Quality Grading . . . . . . 335
Universal Remote System . . . . . . . . . . 126 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Programming . . . . . . . . . . . . . . . . . . . . . . 126
Updates Map Data . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Using the Navigation System . . . . . . 151
Using the System . . . . . . . . . . . . . . . . . . . 139
Using This Manual . . . . . . . . . . . . . . . . . . . . 2