2020 CADILLAC XT4 trailer

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
DRIVING AND OPERATING 239
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.
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. See
Malfunction Indicator
Lamp (Check Engine Light) 0115.
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.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
VEHICLE CARE 265
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 socket
counterclockwise 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.
Replace a bad fuse with a new one of
the identical size and rating.
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.
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

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
VEHICLE CARE 267
FusesUsage
3 Antilock brake system pump Fuses
Usage
5 Trailer brake
6 Rear closure Fuses
Usage
7 Trailer stop/Turn LH
8 Memory seat module
9 Pedestrian friendly alert function
10 Semi-active damping system
11 DC DC Battery 1/2
12 Rear defogger
13 Heated mirror
14 –
15 Passive entry passive start
16 Front wiper
17 Passenger power seat
18 Power liftgate module
19 Driver power seat
21 Sunroof
22 Rear wiper
23 Trailer interface module 2

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
268 VEHICLE CARE
FusesUsage
26 Transmission control module/Ignition
27 Instrument panel body/Ignition
28 Rear wiper
29 Trailer ignition
30 Malfunction indicator lamp
32 Rear drive control module 1
33 Front heated seat
34 Handsfree/Window switch
35 Diesel exhaust fuel heater
36 Fuel module
39 Massage
40 Steering column lock
41 –
43 Heated steering wheel
44 Seat ventilation Fuses
Usage
46 Engine control module/Ignition
48 Rear drive control module 2
49 Heating ventilation/ Air conditioning
blower motor
50 –
51 –
54 –
55 –
56 Starter motor
57 –
58 –
59 High-beam headlamps left/right
60 Trailer interface module 1
61 –
62 –
63 – Fuses
Usage
65 Air conditioning control
67 –
68 –
69 –
70 Trailer park lamp
72 Starter pinion
75 Engine control module
76 Powertrain off engine
78 Horn
79 Washer pump
81 Transmission control module/Engine
control module/
Cooling pump
82 Nitrogen oxide sensor
83 Ignition coil
84 Powertrain on engine
85 Shunt
86 Shunt

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
VEHICLE CARE 269
FusesUsage
87 Diesel fuel heater 1
88 Aeroshutter
89 Selective catalytic reduction module
92 Trailer stop/Turn right
93 Automatic headlamp leveling/Canister vent
solenoid
95 Smart sensors
96 Diesel fuel heater 2
99 –
Relays Usage
4 –
20 Rear defogger
25 Front wiper control
31 Run/Crank
37 Front wiper speed
42 –
64 Starter motor Relays
Usage
66 Powertrain
71 Trailer park lamp
73 Air conditioning control
80 Starter pinion
90 Powertrain sensor
94 Diesel exhaust fuel heater
98 Diesel fuel heaterInstrument Panel Fuse
Block
The instrument panel fuse block is on
the driver side of the instrument
panel, between the steering wheel and
the door. To access the fuses, remove
the panel, starting at the top. Once
clips are disengaged, the tabs along
the bottom of the door can be
disengaged from the instrument panel
to remove the door.
To reinstall the door, place the bottom
tabs into the slots, and rotate the door
into position, engaging the clips.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
VEHICLE CARE 309
Towing the Vehicle
Caution
Incorrectly towing a disabled
vehicle may cause damage. The
damage would not be covered by
the vehicle warranty. Do not lash or
hook to suspension components.
Use the proper straps around the
tires to secure the vehicle. Do not
drag a locked wheel/tire. Use tire
skates or dollies under any locked
wheel/tire while loading the vehicle.
Do not use a sling type lift to tow
the vehicle. This could damage the
vehicle.
Caution
If the vehicle cannot be shifted into
Neutral (N), do not use the tow eye
to tow the vehicle. Vehicle damage
may occur.GM recommends a flatbed tow truck
to transport a disabled vehicle. Use
ramps to help reduce approach angles,
if necessary. A towed vehicle should
have its drive wheels off the ground.
Contact Roadside Service or a
professional towing service if the
disabled vehicle must be towed.
The vehicle is equipped with specific
attachment points to be used by the
towing provider. These holes may be
used to pull the vehicle from a flat
road surface onto the flatbed tow
truck.
Recreational Vehicle
Towing
Caution
Dolly towing or dinghy towing the
vehicle may cause damage because
of reduced ground clearance.
Always put the vehicle on a flatbed
truck or trailer.
The vehicle was neither designed nor
intended to be towed with any of its
wheels on the ground. If the vehicle
must be towed, see Towing the Vehicle
0 309.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
SERVICE AND MAINTENANCE 319
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 Limits 0168.
. Are driven on reasonable road
surfaces within legal driving limits.
. Use the recommended fuel. See
Recommended Fuel 0226.
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 0243.
Maintenance Schedule
Owner Checks and Services
At Each Fuel Stop
.
Check the engine oil level. See
Engine Oil 0247.
Once a Month
. Check the tire inflation pressures.
See Tire Pressure 0279.
. Inspect the tires for wear. See Tire
Inspection 0285.
. Check the windshield washer fluid
level. See Washer Fluid 0256.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km/600 mi. If driven
under the best conditions, the engine
oil life system may not indicate the
need for vehicle service for up to a
year. The engine oil and filter must be
changed at least once a year and the
oil life system must be reset. Your
trained dealer technician can perform
this work. If the engine oil life system

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 9/5/19
INDEX 369
System (cont'd)Forward Collision Alert (FCA) . . . . 215
Infotainment . . . . . . . . . . . . . . . . . 147, 349
Roof Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Systems Driver Assistance . . . . . . . . . . . . . . . . . 206
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . 111
Text Telephone (TTY) Users . . . . . . . 338
Theft-Deterrent Systems . . . . . . . . . . . . 30Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . 30
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 All-Season . . . . . . . . . . . . . . . . . . . . . . . . . 273
Buying New Tires . . . . . . . . . . . . . . . . . 287
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Compact Spare . . . . . . . . . . . . . . . . . . . . 305
Designations . . . . . . . . . . . . . . . . . . . . . . 276
Different Size . . . . . . . . . . . . . . . . . . . . . . 289
If a Tire Goes Flat . . . . . . . . . . . . . . . . 292
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 285
Pressure . . . . . . . . . . . . . . . . . . . . . . 279, 280
Pressure Light . . . . . . . . . . . . . . . . . . . . . 121
Pressure Monitor Operation . . . . . . 281
Pressure Monitor System . . . . . . . . 281
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 Tires (cont'd)
Sealant and Compressor Kit . . . . . 293
Sealant and Compressor Kit,
Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Sidewall Labeling . . . . . . . . . . . . . . . . . 274
Terminology and Definitions . . . . 276
Uniform Tire Quality Grading . . . . 289
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Wheel Replacement . . . . . . . . . . . . . . 291
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . 226
Towing
Driving Characteristics . . . . . . . . . . . 230
Equipment . . . . . . . . . . . . . . . . . . . . . . . . 236
General Information . . . . . . . . . . . . . . 229
Recreational Vehicle . . . . . . . . . . . . . . 309
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Trailer Sway Control (TSC) . . . . . . . 238
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Traction
Control System(TCS)/StabiliTrak Light . . . . . . . . . 120
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . . 191 Trailer
Sway Control (TSC) . . . . . . . . . . . . . . . 238
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 182
Fluid, Automatic . . . . . . . . . . . . . . . . . . 250
Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . 111
Turn and Lane-Change Signals . . . . 143
U
Umbrella Storage . . . . . . . . . . . . . . . . . . . . 95
Uniform Tire Quality Grading . . . . . . 289
Universal Remote System . . . . . . . . . . 136 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Programming . . . . . . . . . . . . . . . . . . . . . . 136
Using This Manual . . . . . . . . . . . . . . . . . . . . 2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . . . . . . 29
Canadian Owners . . . . . . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Identification Number (VIN) . . . . . 332
Load Limits . . . . . . . . . . . . . . . . . . . . . . . 168
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Personalization . . . . . . . . . . . . . . . . . . . 131