2021 CADILLAC XT6 headlamp

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
VEHICLE CARE 303
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 304
California Proposition65 Warning . . . . . . . . . . . . . . . . . . . . . 304
California Perchlorate Materials Requirements . . . . . . . . . . . . . . . . . . . 305
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 305
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 305
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 308
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 311
Engine Oil Life System . . . . . . . . . . . 313
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Engine Air Filter Life System . . . . 314
Engine Air Cleaner/Filter . . . . . . . . . 315
Cooling System . . . . . . . . . . . . . . . . . . . 316
Engine Overheating . . . . . . . . . . . . . . 320
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 321
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 322 Battery - North America . . . . . . . . . 323
All-Wheel Drive . . . . . . . . . . . . . . . . . . 324
Park Brake and P (Park)
Mechanism Check . . . . . . . . . . . . . . 324
Wiper Blade Replacement . . . . . . . 325
Windshield Replacement . . . . . . . . 326
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 326
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . 327
Bulb Replacement
LED Lighting . . . . . . . . . . . . . . . . . . . . . 327
Electrical System
Electrical System Overload . . . . . . 327
Fuses and Circuit Breakers . . . . . . 328
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Instrument Panel Fuse Block . . . . 332
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
All-Season Tires . . . . . . . . . . . . . . . . . . 337
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 338
Summer Tires . . . . . . . . . . . . . . . . . . . . 338
Tire Sidewall Labeling . . . . . . . . . . . 339 Tire Designations . . . . . . . . . . . . . . . . . 340
Tire Terminology and
Definitions . . . . . . . . . . . . . . . . . . . . . . 341
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 343
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . 345
Tire Pressure Monitor System . . . 346
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 347
Tire Inspection . . . . . . . . . . . . . . . . . . . 350
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 351
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Buying New Tires . . . . . . . . . . . . . . . . 353
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 354
Uniform Tire Quality Grading . . . 354
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Wheel Replacement . . . . . . . . . . . . . . 356
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 356
If a Tire Goes Flat . . . . . . . . . . . . . . . . 357
Tire Changing . . . . . . . . . . . . . . . . . . . . . 358
Compact Spare Tire . . . . . . . . . . . . . . 364
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . . . 364

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
VEHICLE CARE 327
Caution
Do not apply tape or hang any
objects from gas struts. Also do not
push down or pull on gas struts.
This may cause damage to the
vehicle.
See Maintenance Schedule 0380.
Hood
Trunk
Liftgate
Headlamp Aiming
Front Headlamp Aiming
Headlamp aim has been preset and
should need no further adjustment.
If the vehicle is damaged in a crash,
the headlamp aim may be affected.
If adjustment to the headlamps is
necessary, see your dealer.
Bulb Replacement
LED Lighting
This vehicle has all LED lamps. For
replacement of any LED lighting
assembly, contact your dealer.
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

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
328 VEHICLE CARE
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
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
0 305 and
General Information 0304.
To check a fuse, look at the
silver-colored band inside the fuse.
If the band is broken or melted,
replace the fuse. Be sure to replace a
bad fuse with a new one of the
identical size and rating.
Fuses of the same amperage can be
temporarily borrowed from another
fuse location, if a fuse goes out.
Replace the fuse as soon as possible.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
330 VEHICLE CARE
FusesUsage
F1 Antilock Brake System Fuses
Usage
F2 Starter 1
F3 DC DC Transformer 1 Fuses
Usage
F4 –
F5 DC DC Transformer 2
F6 Amplifier 1
F7 Front Blower
F8 Starter 3
F9 –
F10 –
F11 –
F12 Front Wiper
F13 Starter 2
F14 –
F15 Rear Wiper 1
F16 –
F17 –
F18 Automatic Headlamp Leveling Module
F19 –
F20 –
F21 –

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
VEHICLE CARE 331
FusesUsage
F22 Electronic Brake Control Module
F23 Parking/Trailer Lamps
F24 Right Trailer Stoplamp/Turnlamp
F25 Steering Column Lock
F26 –
F27 Left Trailer Stoplamp/ Turnlamp
F28 –
F29 –
F30 Washer Pump
F31 –
F32 Headlamp Left
F33 –
F34 Horn
F35 –
F36 –
F37 Headlamp Right
F38 Not Used/Spare Fuses
Usage
F39 Transmission Control Module 1
F40 Left Rear Bus Electrical Center/DC
DC Ignition
F41 Instrument Cluster
F42 Heating, Ventilation, and Air Conditioning/
Central Gateway
Module/Run/Crank
F43 Head-up Display/ Reflective Light
Auxiliary
F44 Electronic Brake Control Module
Electric Brake
Booster/Run/Crank
F45 –
F46 –
F47 –
F48 Rear Wiper 2 Fuses
Usage
F49 Interior Rearview Mirror/Trailer/Rear
Heated Seats/Run/
Crank
F50 Fuel Tank Zone Module/Run/Crank
F51 Heated Steering Wheel
F52 Folding Seats Switch
F53 Engine Coolant Pump
F54 –
F55 Air Conditioning Clutch
F56 Not Used/Spare
F57 Engine Control Module/Ignition
F58 Transmission Control Module/Ignition
F59 Engine Control Module Battery
F60 –

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
356 VEHICLE CARE
loading, either separately or in
combination, can cause heat
buildup and possible tire failure.
Wheel Alignment and Tire
Balance
The tires and wheels were aligned and
balanced at the factory to provide the
longest tire life and best overall
performance. Adjustments to wheel
alignment and tire balancing are not
necessary on a regular basis. Consider
an alignment check if there is unusual
tire wear or the vehicle is significantly
pulling to one side or the other. Some
slight pull to the left or right,
depending on the crown of the road
and/or other road surface variations
such as troughs or ruts, is normal.
If the vehicle is vibrating when driving
on a smooth road, the tires and
wheels may need to be rebalanced.
See your dealer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent,
cracked, or badly rusted or corroded.
If wheel nuts keep coming loose, the
wheel, wheel bolts, and wheel nutsshould be replaced. If the wheel leaks
air, replace it. Some aluminum wheels
can be repaired. See your dealer if any
of these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the same
load-carrying capacity, diameter,
width, offset, and be mounted the
same way as the one it replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor System
(TPMS) sensors with new GM original
equipment parts.
{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel nuts
can be dangerous. It could affect
the braking and handling of the
vehicle. Tires can lose air and cause
loss of control, resulting in a crash.
Always use the correct wheel, wheel
bolts, and wheel nuts for
replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or odometer
calibration, headlamp aim, bumper
height, vehicle ground clearance,
and tire or tire chain clearance to
the body and chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used one
is dangerous. How it has been used
or how far it has been driven may
be unknown. It could fail suddenly
and cause a crash. When replacing
wheels, use a new GM original
equipment wheel.
Tire Chains
{Warning
If the vehicle has 265/45R21 size
tires, do not use tire chains. There
is not enough clearance. Tire chains
(Continued)

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
SERVICE AND MAINTENANCE 387
.Trained dealer technicians have the
diagnostic equipment to test the
battery and ensure that the
connections and cables are
corrosion-free.
Belts
.Belts may need replacing if they
squeak or show signs of cracking or
splitting.
.Trained dealer technicians have
access to tools and equipment to
inspect the belts and recommend
adjustment or replacement when
necessary.
Brakes
Brakes stop the vehicle and are crucial
to safe driving.
.Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping.
.Trained dealer technicians have
access to tools and equipment to
inspect the brakes and recommend
quality parts engineered for the
vehicle. Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. See
Recommended Fluids
and Lubricants 0389 for GM approved
fluids.
.Engine oil and windshield washer
fluid levels should be checked at
every fuel fill.
.Instrument cluster lights may come
on to indicate that fluids may be
low and need to be filled.
Hoses
Hoses transport fluids and should be
regularly inspected to ensure that
there are no cracks or leaks. With a
multi-point inspection, your dealer
can inspect the hoses and advise if
replacement is needed.
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage. The brake lamps need to be checked
periodically to ensure that they light
when braking.
.With a multi-point inspection, your
dealer can check the lamps and
note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
.Signs of wear may include steering
wheel vibration, bounce/sway while
braking, longer stopping distance,
or uneven tire wear.
.As part of the multi-point
inspection, trained dealer
technicians can visually inspect the
shocks and struts for signs of
leaking, blown seals, or damage, and
can advise when service is needed.
Tires
Tires need to be properly inflated,
rotated, and balanced. Maintaining
the tires can save money and fuel, and
can reduce the risk of tire failure.
.Signs that the tires need to be
replaced include three or more
visible treadwear indicators; cord or
fabric showing through the rubber;

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/9/21
INDEX 419
Antilock Brake System (ABS) . . . . . . 246Warning Light . . . . . . . . . . . . . . . . . . . . 118
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . . . . . 186
Assistance Systems for Driving . . . . 272
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 264
Audio
Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Auto Stop Stop/Start System . . . . . . . . . . . . . . . . 234
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . . . 32
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . 18
Emergency Braking (AEB) . . . . . . . . 275
Headlamp System . . . . . . . . . . . . . . . . 141
Transmission . . . . . . . . . . . . . . . . . . . . . . 240
Transmission Fluid . . . . . . . . . . . . . . . 314
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . 244
Avoiding Untrusted Media Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157B
Battery
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Power Protection . . . . . . . . . . . . . . . . . . 145
Battery - North America . . . . . .323, 364
Blade Replacement, Wiper . . . . . . . . . 325
Bluetooth Overview . . . . . . . . . . . . . . . . . . . . 181, 182
Bluetooth Audio . . . . . . . . . . . . . . . . . . . . 160
Brake
Electric Boost . . . . . . . . . . . . . . . . . . . . . 246
Parking, Electric . . . . . . . . . . . . . . . . . . 246
System Warning Light . . . . . . . . . . . . 117
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Automatic Emergency (AEB) . . . . . 275
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 276
Break-In, New Vehicle . . . . . . . . . . . . . . 232
Bulb Replacement Headlamp Aiming . . . . . . . . . . . . . . . . 327
Buying New Tires . . . . . . . . . . . . . . . . . . . 353
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 105
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 305
California Proposition 65 Warning . . . . . . . . . . . . .304, 323, 364, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 1
Capacities and Specifications . . . . . . 394
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . 239
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Winter Driving . . . . . . . . . . . . . . . . . . . . 226
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Management System . . . . . . . . . . . . . . 97
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Caution, Danger, and Warning . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . . 93
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 356
Charging
Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Charging System Light . . . . . . . . . . . . . 115
Check
Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 115