2023 CADILLAC XT6 check engine

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
392 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 0363 and
General Information 0363.
To check or replace a blown
fuse, see Electrical System
Overload 0390.
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 XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
444 Vehicle Care
of debris, snow and ice. If the
check engine light is activated,
please check to see if the
shutter system is clear of
debris, snow or ice.
Windshield and Wiper
Blades
Clean the outside of the
windshield with glass cleaner.
Clean rubber blades using a
lint-free cloth or paper towel
soaked with windshield
washer fluid or a mild
detergent. Wash the
windshield thoroughly when
cleaning the blades. Bugs,
road grime, sap, and a buildup
of vehicle wash/wax
treatments may cause wiper
streaking.
Replace the wiper blades if
they are worn or damaged.
Damage can be caused by
extreme dusty conditions,
sand, salt, heat, sun, snow,
and ice.
Weatherstrips
Apply weatherstrip lubricant
on weatherstrips to make
them last longer, seal better,
and not stick or squeak.
Lubricate weatherstrips at
least once a year. Hot, dry
climates may require more
frequent application. Black
marks from rubber material on
painted surfaces can be
removed by rubbing with a
clean cloth. See
Recommended Fluids and
Lubricants0458.
Tires
Use a stiff brush with tire
cleaner to clean the tires.
Caution
Using petroleum-based tire
dressing products on the
vehicle may damage the
paint finish and/or tires.
When applying a tire
dressing, always wipe off
(Continued)
Caution (Continued)
any overspray from all
painted surfaces on the
vehicle.
Wheels and Wheel Trim
Use a soft, clean cloth with
mild soap and water to clean
the wheels. After rinsing
thoroughly with clean water,
dry with a soft, clean towel.
A wax may then be applied.
Caution
Chrome wheels and chrome
wheel trim may be damaged
if the vehicle is not washed
after driving on roads that
have been sprayed with
magnesium chloride or
calcium chloride. These are
used on roads for conditions
such as dust and ice. Always
wash the chrome with soap
and water after exposure.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Service and Maintenance 453
Caution (Continued)
on the vehicle. The use of
flushes, solvents, cleaners,
or lubricants that are not
approved by GM could
damage the vehicle,
requiring expensive repairs
that are not covered by the
vehicle warranty.
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 Limits 0252.
.Are driven on reasonable
road surfaces within legal
driving limits.
.Use the recommended fuel.
See Recommended Fuel
(2.0L L4 Turbo Engine)
0343 or Recommended Fuel
(3.6L V6 Engine) 0343.
Refer to the information in the
Maintenance Schedule
Additional Required Services -
Normal Service.
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 Service.
{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 0364.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
454 Service and Maintenance
Maintenance
Schedule
Tire Rotation and
Required Services Every
12 000 km (7,500 mi)
Tires are rotated to achieve a
more uniform wear for all tires.
The first rotation is the most
important.
Anytime unusual wear is
noticed, rotate the tires as
soon as possible, check for
proper tire inflation pressure,
and check for damaged tires
or wheels. If the unusual wear
continues after the rotation,
check the wheel alignment.
See When It Is Time for New
Tires0418 and Wheel
Replacement 0423.
.Perform Multi-Point Vehicle
Inspection. See Multi-Point
Vehicle Inspection (MPVI)
0456.
.Lubricate body components.
See Exterior Care 0440.
Additional Required
Services —Normal
Service
Every 12 000 km (7,500 mi)
.Check engine oil level and oil
life percentage. If needed,
change engine oil and filter,
and reset oil life system. Or
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 is reset accidentally,
service the vehicle within
5 000 km (3,000 mi) since
the last service. Reset the oil life system when the oil is
changed. See Engine Oil Life
System
0373.
.When the REPLACE AT
NEXT OIL CHANGE
message displays, the engine
air filter should be replaced
at the next engine oil
change. When the REPLACE
ENGINE AIR FILTER SOON
message displays, the engine
air filter should be replaced
at the earliest convenience.
Reset the engine air filter life
system after the engine air
filter is replaced. See Engine
Air Filter Life System 0374.
Every 36 000 km (22,500 mi)
.Passenger compartment air
filter replacement (or every
24 months, whichever
occurs first). More frequent
replacement may be needed
if the vehicle is driven in
areas with heavy traffic,
poor air quality, areas with
high dust levels or are
sensitive to environmental
allergens. Filter replacement

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Service and Maintenance 457
Diagnostics
.OnStar active, if equipped
.Service history/recall check
Engine Oil and Filter
.Engine oil
.Oil life monitor
‐Reset oil life monitor
Exterior Lights
.Visual inspection
Windshield and Wipers
.Visual inspection
Battery
.Battery visual inspection
.Battery test results
.Battery cables and
connections
Systems, Fluids, and
Visible Leak Inspection
.Engine oil
.Transmission
.Drive axle
.Transfer case
.Engine cooling system
.Power steering, if equipped
.Fuel system
.Windshield washer fluid
Tire Inspection
.Tire pressure, tread depth,
and wear
.Rotation, if applicable
.Alignment check, optional
.Reset tire pressure monitor
.Check tire sealant expiration
date, if equipped
.Check spare tire, if equipped
Brakes
.Check brake system
Visible and Functional
Inspections
.Seat belt components
.Exhaust system
.Accelerator pedal
.Passenger compartment air
filter, if equipped
.Engine air filter
.Hoses
.Belts
.Shocks and struts
.Steering components
.Axle boots or driveshaft and
u-joints
.Compartment lift struts,
if equipped
.Floor mats secured, no
interference with pedals
.Horn
.Ignition lock, if equipped
.Starter switch
.Evaporative control system
Lubricate
.Chassis components
Special Application
Services
.Severe Commercial Use
Vehicles Only: Lubricate
chassis components every
oil change.
.Have underbody flushing
service performed. See
"Underbody Maintenance" in
Exterior Care 0440.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
464 Technical Data
ApplicationCapacities
Metric English
Fuel Tank
IFront-Wheel Drive 73.4 L
19.4 gal
IAll-Wheel Drive 82.1 L
21.7 gal
Wheel Nut Torque 190Y 140 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as
recommended in this manual. Recheck fluid level after filling.
*Engine cooling system capacity values are based on the entire cooling system and its
components.
Engine Specifications
Engine VIN CodeTransmission Spark Plug Gap
2.0L L4 Engine (LSY) 4Automatic 0.65–0.75 mm (0.026–
0.030 in)
3.6L V6 Engine (LGX) SAutomatic 0.80–0.90 mm (0.031–
0.035 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended
and can damage the spark plug.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
492 INDEX
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . 363
Accessory Power . . . . . . . . . . . 263
Active Fuel Management . . . . . . . . . 264
Adaptive Cruise Control . . . . . . . . . . . . . . 283
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . . 360
Additional OnStar Information . . . . . . . 484
Adjustments Lumbar, Front Seats . . . . . . . 50
Agreements Trademarks andLicense . . . . . . . . . . . . . . . . . . . . . . 219
Air Cleaner/Filter, Engine . . . . 375
Conditioning . . . . . . . . . . 228, 234
Filter Life System . . . . . . . . . 374
Filter, Passenger
Compartment . . . . . . . . . . . . . . 237
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Airbag System . . . . . . . . . . . . . . . . . . 71 Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . . . 76 Airbag System (cont'd)
Passenger Sensing
System . . . . . . . . . . . . . . . . . . . . . . . . 78
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 76
What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . 76
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 75
Where Are the Airbags? . . . . . . . . . . . . . . . . . . . . . . 73
Airbags Adding Equipment tothe Vehicle . . . . . . . . . . . . . . . . . . . 83
Passenger Status
Indicator . . . . . . . . . . . . . . . . . . . . . 133
Readiness Light . . . . . . . . . . . . . 132
Replacing System Parts after a Crash . . . . . . . 84
Servicing
Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . 82
Alarm Vehicle Security . . . . . . . . . . . . . 33
Alert
Lane Change . . . . . . . . . . . . . . . 336
Rear Cross Traffic . . . . . . . . 325

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
494 INDEX
Capacities andSpecifications . . . . . . . . . . . . . . . 463
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . 265
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . 25
Winter Driving . . . . . . . . . . . . . . 250
Cargo
Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Management System . . . . . 113
Tie-Downs . . . . . . . . . . . . . . . . . . . . 113
Caution, Danger, and
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . . . . . . . . . . . 109
Chains, Tire . . . . . . . . . . . . . . . . . . . 424
Charging System Light . . . . . . . . . . . . . . . . 134
Wireless . . . . . . . . . . . . . . . . . . . . . . . 123
Check Engine Light (Malfunction Indicator) . . . . 134
Child Restraints
Infants and YoungChildren . . . . . . . . . . . . . . . . . . . . . . . 86
Lower Anchors and Tethers for Children . . . . . . 92
Older Children . . . . . . . . . . . . . . . . 85
Securing . . . . . . . . . . . . . . . 102, 104
Systems . . . . . . . . . . . . . . . . . . . . . . . . 89 Child Safety Locks . . . . . . . . . . . . 24
Circuit Breakers . . . . . . . . . . . . . . 391
Cleaning
Exterior Care . . . . . . . . . . . . . . . 440
Interior Care . . . . . . . . . . . . . . . . 446
Climate Control Systems Dual Automatic . . . . . . . . . . . . . 228
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Cluster, Instrument . . . . . . . . . . 127
Collision Damage Repair . . . . . . . . . . . . . . . . . . . . . . . . . 474
Compact Spare Tire . . . . . . . . 433
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . 108
Compass . . . . . . . . . . . . . . . . . . . . . . . . 122
Connected Services
Connections . . . . . . . . . . . . . . . . 490
Diagnostics . . . . . . . . . . . . . . . . . . . 491
Navigation . . . . . . . . . . . . . . . . . . . 489
Connections
Connected Services . . . . . . 490
Control Traction andElectronic Stability . . . . . . . 276
Control of a Vehicle . . . . . . . . . 241
Controls Steering Wheel . . . . . . . . . . . . . 167 Convenience Net . . . . . . . . . . . . . .114
Convex Mirrors . . . . . . . . . . . . . . . . 37
Coolant
Engine TemperatureGauge . . . . . . . . . . . . . . . . . . . . . . . . 131
Cooling . . . . . . . . . . . . . . . . . . .228, 234
Cooling System . . . . . . . . . . . . . . 376
Cornering Lamps . . . . . . . . . . . . . .161
Courtesy Lamps . . . . . . . . . . . . . . .161
Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . 473
Cover Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Coverage Explanations . . . . . 194
Cruise Control . . . . . . . . . . . . . . . . 280 Adaptive . . . . . . . . . . . . . . . . . . . . . 283
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Super . . . . . . . . . . . . . . . . . . . . . . . . . 294
Cupholders . . . . . . . . . . . . . . . . . . . . . 108
Customer Assistance Offices . . . . . . . . . . . . . . . . . . . . . . . . 468
Text Telephone (TTY)Users . . . . . . . . . . . . . . . . . . . . . . . . 469
Customer Information
Publications OrderingInformation . . . . . . . . . . . . . . . . 476