2023 CADILLAC XT6 cooling

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Service and Maintenance 455
may also be needed if you
notice reduced airflow,
windows fogging up,
or odors. Your local GM
Service location can help you
determine when it is the
right time to replace your
filter.
Every 96 000 km (60,000 mi)
.Replace spark plugs. Inspect
spark plug wires and/or
boots. (2.0L Engine)
Every 156 000 km
(97,500 mi)
.Replace spark plugs. Inspect
spark plug wires and/or
boots. (3.6L Engine)
Every 161 000 km
(100,000 mi)
.Replace hood and/or body
lift support gas struts. Or
every 10 years, whichever
comes first. See Gas Strut(s)
0 388. Every 240 000 km
(150,000 mi)
.Change rear axle fluid,
if equipped with AWD. Do
not directly power wash the
transfer case and/or front/
rear axle output seals. High
pressure water can
overcome the seals and
contaminate the transfer
case fluid. Contaminated
fluid will decrease the life of
the transfer case and/or
axles and should be
replaced.
.Drain and fill engine cooling
system. Or every six years,
whichever comes first. See
Cooling System
0376.
Severe Conditions
Requiring More Frequent
Maintenance*
.Public service, military,
or commercial use vehicles
to include the following:
‐ Ambulances, police cars,
and emergency rescue
vehicles. ‐
Civilian vehicles such as
light duty pick-up trucks,
SUVs, and passenger cars
that are used in military
applications.
‐ Recovery vehicles such as
tow trucks and flatbed
single vehicle carriers or
any vehicle that is
consistently used in towing
trailers or other loads.
‐ High use commercial
vehicles such as courier
delivery vehicles, private
security patrol vehicles,
or any vehicles that
operate on a 24–hour
basis.
‐ Any vehicle consistently
operated in a high sand or
dust environment such as
those used on oil pipelines
and similar applications..Vehicles that are regularly
used for short trips of 6 km
(4 mi) or less.
The oil life indicator will show
you when to change the oil
and filter. Under severe

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
458 Service and Maintenance
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name or specification, including fluids or lubricants not
listed here, can be obtained from your dealer.Usage Fluid/Lubricant
Automatic Transmission DEXRON-VI Automatic Transmission Fluid. Chassis Lubrication Lubricant meeting requirements of NLGI #2, Category LB or GC-LB. See your dealer.
Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System 0376.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended.
See Engine Oil0370.
Fuel Additive Fuel System Treatment PLUS or equivalent.
Hood and Door Hinges, Key Lock Cylinders Multi-Purpose Lubricant. See your dealer.
Hydraulic Brake System DOT 4 Hydraulic Brake Fluid.
Power Liftgate Actuator Ball Joint, Hood Latch Assembly,
Secondary Latch, Pivots, Spring Anchor, and Release Pawl Lubricant meeting requirements of NLGI #2, Category LB or
GC-LB. See your dealer.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
Technical Data 463
Vehicle Data
Capacities and Specifications
The following approximate capacities are given in metric and English conversions. See
Recommended Fluids and Lubricants0458 for more information.
Application Capacities
Metric English
Air Conditioning Refrigerant For the air conditioning system refrigerant type and charge amount, see the
refrigerant label under the hood. See your dealer for more information.
Engine Cooling System*
I2.0L L4 Engine 10.6 L 11.2 qt
I3.6L V6 Engine 12.9 L 13.6 qt
Engine Oil with Filter I2.0L L4 Engine 5.0 L 5.3 qt
I3.6L V6 Engine 5.7 L 6.0 qt

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
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

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
2023 - CRC - 3/22/22
496 INDEX
EmergencyOnStar . . . . . . . . . . . . . . . . . . . . . . . . 483
Engine Air Cleaner/Filter . . . . . . . . . . 375
Air Filter Life System . . . . . 374
Check Light(Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 134
Compartment Overview . . . . . . . . . . . . . . . . . . . 367
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 131
Cooling System . . . . . . . . . . . . 376
Drive Belt Routing . . . . . . . . . 465
Exhaust . . . . . . . . . . . . . . . . . . . . . . 265
Heater . . . . . . . . . . . . . . . . . . . . . . . . . 261
Oil Life System . . . . . . . . . . . . . 373
Oil Pressure Light . . . . . . . . . . 142
Overheating . . . . . . . . . . . . . . . . . . 381
Power Messages . . . . . . . . . . . 151
Running While Parked . . . 266
Starting . . . . . . . . . . . . . . . . . . . . . . 258
Entry Lighting . . . . . . . . . . . . . . . . . 162
Equipment, Towing . . . . . . . . . 356
Event Data Recorders . . . . . 480
Exit Lighting . . . . . . . . . . . . . . . . . . . 163
Extended Parking . . . . . . . . . . . 265
Extender, Seat Belt . . . . . . . . . . . 70 Exterior
Lamp Controls . . . . . . . . . . . . . . 156
Lamps Off Reminder . . . . . . 158
Lighting Battery Saver . . . 163
F
Filter
Engine Air Cleaner . . . . . . . . 375
Flash-to-Pass . . . . . . . . . . . . . . . . . . 158
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . 160
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 425
Changing . . . . . . . . . . . . . . . . . . . . . 426
Floor Mats . . . . . . . . . . . . . . . . . . . . . 450
Fluid AutomaticTransmission . . . . . . . . . . . . . . 374
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 384
Washer . . . . . . . . . . . . . . . . . . . . . . . 382
Folding Mirrors . . . . . . . . . . . . . . . . . 37
Forward Collision Alert (FCA)System . . . . . . . . . . . . . . . . . . . . . . 326
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . 477
Front
Heated and VentilatedSeats . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Front (cont'd)
Pedestrian Braking
(FPB) System . . . . . . . . . . . . . 330
Fuel Additives . . . . . . . . . . . . . . . . . . . . . 344
Economy, Driving forBetter . . . . . . . . . . . . . . . . . . . . . . . 239
Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . 346
Filling the Tank . . . . . . . . . . . . . 344
Foreign Countries . . . . . . . . . 344
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Management, Active . . . . . . 264
Prohibited Fuels . . . . . . . . . . . 344
Recommended . . . . . . . . . . . . . 343
Top Tier . . . . . . . . . . . . . . . . . . . . . . 342
Fuses Engine CompartmentFuse Block . . . . . . . . . . . . . . . . . 392
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 391
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . 396
Rear Compartment
Fuse Block . . . . . . . . . . . . . . . . . 398