coolant CADILLAC CT4 2021 Owner's Guide

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
344 VEHICLE CARE
to carry. The speed rating is the
maximum speed a tire is certified
to carry a load.
Tire Terminology and
Definitions
Air Pressure:The amount of air
inside the tire pressing outward
on each square inch of the tire.
Air pressure is expressed in kPa
(kilopascal) or psi (pounds per
square inch).
Accessory Weight
:The combined
weight of optional accessories.
Some examples of optional
accessories are automatic
transmission, power windows,
power seats, and air conditioning.
Aspect Ratio
:The relationship of
a tire's height to its width.
Belt
:A rubber coated layer of
cords between the plies and the
tread. Cords may be made from
steel or other reinforcing
materials. Bead
:The tire bead contains steel
wires wrapped by steel cords that
hold the tire onto the rim.
Bias Ply Tire
:A pneumatic tire in
which the plies are laid at
alternate angles less than
90 degrees to the centerline of the
tread.
Cold Tire Pressure
:The amount
of air pressure in a tire, measured
in kPa (kilopascal) or psi (pounds
per square inch) before a tire has
built up heat from driving. See
Tire Pressure 0346.
Curb Weight
:The weight of a
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil, and
coolant, but without passengers
and cargo.
DOT Markings
:A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) Motor Vehicle Safety Standards. The DOT code includes
the Tire Identification Number
(TIN), an alphanumeric designator
which can also identify the tire
manufacturer, production plant,
brand, and date of production.
GVWR
:Gross Vehicle Weight
Rating. See Vehicle Load Limits
0 214.
GAWR FRT
:Gross Axle Weight
Rating for the front axle. See
Vehicle Load Limits 0214.
GAWR RR
:Gross Axle Weight
Rating for the rear axle. See
Vehicle Load Limits 0214.
Intended Outboard Sidewall
:
The side of an asymmetrical tire
that must always face outward
when mounted on a vehicle.
Kilopascal (kPa)
:The metric unit
for air pressure.
Light Truck (LT-Metric) Tire
:A
tire used on light duty trucks and
some multipurpose passenger
vehicles.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
SERVICE AND MAINTENANCE 381
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 System0314.
Air Conditioning Desiccant
(Replace Every Seven Years)
The air conditioning system requires
maintenance every seven years. This
service requires replacement of the
desiccant to help the longevity and
efficient operation of the air
conditioning system. This service can
be complex. See your dealer.
Tire Rotation and Required
Services Every 12 000 km
(7,500 mi)
Rotate the tires, if recommended for
the vehicle, and perform the following
services. See Tire Rotation0352.
.Check engine oil level and oil
life percentage. If needed, change
engine oil and filter, and reset oil
life system. See Engine Oil0312 and
Engine Oil Life System 0314.
.If equipped, check the air filter
life percentage. If necessary, replace
the engine air filter and reset the
engine air filter life system. See
Engine Air Filter Life System 0315.
If the vehicle is not equipped with
the engine air filter life system,
inspect the engine air cleaner filter.
See Engine Air Cleaner/Filter 0316.
.Check engine coolant level. See
Cooling System 0317.
.Check windshield washer fluid level.
See Washer Fluid 0323.
.Check tire inflation pressures. See
Tire Pressure 0346.
.Inspect tire wear. See Tire Inspection
0 352.
.Visually check for fluid leaks.
.Inspect brake system. See Exterior
Care 0370.
.Visually inspect steering,
suspension, and chassis
components for damage, including
cracks or tears in the rubber boots,
loose or missing parts, or signs of
wear at least once a year. See
Exterior Care 0370.
.Inspect power steering for proper
attachment, connections, binding,
leaks, cracks, chafing, etc.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
SERVICE AND MAINTENANCE 391
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 (8-Speed Transmission) DEXRON-HP Automatic Transmission Fluid.
Automatic Transmission (10-Speed Transmission) DEXRON ULV Automatic Transmission Fluid.
Chassis Lubrication Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB. Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System0317.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil0312.
Hood Latch Assembly, Secondary Latch,
Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol or lubricant meeting requirements of NLGI #2,
Category LB or GC-LB.
Hydraulic Brake System DOT 4 Hydraulic Brake Fluid.
Key Lock Cylinders, Hood and Door Hinges Multi-Purpose Lubricant, Superlube. See your dealer.
Rear Axle/Front Axle (All-Wheel Drive) See your dealer. Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INDEX 423
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 358
ChargingWireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Charging System Light . . . . . . . . . . . . . . 97
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . . 97
Child Restraints Infants and Young Children . . . . . . . 60
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . . . . . 65
Older Children . . . . . . . . . . . . . . . . . . . . . 59
Securing . . . . . . . . . . . . . . . . . . . . . . . . 72, 74
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 331
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . 370
Interior Care . . . . . . . . . . . . . . . . . . . . . . 375
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . . . . . 196
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Cluster, Instrument . . . . . . . . . . . . . . 88, 90
Collision Damage Repair . . . . . . . . . . . 406
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Competitive Driving Mode . . . . . . . . . 246
Composite Materials . . . . . . . . . . . . . . . . 218 Compressor Kit, Tire Sealant . . . . . . . 360
Connected Services
Connections . . . . . . . . . . . . . . . . . . . . . . . 419
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 420
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . 418
Connections Connected Services . . . . . . . . . . . . . . . 419
Control Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Control of a Vehicle . . . . . . . . . . . . . . . . 204
Controls
Steering Wheel . . . . . . . . . . . . . . . . . . . . 137
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 23
Coolant Engine Temperature Gauge . . . 94, 95
Engine Temperature Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Cooling System . . . . . . . . . . . . . . . . . . . . . 317
Cornering Lamps . . . . . . . . . . . . . . . . . . . 130
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 130
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
Coverage Explanations . . . . . . . . . . . . . 163
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 248
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Cruise Control, Adaptive . . . . . . . . . . . 251 Cruise Control, Super . . . . . . . . . . . . . . . 260
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Customer Assistance . . . . . . . . . . . . . . . 402
Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
Text Telephone (TTY) Users . . . . . 402
Customer Information Publications Ordering
Information . . . . . . . . . . . . . . . . . . . . . . 408
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 399
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . 410
D
Damage Repair, Collision . . . . . . . . . . . 406
Danger, Warning, and Caution . . . . . . . . 2
Data Collection Infotainment System . . . . . . . . . . . . . 412
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
Data Recorders, Event . . . . . . . . . . . . . . 411
Database Coverage Explanations . . . . . . . . . . . . . . . . . . . . . . 163
Daytime Running Lamps (DRL) . . . 128
Defensive Driving . . . . . . . . . . . . . . . . . . . 204
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 17
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Diagnostics Connected Services . . . . . . . . . . . . . . . 420
Differential, Limited-Slip . . . . . . . . . . . 248

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
424 INDEX
Distracted Driving . . . . . . . . . . . . . . . . . . 203
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 130
DoorAjar Light . . . . . . . . . . . . . . . . . . . . . . . . . 107
Delayed Locking . . . . . . . . . . . . . . . . . . . 17
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . 17
Drive Belt Routing, Engine . . . . . . . . . 398
Drive Systems All-Wheel Drive . . . . . . . . . . . . . 236, 327
Driver
Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Driver Assistance Systems . . . . . . . . . 275
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . .107, 110
Driver Mode Control . . . . . . . . . . . . . . . . 241
Driver Mode Control Light . . . . . . . . . 103
Driving
Assistance Systems . . . . . . . . . . . . . . . 283
Better Fuel Economy . . . . . . . . . . . . . 203
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 297
Competitive . . . . . . . . . . . . . . . . . . . . . . . 246
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Hill and Mountain Roads . . . . . . . . 212
If the Vehicle is Stuck . . . . . . . . . . . . 214
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Loss of Control . . . . . . . . . . . . . . . . . . . . 206 Driving (cont'd)
Off-Road Recovery . . . . . . . . . . . . . . . . 206
Track Events and
Competitive . . . . . . . . . . . . . . . . . . . . . . 207
Vehicle Load Limits . . . . . . . . . . . . . . 214
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 211
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . 196
E
Electric Brake Boost . . . . . . . . . . . . . . . . 236
Electric Parking Brake . . . . . . . . . . . . . . 237
Electric Parking Brake Light . . . . . . . 100
Electrical Equipment, Add-On . . . . . 303
Electrical SystemEngine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . 331
Instrument Panel Fuse Block . . . . 334
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414
Engine
Air Cleaner/Filter . . . . . . . . . . . . . . . . . 316 Engine (cont'd)
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . 97
Compartment Overview . . . . . . . . . . 309
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 94, 95
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 103
Cooling System . . . . . . . . . . . . . . . . . . . 317
Drive Belt Routing . . . . . . . . . . . . . . . . 398
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Oil Life System . . . . . . . . . . . . . . . . . . . . 314
Oil Pressure Light . . . . . . . . . . . . . . . . . 104
Overheating . . . . . . . . . . . . . . . . . . . . . . . 322
Power Messages . . . . . . . . . . . . . . . . . . 117
Running While Parked . . . . . . . . . . . 227
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Engine Air Filter Life System . . . . . . 315
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 131
Equipment, Towing . . . . . . . . . . . . . . . . . 302
Event Data Recorders . . . . . . . . . . . . . . 411
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 132
Extended Parking . . . . . . . . . . . . . . . . . . . 226
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 46
Exterior Lamp Controls . . . . . . . . . . . . 126
Exterior Lamps Off Reminder . . . . . . 128
Exterior Lighting Battery Saver . . . . 133

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INDEX 425
F
Filter,Engine Air Cleaner . . . . . . . . . . . . . . . . 316
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 128
Flashers, Hazard Warning . . . . . . . . . . 129
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 377
Fluid Automatic Transmission . . . . . . . . . 315
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 24
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Front Seats
Heated and Ventilated . . . . . . . . . . . . 37
Front Turn Signal Lamps . . . . . . . . . . 330
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Economy, Driving for Better . . . . . 203
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 296
Filling the Tank . . . . . . . . . . . . . . . . . . . 295
Foreign Countries . . . . . . . . . . . . . . . . . 294 Fuel (cont'd)
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Low Fuel Warning Light . . . . . . . . . 105
Prohibited Fuels . . . . . . . . . . . . . . . . . . 294
Recommended . . . . . . . . . . . . . . 293, 294
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Fuses
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . 331
Instrument Panel Fuse Block . . . . 334
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
G
Garage Door Opener . . . . . . . . . . . . . . . . 122Programming . . . . . . . . . . . . . . . . . . . . . . 122
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 328
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . . . . 94, 95
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Speedometer . . . . . . . . . . . . . . . . . . . . . . . 93
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . 93
Trip Odometer . . . . . . . . . . . . . . . . . . . . . 93
Warning Lights and Indicators . . . 87 General Information
Service and Maintenance . . . . . . . . 379
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 305
Global Positioning System (GPS) . . . . . . . . . . . . . . . . . . . . . . 161
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402
Guidance Problems with the Route . . . . . . . . . 162
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . 330
Hazard Warning Flashers . . . . . . . . . . 129
HD Radio Technology . . . . . . . . . . . . . . 143
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 31
Head-up Display . . . . . . . . . . . . . . . . . . . . 112
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 128
Bulb Replacement . . . . . . . . . . . . . . . . 329
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 128
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 128
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . 330
High-Beam On Light . . . . . . . . . . . . . . 105

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INDEX 427
Lights (cont'd)Charging System . . . . . . . . . . . . . . . . . . . 97
Check Engine (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . 97
Cruise Control . . . . . . . . . . . . . . . . . . . . . 106
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Driver Mode Control . . . . . . . . . . . . . . 103
Electric Parking Brake . . . . . . . . . . . . 100
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 103
Engine Oil Pressure . . . . . . . . . . . . . . . 104
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 128
High-Beam On . . . . . . . . . . . . . . . . . . . . 105
High/Low Beam Changer . . . . . . . . . 128
Lane Keep Assist . . . . . . . . . . . . . . . . . . 101
Low Fuel Warning . . . . . . . . . . . . . . . . 105
Seat Belt Reminders . . . . . . . . . . . . . . . 95
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Service Electric Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 102
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 104
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . 103
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 102
Limited-Slip Differential . . . . . . . . . . . . 248 Locks
Automatic Door . . . . . . . . . . . . . . . . . . . . 17
Delayed Locking . . . . . . . . . . . . . . . . . . . 17
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Lockout Protection . . . . . . . . . . . . . . . . 18
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . 17
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 206
Low Fuel Warning Light . . . . . . . . . . . 105
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . 341
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . 65
Lumbar Adjustment . . . . . . . . . . . . . . . . . 32 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . 32
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . 388
Maintenance Schedule . . . . . . . . . . . . . 380
Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . 391
Malfunction Indicator Lamp . . . . . . . . 97
Manual Mode . . . . . . . . . . . . . . . . . .234, 235
Map Data Updates . . . . . . . . . . . . . . . . . . 163 Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Media
Avoiding Untrusted Devices . . . . . 145
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . 34
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . 117
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . 117
Mirrors Automatic Dimming . . . . . . . . . . . . . . . 25
Automatic Dimming Rearview . . . . 26
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Manual Rearview . . . . . . . . . . . . . . . . . . 26
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . 25
Mirrors, Interior Rearview . . . . . . . . . . . 26
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Driver Control . . . . . . . . . . . . . . . . . . . . . 241
Monitor System, Tire Pressure . . . . . 348
Multi-band Antenna . . . . . . . . . . . . . . . . 145