automatic transmission CADILLAC CT4 2021 Owner's Guide

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
382 SERVICE AND MAINTENANCE
.Visually inspect halfshafts and drive
shafts for excessive wear, lubricant
leaks, and/or damage including:
tube dents or cracks, constant
velocity joint or universal joint
looseness, cracked or missing boots,
loose or missing boot clamps, center
bearing excessive looseness, loose or
missing fasteners, and axle seal
leaks.
.Check restraint system components.
SeeSafety System Check 047.
.Visually inspect fuel system for
damage or leaks.
.Visually inspect exhaust system and
nearby heat shields for loose or
damaged parts.
.Lubricate body components. See
Exterior Care 0370.
.Check parking brake and automatic
transmission park mechanism. See
Park Brake and P (Park) Mechanism
Check 0327.
.Check accelerator pedal for damage,
high effort, or binding. Replace if
needed.
.Visually inspect gas strut for signs
of wear, cracks, or other damage.
Check the hold open ability of the
strut. If the hold open is low,
service the gas strut. See Gas
Strut(s) 0328.
.Inspect sunroof track and seal,
if equipped. See Sunroof028.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
386 SERVICE AND MAINTENANCE
Maintenance Schedule
Additional Required Services -
Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires, if recommended for the vehicle, and
perform Required Services. (1) Check engine oil level
and oil life percentage. Change engine oil and filter,
if needed.
If equipped, check engine air filter life percentage
and status. Change engine air filter, if needed.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
If the vehicle is not equipped with the engine air
filter life system, replace engine air cleaner filter. (3)@ @@
Inspect evaporative control system. (4)@@@
Replace spark plugs. Inspect spark plug wires and/or
boots.@ @
Change automatic transmission fluid and filter.@@@
Change transfer case fluid, if equipped with
AWD. (5)@@@
Change rear axle fluid, if equipped with limited slip
differential. (5)@@@

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
TECHNICAL DATA 397
ApplicationCapacities
Metric English
Rear Axle
IOpen Differential - Small 0.75 L
0.79 qt
IOpen Differential - Large 1.0 L
1.0 qt
IMechanical Limited Slip 1.0 L
1.0 qt
Wheel Nut Torque (M12) 140Y 100 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 Turbo Engine (LSY) KAutomatic0.65–0.75 mm (0.026–0.030 in)
2.7L L4 Turbo Engine (L3B) LAutomatic0.65–0.75 mm (0.026–0.030 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage the
spark plug.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
ONSTAR 417
Vehicle and Power Issues
OnStar services require a vehicle
electrical system, wireless service, and
GPS satellite technologies to be
available and operating for features to
function properly. These systems may
not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment
The OnStar system is integrated into
the electrical architecture of the
vehicle. Do not add any electrical
equipment. SeeAdd-On Electrical
Equipment 0303. Added electrical
equipment may interfere with the
operation of the OnStar system and
cause it to not operate.
Vehicle Software Updates
OnStar or GM may remotely deliver
software updates or changes to the
vehicle without further notice or
consent. These updates or changes
may enhance or maintain safety,
security, or the operation of the
vehicle or the vehicle systems.
Software updates or changes may
affect or erase data or settings that
are stored in the vehicle, such as saved navigation destinations or
pre-set radio stations. Neither OnStar
nor GM is responsible for any affected
or erased data or settings. These
updates or changes may also collect
personal information. Such collection
is described in the OnStar privacy
statement or separately disclosed at
the time of installation. These updates
or changes may also cause a system to
automatically communicate with GM
servers to collect information about
vehicle system status, identify
whether updates or changes are
available, or deliver updates or
changes. An active OnStar agreement
constitutes consent to these software
updates or changes and agreement
that either OnStar or GM may
remotely deliver them to the vehicle.Privacy
The complete OnStar Privacy
Statement may be found at
www.onstar.com (U.S.),
or www.onstar.ca (Canada). We
recommend that you review it. If you
have any questions, call
1-888-4ONSTAR (1-888-466-7827) or
press
Qto speak with an Advisor.
Users of wireless communications are
cautioned that the privacy of any
information sent via wireless cellular
communications cannot be assured.
Third parties may unlawfully intercept
or access transmissions and private
communications without consent.
OnStar - Software
Acknowledgements
To obtain the source code
under GPL, LGPL, MPL, and
other open source licenses, that is
contained in this product, please visit
http://opensource.lge.com. In addition
to the source code, all referred license
terms, warranty disclaimers, and
copyright notices are available for
download. This offer is valid for a
period of three years after our last
shipment of this product. This offer is
valid to anyone in receipt of this
information.
*Provided through LG Electronics Inc.,
who is solely responsible for
provisions of related OSS compliance.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
422 INDEX
Appearance CareExterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . . . . . 174
Assistance Systems for Driving . . . . 283
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 277
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Auto Stop
Stop/Start System . . . . . . . . . . . . . . . . 221
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . . . 25
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . 17
Emergency Braking (AEB) . . . . . . . . 285
Headlamp System . . . . . . . . . . . . . . . . 128
Transmission . . . . . . . . . . . . . . . . 227, 229
Transmission Fluid . . . . . . . . . . . . . . . 315
Vehicle Hold Light . . . . . . . . . . . . . . . . 101
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . 234, 235
Automatic Vehicle Hold (AVH) . . . . 239
Avoiding Untrusted Media Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145B
Battery
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Load Management . . . . . . . . . . . . . . . . 132
Power Protection . . . . . . . . . . . . . . . . . . 133
Battery - North America . . . . . .326, 366
Blade Replacement, Wiper . . . . . . . . . 327
Bluetooth Overview . . . . . . . . . . . . . . . . . . . . 169, 170
Bluetooth Audio . . . . . . . . . . . . . . . . . . . . 148
Brake Electric Boost . . . . . . . . . . . . . . . . . . . . . 236
Parking, Electric . . . . . . . . . . . . . . . . . . 237
System Warning Light . . . . . . . . . . . . . 99
Brake Pad Life System . . . . . . . . . . . . . . 324
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Pad Life System . . . . . . . . . . . . . . . . . . . 324
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 Automatic Emergency (AEB) . . . . . 285
Braking System
Front Pedestrian (FPB) . . . . . . . . . . . 287
Break-In, New Vehicle . . . . . . . . . . . . . . 218
Buckle To Drive . . . . . . . . . . . . . . . . . . . . . . 41 Bulb Replacement
Front Turn Signal Lamps . . . . . . . . 330
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . 330
Headlamp Aiming . . . . . . . . . . . . . . . . 329
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 329
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . . . . . . . 330
Buying New Tires . . . . . . . . . . . . . . . . . . . 354
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 306
California Proposition 65 Warning . . . . . . . . . . . . .305, 326, 366, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 1
Capacities and Specifications . . . . . . 396
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . 226
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Winter Driving . . . . . . . . . . . . . . . . . . . . 213
Cargo Management System . . . . . . . . . . . . . . 80
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Caution, Danger, and Warning . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . . 79

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 431
Thigh Support Adjustment . . . . . . . . . . 33
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339All-Season . . . . . . . . . . . . . . . . . . . . . . . . . 339
Buying New Tires . . . . . . . . . . . . . . . . . 354
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Designations . . . . . . . . . . . . . . . . . . . . . . 343
Different Size . . . . . . . . . . . . . . . . . . . . . . 356
If a Tire Goes Flat . . . . . . . . . . . . . . . . 359
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 352
Low Profile . . . . . . . . . . . . . . . . . . . . . . . . 341
Pressure . . . . . . . . . . . . . . . . . . . . . 346, 347
Pressure Light . . . . . . . . . . . . . . . . . . . . . 104
Pressure Monitor Operation . . . . . . 349
Pressure Monitor System . . . . . . . . 348
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Run-Flat . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Sealant and Compressor Kit . . . . . 360
Sealant and Compressor Kit,Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . 366
Self-Sealing . . . . . . . . . . . . . . . . . . . . . . . . 341
Sidewall Labeling . . . . . . . . . . . . . . . . . 342
Terminology and Definitions . . . . 344
Uniform Tire Quality Grading . . . . 356
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Wheel Replacement . . . . . . . . . . . . . . 357 Tires (cont'd)
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . 293
Towing Driving Characteristics . . . . . . . . . . . 297
Equipment . . . . . . . . . . . . . . . . . . . . . . . . 302
General Information . . . . . . . . . . . . . . 297
Recreational Vehicle . . . . . . . . . . . . . . 370
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Track Events and Competitive Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Traction Control System
(TCS)/StabiliTrak Light . . . . . . . . . 103
Limited-Slip Differential . . . . . . . . . . 248
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . . 239
Trademarks and License Agreements . . . . . . . . . . . . . . . . . . . . . . . . 187
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 Transmission
Automatic . . . . . . . . . . . . . . . . . . . 227, 229
Fluid, Automatic . . . . . . . . . . . . . . . . . . 315
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . 93
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Turn and Lane-Change Signals . . . . 129
U
Umbrella Storage . . . . . . . . . . . . . . . . . . . . 79
Uniform Tire Quality Grading . . . . . . 356
Universal Remote System . . . . . . . . . . 122 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Programming . . . . . . . . . . . . . . . . . . . . . . 122
Updates Map Data . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Using the Navigation System . . . . . . 150
Using the System . . . . . . . . . . . . . . . . . . . 137
Using This Manual . . . . . . . . . . . . . . . . . . . . 2