2020 CADILLAC CT4 check engine light

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
VEHICLE CARE 289
2.0L L4 Engine Shown, 2.7L L4 EngineSimilar
1. Discharged Battery Remote
Positive Terminal
2. Discharged Battery Negative Grounding Point
3. Good Battery Negative Terminal
4. Good Battery Positive Terminal
The jump start positive terminal (4)
and negative post (3) are on the
battery of the vehicle providing the
jump start. The jump start remote positive
terminal (1) and the remote negative
grounding point (2) for the discharged
battery are on the passenger side of
the vehicle.
The positive jump start connection for
the discharged battery is under a
cover. Lift the cover to expose the
terminal.
1. Check the other vehicle. It must have a 12-volt battery with a
negative ground system.
Caution
If the other vehicle does not have a
12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. Position the two vehicles so that they are not touching. 3. Set the parking brake firmly and
put the shift lever in P (Park)
with an automatic transmission,
or Neutral with a manual
transmission.
Caution
If any accessories are left on or
plugged in during the jump starting
procedure, they could be damaged.
The repairs would not be covered
by the vehicle warranty. Whenever
possible, turn off or unplug all
accessories on either vehicle when
jump starting.
4. Turn the ignition off. Turn off all lights and accessories in both
vehicles, except the hazard
warning flashers if needed.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
310 SERVICE AND MAINTENANCE
Additional Maintenance
and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional maintenance
services may be required.
It is recommended that your dealer
perform these services—their trained
dealer technicians know your vehicle
best. Your dealer can also perform a
thorough assessment with a
multi-point inspection to recommend
when your vehicle may need
attention.
The following list is intended to
explain the services and conditions to
look for that may indicate services are
required.
Battery
The 12-volt battery supplies power to
start the engine and operate any
additional electrical accessories. .
To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. 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 0313 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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
344 INDEX
IndexA
Accessories and Modifications . . . . . 235
Accessory Power . . . . . . . . . . . . . . . . . . . . 163
Active Fuel Management . . . . . . . . . . . 167
Adaptive Cruise Control . . . . . . . . . . . . 194
Add-On Electrical Equipment . . . . . . 231
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . 36
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 36
Air Cleaner/Filter, Engine . . . . . . . . . . 245
Air Conditioning . . . . . . . . . . . . . . . . . . . . 134
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 139
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
How Does an Airbag Restrain? . . . . . 55
Passenger Sensing System . . . . . . . . . 57
What Makes an Airbag Inflate? . . . . 55
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 56
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Where Are the Airbags? . . . . . . . . . . . . 53 Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Passenger Status Indicator . . . . . . . . . 99
Readiness Light . . . . . . . . . . . . . . . . . . . . . 98
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
System Check . . . . . . . . . . . . . . . . . . . . . . . 51
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 22
Alert
Lane Change . . . . . . . . . . . . . . . . . . . . . . 217
Rear Pedestrian . . . . . . . . . . . . . . . . . . . 209
Side Blind Zone (SBZA) . . . . . . . . . . 217
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 268
All-Wheel Drive . . . . . . . . . . . . . . . .178, 255
Antilock Brake System (ABS) . . . . . . 179 Warning Light . . . . . . . . . . . . . . . . . . . . 103
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Assistance Systems for Driving . . . . 210
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 204
Auto Stop
Stop/Start System . . . . . . . . . . . . . . . . 161
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . . . . 27

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
INDEX 345
Automatic (cont'd)Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Emergency Braking (AEB) . . . . . . . . 213
Headlamp System . . . . . . . . . . . . . . . . 128
Transmission . . . . . . . . . . . . . . . . . 169, 171
Transmission Fluid . . . . . . . . . . . . . . . 244
Vehicle Hold Light . . . . . . . . . . . . . . . . 103
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . 176, 177
Automatic Vehicle Hold (AVH) . . . . 181
B
Battery Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Load Management . . . . . . . . . . . . . . . . 131
Power Protection . . . . . . . . . . . . . . . . . . 132
Battery - North America . . . . . .254, 288
Blade Replacement, Wiper . . . . . . . . . 256
Brake Electric Boost . . . . . . . . . . . . . . . . . . . . . 179
Parking, Electric . . . . . . . . . . . . . . . . . . 179
System Warning Light . . . . . . . . . . . . 102
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Braking (cont'd)
Automatic Emergency (AEB) . . . . . 213
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 214
Break-In, New Vehicle . . . . . . . . . . . . . . 157
Bulb Replacement Front Turn Signal Lamps . . . . . . . . 259
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . 258
Headlamp Aiming . . . . . . . . . . . . . . . . 258
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 258
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . . . . . . . 259
Buying New Tires . . . . . . . . . . . . . . . . . . . 282
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 235
California Proposition 65 Warning . . . . . . . . . . . . .234, 254, 288, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2
Capacities and Specifications . . . . . . 318
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . 168
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Winter Driving . . . . . . . . . . . . . . . . . . . . 152 Cargo
Management System . . . . . . . . . . . . . . . 84
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Caution, Danger, and Warning . . . . . . . . 3
Center Console Storage . . . . . . . . . . . . . . 83
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 286
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Charging System Light . . . . . . . . . . . . . . 99
Check Engine Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 100
Child Restraints Infants and Young Children . . . . . . . . 65
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Older Children . . . . . . . . . . . . . . . . . . . . . . 63
Securing . . . . . . . . . . . . . . . . . . . . . . . . .76, 78
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 260
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . 293
Interior Care . . . . . . . . . . . . . . . . . . . . . . 297
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . . . . . 134
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Cluster, Instrument . . . . . . . . . . . . . . . . . . 93
Collision Damage Repair . . . . . . . . . . . 328

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
INDEX 347
Driving (cont'd)Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . 134
E
Electric Brake Boost . . . . . . . . . . . . . . . . 179
Electric Parking Brake . . . . . . . . . . . . . . 179
Electric Parking Brake Light . . . . . . . 102
Electrical Equipment, Add-On . . . . . 231
Electrical SystemEngine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Fuses and Circuit Breakers . . . . . . . 260
Instrument Panel Fuse Block . . . . 262
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 245
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 100
Compartment Overview . . . . . . . . . . 238
Coolant Temperature Gauge . . . . . . . 97
Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . 105 Engine (cont'd)
Cooling System . . . . . . . . . . . . . . . . . . . 246
Drive Belt Routing . . . . . . . . . . . . . . . . 320
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Oil Life System . . . . . . . . . . . . . . . . . . . . 243
Oil Pressure Light . . . . . . . . . . . . . . . . . 107
Overheating . . . . . . . . . . . . . . . . . . . . . . . 250
Power Messages . . . . . . . . . . . . . . . . . . 115
Running While Parked . . . . . . . . . . . 168
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 131
Equipment, Towing . . . . . . . . . . . . . . . . . 230
Event Data Recorders . . . . . . . . . . . . . . 333
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 131
Extended Parking . . . . . . . . . . . . . . . . . . . 167
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 50
Exterior Lamp Controls . . . . . . . . . . . . 125
Exterior Lamps Off Reminder . . . . . . 127
Exterior Lighting Battery Saver . . . . 132
F
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . 245
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 127
Flashers, Hazard Warning . . . . . . . . . . 128
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 Fluid
Automatic Transmission . . . . . . . . . 244
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 26
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Front Seats Heated and Ventilated . . . . . . . . . . . . . 40
Front Turn Signal Lamps . . . . . . . . . . 259
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Economy, Driving for Better . . . . . 142
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . . . . . . 224
Filling the Tank . . . . . . . . . . . . . . . . . . . 222
Foreign Countries . . . . . . . . . . . . . . . . . 222
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Low Fuel Warning Light . . . . . . . . . 107
Management, Active . . . . . . . . . . . . . . 167
Prohibited Fuels . . . . . . . . . . . . . . . . . . 222
Recommended . . . . . . . . . . . . . . . . . . . . 221
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
INDEX 349
K
Keyless EntryRemote (RKE) System . . . . . . . . . . . . . . . 8
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 270
Lamps Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Daytime Running (DRL) . . . . . . . . . . 127
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Exterior Controls . . . . . . . . . . . . . . . . . . 125
Exterior Lamps Off Reminder . . . . 127
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Front Turn Signal . . . . . . . . . . . . . . . . . 259
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 100
On Reminder . . . . . . . . . . . . . . . . . . . . . . 108
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Lane Change Alert (LCA) . . . . . . . . . . . 217
Lane Keep Assist (LKA) . . . . . . . . . . . . 219
Lane Keep Assist Light . . . . . . . . . . . . . 103
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 47
LATCH System Replacing Parts after a Crash . . . . . . 76 LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . . . . 70
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 259
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Illumination Control . . . . . . . . . . . . . . 129
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . 98
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 103
Automatic Vehicle Hold . . . . . . . . . . 103
Brake System Warning . . . . . . . . . . . 102
Charging System . . . . . . . . . . . . . . . . . . . . 99
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 100
Cruise Control . . . . . . . . . . . . . . . . . . . . . 108
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Driver Mode Control . . . . . . . . . . . . . . 106
Electric Parking Brake . . . . . . . . . . . . 102
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 105
Engine Oil Pressure . . . . . . . . . . . . . . . 107
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 127
High-Beam On . . . . . . . . . . . . . . . . . . . . 107
High/Low Beam Changer . . . . . . . . . 127
Lane Keep Assist . . . . . . . . . . . . . . . . . . 103 Lights (cont'd)
Low Fuel Warning . . . . . . . . . . . . . . . . 107
Seat Belt Reminders . . . . . . . . . . . . . . . . 97
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Service Electric Parking Brake . . . 102
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 104
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 106
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . 105
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 104
Limited-Slip Differential . . . . . . . . . . . . 191
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 19
Delayed Locking . . . . . . . . . . . . . . . . . . . . 18
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Lockout Protection . . . . . . . . . . . . . . . . . 19
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 146
Low Fuel Warning Light . . . . . . . . . . . 107
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . 270
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . 70
Lumbar Adjustment . . . . . . . . . . . . . . . . . 36 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
350 INDEX
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . 310
Maintenance Schedule . . . . . . . . . . . . . 303 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . 313
Malfunction Indicator Lamp . . . . . . . 100
Manual Mode . . . . . . . . . . . . . . . . . .176, 177
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . 37
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . 115
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . 115
Mirrors Automatic Dimming . . . . . . . . . . . . . . . . 27
Automatic Dimming Rearview . . . . . 28
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Manual Rearview . . . . . . . . . . . . . . . . . . . 28
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . 27
Mirrors, Interior Rearview . . . . . . . . . . . 28
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Driver Control . . . . . . . . . . . . . . . . . . . . . 184 Monitor System, Tire Pressure . . . . . 276N
Navigation
Connected Services . . . . . . . . . . . . . . . 341
New Vehicle Break-In . . . . . . . . . . . . . . . 157
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Engine Oil Life System . . . . . . . . . . . 243
Pressure Light . . . . . . . . . . . . . . . . . . . . . 107
Older Children, Restraints . . . . . . . . . . . 63
Online Owner Center . . . . . . . . . . . . . . . 324
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
OnStar Additional Information . . . . 337
OnStar Emergency . . . . . . . . . . . . . . . . . . 336
OnStar Overview . . . . . . . . . . . . . . . . . . . . 335
OnStar Security . . . . . . . . . . . . . . . . . . . . . 337
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Overheating, Engine . . . . . . . . . . . . . . . . 250
Overview Instrument Panel . . . . . . . . . . . . . . . . . . . . 5
P
ParkShifting Out of . . . . . . . . . . . . . . . . . . . . 165
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Parking Brake and P (Park)Mechanism Check . . . . . . . . . . . . . . . 256
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Over Things That Burn . . . . . . . . . . . 167
Parking or Backing
Assistance Systems . . . . . . . . . . . . . . . 204
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Passenger Sensing System . . . . . . . . . . 57
Pedestrian Ahead Indicator . . . . . . . . 104
Perchlorate Materials Requirements, California . . . . . . . . . 235
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Protection, Battery . . . . . . . . . . . . . . . . 132
Retained Accessory (RAP) . . . . . . . . 163
Seat Adjustment . . . . . . . . . . . . . . . . . . . . 35

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
352 INDEX
SeatsHead Restraints . . . . . . . . . . . . . . . . . . . . . 34
Heated and Ventilated Front . . . . . . . 40
Lumbar Adjustment, Front . . . . . . . . . 36
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Power Adjustment, Front . . . . . . . . . . 35
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Reclining Seatbacks . . . . . . . . . . . . . . . . 36
Securing Child Restraints . . . . . . . 76, 78
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . 22
Self-Sealing Tires . . . . . . . . . . . . . . . . . . . 269
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Accessories andModifications . . . . . . . . . . . . . . . . . . . . 235
Doing Your Own Work . . . . . . . . . . . 235
Maintenance Records . . . . . . . . . . . . 316
Maintenance, General Information . . . . . . . . . . . . . . . . . . . . . . 302
Parts Identification . . . . . . . . . . . . . . . 317
Scheduling Appointments . . . . . . . . 326
Service Electric Parking Brake
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Services Special Application . . . . . . . . . . . . . . . 309 Servicing the Airbag . . . . . . . . . . . . . . . . . 61
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . 163, 164
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . 165
Side Blind Zone Alert (SBZA) . . . . . . 217
Signals, Turn and Lane-Change . . . . 129
Special Application Services . . . . . . . 309
Specifications and Capacities . . . . . . 318
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . 96
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Start Assist, Hill . . . . . . . . . . . . . . . . . . . . 181
Start Vehicle, Remote . . . . . . . . . . . . . . . 14
Starter Switch Check . . . . . . . . . . . . . . . 255
Starting the Engine . . . . . . . . . . . . . . . . . 160
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Heated Wheel . . . . . . . . . . . . . . . . . . . . . . . 86
Wheel Adjustment . . . . . . . . . . . . . . . . . . 86
Wheel Controls . . . . . . . . . . . . . . . . . . . . . 86
Stop/Start System . . . . . . . . . . . . . . . . . . 161
Storage Areas Cargo Management System . . . . . . . . 84
Center Console . . . . . . . . . . . . . . . . . . . . . . 83
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Umbrella . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Storage Compartments . . . . . . . . . . . . . . 82
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257 Stuck Vehicle . . . . . . . . . . . . . . . . . . . . . . . 153
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . 270
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System
Forward Collision Alert (FCA) . . . . 211
Infotainment . . . . . . . . . . . . . . . . . 133, 334
Systems Driver Assistance . . . . . . . . . . . . . . . . . 203
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Text Telephone (TTY) Users . . . . . . . 323
Theft-Deterrent Systems . . . . . . . . . . . . 24Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . 24
Thigh Support Adjustment . . . . . . . . . . 36
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
All-Season . . . . . . . . . . . . . . . . . . . . . . . . . 268
Buying New Tires . . . . . . . . . . . . . . . . . 282
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Designations . . . . . . . . . . . . . . . . . . . . . . 272
Different Size . . . . . . . . . . . . . . . . . . . . . . 284
If a Tire Goes Flat . . . . . . . . . . . . . . . . 287
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 280
Low Profile . . . . . . . . . . . . . . . . . . . . . . . . 270
Pressure . . . . . . . . . . . . . . . . . . . . . . 275, 276