2021 CADILLAC CT4 CD changer

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 105
This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced by
your dealer.
If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle could
be low on oil and might have some
other system problem. See your dealer.
Low Fuel Warning Light
A Low Fuel Warning Light near the
fuel gauge comes on briefly when the
ignition is turned on as a check to
show it is working.It also comes on when the fuel gauge
indicator nears empty. The light turns
off when fuel is added. If it does not,
have the vehicle serviced.
Security Light
The security light should come on
briefly as the engine is started. If it
does not come on, have the vehicle
serviced by your dealer. If the system
is working normally, the indicator
light turns off.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. See
Immobilizer Operation
0 23.
High-Beam On Light
This light comes on when the
high-beam headlamps are in use. See
Headlamp High/Low-Beam Changer
0128.
IntelliBeam Light
This light comes on when the
IntelliBeam system, if equipped, is
enabled. See Exterior Lamp Controls
0 126.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
126 LIGHTING
Lighting
Exterior Lighting
Exterior Lamp Controls . . . . . . . . . . 126
Exterior Lamps Off Reminder . . . 128
Headlamp High/Low-BeamChanger . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . 128
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . . . 128
Automatic Headlamp System . . . 128
Hazard Warning Flashers . . . . . . . . 129
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Cornering Lamps . . . . . . . . . . . . . . . . . 130
Interior Lighting
Instrument Panel Illumination Control . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Courtesy Lamps . . . . . . . . . . . . . . . . . . 130
Dome Lamps . . . . . . . . . . . . . . . . . . . . . 130
Reading Lamps . . . . . . . . . . . . . . . . . . . 131
Lighting Features
Entry Lighting . . . . . . . . . . . . . . . . . . . . 131
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . 132
Battery Load Management . . . . . . 132
Battery Power Protection . . . . . . . . 133
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Exterior Lighting
Exterior Lamp Controls
The exterior lamp control is on the
turn signal lever.
Turn the control to the following
positions:
O:Turns the exterior lamps off and
deactivates the AUTO mode. Turn to
Oagain to reactivate the AUTO mode.
In Canada, the headlamps will
automatically reactivate when the
vehicle is shifted out of P (Park).
AUTO : Automatically turns the
exterior lamps on and off, depending
on outside lighting.
;: Turns on the parking lamps
including all lamps, except the
headlamps.
2: Turns on the headlamps together
with the parking lamps and
instrument panel lights.
IntelliBeam System
If equipped, this system turns the
vehicle's high-beam headlamps on and
off according to surrounding traffic
conditions.
The system turns the high-beam
headlamps on when it is dark enough
and there is no other traffic present.
This light
bcomes on in the
instrument cluster when the
IntelliBeam system is enabled.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
128 LIGHTING
Exterior Lamps Off
Reminder
A warning chime sounds if the driver
door is opened while the ignition is off
and the exterior lamps are on.
Headlamp High/Low-Beam
Changer
3:Push the turn signal lever away
from you and release, to turn the high
beams on. To return to low beams,
push the lever again or pull it toward
you and release.
This indicator light turns on in the
instrument cluster when the
high-beam headlamps are on.
Flash-to-Pass
To flash the high beams, pull the turn
signal lever toward you, and release.
Daytime Running
Lamps (DRL)
DRL can make it easier for others to
see the front of your vehicle during
the day. Fully functional DRL are
required on all vehicles first sold in
Canada.
If equipped, the DRL will come on
when all of the following conditions
are met:
.The ignition is on.
.The exterior lamp control is
in AUTO.
.The light sensor determines it is
daytime.
The DRL turn off when the headlamps
are turned to
Oor the ignition is off.
For vehicles first sold in Canada, the
DRL can only be turned off when the
vehicle is parked.
Automatic Headlamp
System
When the exterior lamp control is set
to AUTO and it is dark enough
outside, the headlamps come on
automatically.
The light sensor is on top of the
instrument panel or on the windshield
near the rearview mirror. Do not cover
the sensor, otherwise the headlamps
will come on when they are not
needed.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
426 INDEX
Headlamps (cont'd)High/Low Beam Changer . . . . . . . . . 128
Lamps On Reminder . . . . . . . . . . . . . . 106
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . . 82
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 25
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
High-Beam On Light . . . . . . . . . . . . . . . . 105
High-Speed Operation . . . . . . . . . . . . . . 347
Hill and Mountain Roads . . . . . . . . . . 212
Hill Start Assist (HSA) . . . . . . . . . . . . . 238
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
How to Wear Seat Belts Properly . . . 42
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
I
If the System Needs Service . . . . . . . 163
Ignition Positions . . . . . . . . . . . . . . . . . . . 219
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Indicator Pedestrian Ahead . . . . . . . . . . . . . . . . . 102
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 102 Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Information Publication Ordering . . . . . . . . . . . . . 408
Infotainment System . . . . . . . . . . . . . . . 412
Instrument Cluster . . . . . . . . . . . . . . 88, 90
Instrument Panel Overview . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . 26
Introduction . . . . . . . . . . . . . . . . . . . . . . 1, 134
J
Jump Starting - North America . . . . 366
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . 7
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 342
Lamps
Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Daytime Running (DRL) . . . . . . . . . . 128
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Exterior Controls . . . . . . . . . . . . . . . . . . 126
Exterior Lamps Off Reminder . . . . 128
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Lamps (cont'd)
Front Turn Signal . . . . . . . . . . . . . . . . . 330
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
On Reminder . . . . . . . . . . . . . . . . . . . . . . 106
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Lane Change Alert (LCA) . . . . . . . . . . . 289
Lane Keep Assist (LKA) . . . . . . . . . . . . 291
Lane Keep Assist Light . . . . . . . . . . . . . 101
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 44
LATCH System Replacing Parts after a Crash . . . . . 72
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . 65
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 330
Light Performance Shifting . . . . . . . . . . . . . 101
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Illumination Control . . . . . . . . . . . . . . 130
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . 96
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 100
Automatic Vehicle Hold . . . . . . . . . . 101
Brake System Warning . . . . . . . . . . . . 99

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