2022 CADILLAC CT4 service

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
306 DRIVING AND OPERATING
Front Pedestrian Alert
With Head-Up Display
Without Head-Up Display
When the vehicle approaches a
pedestrian ahead too rapidly, the red
FPB alert display will flash on the
windshield. Eight rapid high-pitched
beeps will sound from the front,
or both sides of the Safety Alert Seat
will pulse five times. When this
Pedestrian Alert occurs, the brake
system may prepare for driver braking
to occur more rapidly which can cause
a brief, mild deceleration. Continue to
apply the brake pedal as needed. Cruise control may be disengaged
when the Front Pedestrian Alert
occurs.
Automatic Braking
If FPB detects it is about to crash into
a pedestrian directly ahead, and the
brakes have not been applied, FPB
may automatically brake moderately
or brake hard. This can help to avoid
some very low speed pedestrian
crashes or reduce pedestrian injury.
FPB can automatically brake to
detected pedestrians between 8 km/h
(5 mph) and 80 km/h (50 mph).
Automatic braking levels may be
reduced under certain conditions,
such as higher speeds. If also
equipped with the Night Vision
system, pedestrians detected by the
Night Vision system will not cause
automatic braking to occur.
If this happens, Automatic Braking
may engage the Electric Parking Brake
(EPB) to hold the vehicle at a stop.
Release the EPB. A firm press of the
accelerator pedal will also release
Automatic Braking and the EPB.
{Warning
FPB may alert or automatically
brake the vehicle suddenly in
situations where it is unexpected
and undesired. It could falsely alert
or brake for objects similar in shape
or size to pedestrians, including
shadows. This is normal operation
and the vehicle does not need
service. To override Automatic
Braking, firmly press the accelerator
pedal, if it is safe to do so.
Automatic Braking can be disabled
through vehicle personalization. See
“Front Pedestrian Detection ”in
“Collision/Detection Systems” under
Vehicle Personalization 0120.
{Warning
Using the Front Pedestrian Braking
system while towing a trailer could
cause you to lose control of the
vehicle and crash. Turn the system
to Alert or Off when towing a
trailer.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
308 DRIVING AND OPERATING
How the System Works
The LCA symbol lights up in the
outside mirrors when the system
detects a moving vehicle in the next
lane over that is in the side blind zone
or rapidly approaching that zone from
behind. A lit LCA symbol indicates it
may be unsafe to change lanes. Before
making a lane change, check the LCA
display, check mirrors, glance over
your shoulder, and use the turn
signals.
Left Outside MirrorDisplayRight Outside
Mirror Display
When the vehicle is started, both
outside mirror LCA displays will
briefly come on to indicate the system
is operating. When the vehicle is in a
forward gear, the left or right outside
mirror display will light up if a moving
vehicle is detected in the next lane
over in that blind zone or rapidly
approaching that zone. If the turn signal is activated in the same
direction as a detected vehicle, this
display will flash as an extra warning
not to change lanes.
LCA can be disabled. When you
disable LCA, Side Blind Zone Alert is
also disabled. See
“Collision/Detection
Systems” underVehicle Personalization
0 120. If LCA is disabled by the driver,
the LCA mirror displays will not
light up.
When the System Does Not
Seem to Work Properly
The LCA system requires some driving
for the system to calibrate to
maximum performance. This
calibration may occur more quickly if
the vehicle is driving on a straight
highway road with traffic and roadside
objects (e.g., guardrails, barriers).
LCA displays may not come on when
passing a vehicle quickly, for a
stopped vehicle, or when towing a
trailer. The LCA detection zones that
extend back from the side of the
vehicle do not move further back
when a trailer is towed. Use caution
while changing lanes when towing a trailer. LCA may alert to objects
attached to the vehicle, such as a
trailer, bicycle, or object extending out
to either side of the vehicle. Attached
objects may also interfere with the
detection of vehicles. This is normal
system operation; the vehicle does not
need service.
LCA may not always alert the driver to
vehicles in the next lane over,
especially in wet conditions or when
driving on sharp curves. The system
does not need to be serviced. The
system may light up due to guardrails,
signs, trees, shrubs, and other
non-moving objects. This is normal
system operation; the vehicle does not
need service.
LCA may not operate when the LCA
sensors in the left or right corners of
the rear bumper are covered with
mud, dirt, snow, ice, or slush, or in
heavy rainstorms. For cleaning
instructions, see "Washing the
Vehicle" under
Exterior Care0397.
If the DIC still displays the system
unavailable message after cleaning

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 309
both sides of the vehicle toward the
rear corners of the vehicle, see your
dealer.
If the LCA displays do not light up
when moving vehicles are in the side
blind zone or are rapidly approaching
this zone and the system is clean, the
system may need service. Take the
vehicle to your dealer.
Radio Frequency Information
SeeRadio Frequency Statement 0438.
Lane Keep Assist (LKA)
If equipped, LKA may help avoid
crashes due to unintentional lane
departures. This system uses a camera
to detect lane markings. LKA may be
ready to assist at speeds between
80 km/h (50 mph) and 180 km/h
(112 mph). LKA may assist by gently
turning the steering wheel if the
vehicle approaches a detected lane
marking. It may also provide a Lane
Departure Warning (LDW) alert if the
vehicle unintentionally crosses a
detected lane marking. This system is
not intended to keep the vehicle
centered in the lane. LKA will not assist or alert if the turn signal is
active in the direction of lane
departure, or if it detects that you are
accelerating, braking, or actively
steering. LKA can be overridden by
turning the steering wheel. If the
system detects you are steering
intentionally across a lane marker, the
LDW will not be given. Do not expect
the LDW to occur when you are
intentionally crossing a lane marker.
{Warning
The LKA system does not
continuously steer the vehicle.
It may not keep the vehicle in the
lane or give a Lane Departure
Warning (LDW) alert, even if a lane
marking is detected.
The LKA and LDW systems
may not:
.Provide an alert or enough
steering assist to avoid a lane
departure or crash.
.Detect lane markings under poor
weather or visibility conditions.
This can occur if the windshield
(Continued)
Warning (Continued)
or headlamps are blocked by dirt,
snow, or ice; if they are not in
proper condition; or if the sun
shines directly into the camera.
.Detect road edges.
.Detect lanes on winding or hilly
roads.
If LKA only detects lane markings
on one side of the road, it will only
assist or provide an LDW alert
when approaching the lane on the
side where it has detected a lane
marking. Even with LKA and LDW,
you must steer the vehicle. Always
keep your attention on the road and
maintain proper vehicle position
within the lane, or vehicle damage,
injury, or death could occur. Always
keep the windshield, headlamps,
and camera sensors clean and in
good repair. Do not use LKA in bad
weather conditions or on roads with
unclear lane markings, such as
construction zones.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 311
camera. The LKA system does not
need service. Clean the outside of the
windshield behind the rearview mirror.
LKA assistance and/or LDW alerts
may occur due to tar marks, shadows,
cracks in the road, temporary or
construction lane markings, or other
road imperfections. This is normal
system operation; the vehicle does not
need service. Turn LKA off if these
conditions continue.
Fuel
Top Tier Fuel
GM recommends the use of TOP TIER
Detergent Gasoline to keep the engine
clean, reduce engine deposits, and
maintain optimal vehicle performance.
Look for the TOP TIER Logo or see
www.toptiergas.com for a list of TOP
TIER Detergent Gasoline marketers
and applicable countries.
Recommended Fuel (LSY
2.0L L4 Turbo Engine)
Premium unleaded gasoline meeting
ASTM specification D4814 with a
posted octane rating (R+M)/2 of 91
or greater is recommended.
If unavailable, unleaded gasoline with
a posted octane rating of 87 may be
used, but will result in reduced
performance and driveability. If heavyknocking is heard when using gasoline
rated at 91 or greater, the engine
needs service.
Do not use any fuel labeled E85 or
FlexFuel. Do not use gasoline with
ethanol levels greater than 15% by
volume.
Recommended Fuel (L3B
2.7L L4 Turbo and LF4 3.6L
V6 Twin Turbo Engines)
Premium unleaded gasoline meeting
ASTM specification D4814 with a
posted octane rating (R+M)/2 of 91 or
greater is required. The use of the
correct fuel is an important part of
the proper maintenance of the vehicle
and a condition of the vehicle
warranty. If heavy knocking is heard
when using gasoline rated at 91 or
greater, the engine needs service.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
318 DRIVING AND OPERATING
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
.Start the engine.
.Shift into a gear.
.Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance when Trailer
Towing
The vehicle needs service more often
when used to tow trailers. See
Maintenance Schedule 0408. It is
especially important to check the
automatic transmission fluid, engine
oil, axle lubricant, belts, cooling
system, and brake system before and
during each trip.
Check periodically that all nuts and
bolts on the trailer hitch are tight.
Engine Cooling when Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. See Engine Overheating
0 342.
Trailer Towing (LSY 2.0L L4
Engine)
Caution
Towing a trailer improperly can
damage the vehicle and result in
costly repairs not covered by the
vehicle warranty. To tow a trailer
correctly, follow the directions in
this section and see your dealer for
important information about
towing a trailer with the vehicle.
Never tow a trailer with a V-Series or
V-Series Blackwing. These models are
not designed or intended to tow a
trailer.
Trailer Weight
{Warning
Never exceed the towing capacity
for your vehicle.
Safe trailering requires monitoring the
weight, speed, altitude, road grades,
outside temperature, dimensions of
the front of the trailer, and how
frequently the vehicle is used to tow a
trailer.
Before towing a trailer, always
separately weigh:
.the total weight on the vehicle's
tires.
.the trailer.
.the trailer tongue.
{Warning
You and others could be seriously
injured or killed if the trailer is too
heavy or the trailer brakes are
inadequate for the load. The vehicle
may be damaged, and the repairs
would not be covered by the vehicle
warranty. (Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 321
Turn Signals When Towing a
Trailer
When properly connected, the trailer
turn signals will illuminate to indicate
the vehicle is turning, changing lanes,
or stopping. When towing a trailer,
the arrows on the instrument cluster
will illuminate even if the trailer is not
properly connected or the bulbs are
burned out.
Conversions and
Add-Ons
Add-On Electrical
Equipment
{Warning
The Data Link Connector (DLC) is
used for vehicle service and
Emission Inspection/Maintenance
testing. SeeMalfunction Indicator
Lamp (Check Engine Light) 099.
A device connected to the DLC —
such as an aftermarket fleet or
driver-behavior tracking device —
(Continued)
Warning (Continued)
may interfere with vehicle systems.
This could affect vehicle operation
and cause a crash. Such devices
may also access information stored
in the vehicle’s systems.
Caution
Some electrical equipment can
damage the vehicle or cause
components to not work and would
not be covered by the vehicle
warranty. Always check with your
dealer before adding electrical
equipment.
Add-on equipment can drain the
vehicle's 12-volt battery, even if the
vehicle is not operating.
The vehicle has an airbag system.
Before attempting to add anything
electrical to the vehicle, see Servicing
the Airbag-Equipped Vehicle 058 and
Adding Equipment to the
Airbag-Equipped Vehicle 058.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
322 VEHICLE CARE
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 323
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 323
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 323
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 324
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 326
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 331
Engine Oil Life System . . . . . . . . . . . 333
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Manual Transmission Fluid . . . . . 335
Hydraulic Clutch . . . . . . . . . . . . . . . . . 335
Engine Air Filter Life System . . . . 335
Engine Air Cleaner/Filter . . . . . . . . . 336
Cooling System . . . . . . . . . . . . . . . . . . . 338
Engine Overheating . . . . . . . . . . . . . . 342
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 343
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344 Brake Pad Life System (If
Equipped) . . . . . . . . . . . . . . . . . . . . . . . 346
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 348
Battery - North America . . . . . . . . . 349
All-Wheel Drive . . . . . . . . . . . . . . . . . . 349
Park Brake and P (Park) Mechanism Check . . . . . . . . . . . . . . 350
Wiper Blade Replacement . . . . . . . 350
Windshield Replacement . . . . . . . . 351
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 351Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . 352
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 352
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . 352
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . . . . . 352
LED Lighting . . . . . . . . . . . . . . . . . . . . . 353
Front Turn Signal Lamps . . . . . . . . 353
Electrical System
Electrical System Overload . . . . . . 353
Fuses and Circuit Breakers . . . . . . 355
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Instrument Panel Fuse Block . . . . 358
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
All-Season Tires . . . . . . . . . . . . . . . . . . 363
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 364
Run-Flat Tires . . . . . . . . . . . . . . . . . . . . 364
Self-Sealing Tires . . . . . . . . . . . . . . . . . 365
Low-Profile Tires . . . . . . . . . . . . . . . . . 365
Summer Tires . . . . . . . . . . . . . . . . . . . . 365
Tire Sidewall Labeling . . . . . . . . . . . 366
Tire Designations . . . . . . . . . . . . . . . . . 367
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . . . . . 368
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 370
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . 371
Tire Pressure Monitor System . . . 372
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 373
Tire Inspection . . . . . . . . . . . . . . . . . . . 376
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 376
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Buying New Tires . . . . . . . . . . . . . . . . 379
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Uniform Tire Quality Grading . . . 380
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 382
Wheel Replacement . . . . . . . . . . . . . . 382
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 383

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
VEHICLE CARE 323
If a Tire Goes Flat . . . . . . . . . . . . . . . . 383
Tire Sealant andCompressor Kit . . . . . . . . . . . . . . . . . 384
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . . 390
Jump Starting
Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . . . . . 390
Towing the Vehicle
Towing the Vehicle (ElectronicShifter) . . . . . . . . . . . . . . . . . . . . . . . . . . 393
Towing the Vehicle (Mechanical Shifter) . . . . . . . . . . . . . . . . . . . . . . . . . . 395
Recreational Vehicle Towing . . . . 397
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . 397
Interior Care . . . . . . . . . . . . . . . . . . . . . . 402
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . 405
General Information
For service and parts needs, visit your
dealer. You will receive genuine GM
parts and GM-trained and supported
service people.
Genuine GM parts have one of these
marks:
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag initiators,
seat belt pretensioners, and lithium
batteries contained in electronic keys,
may contain perchlorate materials.
Perchlorate Material –special
handling may apply. See
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and
Modifications
Adding non-dealer accessories or
making modifications to the vehicle
can affect vehicle performance and
safety, including such things as
airbags, braking, stability, ride and
handling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. These accessories or
modifications could even cause
malfunction or damage not covered by
the vehicle warranty.