2021 CADILLAC CT4 fuel filter

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
108 INSTRUMENTS AND CONTROLS
While in the Info Page Options menu,
the info pages can be restored to the
default factory settings by pressing
and holding
Ron the left steering
wheel controls and the thumbwheel
on the right steering wheel controls at
the same time.
Speed : Shows the vehicle speed in
either kilometers per hour (km/h) or
miles per hour (mph).
Trip 1 or Trip 2 and Average Fuel
Economy : The Trip display shows the
current distance traveled, in either
kilometers (km) or miles (mi), since
the trip odometer was last reset. The
trip odometer can be reset by pressing
Vand selecting yes or no while this
display is active.
The Average Fuel Economy display
shows the approximate average liters
per 100 kilometers (L/100 km) or
miles per gallon (mpg). This number
is calculated based on the number of
L/100 km (mpg) recorded since the
last time this menu item was reset.
This number reflects only the
approximate average fuel economy
that the vehicle has right now, and
will change as driving conditions change. The Average Fuel Economy
can be reset by pressing
Vand
selecting yes or no while this display
is active.
Fuel Range : Shows the approximate
distance the vehicle can be driven
without refueling. LOW will be
displayed when the vehicle is low on
fuel. The fuel range estimate is based
on an average of the vehicle's fuel
economy over recent driving history
and the amount of fuel remaining in
the fuel tank.
Oil Life : Shows an estimate of the
oil's remaining useful life.
If REMAINING OIL LIFE 99% is
displayed, that means 99% of the
current oil life remains.
When the remaining oil life is low, the
CHANGE ENGINE OIL SOON message
will appear on the display. The oil
should be changed as soon as
possible. See Engine Oil0312. In
addition to the engine oil life system
monitoring the oil life, additional
maintenance is recommended. See
Maintenance Schedule 0380. The Oil Life display must be reset
after each oil change. It will not reset
itself. Do not reset the Oil Life display
accidentally at any time other than
when the oil has just been changed.
It cannot be reset accurately until the
next oil change. See
Engine Oil Life
System 0314.
Air Filter Life : If equipped, Shows an
estimate of the engine air filter’s
remaining useful life and the state of
the system. Engine Air Filter Life 95%
means 95% of the current air filter life
remains. Messages will display based
on the engine air filter life and the
state of the system. When the
REPLACE AT NEXT OIL CHANGE
message displays, the engine air filter
should be replaced at the time of the
next oil change. When the REPLACE
SOON message displays, the engine air
filter should be replaced at the earliest
convenience.
The Air Filter Life display must be
reset after the engine air filter
replacement. To reset, see Engine Air
Filter Life System 0315.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
112 INSTRUMENTS AND CONTROLS
Current Drive Cycle :Displays
information in relation to the current
drive cycle including Distance
Traveled, Average Fuel Economy, and
the Total Time. They will reset after
the drive cycle is completed.
Driver Assistance : If equipped,
displays the states of all active safety
systems.
Oil Life : Displays an estimate of the
oil's remaining useful life.
If REMAINING OIL LIFE 99% is
displayed, that means 99% of the
current oil life remains.
When the remaining oil life is low, the
CHANGE ENGINE OIL SOON message
will appear on the display. The oil
should be changed as soon as
possible. See Engine Oil0312. In
addition to the engine oil life system
monitoring the oil life, additional
maintenance is recommended in the
Maintenance Schedule. See the
Maintenance Schedule booklet..
The Oil Life display must be reset
after each oil change. It will not reset
itself. Do not reset the Oil Life display
accidentally at any time other than
when the oil has just been changed. It cannot be reset accurately until the
next oil change. See
Engine Oil Life
System 0314.
Air Filter Life : If equipped, shows an
estimate of the engine air filter’s
remaining useful life and the state of
the system. Engine Air Filter Life 95%
means 95% of the current air filter life
remains. Messages will display based
on the engine air filter life and the
state of the system. When the
REPLACE AT NEXT OIL CHANGE
message displays, the engine air filter
should be replaced at the time of the
next oil change. When the REPLACE
NOW message displays, the engine air
filter should be replaced as soon as
possible.
Engine Hours : Displays the total
number of hours the engine has run.
The display also shows the engine idle
hours.
Lifetime Revs : The display also
shows total engine revolutions divided
by 10,000.
Brake Pad Life : If equipped, This
displays an estimate of the remaining
life of the front and rear brake pads.
Messages will display based on brake pad wear and the state of the system.
Reset the Brake Pad Life display after
replacing the brake pads. See
Brake
Pad Life System (If Equipped) 0324.
Head-Up Display (HUD)
{Warning
If the HUD image is too bright or
too high in your field of view, it
may take you more time to see
things you need to see when it is
dark outside. Be sure to keep the
HUD image dim and placed low in
your field of view.
If equipped with HUD, some
information concerning the operation
of the vehicle is projected onto the
windshield. The information is
projected through the HUD lens on
the driver side of the instrument
panel and focused out toward the
front of the vehicle.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
380 SERVICE AND MAINTENANCE
keep the vehicle in good working
condition, improves fuel economy, and
reduces vehicle emissions.
Because of the way people use
vehicles, maintenance needs vary.
There may need to be more frequent
checks and services. The Additional
Required Services - Normal are for
vehicles that:
.Carry passengers and cargo within
recommended limits on the Tire
and Loading Information label. See
Vehicle Load Limits0214.
.Are driven on reasonable road
surfaces within legal driving limits.
.Use the recommended fuel. See
Recommended Fuel (LSY 2.0L L4
Turbo Engine) 0293 or
Recommended Fuel (L3B 2.7L L4
Turbo Engine) 0294.
Refer to the information in the
Maintenance Schedule Additional
Required Services - Normal chart. The Additional Required Services -
Severe are for vehicles that are:
.Mainly driven in heavy city traffic
in hot weather.
.Mainly driven in hilly or
mountainous terrain.
.Used for high speed or competitive
driving.
.Used for taxi, police, or delivery
service.
Refer to the information in the
Maintenance Schedule Additional
Required Services - Severe chart.
{Warning
Performing maintenance work can
be dangerous and can cause serious
injury. Perform maintenance work
only if the required information,
proper tools, and equipment are
available. If they are not, see your
dealer to have a trained technician
do the work. See Doing Your Own
Service Work 0306.
Maintenance Schedule
Owner Checks and Services
Check the engine oil level. See Engine
Oil 0312.
Once a Month
.Check the tire inflation pressures.
See Tire Pressure 0346.
.Inspect the tires for wear. See Tire
Inspection 0352.
.Check the windshield washer fluid
level. See Washer Fluid 0323.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km (600 mi ). If driven
under the best conditions, the engine
oil life system may not indicate the
need for vehicle service for up to a
year. The engine oil and filter must be
changed at least once a year and the

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
SERVICE AND MAINTENANCE 385
Footnotes—Maintenance Schedule
Additional Required Services -
Normal
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0352.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter.
(3) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
See Engine Air Cleaner/Filter 0316.
(4) Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition. (5)
Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced.
(6) Or every five years, whichever
comes first. See Cooling System0317.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace brake fluid every five
years. See Brake Fluid 0325.
(9) Or every 12 months, whichever
comes first. See Wiper Blade
Replacement 0327.
(10) Or every 10 years, whichever
comes first. See Gas Strut(s)0328.
(11) Replace air conditioning
desiccant every seven years.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
388 SERVICE AND MAINTENANCE
Footnotes—Maintenance Schedule
Additional Required Services -
Severe
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0352.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter.
(3) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
See Engine Air Cleaner/Filter 0316.
(4) Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition. (5)
Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced.
(6) Or every five years, whichever
comes first. See Cooling System0317.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace brake fluid every five
years. See Brake Fluid 0325.
(9) Or every 10 years, whichever
comes first. See Gas Strut(s)0328.
(10) Replace air conditioning
desiccant every seven years.Special Application
Services
.Severe Commercial Use Vehicles
Only: Lubricate chassis components
every oil change.
.Have underbody flushing service
performed. See "Underbody
Maintenance" in Exterior Care0370.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
396 TECHNICAL DATA
Vehicle Data
Capacities and Specifications
ApplicationCapacities
Metric English
Air Conditioning Refrigerant For the air conditioning system refrigerant type and charge amount, see the refrigerant label under thehood. See your dealer for more information.
Engine Cooling System*
I2.0L L4 Engine 10.4 L 11.0 qt
I2.7L L4 Engine 13.0 L 13.7 qt
Engine Oil with Filter I2.0L L4 Engine 5.0 L 5.3 qt
I2.7L L4 Engine 5.7 L 6.0 qt
Fuel Tank 66.0 L 17.5 gal
Transfer Case –AWD 0.78 L 0.8 qt
Front Axle –AWD 0.4 L 0.42 qt

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