2023 CADILLAC CT4 oil filter

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Vehicle Care 383
possible. See Recommended
Fluids and Lubricants0474
for the proper fluid to use.
Hydraulic Clutch
For vehicles with a manual
transmission, it is not
necessary to regularly check
brake/clutch fluid unless there
is a leak suspected. Adding
fluid will not correct a leak.
A fluid loss in this system
could indicate a problem. Have
the system inspected and
repaired.
When to Check and What
to Use
The brake/hydraulic clutch
fluid reservoir cap has this
symbol on it. See Engine
Compartment Overview 0373
for reservoir location. The common hydraulic clutch
and brake master cylinder fluid
reservoir is filled with brake
fluid as indicated on the
reservoir cap. See Brake Fluid
0
398 for brake fluid to use.
How to Check and Add
Fluid
Visually check the brake/
clutch fluid reservoir to make
sure the fluid level is at the
MIN (minimum) line on the side
of the reservoir. The brake/
hydraulic clutch fluid system
should be closed and sealed.
Do not remove the cap to
check the fluid level or to
top-off the fluid level. Remove
the cap only when necessary
to add the proper fluid until
the level reaches the MIN line.
Engine Air Filter Life
System
This feature provides the
engine air filter’s remaining life
and best timing for a change.
The timing to change an engine air filter depends on
driving and environmental
conditions.
When to Change the
Engine Air Filter
When the Driver Information
Center (DIC) displays a
message to replace the engine
air filter at the next oil change,
follow this timing.
When the DIC displays a
message to replace the engine
air filter soon, replace the
engine air filter at the earliest
convenience.
The system must be reset
after the engine air filter is
changed.
If the DIC displays a message
to check the engine air filter
system, see your dealer.
How to Reset the Engine
Air Filter Life System
To reset:
1. Place the vehicle in P (Park).

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Service and Maintenance 469
Maintenance
Schedule
Tire Rotation and
Required Services Every
12 000 km (7,500 mi)
Tires are rotated to achieve a
more uniform wear for all tires.
The first rotation is the most
important.
Anytime unusual wear is
noticed, rotate the tires as
soon as possible, check for
proper tire inflation pressure,
and check for damaged tires
or wheels. If the unusual wear
continues after the rotation,
check the wheel alignment.
See When It Is Time for New
Tires0431 and
Wheel Replacement 0436.
.Perform Multi-Point Vehicle
Inspection. See Multi-Point
Vehicle Inspection (MPVI)
0472.
.Lubricate body components.
See Exterior Care 0455.
Additional Required
Services —Normal
Service
Every 12 000 km (7,500 mi)
.Check engine oil level and oil
life percentage. If needed,
change engine oil and filter,
and reset oil life system. Or
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 oil
life system must be reset.
Your trained dealer
technician can perform this
work. If the engine oil life
system is reset accidentally,
service the vehicle within
5 000 km/3,000 mi since the
last service. Reset the oil life system when the oil is
changed. See Engine Oil Life
System
0381.
.When the REPLACE AT
NEXT OIL CHANGE
message displays, the engine
air filter should be replaced
at the next engine oil
change. When the REPLACE
ENGINE AIR FILTER SOON
message displays, the engine
air filter should be replaced
at the earliest convenience.
Reset the engine air filter life
system after the engine air
filter is replaced. See Engine
Air Filter Life System 0383.
Every 36 000 km (22,500 mi)
.Passenger compartment air
filter replacement (or every
24 months, whichever
occurs first). More frequent
replacement may be needed
if the vehicle is driven in
areas with heavy traffic,
poor air quality, areas with
high dust levels or are
sensitive to environmental
allergens. Filter replacement

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Service and Maintenance 471
Severe Conditions
Requiring More Frequent
Maintenance*
.Public service, military,
or commercial use vehicles
to include the following:
‐Ambulances, police cars,
and emergency rescue
vehicles.
‐ Civilian vehicles such as
light duty pick-up trucks,
SUVs, and passenger cars
that are used in military
applications.
‐ Recovery vehicles such as
tow trucks and flatbed
single vehicle carriers or
any vehicle that is
consistently used in towing
trailers or other loads.
‐ High use commercial
vehicles such as courier
delivery vehicles, private
security patrol vehicles,
or any vehicles that
operate on a 24–hour
basis. ‐
Any vehicle consistently
operated in a high sand or
dust environment such as
those used on oil pipelines
and similar applications.
.Vehicles that are regularly
used for short trips of 6 km
(4 mi) or less.
The oil life indicator will show
you when to change the oil
and filter. Under severe
conditions the indicator may
come on before 12 000 km
(7,500 mi).
* Footnote: Under extreme
driving conditions listed
above, it may be necessary
to replace your spark plugs
at more frequent intervals.
For further assistance in
determining the most
suitable service maintenance
intervals for your vehicle,
please contact your
authorized GM Dealer. Extreme service is for
vehicles mainly driven
off-road in four-wheel drive
or used in farming, mining,
forestry, or snow plowing.Additional Required
Services
—Severe Service
Every 72 000 km (45,000 mi)
.Change automatic
transmission fluid and filter.
.Change transfer case fluid,
if equipped with AWD. 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.
.Change rear axle fluid, with
limited slip differential. Do
not directly power wash the
transfer case and/or front/
rear axle output seals. High

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
472 Service and Maintenance
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.
.Change front axle fluid,
if equipped with AWD. 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.
Every 120 000 km
(75,000 mi)
.Change rear axle fluid,
without limited slip
differential. 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.
Owner Checks and
Services
Every Five Years
.Replace brake fluid every
five years. See Brake Fluid
0
398.
Every Seven Years
.Replace Air Conditioning
Desiccant every seven years.
The air conditioning system
requires maintenance every
seven years. This service
requires replacement of the
desiccant to help the
longevity and efficient
operation of the air
conditioning system. This
service can be complex. See
your dealer.
Multi-Point Vehicle
Inspection (MPVI)
A Multi Point Vehicle
Inspection (MPVI) completed
by a GM dealer technician is a
maintenance assessment of
your vehicle. The benefit of
the MPVI is to identify and
inform the customer of service
items that require immediate
attention and those that may
require attention in the future.
The technician will perform the
following checks on your
vehicle. For a complete list of
checks, inspections, and
services, see your dealer.
Some items may not apply to
your vehicle and/or region.
Diagnostics
.OnStar active, if equipped
.Service history/recall check
Engine Oil and Filter
.Engine oil
.Oil life monitor
‐ Reset oil life monitor

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Service and Maintenance 473
Exterior Lights
.Visual inspection
Windshield and Wipers
.Visual inspection
Battery
.Battery visual inspection
.Battery test results
.Battery cables and
connections
Systems, Fluids, and
Visible Leak Inspection
.Engine oil
.Transmission
.Drive axle
.Transfer case
.Engine cooling system
.Power steering, if equipped
.Fuel system
.Windshield washer fluid
Tire Inspection
.Tire pressure, tread depth,
and wear
.Rotation, if applicable
.Alignment check, optional
.Reset tire pressure monitor
.Check tire sealant expiration
date, if equipped
.Check spare tire, if equipped
Brakes
.Check brake system
Visible and Functional
Inspections
.Seat belt components
.Exhaust system
.Accelerator pedal
.Passenger compartment air
filter, if equipped
.Engine air filter
.Hoses
.Belts
.Shocks and struts
.Steering components
.Axle boots or driveshaft and
u-joints
.Compartment lift struts,
if equipped
.Floor mats secured, no
interference with pedals
.Horn
.Ignition lock, if equipped
.Starter switch
.Evaporative control system
Lubricate
.Chassis components
Special Application
Services
.Severe Commercial Use
Vehicles Only: Lubricate
chassis components every
oil change.
.Have underbody flushing
service performed. See
"Underbody Maintenance" in
Exterior Care 0455.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Service and Maintenance 475
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from
your dealer.Part GM Part NumberACDelco
Part Number
Engine Air Cleaner/Filter
I2.0L L4 Engine 84498926 A3245C
I2.7L L4 Engine 84498926 A3245C
I3.6L V6 Engine (Driver Side) 84335354 A3235C
I3.6L V6 Engine (Passenger Side) 84335354 A3235C
Engine Oil Filter I2.0L L4 engine 55495105 PF66
I2.7L L4 engine 55495105 PF66
I3.6L V6 Engine 12707246 PF63
Passenger Compartment Air Filter IStandard Filter 84987523 CF185
IFine Dust Particulate 23195727 CF206
Spark Plugs I2.0L L4 engine 55504354 41–103–IP
I2.7L L4 engine 12688094 41–106–IP
I3.6L V6 Engine 12662396 41–147

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
480 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 the hood. 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
I3.6L V6 Engine 13.6 L
14.4 qt
I3.6L V6 Engine Intercoolers (V-Series Blackwing) 2.7 L
2.9 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
I3.6L V6 Engine 6.6 L
7.0 qt
Fuel Tank 66.0 L17.5 gal
Transfer Case –AWD 0.78 L0.8 qt
Front Axle –AWD 0.4 L0.42 qt

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
INDEX 513
Driving (cont'd)Loss of Control . . . . . . . . . . . . . 237
Off-Road Recovery . . . . . . . . 237
Track Events and
Competitive . . . . . . . . . . . . . . . 238
Vehicle Load Limits . . . . . . . 255
Wet Roads . . . . . . . . . . . . . . . . . . . 251
Winter . . . . . . . . . . . . . . . . . . . . . . . . 253
Dual Automatic ClimateControl System . . . . . . . . . . . 225
E
ElectricBrake Boost . . . . . . . . . . . . . . . . . 286
Parking Brake . . . . . . . . . . . . . . . 287
Parking Brake Light . . . . . . . . 121
Electrical Equipment, Add-On . . . . . . . 366
System Overload . . . . . . . . . . 404
Electrical System Engine Compartment
Fuse Block . . . . . . . . . . . . . . . . . 407
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . 406
Instrument Panel
Fuse Block . . . . . . . . . . . . . . . . . 409 Electrical System (cont'd)
Rear Compartment
Fuse Block . . . . . . . . . . . . . . . . . . 411
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . 500
Engine Air Cleaner/Filter . . . . . . . . . . 384
Air Filter Life System . . . . . 383
Check Light
(Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 118
Compartment
Overview . . . . . . . . . . . . . . . . . . . 373
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . 114, 115
Coolant Temperature Warning Light . . . . . . . . . . . . . . 124
Cooling System . . . . . . . . . . . . 386
Drive Belt Routing . . . . . . . . . 482
Exhaust . . . . . . . . . . . . . . . . . . . . . . . 271
Heater . . . . . . . . . . . . . . . . . . . . . . . . 266
Oil Life System . . . . . . . . . . . . . . 381
Oil Pressure Light . . . . . . . . . . 127
Overheating . . . . . . . . . . . . . . . . . . 391
Power Messages . . . . . . . . . . . 141
Running While Parked . . . . 272
Starting . . . . . . . . . . . . . . . . . . . . . . 263 Entry Lighting . . . . . . . . . . . . . . . . . .151
Equipment, Towing . . . . . . . . . 365
Event Data Recorders . . . . . 497
Exit Lighting . . . . . . . . . . . . . . . . . . . .151
Extended Parking . . . . . . . . . . . . 271
Extender, Seat Belt . . . . . . . . . . . 57
Exterior
Lamp Controls . . . . . . . . . . . . . . 145
Lamps Off Reminder . . . . . . 147
Lighting Battery Saver . . . 153
F
FilterEngine Air Cleaner . . . . . . . . 384
Flash-to-Pass . . . . . . . . . . . . . . . . . . 147
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . 149
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 437
Floor Mats . . . . . . . . . . . . . . . . . . . . . 465
Fluid Automatic
Transmission . . . . . . . . . . . . . . 382
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 398
Washer . . . . . . . . . . . . . . . . . . . . . . . 393
Folding Mirrors . . . . . . . . . . . . . . . . . 29
Forward Collision Alert (FCA)System . . . . . . . . . . . . . . . . . . . . . . 342