2023 CADILLAC CT4 service

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
474 Service and Maintenance
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name or specification, including fluids or lubricants not
listed here, can be obtained from your dealer.Usage Fluid/Lubricant
Automatic Transmission (8-SpeedTransmission) DEXRON-HP Automatic Transmission Fluid.
Automatic Transmission (10-Speed Transmission) DEXRON ULV Automatic Transmission Fluid.
Chassis Lubrication Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB. Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System0386.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade.
ACDelco dexos1 full synthetic is recommended. See Engine Oil 0378.
Hood Latch Assembly, Secondary Latch, Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol or lubricant meeting requirements of NLGI #2,
Category LB or GC-LB.
Hydraulic Brake System DOT 4 Hydraulic Brake Fluid.
Key Lock Cylinders, Hood and Door Hinges Multi-Purpose Lubricant, Superlube. See your dealer.
Manual Transmission DEXRON III Automatic Transmission Fluid.
Rear Axle/Front Axle (All-Wheel Drive) See your dealer.
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection
requirements.

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
476 Service and Maintenance
PartGM Part NumberACDelco
Part Number
Wiper Blades
IDriver Side –55 cm (22 in) 84613732
—
IPassenger Side –45 cm (18 in) 84574892
—

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Service and Maintenance 477
Maintenance Records
After the scheduled services are performed, record the date, odometer reading, who performed
the service, and the type of services performed in the boxes provided. Retain all maintenance
receipts.Date Odometer
Reading Serviced By Maintenance
Stamp Services Performed

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
478 Technical Data
Technical Data
Vehicle Identification
Vehicle IdentificationNumber (VIN) . . . . . . . . . . . . . . 478
Vehicle Identification Number (VIN) (V-Series
Blackwing Only) . . . . . . . . . . . 478
Service Parts Identification . . . . . . . . . . . . . . 479
Vehicle Data
Capacities andSpecifications . . . . . . . . . . . . 480
Engine Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 482
Vehicle
Identification
Vehicle Identification
Number (VIN)
This legal identifier is in the
front corner of the instrument
panel, on the driver side of the
vehicle. It can be seen through
the windshield from outside.
The Vehicle Identification
Number (VIN) also appears on
the Vehicle Certification label
and certificates of title and
registration.
Engine Identification
The eighth character in the
VIN is the engine code. This
code identifies the vehicle's
engine, specifications, and
replacement parts. See
“Engine Specifications” under
Capacities and Specifications
0 480 for the vehicle's
engine code.
Vehicle Identification
Number (VIN)
(V-Series
Blackwing Only)
A serialized plate can be found
at the lower portion of the
steering wheel.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Technical Data 479
The plate will correspond to
the last six digits in the VIN.
1. Vehicle Build:2−Advanced Regular
Production
3 −Advanced Special
Production
4 −Regular Production
5 −Special Production
2. Transmission 6−6-speed Manual
1 − 10-speed Automatic
3. Sequence Number
Service Parts
Identification
There may be a large barcode
on the certification label on
the center pillar that you can
scan for the following
information:
.Vehicle Identification
Number (VIN)
.Model designation
.Paint information
.Production options
If there is not a large barcode
on this label, then you will find
this same information on a
label inside of the trunk.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/5/22
Customer Information 483
Customer
Information
Customer Information
Customer SatisfactionProcedure . . . . . . . . . . . . . . . . . 483
Customer Assistance Offices . . . . . . . . . . . . . . . . . . . . . . 485
Customer Assistance for Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . . 486
Online Account . . . . . . . . . . . . . 486
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . 487
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . 487
Scheduling Service Appointments . . . . . . . . . . . . 490
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . 490
Collision Damage Repair . . . . . . . . . . . . . . . . . . . . . . . . 491
Publication Ordering Information . . . . . . . . . . . . . . . . 494
Radio Frequency Statement . . . . . . . . . . . . . . . . . 494
Reporting Safety Defects
Reporting Safety Defectsto the United States
Government . . . . . . . . . . . . . . . 495
Reporting Safety Defects to the Canadian
Government . . . . . . . . . . . . . . . 495
Reporting Safety Defects to General Motors . . . . . . . 496
Vehicle Data Recording
and Privacy
Vehicle Data Recordingand Privacy . . . . . . . . . . . . . . . . 496
Cybersecurity . . . . . . . . . . . . . . 496
Event Data Recorders . . . 497
OnStar . . . . . . . . . . . . . . . . . . . . . . . . 498
Infotainment System . . . . . 498
Customer
Information
Customer
Satisfaction
Procedure
Your satisfaction and goodwill
are important to your dealer
and to Cadillac. Normally, any
concerns with the sales
transaction or the operation
of the vehicle will be resolved
by your dealer's sales or
service departments.
Sometimes, however, despite
the best intentions of all
concerned, misunderstandings
can occur. If your concern has
not been resolved to your
satisfaction, the following
steps should be taken:
STEP ONE : Discuss your
concern with a member of
dealership management.
Normally, concerns can be
quickly resolved at that level.
If the matter has already been
reviewed with the sales,