CADILLAC CT4 2021 Owner's Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
390 SERVICE AND MAINTENANCE
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
.Signs of wear may include steering
wheel vibration, bounce/sway while
braking, longer stopping distance,
or uneven tire wear.
.As part of the multi-point
inspection, trained dealer
technicians can visually inspect the
shocks and struts for signs of
leaking, blown seals, or damage, and
can advise when service is needed.
Tires
Tires need to be properly inflated,
rotated, and balanced. Maintaining
the tires can save money and fuel, and
can reduce the risk of tire failure.
.Signs that the tires need to be
replaced include three or more
visible treadwear indicators; cord or
fabric showing through the rubber;
cracks or cuts in the tread or
sidewall; or a bulge or split in
the tire.
.Trained dealer technicians can
inspect and recommend the right
tires. Your dealer can also provide
tire/wheel balancing services to
ensure smooth vehicle operation at
all speeds. Your dealer sells and
services name brand tires.
Vehicle Care
To help keep the vehicle looking like
new, vehicle care products are
available from your dealer. For
information on how to clean and
protect the vehicle’s interior and
exterior, see Interior Care 0375 and
Exterior Care 0370.
Wheel Alignment
Wheel alignment is critical for
ensuring that the tires deliver optimal
wear and performance.
.Signs that the alignment may need
to be adjusted include pulling,
improper vehicle handling,
or unusual tire wear.
.Your dealer has the required
equipment to ensure proper wheel
alignment. Windshield
For safety, appearance, and the best
viewing, keep the windshield clean
and clear.
.Signs of damage include scratches,
cracks, and chips.
.Trained dealer technicians can
inspect the windshield and
recommend proper replacement if
needed.
Wiper Blades
Wiper blades need to be cleaned and
kept in good condition to provide a
clear view.
.Signs of wear include streaking,
skipping across the windshield, and
worn or split rubber.
.Trained dealer technicians can
check the wiper blades and replace
them when needed.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
SERVICE AND MAINTENANCE 391
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-Speed Transmission) 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 System0317.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil0312.
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.
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-14584335) -
2021 - CRC - 11/23/20
392 SERVICE AND MAINTENANCE
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer.Part GM Part Number ACDelco Part Number
Engine Air Cleaner/Filter
I2.0L L4 Engine 84498926 A3245C
I2.7L L4 Engine 84498926 A3245C
Engine Oil Filter I2.0L L4 engine 55495105 PF66
I2.7L L4 engine 55495105 PF66
Passenger Compartment Air Filter IParticulate 13508023 CF185
ICarbon 23195727 CF184

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
SERVICE AND MAINTENANCE 393
PartGM Part Number ACDelco Part Number
Spark Plugs
I2.0L L4 engine 55504354
41–103–IP
I2.7L L4 engine 12688094
41–106–IP
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-14584335) -
2021 - CRC - 11/23/20
394 SERVICE AND MAINTENANCE
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-14584335) -
2021 - CRC - 11/23/20
TECHNICAL DATA 395
Technical Data
Vehicle Identification
Vehicle IdentificationNumber (VIN) . . . . . . . . . . . . . . . . . . . 395
Service Parts Identification . . . . . . 395
Vehicle Data
Capacities and Specifications . . . . 396
Engine Drive Belt Routing . . . . . . . 398
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” underCapacities and
Specifications 0396 for the vehicle's
engine code.
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-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
TECHNICAL DATA 397
ApplicationCapacities
Metric English
Rear Axle
IOpen Differential - Small 0.75 L
0.79 qt
IOpen Differential - Large 1.0 L
1.0 qt
IMechanical Limited Slip 1.0 L
1.0 qt
Wheel Nut Torque (M12) 140Y 100 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual.
Recheck fluid level after filling.
*Engine cooling system capacity values are based on the entire cooling system and its components.
Engine Specifications
Engine VIN CodeTransmission Spark Plug Gap
2.0L L4 Turbo Engine (LSY) KAutomatic0.65–0.75 mm (0.026–0.030 in)
2.7L L4 Turbo Engine (L3B) LAutomatic0.65–0.75 mm (0.026–0.030 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage the
spark plug.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
398 TECHNICAL DATA
Engine Drive Belt Routing
2.0L L4 Engine (LSY)
2.7L L4 Engine (L3B)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
CUSTOMER INFORMATION 399
Customer
Information
Customer Information
Customer SatisfactionProcedure . . . . . . . . . . . . . . . . . . . . . . . 399
Customer Assistance Offices . . . . 401
Customer Assistance for Text Telephone (TTY) Users . . . . . . . . . 402
Online Owner Center . . . . . . . . . . . . . 402
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . 402
Roadside Service . . . . . . . . . . . . . . . . . 403
Scheduling Service Appointments . . . . . . . . . . . . . . . . . . . 405
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . . . 405
Collision Damage Repair . . . . . . . . . 406
Publication Ordering Information . . . . . . . . . . . . . . . . . . . . . 408
Radio Frequency Statement . . . . . 409
Reporting Safety Defects
Reporting Safety Defects to the United States Government . . . . . 409
Reporting Safety Defects to the Canadian Government . . . . . . . . . 409
Reporting Safety Defects to
General Motors . . . . . . . . . . . . . . . . . 410
Vehicle Data Recording and
Privacy
Vehicle Data Recording andPrivacy . . . . . . . . . . . . . . . . . . . . . . . . . . . 410
Cybersecurity . . . . . . . . . . . . . . . . . . . . . 410
Event Data Recorders . . . . . . . . . . . . 411
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
Infotainment System . . . . . . . . . . . . . 412
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, service or parts manager,
contact the owner of your dealership
or the general manager.