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Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
SERVICE AND MAINTENANCE 311
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage. The
brake lamps need to be checked
periodically to ensure that they
light when braking.
. With a multi-point inspection,
your dealer can check the lamps
and note any concerns.
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 0297 and
Exterior Care 0293.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
312 SERVICE AND MAINTENANCE
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-13183937) -
2020 - crc - 4/28/20
SERVICE AND MAINTENANCE 313
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 (GM Part No. 12377985) or 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 System0246.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil0241.
Hood Latch Assembly, Secondary Latch,
Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol (GM Part No. 89021668) or lubricant meeting
requirements of NLGI #2, Category LB or GC-LB.
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid.
Key Lock Cylinders, Hood and Door Hinges Multi-Purpose Lubricant, Superlube (GM Part No. 12346241).
Rear Axle/Front Axle (All-Wheel Drive) See your dealer.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
314 SERVICE AND MAINTENANCE
UsageFluid/Lubricant
Transfer Case (All-Wheel Drive) Transfer Case Fluid. See your dealer. Weatherstrip Conditioning Weatherstrip Lubricant. See your dealer. Windshield Washer Automotive windshield washer fluid that meets regional freeze protection
requirements.
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 2.0L L4 engine 84498926 A3245C
2.7L L4 engine 84498926 A3245C
Engine Oil Filter 2.0L L4 engine 55495105 PF66
2.7L L4 engine 55495105 PF66
Passenger Compartment Air Filter Particulate 13508023 CF185
Carbon 23195727 CF184

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
SERVICE AND MAINTENANCE 315
PartGM Part Number ACDelco Part Number
Spark Plugs 2.0L L4 engine 5550435441–103–IP
2.7L L4 engine 1268809441–106–IP
Wiper Blades Driver Side –55 cm (22 in) 84613732—
Passenger Side –45 cm (18 in) 84574892—

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
316 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-13183937) -
2020 - crc - 4/28/20
TECHNICAL DATA 317
Technical Data
Vehicle Identification
Vehicle IdentificationNumber (VIN) . . . . . . . . . . . . . . . . . . . 317
Service Parts Identification . . . . . . 317
Vehicle Data
Capacities and Specifications . . . . 318
Engine Drive Belt Routing . . . . . . . 320
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 and Service Parts
labels 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 “EngineSpecifications”
underCapacities and
Specifications 0318 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-13183937) -
2020 - crc - 4/28/20
CUSTOMER INFORMATION 321
Customer
Information
Customer Information
Customer SatisfactionProcedure . . . . . . . . . . . . . . . . . . . . . . . 321
Customer Assistance Offices . . . . 323
Customer Assistance for Text Telephone (TTY) Users . . . . . . . . . 323
Online Owner Center . . . . . . . . . . . . . 324
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . 324
Roadside Service . . . . . . . . . . . . . . . . . 325
Scheduling Service Appointments . . . . . . . . . . . . . . . . . . . 326
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . . . 327
Collision Damage Repair . . . . . . . . . 328
Publication Ordering Information . . . . . . . . . . . . . . . . . . . . . 330
Radio Frequency Statement . . . . . 330
Reporting Safety Defects
Reporting Safety Defects to the United States Government . . . . . 331
Reporting Safety Defects to the Canadian Government . . . . . . . . . 331
Reporting Safety Defects to
General Motors . . . . . . . . . . . . . . . . . 332
Vehicle Data Recording and
Privacy
Vehicle Data Recording andPrivacy . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Cybersecurity . . . . . . . . . . . . . . . . . . . . . 333
Event Data Recorders . . . . . . . . . . . . 333
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Infotainment System . . . . . . . . . . . . . 334
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.
STEP TWO : If after contacting a
member of dealership management, it
appears your concern cannot be
resolved by your dealership without

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
322 CUSTOMER INFORMATION
further help, in the U.S., call the
Cadillac Customer Assistance Center
at 1-800–458–8006. In Canada, call
the Canadian Cadillac Customer Care
Centre at 1-888-446-2000.
We encourage you to call the toll-free
number in order to give your inquiry
prompt attention. Have the following
information available to give the
Customer Assistance representative:
.Vehicle Identification
Number (VIN). This is available
from the vehicle registration or
title, or the plate at the top left of
the instrument panel and visible
through the windshield.
. Dealership name and location.
. Vehicle delivery date and present
mileage.
When contacting Cadillac, remember
that your concern will likely be
resolved at a dealer's facility. That is
why we suggest following Step One
first.
STEP THREE —U.S. Owners : Both
General Motors and your dealer are
committed to making sure you are
completely satisfied with the new vehicle. However, if you continue to
remain unsatisfied after following the
procedure outlined in Steps One and
Two, you can file with the Better
Business Bureau (BBB) Auto Line
Program to enforce your rights.
The BBB Auto Line Program is an
out-of-court program administered by
BBB National Programs, Inc. to settle
automotive disputes regarding vehicle
repairs or the interpretation of the
New Vehicle Limited Warranty.
Although you may be required to
resort to this informal dispute
resolution program prior to filing a
court action, use of the program is
free of charge and your case will
generally be heard within 40 days.
If you do not agree with the decision
given in your case, you may reject it
and proceed with any other venue for
relief available to you.
You may contact the BBB Auto Line
Program using the toll-free telephone
number or write them at the following
address:
BBB Auto Line Program
BBB National Programs, Inc.
3033 Wilson Boulevard
Suite 600
Arlington, VA 22201
Telephone: 1-800-955-5100
http://www.bbb.org/council/
programs-services/
dispute-handling-and-resolution/
bbb-auto-line
This program is available in all
50 states and the District of Columbia.
Eligibility is limited by vehicle age,
mileage, and other factors. General
Motors reserves the right to change
eligibility limitations and/or
discontinue its participation in this
program.
STEP THREE
—Canadian Owners :
In the event that you do not feel your
concerns have been addressed after
following the procedure outlined in
Steps One and Two, General Motors of
Canada Company wants you to be
aware of its participation in a
no-charge mediation/arbitration
program. General Motors of Canada
Company has committed to binding
arbitration of owner disputes involving

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
CUSTOMER INFORMATION 323
factory-related vehicle service claims.
The program provides for the review
of the facts involved by an impartial
third party arbiter, and may include
an informal hearing before the arbiter.
The program is designed so that the
entire dispute settlement process,
from the time you file your complaint
to the final decision, should be
completed in about 70 days. We
believe our impartial program offers
advantages over courts in most
jurisdictions because it is informal,
quick, and free of charge.
For further information concerning
eligibility in the Canadian Motor
Vehicle Arbitration Plan (CAMVAP),
call toll-free 1-800-207-0685, or call
the Cadillac Customer Care Centre,
1-888-446-2000, or write to:
General Motors Cadillac Customer
Care Centre
General Motors of Canada Company
Mail Code: CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
The inquiry should be accompanied
by the Vehicle Identification
Number (VIN).Customer Assistance
Offices
Cadillac encourages customers to call
the toll-free number for assistance.
However, if a customer wishes to
write or e-mail Cadillac, the letter
should be addressed to:
United States and Puerto Rico
Cadillac Customer Assistance Center
Cadillac Motor Car Division
P.O. Box 33169
Detroit, MI 48232-5169
www.Cadillac.com
1-800-458-8006
1-800-833-2622 (For Text Telephone
devices (TTYs))
Roadside Service: 1-800-224-1400
From U.S. Virgin Islands:
1-800-496-9994
Canada
General Motors of Canada Company
Cadillac Customer Care Centre, Mail
Code: CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
www.cadillaccanada.ca
1-888-446-2000 (English/French)
Cadillac Roadside Service:
1-800-882-1112
Overseas
Contact the local General Motors
Business Unit.
Customer Assistance for
Text Telephone (TTY)
Users
To assist customers who are deaf,
hard of hearing, or speech-impaired
and who use Text Telephones (TTYs),
Cadillac has TTY equipment available
at its Customer Assistance Center. Any
TTY user can communicate with
Cadillac by dialing: 1-800-833-2622.
TTY users in Canada can dial
1-800-263-3830.