Light CADILLAC LYRIC 2023 Owners Manual

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
Vehicle Care 307
Vehicle Care
General Information
General Information . . . . . . 308
California PerchlorateMaterials
Requirements . . . . . . . . . . . . . 308
Accessories and Modifications . . . . . . . . . . . . . 308
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . 309
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Underhood Compartment Overview . . . . . . . . . . . . . . . . . . . . 312
Cooling System . . . . . . . . . . . . . 313
Washer Fluid . . . . . . . . . . . . . . . . 314
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . 315
Brake Fluid . . . . . . . . . . . . . . . . . . . 316
Battery - North America . . . . . . . . . . . . . . . . . . . . . . 317
Park Brake and P (Park) Mechanism Check . . . . . . . 320
Wiper Blade Replacement . . . . . . . . . . . . . . 320
Windshield Replacement . . . . . . . . . . . . . . . 321
Gas Strut(s) . . . . . . . . . . . . . . . . . . 321
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . . 322
Bulb Replacement
Bulb Replacement . . . . . . . . . 323
LED Lighting . . . . . . . . . . . . . . . . 323
Electrical System
High Voltage Devices andWiring . . . . . . . . . . . . . . . . . . . . . . . 323
Electrical System Overload . . . . . . . . . . . . . . . . . . . . 323
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . 325
Underhood Compartment Fuse Block . . . . . . . . . . . . . . . . . 326
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . 331
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
All-Season Tires . . . . . . . . . . . 335
Winter Tires . . . . . . . . . . . . . . . . 336
Self-Sealing Tires . . . . . . . . . 336
Low-Profile Tires . . . . . . . . . . 337
Tire Sidewall Labeling . . . . 337
Tire Designations . . . . . . . . . . 338
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . 339
Tire Pressure . . . . . . . . . . . . . . . 342 Tire Pressure Monitor
System . . . . . . . . . . . . . . . . . . . . . . 343
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . 344
Tire Inspection . . . . . . . . . . . . . 347
Tire Rotation . . . . . . . . . . . . . . . 348
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . . 349
Buying New Tires . . . . . . . . . 350
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 352
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 352
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . 354
Wheel Replacement . . . . . . 354
Tire Chains . . . . . . . . . . . . . . . . . . 355
If a Tire Goes Flat . . . . . . . . . 355
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . 356
Towing the Vehicle
Transporting a DisabledVehicle . . . . . . . . . . . . . . . . . . . . . . 359
Recreational Vehicle Towing . . . . . . . . . . . . . . . . . . . . . . 362

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
316 Vehicle Care
Brake Fluid
The brake master cylinder
reservoir is filled with GM
approved DOT 4 brake fluid as
indicated on the reservoir cap.
See Underhood Compartment
Overview0312 for the
location of the reservoir.
Checking Brake Fluid
With the vehicle in P (Park) on
a level surface, the brake fluid
level should be between the
minimum and maximum marks
on the brake fluid reservoir.
There are only two reasons
why the brake fluid level in the
reservoir may go down:
.Normal brake lining wear.
When new linings are
installed, the fluid level goes
back up.
.A fluid leak in the brake
hydraulic system. Have the
brake hydraulic system fixed.
With a leak, the brakes will
not work well.
Always clean the brake fluid
reservoir cap and the area
around the cap before
removing it.
Do not top off the brake fluid.
Adding fluid does not correct a
leak. If fluid is added when the
linings are worn, there will be
too much fluid when new
brake linings are installed. Add
or remove fluid, as necessary,
only when work is done on the
brake hydraulic system.
When the brake fluid falls to a
low level, the brake warning
light comes on. See Brake
System Warning Light 0115.
Brake fluid absorbs water over
time which degrades the
effectiveness of the brake
fluid. Replace brake fluid at the
specified intervals to prevent increased stopping distance.
See Maintenance Schedule
0
376.
What to Add
Use only GM approved DOT 4
brake fluid from a clean, sealed
container. See Recommended
Fluids and Lubricants 0379.
{Warning
The wrong or contaminated
brake fluid could result in
damage to the brake
system. This could result in
the loss of braking leading to
a possible injury. Always use
the proper GM approved
brake fluid.
Caution
If brake fluid is spilled on the
vehicle's painted surfaces,
the paint finish can be
damaged. Immediately wash
off any painted surface.

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
Vehicle Care 323
Bulb Replacement
For the proper type of
replacement bulbs, or any bulb
changing procedure not listed
in this section, contact your
dealer.
Caution
Do not replace incandescent
bulbs with aftermarket LED
replacement bulbs. This can
cause damage to the vehicle
electrical system.
LED Lighting
This vehicle has several LED
lamps. For replacement of any
LED lighting assembly, contact
your dealer.
Electrical System
High Voltage Devices
and Wiring
{Warning
Exposure to high voltage
can cause shock, burns, and
even death. The high voltage
components in the vehicle
can only be serviced by
technicians with special
training.
High voltage components
are identified by labels. Do
not remove, open, take
apart, or modify these
components. High voltage
cable or wiring has orange
covering or labels. Do not
probe, tamper with, cut,
or modify high voltage cable
or wiring.
Electrical System
Overload
The vehicle has fuses and
circuit breakers to protect
against an electrical system
overload.
When the current electrical
load is too heavy, the circuit
breaker opens and closes,
protecting the circuit until the
current load returns to normal
or the problem is fixed. This
greatly reduces the chance of
circuit overload and fire
caused by electrical problems.
Fuses and circuit breakers
protect the wires that provide
the power to the devices in
your vehicle.
If there is a problem on the
road and a fuse needs to be
replaced, the same amperage
fuse can be borrowed. Choose
some feature of the vehicle
that is not needed to use and
replace it as soon as possible.

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
328 Vehicle Care
Fuses Usage8 MTR MAIN COOL
VLV & ACEC
–
Motor Main
Coolant Valve and
Air Condition
Electric
Compressor
9 Motor: PECP &
Motor: ESSCP
–
Power Electronics
Coolant Pump and
Energy Storage
System
Coolant Pump
10 –
11 –
12 ECP_S & OBCM 2
–
Electrification
Control Processor
(Traction Power
Inverter Module 2)
& On Board
Charging Module 2
13 –
14 – Fuses Usage
15 TRLR PRK LAMPS
–
Trailer Park
Lamps
–
16 TRLR REV LAMP
–
Trailer
Reverse Lamp
–
17 –
18 GLBX DR RELSE
–
Glove Box Release
19 –
20 –
21 CHARGE PORT
DR MTR
–Charge
Port Door Motor
22 AC/DC INV MDL
–
Alternate Current/
Direct Current
Inverter Module
23 –
24 –
25 – Fuses Usage
26 Spare27 –
28 ETC MDL
–
Electronic Toll
Control Module
29 –
30 Rear Cargo APO
–
Rear Cargo
Auxiliary Power
Outlet
31 TRLR INTERFACE
MDL BATT
SOURCE 1
–
Trailer Interface
Module Battery
Source 1
32 Spare
33 Spare
34 ELM 5
–Exterior
Lighting Module 5
35 ELM 4
–Exterior
Lighting Module 4
36 –

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
Vehicle Care 329
Fuses Usage37 –
38 ELM 7
–Exterior
Lighting Module 7
39 ELM 3
–Exterior
Lighting Module 3
40 ECP_E_Batt
SOURCE 1 &
ECP_E_Batt
SOURCE 3
–Elec-
trification Control
Processor
(Traction Power
Inverter Module 1)
Source 3 and 1
41 DSP & AIR
SPRINGS 2
–Door
Switch Panel and
Suspension
Control Leveling 2 Fuses Usage
42 SEAT POS SW &
VKM SNSR/RLH
SNSR
–Seat
Position Switch
and Virtual Key
Module Sensor/
Rain Light
Humidity Sensor
43 SCL & CHIM MDL
–
Steering Column
Lock and Charge
Interface Module
44 PSM & AERO SH
–
Power Sounder
Module and Aero
Shutter
45 RFA MDL & HFC
MDL
–Remote
Function Actuator
Module and
Handsfree Closure
Module Fuses Usage
46 AFL/AHL & PFA
Module
–Adaptive
Forward Lighting/
Automatic
Headlamp Leveling
and Pedestrian
Friendly Alert
Module
47 LIT GRILLE/FR
PRK EMBLEM &
SADS
–Lit Grille/
Front Park
Emblem and Semi
Active Damping
System
48 PWR T/GATE
–
Power Tailgate
49 –
50 MTR WDW
LIFTER LT
–
Motor Window
Lifter
51 AIR SPRINGS 1
–
Suspension
Control Leveling 1

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
332 Vehicle Care
Fuses UsageF1 –
F2 APO/CIGAR LTR –
Auxiliary Power
Outlet Instrument
Panel/Cigar
Lighter
F3 –
F4 USB PORT/APO AC 150W –
Universal Serial
Bus Port/Auxiliary
Power Outlet
Alternating
Current 150W
F5 STRG COL LOCK –RUN/CRANK
Steering
Column Lock
F6 ELM 1– Exterior
Lighting Module 1
F7 AMP-BASE –
Amplifier-Base
F8 RT DR LATCH –
Right Door Latch Fuses Usage
F9 LT DR LATCH –
Left Door Latch
F10 STRG COL POS MDL–Steering
Column Position
Module
F11 ACP 4 –ADAS
Compute
Platform 4
F12 –
F13 EUROPE-TRLR CON & ECP_E/
ECP_S/VICM –
RUN/CRANK
Europe –Trailer
Control and Elec-
trification Control
Processor
(Traction Power
Inverter 1 and 2)/
Vehicle Integration
Control Module
F14 HEADLAMPS –
RUN/CRANK
Headlamps Fuses Usage
F15 HDLP RT –
Headlamp Right
F16 STRG COL/ CLOCK SPRING –
Steering Column
Lock/Clock Spring
F17 SEAT FAN PASS & SEAT FAN
DRVR–RUN/
CRANK Seat Fan
Passenger and
Seat Fan Driver
F18 VCD & SRR –
Virtual Cockpit
Display and Short
Range Radar

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
Vehicle Care 333
Fuses UsageF19 MISC 2 & MISC 1 –
RUN/CRANK
Miscellaneous 2
Switch Bank/
Electronic Toll
Collection/Interior
Particulate Matter
Sensor/Reflective
Light Auxiliary
Display and
Miscellaneous 1
Electronic Brake
Control Module/
Exterior Lighting
Module/Sensing
and Diagnostic
Module/Inside
Rear View Mirror
F20 BCM 1 & VICM –
Body Control
Module 1 and
Vehicle Integration
Control Module Fuses Usage
F21 LRR-RR & EPBS/ ESM–Long
Range Radar –
Rear and Electric
Park Brake
Switch/Electronic
Transmission
Range Select
Shifter Module
F22 VKM/VKBM/AUX JACK & ACP3 –
Virtual Key
Module/Virtual
Key Backup
Module/
Auxiliary Jack
F23 T/LAMP RT & T/ LAMP LT –Tail
Lamp Right and
Tail Lamp Left Fuses Usage
F24 UPA/APA/SBZA & SDM/AOS –
Universal Park
Assist/Automatic
Park Assist/Side
Blind Zone Alert
and Sensing
Diagnostic
Module/Automatic
Occupant Sensing
Module
F25 ACP 2/EOCM_LC/ FCM/MFC & DMS/
CGM/DLC/VDM –
ADAS Compute
Platform 2/
External Object
Calculating
Module/Front
Camera Module/
Multi Function
Control and Driver
Monitoring
System/Central
Gateway Module/
Diagnostic Link
Connector/Vehicle
Data Monitor

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
334 Vehicle Care
Fuses UsageF26 ECP_E_BATT 2/ ACEC & HUD/
HVAC DISPLAY –
Electrification
Control Processor
Battery 2/Air
Condition Electric
Compressor and
Heads-Up Display/
Heating,
Ventilation and Air
Conditioning
Display
F27 BCM 3 –Body
Control Module 3
F28 BCM 2 –Body
Control Module 2
F29 AMP-UPLEVEL –
Amplifier-Uplevel
F30 BCM 4 –Body
Control Module 4 Fuses Usage
F31 VPM/SD CARD/ ILSS/OHC –Video
Processing
Module/SD Card/
Indicator Light and
Solar Sensor/Over
Head Console
F32 HSWM –Heated
Steering Wheel
Module
F33 LRR FR/LIDAR –
Long Range Radar
Front/Light
Detection and
Ranging
F34 ELM 2 –Exterior
Lighting Module 2
F35 HDLP LT –
Headlamp Left
F36 VCU BATT 1 –
Virtual Cockpit
Unit Battery 1
F37 TCP (OnStar) –
Telematics
Communication
Platform Fuses Usage
F38 WCM –Wireless
Charger Module
F39 HI VOLTAGE SYS LCKOUT –High
Voltage System
Lockout
F40 VCU Batt 2 –
Virtual Cockpit
Unit Battery 2
F41 ELM 6 –Exterior
Lighting Module 6
F42 –
Wheels and Tires
Tires
Every new GM vehicle has
high-quality tires made by a
leading tire manufacturer.
See the warranty manual
for information regarding
the tire warranty and
where to get service. For
additional information refer
to the tire manufacturer.

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
340 Vehicle Care
DOT Markings:A code
molded into the sidewall of
a tire signifying that the
tire is in compliance with
the U.S. Department of
Transportation (DOT)
Motor Vehicle Safety
Standards. The DOT code
includes the Tire
Identification Number (TIN),
an alphanumeric designator
which can also identify the
tire manufacturer,
production plant, brand,
and date of production.
GVWR
:Gross Vehicle
Weight Rating. See Vehicle
Load Limits 0202.
GAWR FRT
:Gross Axle
Weight Rating for the front
axle. See Vehicle Load
Limits 0202.
GAWR RR
:Gross Axle
Weight Rating for the rear
axle. See Vehicle Load
Limits 0202. Intended Outboard
Sidewall
:The side of an
asymmetrical tire, that
must always face outward
when mounted on a vehicle.
Kilopascal (kPa)
:The
metric unit for air pressure.
Light Truck (LT-Metric)
Tire
:A tire used on light
duty trucks and some
multipurpose passenger
vehicles.
Load Index
:An assigned
number ranging from 1 to
279 that corresponds to
the load carrying capacity
of a tire.
Maximum Inflation
Pressure
:The maximum
air pressure to which a cold
tire can be inflated. The
maximum air pressure is
molded onto the sidewall. Maximum Load Rating
:
The load rating for a tire at
the maximum permissible
inflation pressure for
that tire.
Occupant Distribution
:
Designated seating
positions.
Outward Facing Sidewall
:
The side of an
asymmetrical tire that has
a particular side that faces
outward when mounted on
a vehicle. The side of the
tire that contains a
whitewall, bears white
lettering, or bears
manufacturer, brand, and/
or model name molding
that is higher or deeper
than the same moldings on
the other sidewall of
the tire.

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
Vehicle Care 341
Passenger (P-Metric)
Tire
:A tire used on
passenger cars and some
light duty trucks and
multipurpose vehicles.
Recommended Inflation
Pressure
:Vehicle
manufacturer's
recommended tire inflation
pressure as shown on the
tire placard. See Tire
Pressure 0342 and
Vehicle Load Limits 0202.
Radial Ply Tire
:A
pneumatic tire in which the
ply cords that extend to
the beads are laid at
90 degrees to the
centerline of the tread.
Rim
:A metal support for a
tire and upon which the tire
beads are seated.
Sidewall
:The portion of a
tire between the tread and
the bead. Speed Rating
:An
alphanumeric code
assigned to a tire indicating
the maximum speed at
which a tire can operate.
Traction
:The friction
between the tire and the
road surface. The amount
of grip provided.
Tread
:The portion of a
tire that comes into
contact with the road.
Treadwear Indicators
:
Narrow bands, sometimes
called wear bars, that show
across the tread of a tire
when only 1.6 mm (1/16 in)
of tread remains. See
When It Is Time for New
Tires 0349.
UTQGS (Uniform Tire
Quality Grading
Standards)
:A tire
information system that
provides consumers with
ratings for a tire's traction, temperature, and
treadwear. Ratings are
determined by tire
manufacturers using
government testing
procedures. The ratings
are molded into the
sidewall of the tire. See
Uniform Tire Quality
Grading
0352.
Vehicle Capacity Weight
:
The number of designated
seating positions multiplied
by 68 kg (150 lbs) plus the
rated cargo load. See
Vehicle Load Limits 0202.
Vehicle Maximum Load on
the Tire
:Load on an
individual tire due to curb
weight, accessory weight,
occupant weight, and cargo
weight.
Vehicle Placard
:A label
permanently attached to a
vehicle showing the
vehicle's capacity weight