2023 CADILLAC LYRIC brake

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
320 Vehicle Care
High Voltage Battery
After extended storage, it is
possible that the vehicle may
not operate. If this happens,
the high voltage battery may
need to be plugged in and
charged.
Park Brake and
P (Park) Mechanism
Check
{Warning
When you are doing this
check, the vehicle could
begin to move. You or
others could be injured and
property could be damaged.
Make sure there is room in
front of the vehicle in case it
begins to roll. Be ready to
apply the regular brake at
once should the vehicle
begin to move.Park on a fairly steep hill, with
the vehicle facing downhill.
Keeping your foot on the
regular brake, set the Electric
Parking Brake (EPB).
.To check the EPB's holding
ability: With the propulsion
system active and the
electric drive unit in
N (Neutral), slowly remove
foot pressure from the
regular brake pedal. Do this
until the vehicle is held by
the EPB only.
.To check the P (Park)
mechanism's holding ability:
With the propulsion system
active, shift to P (Park). Then
release the EPB and slowly
remove foot pressure from
the regular brake pedal.
Contact your dealer if service
is required.
Wiper Blade
Replacement
Windshield wiper blades
should be replaced
periodically. See the
Maintenance Schedule 0376.
Replacement blades come in
different types and are
removed in different ways. For
proper type and length, see
Maintenance Replacement
Parts 0380.
Caution
Allowing the wiper arm to
touch the windshield when
no wiper blade is installed
could damage the
windshield. Any damage that
occurs would not be
covered by the vehicle
warranty. Do not allow the
wiper arm to touch the
windshield.

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
330 Vehicle Care
Fuses Usage52 MTR WDW
LIFTER RT
–
Motor Window
Lifter Right
53 FRT WPR
–Front
Wiper
54 TRLR
HEAVYDUTY/
TRLR EUROPE
–
Trailer Battery
55 –
56 FOLD SEAT RT
MTR
–Fold Seat
Right Motor
57 EBCM–
Electronic
Brake Control
Module
58 FRT BLWR MTR
–
Front Blower
Motor
59 –
60 Horn 61 Rear Defog Fuses Usage
62 REAR BLWR MTR
–
Rear Blower
Motor
63 MTR S/ROOF &
SUNSHD
–Motor
Sunroof and
Motor Sunshade
64 PWR SEAT DRVR
–
Power Seat
Driver
65 PWR SEAT PASS
DRVR
–Power
Seat Passenger
Driver
66 CRFM
–
Condenser
Radiator Fan
Module
67 Heated Wiper
68 Spare
69 Spare
70 RELAY’S COIL Fuses Usage
71 REAR HTD/
SEAT 2
–Rear
Heated Seat 2
72 FRT HTD/SEAT 1
–
Front Heated
Seat 1
73 FOLD SEAT LT
MTR
–Fold Seat
Left Motor
74 TRLR INTERFACE
MDL BATT
SOURCE 2
–
Trailer Interface
Module Battery
Source 2
75 Spare
76 Spare 77 Spare
78 TRLR ST/TRN LT
& TRLR RT
–
Trailer Stop Turn
Left and Trailer
Stop Turn Right

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
346 Vehicle Care
message should go off after
successfully completing the
sensor matching process.
See "TPMS Sensor Matching
Process" later in this section.
.One or more TPMS sensors
are missing or damaged. The
malfunction light and the DIC
message should go off when
the TPMS sensors are
installed and the sensor
matching process is
performed successfully. See
your dealer for service.
.Replacement tires or wheels
do not match the original
equipment tires or wheels.
Tires and wheels other than
those recommended could
prevent the TPMS from
functioning properly. See
Buying New Tires0350.
.Operating electronic devices
or being near facilities using
radio wave frequencies
similar to the TPMS could
cause the TPMS sensors to
malfunction. If the TPMS is not functioning
properly, it cannot detect or
signal a low tire pressure
condition. See your dealer for
service if the TPMS
malfunction light and DIC
message come on and stay on.
Tire Fill Alert (If Equipped)
This feature provides visual
and audible alerts outside the
vehicle to help when inflating
an underinflated tire to the
recommended cold tire
pressure.
When the low tire pressure
warning light comes on:
1. Park the vehicle in a safe, level place.
2. Set the parking brake firmly.
3. Place the vehicle in P (Park).
4. Add air to the tire that is underinflated. The turn
signal lamp will flash.
When the recommended
pressure is reached, the
horn sounds once and the turn signal lamp will stop
flashing and briefly turn
solid.
Repeat these steps for all
underinflated tires that have
illuminated the low tire
pressure warning light.{Warning
Overinflating a tire could
cause the tire to rupture
and you or others could be
injured. Do not exceed the
maximum pressure listed on
the tire sidewall. See Tire
Sidewall Labeling 0337 and
Vehicle Load Limits 0202.
If the tire is overinflated by
more than 35 kPa (5 psi), the
horn will sound multiple times
and the turn signal lamp will
continue to flash for several
seconds after filling stops. To
release and correct the
pressure, while the turn signal
lamp is still flashing, briefly
press the center of the valve

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
350 Vehicle Care
GM recommends that tires,
including the spare if
equipped, be replaced after six
years, regardless of tread
wear. To identify the age of a
tire, use the tire manufacture
date, which is the last four
digits of the DOT Tire
Identification Number (TIN)
molded into one side of the
tire sidewall. The last four
digits of the TIN indicate the
tire manufactured date. The
first two digits represent the
week and the last two digits,
the year. For example, the
third week of the year 2020
would have a 4-digit DOT date
of 0320. Week 01 is the first
full week (Sunday through
Saturday) of each year.
Vehicle Storage
Tires age when stored
normally mounted on a parked
vehicle. Park a vehicle that will
be stored for at least a month
in a cool, dry, clean area away
from direct sunlight to slow
aging. This area should be freeof grease, gasoline, or other
substances that can
deteriorate rubber.
Parking for an extended
period can cause flat spots on
the tires that may result in
vibrations while driving. When
storing a vehicle for at least a
month, remove the tires or
raise the vehicle to reduce the
weight from the tires.
Buying New Tires
GM has developed and
matched specific tires for
the vehicle. The original
equipment tires installed
were designed to meet
General Motors Tire
Performance Criteria
Specification (TPC Spec)
system rating. When
replacement tires are
needed, GM strongly
recommends buying tires
with the same TPC Spec
rating.
GM's exclusive TPC Spec
system considers over a
dozen critical specifications
that impact the overall
performance of the vehicle,
including brake system
performance, ride and
handling, traction control,
and tire pressure
monitoring performance.
GM's TPC Spec number is
molded onto the tire's
sidewall near the tire size.
If the tires have an
all-season tread design, the
TPC Spec number will be
followed by MS for mud
and snow. See Tire
Sidewall Labeling
0337 for
additional information.
GM recommends replacing
worn tires in complete sets
of four. Uniform tread
depth on all tires will help
to maintain the
performance of the vehicle.
Braking and handling

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
352 Vehicle Care
Different Size Tires
and Wheels
If wheels or tires are installed
that are a different size than
the original equipment wheels
and tires, vehicle performance,
including its braking, ride and
handling characteristics,
stability, and resistance to
rollover may be affected. If the
vehicle has electronic systems
such as antilock brakes,
rollover airbags, traction
control, electronic stability
control, or All-Wheel Drive, the
performance of these systems
can also be affected.
{Warning
If different sized wheels are
used, there may not be an
acceptable level of
performance and safety if
tires not recommended for
those wheels are selected.
This increases the chance of
a crash and serious injury.(Continued)
Warning (Continued)
Only use GM specific wheel
and tire systems developed
for the vehicle, and have
them properly installed by a
GM certified technician.
See Buying New Tires 0350
and Accessories and
Modifications 0308.
Uniform Tire Quality
Grading
The following information
relates to the system
developed by the United
States National Highway
Traffic Safety
Administration (NHTSA),
which grades tires by
treadwear, traction, and
temperature performance.
This applies only to
vehicles sold in the United
States. The grades are
molded on the sidewalls of
most passenger car tires. The Uniform Tire Quality
Grading (UTQG) system
does not apply to deep
tread, winter tires, compact
spare tires, tires with
nominal rim diameters of
10 to 12 inches
(25 to 30 cm), or to some
limited-production tires.
While the tires available on
General Motors passenger
cars and light trucks may
vary with respect to these
grades, they must also
conform to federal safety
requirements and
additional General Motors
Tire Performance Criteria
(TPC) standards.
Quality grades can be
found where applicable on
the tire sidewall between
tread shoulder and
maximum section width.
For example:

Cadillac Lyriq Owner Manual (GMNA-Localizing-U.S./Canada-15644413) -
2023 - CRC - 2/23/22
Vehicle Care 355
Warning (Continued)
When replacing wheels, use
a new GM original
equipment wheel.
Caution
The wrong wheel can also
cause problems with bearing
life, brake cooling,
speedometer or odometer
calibration, headlamp aim,
bumper height, vehicle
ground clearance, and tire or
tire chain clearance to the
body and chassis.
Tire Chains
Caution
If the vehicle is equipped
with tire size 265/50R20,
use tire winter traction
devices only where legal and
only when necessary. Only
use textile traction devices,(Continued)
Caution (Continued)
such as tire snow socks,
that are the proper size for
the tires. Traction devices
must be installed only on the
tires of the drive axle. Drive
slowly and follow the
traction device
manufacturer’s instructions.
Driving too fast or spinning
the wheels can damage the
traction device.
If a Tire Goes Flat
It is unusual for a tire to blow
out while driving, especially if
the tires are maintained
properly. If air goes out of a
tire, it is much more likely to
leak out slowly. See Tires
0334 for additional
information. But if there ever
is a blowout, here are a few
tips about what to expect and
what to do:
If a front tire fails, the flat tire
creates a drag that pulls the
vehicle toward that side. Take your foot off the accelerator
pedal and grip the steering
wheel firmly. Steer to maintain
lane position, and then gently
brake to a stop, well off the
road, if possible.
A rear blowout, particularly on
a curve, acts much like a skid
and may require the same
correction as used in a skid.
Stop pressing the accelerator
pedal and steer to straighten
the vehicle. It may be very
bumpy and noisy. Gently brake
to a stop, well off the road,
if possible.
The vehicle has no spare tire,
no tire changing equipment,
and no place to store a tire.
If the vehicle has self-sealing
tires, see Self-Sealing Tires
0
336. Tread punctures
typically will not cause tires to
lose air. However, if the vehicle
does get a flat tire, there is no
spare tire, tire changing
equipment, or place to store a
tire. Contact Roadside Service
0 388 for help.