2023 CADILLAC CT4 Battery

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
142 Instruments and Controls
This system can replace up to
three remote control
transmitters used to activate
devices such as garage door
openers, security systems,
and home automation devices.
These instructions refer to a
garage door opener, but can
be used for other devices.
Do not use the Universal
Remote system with any
garage door opener that does
not have the stop and reverse
feature. This includes any
garage door opener model
manufactured before April
1, 1982.
Keep the original hand-held
transmitter for use in other
vehicles as well as for future
programming. Erase the
programming when vehicle
ownership is terminated. See
“Erasing Universal Remote
System Buttons”later in this
section.
To program a garage door
opener, park outside directly in
line with and facing the garage door opener receiver. Clear all
people and objects near the
garage door.
Make sure the hand-held
transmitter has a new battery
for quick and accurate
transmission of the
radio-frequency signal.
Programming the
Universal Remote System
Programming involves
time-sensitive actions and may
time out, requiring the
procedure to be repeated.
Read these instructions
completely before
programming the Universal
Remote system. It may help to
have another person assist
with the programming
process.
1. Hold the end of the hand-held transmitter
about 3 to 8 cm (1 to 3 in)
away from the Universal
Remote system buttons
with the indicator light in
view. The hand-held transmitter was supplied
by the manufacturer of the
garage door opener
receiver.
2. Press and release one of the three Universal
Remote system buttons to
be programmed. Press and
hold the hand-held
transmitter button. Do not
release the hand-held
transmitter button until
the indicator light changes
from a slow to a rapid flash
or continuous light. Then
release the hand-held
transmitter button.
Some garage door
openers may require
substitution of Step 2 with
the procedure under
“Radio Signals for Some
Gate Operators” later in
this section.
3. Press and hold the newly programmed Universal
Remote system button for
five seconds while

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Lighting 145
Lighting
Exterior Lighting
Exterior LampControls . . . . . . . . . . . . . . . . . . . . . 145
Exterior Lamps Off Reminder . . . . . . . . . . . . . . . . . . . . 147
Headlamp High/ Low-Beam Changer . . . . . 147
Flash-to-Pass . . . . . . . . . . . . . . . 147
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . 147
Automatic Headlamp System . . . . . . . . . . . . . . . . . . . . . . 148
Hazard Warning Flashers . . . . . . . . . . . . . . . . . . . . . 149
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . 149
Cornering Lamps . . . . . . . . . . 149
Interior Lighting
Instrument Panel Illumination Control . . . . . . 150
Courtesy Lamps . . . . . . . . . . . 150
Dome Lamps . . . . . . . . . . . . . . . . 150
Reading Lamps . . . . . . . . . . . . . 150
Lighting Features
Entry Lighting . . . . . . . . . . . . . . . 151
Exit Lighting . . . . . . . . . . . . . . . . . . 151
Battery Load Management . . . . . . . . . . . . . . . 152
Battery Power
Protection . . . . . . . . . . . . . . . . . . 153
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 153Exterior Lighting
Exterior Lamp
Controls
The exterior lamp control is on
the turn signal lever.
Turn the control to the
following positions:
O:Turns the exterior lamps
off and deactivates the AUTO
mode. Turn to
Oagain to
reactivate the AUTO mode.
In Canada, the headlamps will
automatically reactivate when
the vehicle is shifted out of
P (Park).

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
152 Lighting
The exterior and interior lamps
remain on for a set amount of
time, then automatically
turn off.
The interior lights turn on
when the vehicle is turned off.
The exterior lamps turn off
immediately by turning the
exterior lamp control off.
This feature can be changed.
On the infotainment home
screen, select the Settings
icon
TVehicleTExit Lighting.
Battery Load
Management
The vehicle has Electric Power
Management (EPM), which
estimates the battery's
temperature and state of
charge. It then adjusts the
voltage for best performance
and extended life of the
battery.
When the battery's state of
charge is low, the voltage is
raised slightly to quickly bring
the charge back up. When thestate of charge is high, the
voltage is lowered slightly to
prevent overcharging. If the
vehicle has a voltmeter gauge
or a voltage display on the
Driver Information Center
(DIC), you may see the voltage
move up or down. This is
normal. If there is a problem,
an alert will be displayed.
The battery can be discharged
at idle if the electrical loads
are very high. This is true for
all vehicles. This is because
the generator (alternator) may
not be spinning fast enough at
idle to produce all the power
that is needed for very high
electrical loads.
A high electrical load occurs
when several of the following
are on, such as: headlamps,
high beams, fog lamps, rear
window defogger, climate
control fan at high speed,
heated seats, engine cooling
fans, and loads plugged into
accessory power outlets.
EPM works to prevent
excessive discharge of the
battery. It does this by
balancing the generator's
output and the vehicle's
electrical needs. It can
increase engine idle speed to
generate more power,
whenever needed. It can
temporarily reduce the power
demands of some accessories.
Normally, these actions occur
in steps or levels, without
being noticeable. In rare cases
at the highest levels of
corrective action, this action
may be noticeable to the
driver. If so, a DIC message
might be displayed. If a battery
message is displayed, it is
recommended that the driver
reduce the electrical loads as
much as possible. See Driver
Information Center (DIC) (Base
Level)
0129 or
Driver Information Center
(DIC) (Uplevel) 0132.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Lighting 153
Battery Power
Protection
This feature helps prevent the
battery from being drained,
if the interior courtesy lamps
or reading lamps are
accidentally left on. If any of
these lamps are left on, they
automatically turn off after
10 minutes, if the ignition is off.
The lamps will not come back
on again until one of the
following occurs:
.The ignition is turned on.
.The doors are closed and
then re-opened.
Exterior Lighting
Battery Saver
The exterior lamps turn off
about 10 minutes after the
vehicle is turned off, if the
parking lamps or headlamps
have been manually left on.This protects against draining
the battery. To restart the
10-minute timer, turn the
exterior lamp control to the
O
position and then back to the
;or2position.
To keep the lamps on for more
than 10 minutes, the vehicle
must be on or in
accessory mode.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
184 Infotainment System
.The 12-volt battery has been
disconnected for
several days.
.The vehicle is driving in
heavy traffic where driving is
at low speeds, and the
vehicle is stopped and
started repeatedly.
Problems with Route
Guidance
Inappropriate route guidance
can occur under one or more
of the following conditions:
.The turn was not made on
the road indicated.
.Route guidance might not be
available when using
automatic rerouting for the
next right or left turn.
.The route might not be
changed when using
automatic rerouting.
.There is no route guidance
when turning at an
intersection.
.Plural names of places might
be announced occasionally.
.It could take a long time to
operate automatic rerouting
during high-speed driving.
.Automatic rerouting might
display a route returning to
the set waypoint if heading
for a destination without
passing through a set
waypoint.
.The route prohibits the
entry of a vehicle due to a
regulation by time or season
or any other regulation
which may be given.
.Some routes might not be
searched.
.The route to the destination
might not be shown if there
are new roads, if roads have
recently changed, or if
certain roads are not listed
in the map data. See Maps
0174.
To recalibrate the vehicle's
position on the map, park with
the vehicle running for two to
five minutes, until the vehicle
position updates. Make sure
the vehicle is parked in a location that is safe and has a
clear view of the sky and away
from large obstructions.
If the System Needs
Service
If the navigation system needs
service, see your dealer.
Map Data Updates
The map data in the vehicle is
the most up-to-date
information available when the
vehicle was produced. The
map data is updated
periodically, provided that the
map information has changed
and the vehicle has a relevant
service plan.
See www.gmnavdisc.com for
details on ordering,
purchasing, and installing a
new or replacement SD card.
Features are subject to
change. For more information
on this feature, visit your
brand website. See Online
Account
0486 for details.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
240 Driving and Operating
Axle Fluid
Axles must have 2 400 km
(1,500 mi) before being used in
track driving.
The rear axle fluid
temperatures may be higher
than when driving in severe
conditions. Drain and refill with
new fluid after the first racing
or competitive driving event,
and then after every 24 hours
of racing or competitive
driving. See your dealer for
the correct fluid.
Caution
During a first time track or
racing event, high axle
temperatures can occur.
Damage could be caused to
the axle and would not be
covered by the vehicle
warranty. Do not drive as
long or as fast the first time
the vehicle is driven on the
track or raced.
.The axle lubricant should be
replaced with new lubricant.
.On vehicles without a
differential cooler, additional
cooling capacity is required
for continuous competitive
driving. The V-Series
Blackwing has a differential
cooler, so no additional
cooling capacity is
necessary.
Engine OilCaution
If the vehicle is used for
track events and
competitive driving, the
engine may use more oil
than it would with normal
use. Low oil levels can
damage the engine. Check
the oil level often and
maintain the proper level.
See Engine Oil 0378.
Check the oil level often during
track events and competitive
driving, and keep the oil level
at or near the upper mark. See
“Checking the Engine Oil" in
Engine Oil 0378.
Fuel
Use premium unleaded
gasoline with a posted octane
rating of 93 at a track event.
Unleaded gasoline with a
posted octane rating of
91 may be used, but
performance will be degraded.
See Prohibited Fuels 0355.
Automatic or Manual
Transmission Fluid
Have the transmission fluid
set to the track specific oil
level prior to track usage.
Transmission fluid should be
changed after every 15 hours
of track usage. Any
transmission level set or
change should be performed
at the dealer.
Brakes
Battery Disconnect
Disconnect the battery before
servicing the hydraulic brake
system. It is critical to
disconnect the battery before
bleeding the system, replacing

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 241
the pads, or any other work.
The battery must be
disconnected to prevent the
brake master cylinder from
pressurizing the hydraulic
system during its automated
self diagnostic tests that may
occur when a door is opened
or the remote key is present.
{Warning
To avoid personal injury and/
or vehicle damage, always
disconnect the battery
before performing service
work on the hydraulic brake
system. Bleeding the brake
system with the battery
connected can lead to
excessive pressurization of
the system during automatic
diagnostic tests or diagnosis
of a leak or air in the braking
system. A Diagnostic
Trouble Code (DTC) may set
and vehicle speed may be
limited.Brake Cooling (V-Series
Blackwing)
Prior to any track event, high
speed driving event,
or competitive driving,
complete the following:
1. Ensure all the brake cooling parts are correctly
secured and installed.
2. Inspect and replace any deflectors that have
damage.
3. Inspect for blockage in the front brake cooling duct
prior to every event.
If improved brake cooling is
desired, install the ball joint
protector front shields,
remove both upper and lower
rear rotor shields, and install
the rear lower control arm
cooling deflectors, per the
instructions included with the
brake cooling kit. These parts
are for track use only. After
track events reinstall original
front and rear rotor shields,
and remove rear lower control
arm cooling deflectors.Right Side Front Shown, Left Side Front Similar
1. Front Lower Control Arm Deflector

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
242 Driving and Operating
2. Front Brake Cooling Duct
Brake Pad Wear Sensors
If equipped, the brake pad
wear sensors need to be
removed from the brake
calipers prior to any track or
racing event. The original
sensors can be reinstalled if
significant brake pad wear is
not observed. Refer to Brake
Pad Life System (If Equipped)
0 396. If the sensors are not
reinstalled after the track
event, install brake pad wear
sensor plugs. See your dealer.
The V-Series Blackwing is
equipped with brake pad wear
sensors which are track
capable and should not be
disabled for track and racing.
A message will display in the
Driver Information Center
(DIC) when the brake pads
show excessive wear.
Brake Fluid
Replace existing brake fluid
with a qualified DOT 4 high
performance brake fluid from a sealed container. Brake fluid
with a dry boiling point >310 °C
(590 °F) is qualified. If high
performance brake fluid is
used, replace it with GM
approved brake fluid before
driving on public roads. If high
performance brake fluid is in
the vehicle and the age of the
brake fluid is over a month old
or unknown, replace the brake
fluid before track events and
competitive driving. Do not use
silicone or DOT 5 brake fluids.
Disconnect the battery before
bleeding the system, replacing
the pads, or any other work.
The battery must be
disconnected to prevent the
brake master cylinder from
pressurizing the hydraulic
system during its automated
self diagnostic tests that may
occur when a door is opened
or the remote key is present.
Check the fluid level before
each competitive driving
event.
Brake System Flushing &
Bleeding
The J55 brake system
requires specific processes
for bleeding and fluid flushing.
These can be found in the
service manual.
Properly bleeding the brake
system is required for proper
operation of the hydraulic
brake system.
Brake Leak Detection
The hydraulic braking system
has advanced diagnostic
capability to help detect
hydraulic leaks, trapped air,
and other performance issues.
These diagnostics are active
when the hydraulic system is
powered. In order to avoid
inadvertently setting a leak
Diagnostic Trouble Code
(DTC), disconnect the battery
before servicing the brake
system.
If the vehicle sets a DTC
related to a brake system leak,
the Brake System Warning