2023 CADILLAC CT4 light

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 261
{Warning
Rocker extensions may
break under pressure,
resulting in property damage
or injury. Do not stand on
the rocker extension or use
it as a step.
{Warning
Rear end spoilers may break
under pressure, resulting in
property damage or injury.
Do not push the vehicle by
the spoiler or use the spoiler
as a handle.
Ignition Positions
The vehicle has an electronic
keyless ignition with
pushbutton start.
The Remote Key must be in
the vehicle for the system to
operate. If the pushbutton
start is not working, the
vehicle may be near a strong
radio antenna signal causing
interference to the Keyless
Access system. See Remote
Key Operation09.
To shift out of P (Park), the
vehicle must be on and the
brake pedal must be applied. Stopping the Engine/OFF (No
Indicator Lights) :
When the
vehicle is stopped, press
ENGINE START/STOP once to
turn the engine off.
If the vehicle is in P (Park), the
ignition will turn off, and
Retained Accessory
Power (RAP) will remain active.
See Retained Accessory
Power (RAP) 0267.
If the vehicle has an automatic
transmission, and is not in
P (Park), the ignition will return
to accessory mode and display
a message in the Driver
Information Center (DIC).
When the vehicle is shifted
into P (Park), the ignition
system will turn OFF.
If the vehicle has a manual
transmission and is stationary,
the ignition will turn off, and
Retained Accessory
Power (RAP) will remain active.
See Retained Accessory
Power (RAP) 0267.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
262 Driving and Operating
The vehicle may have an
electric steering column lock.
The lock is activated when the
vehicle is switched to OFF and
the driver door is opened.
A sound may be heard as the
lock actuates or releases. The
steering column lock may not
release with the wheels
turned off center. If this
happens, the vehicle may not
start. Move the steering wheel
from left to right while
attempting to start the
vehicle. If this does not work,
the vehicle needs service.
Do not turn the engine off
when the vehicle is moving.
This will cause a loss of power
assist in the brake and
steering systems and disable
the airbags.
If the vehicle must be shut off
in an emergency:1. Brake using a firm and steady pressure. Do not
pump the brakes
repeatedly. This may deplete power assist,
requiring increased brake
pedal force.
2. Shift the vehicle to N (Neutral). This can be
done while the vehicle is
moving. After shifting to
N (Neutral), firmly apply the
brakes and steer the
vehicle to a safe location.
3. Come to a complete stop. Shift to P (Park) with an
automatic transmission,
or Neutral with a manual
transmission. Turn the
ignition off.
4. Set the parking brake. See Electric Parking Brake
0287.
{Warning
Turning off the vehicle while
moving may cause loss of
power assist in the brake
and steering systems and
disable the airbags. While
driving, only shut the vehicle
off in an emergency. If the vehicle cannot be pulled
over, and must be shut off
while driving, press and hold
ENGINE START/STOP for
longer than two seconds,
or press twice within
five seconds.
Accessory Mode (Amber
Indicator Light) :
This mode
allows the use of some
electrical accessories when
the engine is off.
With the ignition off, pressing
the button once without the
brake pedal applied will place
the ignition system in
accessory mode.
The ignition will switch from
accessory mode to OFF after
five minutes to prevent
battery rundown.
ON/RUN/START (Green
Indicator Light) : This mode is
for driving and starting. With
the ignition off, and the brake
pedal applied, pressing the
button once will place the
ignition system in ON/RUN/
START. Once engine cranking

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
280 Driving and Operating
Downshifting the transmission
in slippery road conditions
could result in skidding. See
“Skidding”under Loss of
Control 0237.
Caution
Spinning the tires or holding
the vehicle in one place on a
hill using only the
accelerator pedal may
damage the transmission.
The repair will not be
covered by the vehicle
warranty. If the vehicle is
stuck, do not spin the tires.
When stopping on a hill, use
the brakes to hold the
vehicle in place.
Manual Mode
(Mechanical Shifter)
Tap Shift
Caution
Driving with the engine at a
high rpm without upshifting
while using Tap Shift, could
damage the vehicle. Always
upshift when necessary
while using Tap Shift.
Vehicles with Tap Shift have
controls on the back of the
steering wheel to manually
shift the automatic
transmission.
To enter Permanent Tap
Shift Mode: 1. Move the shift lever from D (Drive) to M (Manual
Mode). While in Tap Shift
Mode, the M on the
instrument cluster will
become highlighted, and
the current gear is
indicated.
2. Tap the left control to downshift, and the right
control to upshift. To shift
to the lowest available
gear, press and hold the
left control.
3. To exit, move the shift lever back to D (Drive).
With the shift lever in D (Drive)
and not in Permanent Tap
Shift Mode, the tap shift
controls will activate a
temporary tap manual shift
mode, allowing the

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 281
transmission to be manually
shifted. While in Temporary
Tap Shift Mode, the D on the
instrument cluster will be
highlighted and the current
gear shown. Automatic shifts
return after no manual shifts
have been done for seven to
10 seconds. The Temporary
Tap Shift Mode can also be
deactivated by holding the
right upshift control briefly.
While using Tap Shift, the
vehicle will have firmer, quicker
shifting. You can use this for
sport driving or when climbing
or descending hills, to stay in
gear longer, or to downshift
for more power or engine
braking.
The transmission will only
allow you to shift into gears
appropriate for the vehicle
speed and engine revolutions
per minute (rpm). The
transmission will not
automatically shift to the next
lower gear if the engine rpm is
too high, nor to the nexthigher gear when the
maximum engine rpm is
reached.
If shifting is prevented for any
reason, a SHIFT DENIED
message will be displayed in
the instrument cluster.
Manual Mode
(Electronic Shifter)
Tap Shift
Caution
Driving with the engine at a
high rpm without upshifting
while using Tap Shift, could
damage the vehicle. Always
upshift when necessary
while using Tap Shift.
If equipped, vehicles with Tap
Shift have controls on the
back of the steering wheel to
manually shift the automatic
transmission.
Permanent Tap Shift Mode
To enter Permanent Tap
Shift Mode: 1. With the vehicle in D (Drive), pull back on the
shift lever to activate
M (Manual Mode). The M in
the shift pattern will
illuminate in red, and the D
will switch to white. While
in Permanent Tap Shift

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
282 Driving and Operating
Mode, the M on the
instrument cluster will be
highlighted and the current
gear shown.
2. After releasing the shift lever, it will return to the
center position.
3. Pull the control toward you to shift. Pull the left
control to downshift, and
the right control to upshift.
To shift to the lowest
available gear, pull and hold
the left control.
To exit Permanent Tap
Shift Mode: 1. To exit M (Manual Mode) and return to D (Drive), pull
back on the shift lever. The
D in the shift pattern will
illuminate in red, and the M
will switch to white.
2. After releasing the shift lever, it will return to the
center position.
M (Manual Mode) can be exited
to return to D (Drive) at any
speed by pulling the lever rearward from the center
position. It is not necessary to
stop the vehicle or shift to
N (Neutral) or P (Park) prior to
shifting back to D (Drive).
Temporary Tap Shift Mode
To enter Temporary Tap
Shift Mode:
1. With the transmission in D (Drive) and not in
Permanent Tap Shift
Mode, the Tap Shift
controls will activate a
Temporary Tap Shift
Mode, allowing the
transmission to be
manually shifted. While in
Temporary Tap Shift
Mode, the D on the
instrument cluster will be
highlighted and the current
gear shown.
2. To shift to the lowest available gear, press and
hold the left control.
3. To deactivate, hold the right control briefly.
Automatic shifts return after no manual shifts have
been done for seven to
10 seconds.
While using Tap Shift, the
vehicle will have firmer, quicker
shifting. This can be used for
sport driving or when climbing
or descending hills, to stay in
gear longer, or to downshift
for more power or engine
braking.
The transmission will only
allow shifting into gears
appropriate for the vehicle
speed and engine revolutions
per minute (rpm). If shifting is
prevented for any reason, the
M or D will flash in the
instrument cluster. The
transmission will not
automatically shift to the next
higher gear if the engine rpm
is too high. It will only
automatically shift to the next
lower gear if the engine rpm is
much too low.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
286 Driving and Operating
.When ARM is deactivated,
the gear number is white.
.If no gear number is
displayed while the shift
lever is in gear, service is
required. All rev matching
will be disabled and the
malfunction indicator lamp
will be on. See Malfunction
Indicator Lamp (Check
Engine Light)0118. The
clutch and manual
transmission will continue to
operate normally.
ARM will also:
.Be active above 28 km/h
(18 mph).
.Match engine speed up to
6100 rpm.
.Not operate when the
accelerator pedal is applied.
.Be disabled when the
coolant temperature is
below 0 °C (32 °F).
Drive Systems
All-Wheel Drive
Vehicles with this feature
always send engine power
to all four wheels. It is fully
automatic, and adjusts itself as
needed for road conditions.
Brakes
Electric Brake Boost
Vehicles equipped with
electric brake boost have
hydraulic brake circuits that
are electronically controlled
when the brake pedal is
applied during normal
operation. The system
performs routine tests and
turns off within a few minutes
after the vehicle is turned off.
Noise may be heard during
this time. If the brake pedal is pressed during the tests or
when the electric brake boost
system is off, a noticeable
change in pedal force and
travel may be felt. This is
normal.
Antilock Brake
System (ABS)
The Antilock Brake System
(ABS) helps prevent a braking
skid and maintain steering
while braking hard.
If there is a problem with ABS,
this warning light stays on.
See Antilock Brake System
(ABS) Warning Light
0121.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 287
ABS does not change the time
needed to get a foot on the
brake pedal and does not
always decrease stopping
distance. If you get too close
to the vehicle ahead, there will
not be enough time to apply
the brakes if that vehicle
suddenly slows or stops.
Always leave enough room
ahead to stop, even with ABS.
Using ABS
Do not pump the brakes. Just
hold the brake pedal down
firmly. Hearing and feeling ABS
operate is normal.
Braking in Emergencies
ABS allows steering and
braking at the same time. In
many emergencies, steering
can help even more than
braking.
Electric Parking Brake
The Electric Parking Brake
(EPB) can always be applied,
even if the vehicle is off. In
case of insufficient electrical
power, the EPB cannot be
applied or released. To
prevent draining the battery,
avoid unnecessary repeated
cycles of the EPB.The system has a red parking
brake status light and an
amber service parking brake
warning light. See Electric
Parking Brake Light
0121 and
Service Electric Parking Brake
Light 0121. There are also
parking brake-related Driver
Information Center (DIC)
messages.
Before leaving the vehicle,
check the red parking brake
status light to ensure that the
parking brake is applied.EPB Apply
To apply the EPB:
1. Be sure the vehicle is at a complete stop.
2. Press the EPB switch momentarily.
The red parking brake status
light will flash and then stay on
once the EPB is fully applied.
If the red parking brake status
light flashes continuously, then
the EPB is only partially
applied or there is a problem
with the EPB. A DIC message

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
288 Driving and Operating
will display. Release the EPB
and try to apply it again. If the
light does not come on,
or keeps flashing, have the
vehicle serviced. Do not drive
the vehicle if the red parking
brake status light is flashing.
See your dealer.
If the amber service parking
brake warning light is on,
press the EPB switch.
Continue to hold the switch
until the red parking brake
status light remains on. If the
amber service parking brake
warning light is on, see your
dealer.
If the EPB is applied while the
vehicle is moving, the vehicle
will decelerate as long as the
switch is pressed. If the switch
is pressed until the vehicle
comes to a stop, the EPB will
remain applied.
The vehicle may automatically
apply the EPB in some
situations when the vehicle is
not moving. This is normal, and
is done to periodically checkthe correct operation of the
EPB system, or at the request
of other safety functions that
utilize the EPB.
If the EPB fails to apply, block
the rear wheels to prevent
vehicle movement.
EPB Release
To release the EPB:
1. Turn the ignition on or to accessory mode.
2. Apply and hold the brake pedal.
3. Press the EPB switch momentarily.
The EPB is released when the
red parking brake status light
is off.
If the amber service parking
brake warning light is on,
release the EPB by pressing
and holding the EPB switch.
Continue to hold the switch
until the red parking brake
status light is off. If either light
stays on after release is
attempted, see your dealer.
Caution
Driving with the parking
brake on can overheat the
brake system and cause
premature wear or damage
to brake system parts. Make
sure that the parking brake
is fully released and the
brake warning light is off
before driving.
If you are towing a trailer and
parking on a hill, see Driving
Characteristics and Towing
Tips 0358.
Automatic EPB Release
The EPB will automatically
release if the vehicle is
running, placed into gear, and
an attempt is made to drive
away. Avoid rapid acceleration
when the EPB is applied, to
preserve parking brake
lining life.
The EPB can also be used to
prevent roll back for vehicles
with a manual transmission