engine CADILLAC CT5 2023 Repair Manual

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 267
{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) 0273.
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) 0273.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
268 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
0288.
{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 CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 269
begins, release the button.
Engine cranking will continue
until the engine starts. See
Starting the Engine0269. The
ignition will then remain on.
Service Mode
This power mode is available
for service and diagnostics,
and to verify the proper
operation of the malfunction
indicator lamp as may be
required for emission
inspection purposes. With the
vehicle off, and the brake
pedal not applied, pressing
and holding ENGINE START/
STOP for more than
five seconds will place the
vehicle in Service Mode. The
instruments and audio
systems will operate as they
do in ON/RUN, but the vehicle
will not be able to be driven.
The engine will not start in
Service Mode. Press the
button again to turn the
vehicle off.Starting the Engine
Place the transmission in the
proper gear
Caution
If you add electrical parts or
accessories, you could
change the way the engine
operates. Any resulting
damage would not be
covered by the vehicle
warranty. See Add-On
Electrical Equipment 0372.
Automatic Transmission
Move the shift lever to
P (Park) or N (Neutral). To
restart the vehicle when it is
already moving, use
N (Neutral) only.
Caution
Do not try to shift to P (Park)
if the vehicle is moving.
If you do, you could damage (Continued)
Caution (Continued)
the transmission. Shift to
P (Park) only when the
vehicle is stopped.
Manual Transmission
The shift lever should be in
Neutral and the parking brake
engaged. Hold the clutch pedal
down to the floor, press the
brake pedal, and start the
engine.
Starting the Vehicle 1. For vehicles with an automatic transmission,
press the brake pedal, then
press ENGINE START/
STOP on the instrument
panel. For a manual
transmission, place the
shift lever in Neutral with
the parking brake engaged.
Hold the clutch pedal down
to the floor, press the
brake pedal, then press
ENGINE START/STOP.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
270 Driving and Operating
If the remote key is not in
the vehicle, if there is
interference, or if the
remote key battery is low,
a Driver Information
Center (DIC) message will
display. See Remote Key
Operation09.
Caution
Cranking the engine for long
periods of time, by pressing
ENGINE START/STOP
immediately after cranking
has ended, can overheat and
damage the cranking motor,
and drain the battery. Wait
at least 15 seconds between
each try, to let the cranking
motor cool down.
2. If the engine does not start after five to 10 seconds,
especially in very cold
weather (below −18 °C or
0 °F), it could be flooded
with too much gasoline.
Try pushing the
accelerator pedal all the
way to the floor and hold it there, then press ENGINE
START/STOP for up to a
maximum of 15 seconds.
Wait at least 15 seconds
between each try, to allow
the cranking motor to cool
down. When the engine
starts, let go of the button
and the accelerator. If the
vehicle starts briefly but
then stops again, do the
same thing. This clears the
extra gasoline from the
engine. Do not race the
engine immediately after
starting it. Operate the
engine and transmission
gently until the oil warms
up and lubricates all
moving parts.
Stopping the Engine
If the vehicle has an automatic
transmission, move the shift
lever to P (Park) and press and
hold ENGINE START/STOP on
the instrument panel, until the
engine shuts off. If the shift
lever is not in P (Park), the
engine shuts off and the
ignition goes to accessory
mode. The DIC displays SHIFT
TO PARK. Once the shift lever
is moved to P (Park), the
vehicle turns off.
If the vehicle has a manual
transmission, before getting
out of the vehicle, shift to
1 (First) or R (Reverse) and
apply the parking brake. Then
turn off the ignition off by
pressing ENGINE START/
STOP and release the clutch
pedal when the engine has
stopped.
If the remote key is not
detected inside the vehicle
when it is turned off the DIC
displays a message.
Stop/Start System
If equipped, the Stop/Start
system will shut off the engine
to help conserve fuel. It has
components designed for the
increased number of starts.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 271
{Warning
The automatic engine Stop/
Start feature causes the
engine to shut off while the
vehicle is still on. Do not exit
the vehicle before shifting to
P (Park). The vehicle may
restart and move
unexpectedly. Always shift
to P (Park), and then turn
the ignition off before
exiting the vehicle.
Auto Engine Stop/Start
When the brakes are applied
and the vehicle is at a
complete stop, the engine may
turn off. When stopped, the
tachometer displays AUTO
STOP. See Tachometer 0120.
When the brake pedal is
released or the accelerator
pedal is pressed, the engine
will restart. To maintain vehicle
performance, other conditions
may cause the engine to
automatically restart before
the brake pedal is released.
Auto Stops may not occur
and/or Auto Starts may occur
because:
.The climate control settings
require the engine to be
running to cool or heat the
vehicle interior.
.The vehicle battery needs to
charge.
.The vehicle battery has
recently been disconnected.
.Minimum vehicle speed has
not been reached since the
last Auto Stop.
.The accelerator pedal is
pressed.
.The engine or transmission
is not at the required
operating temperature.
.The outside temperature is
not in the required operating
range.
.The vehicle is shifted out of
D (Drive) to any gear other
than P (Park).
.Certain driver modes have
been selected. See Driver
Mode Control
0293.
.The vehicle is on a steep hill
or grade.
.The driver door has been
opened or the driver seat
belt has been unbuckled.
.The hood has been opened.
.The Auto Stop has reached
the maximum allowed time.
Auto Stop Disable Switch

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
272 Driving and Operating
The automatic engine Stop/
Start feature can be disabled
and enabled by pressing
h.
Auto Stop/Start is enabled
each time you start the
vehicle.
When the
hindicator is
illuminated, the system is
enabled.
Engine Heater
Vehicles with the engine
heater can use this option in
cold weather conditions at or
below −18 °C (0 °F) for easier
starting and better fuel
economy during engine
warm-up. Plug in the engine
heater at least four hours
before starting your vehicle.
An internal thermostat in the
plug-end of the cord may exist
which will prevent engine
heater operation at
temperatures above
−18 °C (0 °F).
To Use the Engine Heater
1. Turn off the engine.
Check the heater cord for
damage. If it is damaged,
do not use it. See your
dealer for a replacement.
Inspect the cord for
damage yearly.
2. Plug the heater cord intothe connector in the front
license plate bracket.
3. Plug it into a normal, grounded 110-volt AC
outlet.
{Warning
Improper use of the heater
cord or an extension cord
can damage the cord and
may result in overheating
and fire.
.Plug the cord into a
three-prong electrical
utility receptacle that is
protected by a ground
fault detection function.
An ungrounded outlet
could cause an electric
shock.
.Use a weatherproof,
heavy-duty, 15 amp-rated
extension cord if needed.
Failure to use the
recommended extension
cord in good operating
condition, or using a
damaged heater or
extension cord, could
make it overheat and
(Continued)

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 273
Warning (Continued)
cause a fire, property
damage, electric shock,
and injury.
.Do not operate the vehicle
with the heater cord
permanently attached to
the vehicle. Possible
heater cord and
thermostat damage could
occur.
.While in use, do not let the
heater cord touch vehicle
parts or sharp edges.
Never close the hood on
the heater cord.
.Before starting the
vehicle, unplug the cord,
reattach the cover to the
plug, and securely fasten
the cord. Keep the cord
away from any moving
parts.
4. Before starting the engine, be sure to unplug and
store the cord as it was
before to keep it away from moving engine parts.
If you do not, it could be
damaged.
Contact your dealer for
information on how long to
use the heater in your
particular area.
Retained Accessory
Power (RAP)
When the vehicle is turned
from on to off, the following
features (if equipped) will
continue to function for up to
10 minutes, or until the driver
door is opened. These
features will also work when
the vehicle is on or in
accessory mode:
.Infotainment System
.Power Windows (during RAP
this functionality will be lost
when any door is opened)
.Sunroof (during RAP this
functionality will be lost
when any door is opened)
.Auxiliary Power Outlet
.Audio System
.OnStar System
Shifting Into Park
To shift into P (Park): 1. Hold the brake pedal down and set the parking brake.
See Electric Parking Brake
0288.
2. Press the button on top of the shift lever to shift into
P (Park). See Automatic
Transmission 0277.
3. The P indicator on the shift lever will turn red when the
vehicle is in P (Park).
If the vehicle is shifted into
P (Park) on a hill, the
Electric Parking Brake
(EPB) may apply
automatically. You may not
be able to release the EPB
using the EPB switch.
It should automatically
release when the vehicle is
shifted out of P (Park).

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
274 Driving and Operating
Leaving the Vehicle with
the Engine Running
{Warning
It can be dangerous to leave
the vehicle with the engine
running. It could overheat
and catch fire.
It is dangerous to get out of
the vehicle if the vehicle is
not in P (Park) with the
parking brake set. The
vehicle can roll.
Do not leave the vehicle
when the engine is running.
If you have left the engine
running, the vehicle can
move suddenly. You or
others could be injured. To
be sure the vehicle will not
move, even when you are on
fairly level ground, always
set the parking brake and(Continued)
Warning (Continued)
shift to P (Park). See Shifting
Into Park0273. If you are
towing a trailer, see Driving
Characteristics and Towing
Tips 0365.
If you have to leave the vehicle
with the engine running, be
sure the vehicle is in P (Park)
and the parking brake is set
before you leave it.
If you are towing a trailer and
parking on a hill, see Driving
Characteristics and Towing
Tips 0365.
Shifting out of Park
This vehicle is equipped with
an electronic transmission.
The shift lock release button is
designed to prevent
inadvertent shifting out of
P (Park). To shift out of P (Park):
1. Ensure the engine is running.
2. Apply the brake pedal.
3. Press and hold the shift lock release button on the
shift lever.
4. Move the shift lever to the desired position. For
N (Neutral) hold the lever in
the N (Neutral) position
until the N indicator
illuminates red.
5. The P indicator will turn white and the gear
indicator will turn red when
the vehicle is no longer in
P (Park).
6. After releasing the shift lever, it will return to the
center position.
If equipped, the Buckle to
Drive feature may prevent
shifting from P (Park). See
Buckle To Drive 056.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 275
If the vehicle cannot shift from
P (Park), a Driver Information
Center (DIC) message may be
displayed. Check that the
ignition is on, the engine is
running, the brake pedal is
applied, and the shift lock
release button is pressed
when you are attempting to
shift out of P (Park). If all of
these are met but the vehicle
will not shift out of P (Park),
see your dealer for service.
Parking (Manual
Transmission)
{Warning
If the vehicle has a manual
transmission, never get out
of the vehicle without first
moving the shift lever into
1st or R (Reverse), setting
the parking brake and
turning the ignition off. The
vehicle can roll, which could
cause serious injury or
death.
Parking over Things
That Burn
{Warning
Things that can burn could
touch hot exhaust parts
under the vehicle and ignite.
Do not park over papers,
leaves, dry grass, or other
things that can burn.
Active Fuel
Management
This vehicle's engine may be
equipped with Active Fuel
Management, which allows the
engine to operate on either all
of its cylinders, or in reduced
cylinder operation mode,
depending on the driving
conditions.
When less power is required,
such as cruising at a constant
vehicle speed, the system will
operate in reduced cylinder
operation mode, allowing the
vehicle to achieve better fueleconomy. When greater
power demands are required,
such as accelerating from a
stop, passing, or merging onto
a freeway, the system will
maintain full-cylinder
operation.
If the vehicle has an Active
Fuel Management indicator,
see Driver Information Center
(DIC) for more information on
using this display.
Extended Parking
It is best not to park with the
vehicle running. If the vehicle is
left running, be sure it will not
move and there is adequate
ventilation.
See Shifting Into Park
0273
and
Engine Exhaust 0276.
If the vehicle is left parked and
running with the remote key
outside the vehicle, it will
continue to run for up to
15 minutes.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
276 Driving and Operating
If the vehicle is left parked and
running with the remote key
inside the vehicle, it will
continue to run for up to
30 minutes.
The vehicle could turn off
sooner if it is parked on a hill,
due to lack of available fuel.
Automatic Transmission
The timer will reset if the
vehicle is taken out of P (Park)
while it is running.
Manual Transmission
The timer will reset if vehicle
speed exceeds 4
km/h (2.5 mph).
Engine Exhaust{
Warning
Engine exhaust contains
carbon monoxide (CO),
which cannot be seen or
smelled. Exposure to CO can
cause unconsciousness and
even death. (Continued)
Warning (Continued)
Exhaust may enter the
vehicle if:
.The vehicle idles in areas
with poor ventilation
(parking garages, tunnels,
deep snow that may block
underbody airflow or tail
pipes).
.The exhaust smells or
sounds strange or
different.
.The exhaust system leaks
due to corrosion or
damage.
.The vehicle exhaust
system has been modified,
damaged, or improperly
repaired.
.There are holes or
openings in the vehicle
body from damage or
aftermarket modifications
that are not completely
sealed.(Continued)
Warning (Continued)
If unusual fumes are
detected or if it is suspected
that exhaust is coming into
the vehicle:
.Drive it only with the
windows completely down.
.Have the vehicle repaired
immediately.
Never park the vehicle with
the engine running in an
enclosed area such as a
garage or a building that has
no fresh air ventilation.
Running the Vehicle
While Parked
The vehicle should not be left
running while parked.
If the vehicle is left with the
engine running, follow the
proper steps to be sure the
vehicle will not move. See
Shifting Into Park 0273 and
Engine Exhaust 0276.