2020 CADILLAC CT4 engine

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
188 DRIVING AND OPERATING
braking, and high acceleration to
select and hold lower gears when not
using paddles. The shifts are also
firmer to increase the quickness of
shifting.
Engine Sound
Adjusts the volume of engine noise.
Steering (Assist Effort)
Adjusts from a lighter steering feel in
Tour Mode to reduced assist in Sport
and Track Mode for more
steering feel.
Magnetic Ride Control (If Equipped)
Adjusts the shock dampening
firmness from a comfort tune in Tour
Mode to an optimized responsiveness
tune in Sport and Track.
Stability Control
.Competitive Mode allows less
computer control to permit some
slide and drift and is selected with
the button –only available in
Sport Mode. .
StabiliTrak/Electronic Stability
Control (ESC) can be turned off by
pressing and holding the button
for five seconds.
Brake Response
Adjusts brake pedal sensitivity by
selecting how quick or slow the brakes
reply to input.
Driver Mode Customization
The vehicle is equipped to modify
following vehicle settings based on
vehicle content. See Driving Mode
under Vehicle Personalization 0116 to
customize and personalize My Mode
and/or V–Mode..
Engine Sound
Engine sound adjusts the volume of
engine noise. Setting ranges from
quietest to loudest volume as you
move from Stealth through Track.
. Stealth, Tour, Sport, Track Steering
This setting adjusts the effort required
to turn the steering wheel. The
steering wheel offers better feedback
but requires more effort as you move
from Tour to Track.
.
Tour, Sport, Track
Suspension
This setting adjusts the firmness of
the suspension in the vehicle.
Suspension adjust stiffness of the
shocks and / or springs. The ride is
more comfortable at lower settings
and is stiffer at higher settings for
better control.
. Tour, Sport, Track
Powertrain
This setting adjusts the throttle
response, gear shifting and engine
performance. An increased throttle
response enhances the acceleration
feel as you move towards Track, but
with a comfort trade-off due to more
aggressive gear shifting.
. Tour, Sport, Track, Snow/Ice

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 189
Brake Response
This setting adjusts the brake pedal
response. Settings range from a slower
response for more comfortable driving
to the quickest response for quicker
deceleration. Brake pedal travel
decreases and caliper pressure
increases as you move from Comfort
to Sport.
.Tour, Sport
Competitive Driving Mode
To select this optional handling mode,
press
Yquickly two times and the
DIC will display COMPETITIVE MODE
ON. While in the Competitive Driving
Mode, the traction off light
iand
StabiliTrak/ESC OFF light
gwill come
on in the instrument cluster. TCS does
not limit wheel spin, the Electronic
Limited-Slip Differential (eLSD) allows
increased vehicle agility, and more
effort is required to turn the steering
wheel. See “Limited-Slip Differential
(V–Series Only)” later in this section.
Adjust your driving accordingly. Press
Yagain, or turn the ignition to
ACC/ACCESSORY and restart the
vehicle, to turn TCS back on. The
traction off light
iand StabiliTrak/
ESC OFF light
gwill go out in the
instrument cluster.
Caution
When traction control is turned off,
or Competitive Driving Mode is
active, it is possible to lose traction.
Performance Traction
Management (PTM)
If equipped, Performance Traction
Management (PTM) integrates the
TCS, StabiliTrak/ESC, and Magnetic
Ride Control systems to provide
improved and consistent performance
when cornering. The amount of
available engine power is based on the
mode selected, track conditions, driver
skill, and the radius of each corner.
This light is on when the vehicle is in
the PTM Mode. To select this optional
handling mode, the vehicle mode
must be in Track. Then quickly press
gon the center console two times.
Performance Traction Wet —ESC On
displays in the DIC.
To experience the performance benefit
of this system, after entering a curve
and at the point where normal
acceleration occurs, fully press the
accelerator pedal. The PTM system
will modify the level of engine power
for a smooth and consistent
corner exit.
The PTM system contains five modes.
These modes are selected by turning
the MODE switch on the center
console. Scroll through modes 1–5 by
turning the mode control dial.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
190 DRIVING AND OPERATING
The following is a DIC display
description and the recommended
usage of each mode:
PTM 1–WET
. Intended for all driver skill levels.
. Wet or damp conditions only —
not intended for use in heavy rain
or standing water.
. StabiliTrak/ESC is on and engine
power is reduced based on
conditions.
PTM 2 –DRY
. For use by less experienced drivers
or while learning a new track.
. Dry conditions only.
. StabiliTrak/ESC is on and engine
power is slightly reduced.
PTM 3 –SPORT 1
. For use by drivers who are familiar
with the track.
. Dry conditions only.
. Requires more driving skill than
mode 2. .
StabiliTrak/ESC is on and more
engine power is available than in
mode 2.
PTM 4 –SPORT 2
. For use by drivers who are familiar
with the track.
. Dry conditions only.
. Requires more driving skill than
modes 2 or 3.
. StabiliTrak/ESC is off and available
engine power is the same as
mode 3.
PTM 5 –RACE
. For use by experienced drivers
who are familiar with the track.
. Dry conditions only.
. Requires more driving skill than in
other modes.
. StabiliTrak/ESC is off and engine
power is available for maximum
cornering speed. Press and releasegto turn off PTM
and return to the TCS and StabiliTrak/
ESC systems. The traction off light
i
and StabiliTrak Off lightiwill
go out.
Launch Control
If equipped, Launch Control is
available within Competitive Driving
Mode and Performance Traction
Management (PTM) to allow high
levels of vehicle acceleration in a
straight line. Launch Control is a form
of traction control that manages tire
spin while launching the vehicle. This
feature is intended for use during
closed course race events where
consistent zero to 60 and quarter mile
times are desirable.
Launch Control is only available when
the following criteria are met:
. Competitive Driving Mode is
selected or any of the Performance
Traction Management modes are
selected. The traction off light
comes on in the instrument
cluster and the appropriate Driver
Information Center (DIC) message
displays.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 191
.The vehicle is not moving.
. The steering wheel is pointing
straight.
Automatic Transmissions
.The brake pedal is firmly pressed
to the floor, equivalent to a panic
brake event.
. The accelerator pedal is rapidly
applied to wide open throttle.
If the vehicle rolls due to wide
open throttle, release the throttle,
press the brake pedal more firmly,
and re-apply the accelerator to
wide open throttle.
Launch Control will initially limit
engine speed as you rapidly apply the
accelerator pedal to wide open
throttle. Allow the engine rpm to
stabilize. A smooth, quick release of
the brake pedal, while maintaining the
fully pressed accelerator pedal, will
manage wheel slip.
After the vehicle is launched, the
system continues in Competitive
Driving Mode or PTM. Competitive Driving Mode, PTM, and
Launch Control are systems designed
for a closed course race track and not
intended for public roads. The systems
are not intended to compensate for
lack of driver experience or familiarity
with the race track.
Limited-Slip Differential
If equipped, the Electronic
Limited-Slip Differential (eLSD) is
automatically activated. eLSD actively
monitors vehicle sensors and driver
inputs to determine the amount of
change for the conditions. With eLSD,
the vehicle has:
.
Enhanced high-speed control.
. Improved traction through
corners, allowing more
acceleration.
. More precise steering.
. Increased vehicle agility.
. Integration with StabiliTrak/
Electronic Stability Control (ESC). For vehicles with eLSD, driven under
severe conditions, the rear axle fluid
should be changed. See
Competitive
Driving Mode 0189 and
Maintenance Schedule 0303.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 221
Fuel
Top Tier Fuel
GM recommends the use of TOP TIER
Detergent Gasoline to keep the engine
clean, reduce engine deposits, and
maintain optimal vehicle performance.
Look for the TOP TIER Logo or see
www.toptiergas.com for a list of TOP
TIER Detergent Gasoline marketers
and applicable countries.
Recommended Fuel (LSY
2.0L L4 Turbo Engine)
Premium unleaded gasoline meeting
ASTM specification D4814 with a
posted octane rating of 93—(R+M)/2
— is highly recommended for best
performance and fuel economy.
Unleaded gasoline with an octane
rated as low as 87 can be used. Using
unleaded gasoline rated below
93 octane, however, will lead to
reduced acceleration and fuel
economy. If knocking occurs, use a
gasoline rated at 93 octane as soon as
possible, otherwise, the engine could
be damaged. If heavy knocking is
heard when using gasoline with a
93 octane rating, the engine needs
service. Do not use any fuel labeled E85 or
FlexFuel. Do not use gasoline with
ethanol levels greater than 15% by
volume.
Recommended Fuel (L3B
2.7L L4 Turbo Engine)
Use premium unleaded gasoline
meeting ASTM specification D4814
with a posted octane rating of 93
—
(R+M)/2. If unavailable, unleaded
gasoline with a posted octane rating
of 91 may be used, but with reduced
performance and fuel economy. If the
octane is less than 91, the engine
could be damaged and the repairs
would not be covered by the vehicle
warranty. If heavy knocking is heard
when using gasoline rated at
93 octane, the engine needs service.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
222 DRIVING AND OPERATING
Do not use any fuel labeled E85 or
FlexFuel. Do not use gasoline with
ethanol levels greater than 15% by
volume.
Prohibited Fuels
Caution
Do not use fuels with any of the
following conditions; doing so may
damage the vehicle and void its
warranty:. For vehicles that are not
FlexFuel, fuel labeled greater
than 15% ethanol by volume,
such as mid-level ethanol
blends (16–50% ethanol), E85,
or FlexFuel.
. Fuel with any amount of
methanol, methylal, ferrocene,
and aniline. These fuels can
corrode metal fuel system
parts or damage plastic and
rubber parts.
(Continued)
Caution (Continued)
.Fuel containing metals such
as methylcyclopentadienyl
manganese tricarbonyl
(MMT), which can damage
the emissions control system
and spark plugs.
. Fuel with a posted octane
rating of less than the
recommended fuel. Using this
fuel will lower fuel economy
and performance, and may
decrease the life of the
emissions catalyst.
Fuels in Foreign Countries
The U.S., Canada, and Mexico post
fuel octane ratings in anti-knock index
(AKI). For fuel not to use in a foreign
country, see Prohibited Fuels 0222.
Fuel Additives
TOP TIER Detergent Gasoline is highly
recommended for use with your
vehicle. If your country does not have
TOP TIER Detergent Gasoline, add ACDelco Fuel System Treatment Plus
−Gasoline to the vehicle’s gasoline fuel
tank at every oil change or 15 000 km
(9,000 mi), whichever occurs first. TOP
TIER Detergent Gasoline and ACDelco
Fuel System Treatment Plus−Gasoline
will help keep your vehicle’s engine
fuel deposit free and performing
optimally.
Filling the Tank
An arrow on the fuel gauge indicates
which side of the vehicle the fuel door
is on. See
Fuel Gauge 096.
{Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
Follow these guidelines to help
avoid injuries to you and others:
. Read and follow all the
instructions on the fuel pump
island.
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 223
Warning (Continued)
.Turn off the engine when
refueling.
. Keep sparks, flames, and
smoking materials away
from fuel.
. Do not leave the fuel pump
unattended.
. Avoid using electronic devices
while refueling.
. Do not re-enter the vehicle
while pumping fuel.
. Keep children away from the
fuel pump and never let
children pump fuel.
. Before touching the fill
nozzle, touch a metallic
object to discharge static
electricity from your body.
. Fuel can spray out if the fill
nozzle is inserted too quickly.
This spray can happen if the
tank is nearly full, and is
more likely in hot weather.
(Continued)
Warning (Continued)
Insert the fill nozzle slowly
and wait for any hiss noise to
stop before beginning to
flow fuel.
To open the fuel door, push and
release the rearward center edge of
the door.
The capless refueling system does not
have a fuel cap. Fully insert and latch
the fill nozzle, begin fueling.
{Warning
Overfilling the fuel tank by more
than three clicks of a standard fill
nozzle may cause:
. Vehicle performance issues,
including engine stalling and
damage to the fuel system.
. Fuel spills.
. Under certain conditions, fuel
fires.
Be careful not to spill fuel. Wait
five seconds after you have finished
pumping before removing the fill
nozzle. Clean fuel from painted
surfaces as soon as possible. See
Exterior Care 0293. Push the fuel door
closed until it latches.
{Warning
If a fire starts while you are
refueling, do not remove the fill
nozzle. Shut off the flow of fuel by
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 225
Trailer Towing
General Towing
Information
Only use towing equipment that has
been designed for the vehicle. Contact
your dealer or trailering dealer for
assistance with preparing the vehicle
to tow a trailer. Read the entire
section before towing a trailer. To tow
a disabled vehicle, seeTowing the
Vehicle 0291. To tow the vehicle
behind another vehicle such as a
motor home, see Recreational Vehicle
Towing 0292.
When towing with the 2.0L L4 engine,
only use unleaded gasoline with an
octane rating of 89 or higher. Using
gasoline with a lower octane rating
while towing may damage the engine
and may not be covered by the vehicle
warranty. See Recommended Fuel (LSY
2.0L L4 Turbo Engine) 0221 or
Recommended Fuel (L3B 2.7L L4 Turbo
Engine) 0221.
Driving Characteristics and
Towing Tips
{Warning
You can lose control when towing a
trailer if the correct equipment is
not used or the vehicle is not driven
properly. For example, if the trailer
is too heavy or the trailer brakes are
inadequate for the load, the vehicle
may not stop as expected. You and
others could be seriously injured.
The vehicle may also be damaged,
and the repairs would not be
covered by the vehicle warranty.
Pull a trailer only if all the steps in
this section have been followed. Ask
your dealer for advice and
information about towing a trailer
with the vehicle.
Driving with a Trailer
Trailering is different than just driving
the vehicle by itself. Trailering means
changes in handling, acceleration,
braking, durability, and fuel economy. Successful, safe trailering takes correct
equipment, and it has to be used
properly.
The following information has many
time-tested, important trailering tips
and safety rules. Many of these are
important for your safety and that of
your passengers. Read this section
carefully before pulling a trailer.
When towing a trailer:
.
Become familiar with and follow
all state and local laws that apply
to trailer towing. These
requirements vary from state to
state.
. State laws may require the use of
extended side view mirrors. Even if
not required, you should install
extended side view mirrors if your
visibility is limited or restricted
while towing.
. Do not tow a trailer during the
first 800 km (500 mi) of vehicle
use to prevent damage to the
engine, axle, or other parts.
. It is recommended to perform the
first oil change before heavy
towing.