2020 CADILLAC CT4 engine

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 177
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 next higher 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.
When accelerating the vehicle from a
stop in snowy and icy conditions, it is
suggested to shift into second gear.
A higher gear allows the vehicle to
gain more traction on slippery
surfaces.Manual Mode (Electronic
Shifter)
Tap ShiftCaution
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.
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.
2. After releasing the shift lever, it will return to the center position.
3. Press the controls on the back of the steering wheel to shift. Use
the left steering wheel control to
downshift, and the right control
to upshift. To shift to the lowest
available gear, press and hold the
left control.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
178 DRIVING AND OPERATING
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) before shifting back to
D (Drive).
Temporary Tap Manual 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 manual shift
mode, allowing the transmission
to be manually shifted. 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, a SHIFT
DENIED message will be displayed 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.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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 179
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. SeeAntilock
Brake System (ABS) Warning Light
0 103.
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 vehicle has an Electric Parking
Brake (EPB). The EPB can always be
activated, even if the ignition is off. To
prevent draining the battery, avoid
repeated cycles of the EPB system
when the engine is not running.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
182 DRIVING AND OPERATING
When Automatic Vehicle Hold (AVH)
is turned on and the vehicle is braked
to a stop, AVH prevents the vehicle
from moving during the transition
from brake pedal release to accelerator
pedal apply. The brakes release when
the accelerator pedal is applied. The
brakes may also release under other
conditions. Do not rely on AVH to
hold the vehicle.
If the accelerator pedal is not applied
within a few minutes, the Electric
Parking Brake will apply. The parking
brake will also apply if the driver door
is opened or the driver seat belt is
unfastened while AVH is holding the
vehicle.
AVH can be turned on by pressing
AUTO HOLD. The indicator light on
the switch will come on. The AVH
light on the instrument panel will
come on while AVH is actively holding
the vehicle. SeeAutomatic Vehicle Hold
(AVH) Light 0103.Ride Control Systems
Traction Control/Electronic
Stability Control
The vehicle has a Traction Control
System (TCS) and StabiliTrak/
Electronic Stability Control (ESC).
These systems help limit wheel slip
and assist the driver in maintaining
control, especially on slippery road
conditions.
TCS activates if it senses that any of
the drive wheels are spinning or
beginning to lose traction. When this
happens, the system brakes the
spinning wheel(s) and/or reduces
engine power to limit wheel spin.
StabiliTrak/ESC activates when the
computer senses a difference between
the intended path and the direction
the vehicle is actually traveling.
StabiliTrak/ESC selectively applies
braking pressure at any one of the
vehicle's brakes to help steer the
vehicle in the intended direction. If cruise control is being used and TCS
or StabiliTrak/ESC begins to limit
wheel spin, cruise control will
disengage. Cruise control may be
turned back on when road conditions
allow.
Both systems come on automatically
when the vehicle is started and begins
to move. The systems may be heard or
felt while they are operating or while
performing diagnostic checks. This is
normal and does not mean there is a
problem with the vehicle.
It is recommended to leave both
systems on for normal driving
conditions, but It may be necessary to
turn TCS off if the vehicle gets stuck
in sand, mud, ice, or snow. See
If the
Vehicle Is Stuck 0153 and “Turning
the Systems Off and On ”later in this
section.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 183
The indicator light for both systems is
in the instrument cluster. This
light will:
.Flash when TCS is limiting
wheel spin.
. Flash when StabiliTrak/ESC is
activated.
. Turn on and stay on when either
system is not working.
If either system fails to turn on or to
activate, a message may display in the
Driver Information Center (DIC), and
dcomes on and stays on to indicate
that the system is inactive and is not
assisting the driver in maintaining
control. The vehicle is safe to drive,
but driving should be adjusted
accordingly.
If
dcomes on and stays on:
1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds.
3. Start the engine. Drive the vehicle. if
dcomes on and
stays on, the vehicle may need more
time to diagnose the problem. If the
condition persists, see your dealer.
Turning the Systems Off and On
Caution
Do not repeatedly brake or
accelerate heavily when TCS is off.
The vehicle driveline could be
damaged. To turn off only TCS, press and
release
g. The traction off lighti
displays in the instrument cluster.
A DIC message may display.
To turn TCS on again, press and
release
g. The traction off lighti
displayed in the instrument cluster
will turn off.
If TCS is limiting wheel spin when
g
is pressed, the system will not turn off
until the wheels stop spinning.
To turn off both TCS and StabiliTrak/
ESC, press and hold
guntil the
traction off light
iand StabiliTrak/
ESC OFF light
gcome on and stay on
in the instrument cluster. A DIC
message may display.
To turn TCS and StabiliTrak/ESC on
again, press and release
g. The
traction off light
iand StabiliTrak/
ESC OFF light
gin the instrument
cluster turn off.
Adding accessories can affect the
vehicle's performance. See Accessories
and Modifications 0235.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 185
Tour Mode
Use for normal city and highway
driving to provide a smooth, soft ride.
This setting provides a balance
between comfort and handling. This is
the standard mode, and when
selected, no persistent indicator will
display. For further details on Tour
Mode see Driver Mode Selector
Attributes Affected.
Sport Mode
Use where road conditions or personal
preference demand a more controlled
response.
When selected, the Sport Mode
indicator will display.
In this mode, the vehicle monitors
driving behaviors and automatically
enables Performance Shift Features
when spirited driving is detected.
These features maintain lower
transmission gears to increase
available engine braking and improve
acceleration response. The vehicle will
exit this feature and return to normal
operation after a short period when no
spirited driving is detected. Thesteering will change to provide more
precise control. If the vehicle has
Magnetic Ride Control, the suspension
will change to provide better
cornering performance.
Competitive Driving Mode can be
accessed through this mode. See
Competitive Driving Mode
0189.
For further details on Sport Mode, see
Driver Mode Selector Attributes
Affected.Snow/Ice Mode
Use when more traction is needed
during slippery conditions.
Snow/Ice Mode will use a different
accelerator pedal map to optimize
traction on a slippery surface. The
accelerator pedal will reduce engine
torque at small pedal inputs.
When selected, the Snow/Ice Mode
indicator will display.
This feature is not intended for use
when the vehicle is stuck in sand,
mud, ice, snow, or gravel. If the
vehicle becomes stuck, see If the
Vehicle Is Stuck 0153. For further details on Snow/Ice Mode,
see Driver Mode Selector Attributes
Affected.
Track Mode ( V-Series Only)
Use when maximum vehicle handling
is desired. For use when driving on a
closed race course or a drag strip.
When selected, the Track Mode
indicator will display.
When in Track Mode, the automatic
transmission and steering will
function similar to Sport Mode. The
accelerator pedal is adjusted to give
maximum control during the highest
level of spirited driving. The Magnetic
Ride Control will be set to the
optimum level for vehicle
responsiveness. Performance Traction
Management (PTM) can be accessed
through this mode. See Performance
Traction.
For further details on Track Mode, see
Driver Mode Selector Attributes
Affected.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
186 DRIVING AND OPERATING
My Mode
My Mode is used to personalize
everyday driving. This mode is
designed to allow the diver to
configure vehicle sub-systems to their
own preference for city and normal
driving.
Through the center display, the
following vehicle sub-systems may be
available for customization in
this mode:
.Engine Sound: Stealth, Tour
(Default), Sport, Track
. Steering: Tour (default), Sport,
Track
. Suspension: Tour (default), Sport,
Track
. Brake Response: Tour (default),
Sport
For information on the range of
settings, see Driver Mode
Customization.
V-Mode (V-Series Only)
V-Mode is used to personalize
dynamic driving. This mode is
designed to allow the driver to
configure vehicle sub-systems to their
own preference for maximum
handling. V-Mode further enhances
the drivers experience by adding a
powertrain customization.
Through the center display, the
following vehicle sub-systems may be
available for customization in
this mode:
. Engine Sound: Stealth, Tour
(Default), Sport, Track
. Steering: Tour (default), Sport,
Track
. Suspension: Tour (default), Sport,
Track
. Brake Response: Tour (default),
Sport
For information on the range of
settings, see Driver Mode
Customization. There are six attributes that vary by
mode shown below. Not all vehicles
have all features, depending on the
vehicle option.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
DRIVING AND OPERATING 187
Modes:TOUR
Default SPORT TRACK WEATHER
Powertrain TourSport Track Snow/Ice
Throttle Progression TourTourTrack Snow/Ice
Transmission Shift Mode TourSport Track Snow/Ice
Engine Sound TourSport Track Tour
Steering TourSport Track Tour
Suspension (if equipped with Magnetic Ride
Control) Tour
Sport Track Tour
Traction and Stability Control TourSport Track Tour
Competitive Driving Mode (if equipped) Not Available Available Not Available Not Available
Performance Traction Mode (if equipped) Not Available Not Available Available Not Available
Brake Response TourSport Sport Tour
Driver Mode Selector Attributes
Affected
Throttle Progression
Adjusts throttle sensitivity by
selecting how quick or slow the
throttle reacts to input. .
Snow/Ice - The accelerator pedal
will reduce engine torque at small
pedal inputs. This allows better
wheel control on slippery surfaces.
. Track - The accelerator pedal is
adjusted to give maximum control
during the highest level of spirited
driving. Transmission Shift Mode
Sport or Track Dynamic Performance
Mode (DPM) allows the transmission
to hold the current gear after a quick
release of a heavily applied accelerator
pedal. This provides greater engine
braking and enhanced vehicle control
without using the paddles. DPM
recognizes aggressive cornering, heavy