service CADILLAC CT6 2020 Owner's Guide

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
DRIVING AND OPERATING 177
Hydroplaning
Hydroplaning is dangerous. Water can
build up under the vehicle's tires so
they actually ride on the water. This
can happen if the road is wet enough
and you are going fast enough. When
the vehicle is hydroplaning, it has
little or no contact with the road.
There is no hard and fast rule about
hydroplaning. The best advice is to
slow down when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet
weather driving tips include:
.Allow extra following distance.
. Pass with caution.
. Keep windshield wiping equipment
in good shape.
. Keep the windshield washer fluid
reservoir filled.
. Have good tires with proper tread
depth. See Tires0315.
. Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving on
flat or rolling terrain. Tips include:
.Keep the vehicle serviced and in
good shape.
. Check all fluid levels and brakes,
tires, cooling system, and
transmission.
. Shift to a lower gear when going
down steep or long hills.
{Warning
Using the brakes to slow the vehicle
on a long downhill slope can cause
brake overheating, can reduce brake
performance, and could result in a
loss of braking. Shift the
transmission to a lower gear to let
the engine assist the brakes on a
steep downhill slope.
{Warning
Coasting downhill in N (Neutral) or
with the ignition off is dangerous.
This can cause overheating of the
brakes and loss of steering assist.
Always have the engine running
and the vehicle in gear.
. Drive at speeds that keep the
vehicle in its own lane. Do not
swing wide or cross the
center line.
. Be alert on top of hills; something
could be in your lane (e.g., stalled
car, crash).
. Pay attention to special road signs
(e.g., falling rocks area, winding
roads, long grades, passing or
no-passing zones) and take
appropriate action.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
178 DRIVING AND OPERATING
Winter Driving
Driving on Snow or Ice
Snow or ice between the tires and the
road creates less traction or grip, so
drive carefully. Wet ice can occur at
about 0 °C (32 °F) when freezing rain
begins to fall. Avoid driving on wet ice
or in freezing rain until roads can be
treated.
For slippery road driving:
.Accelerate gently. Accelerating too
quickly causes the wheels to spin
and makes the surface under the
tires slick.
. Turn on Traction Control. See
Traction Control/Electronic Stability
Control 0203.
. Antilock Brake System (ABS)
improves vehicle stability during
hard stops, but the brakes should
be applied sooner than when on
dry pavement. See Antilock Brake
System (ABS) 0199.
See Driver Mode Control 0204. .
Allow greater following distance
and watch for slippery spots. Icy
patches can occur on otherwise
clear roads in shaded areas. The
surface of a curve or an overpass
can remain icy when the
surrounding roads are clear. Avoid
sudden steering maneuvers and
braking while on ice.
. Turn off cruise control.
Blizzard Conditions
Stop the vehicle in a safe place and
signal for help. Stay with the vehicle
unless there is help nearby. If possible,
use Roadside Service. See Roadside
Service 0380. To get help and keep
everyone in the vehicle safe:
. Turn on the hazard warning
flashers.
. Tie a red cloth to an outside
mirror.
{Warning
Snow can trap engine exhaust
under the vehicle. This may cause
exhaust gases to get inside. Engine
exhaust contains carbon monoxide
(CO), which cannot be seen or
smelled. It can cause
unconsciousness and even death.
If the vehicle is stuck in snow:
. Clear snow from the base of
the vehicle, especially any
blocking the exhaust pipe.
. Open a window about 5 cm
(2 in) on the vehicle side that
is away from the wind, to
bring in fresh air.
. Fully open the air outlets on
or under the instrument
panel.
. Adjust the climate control
system to circulate the air
inside the vehicle and set the
(Continued)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
DRIVING AND OPERATING 185
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 when the ignition
is on, but the vehicle will not be able
to be driven. The engine will not start
in Service Mode. Press ENGINE
START/STOP again to turn the
ignition off.
Starting the Engine
Shift to P (Park) or N (Neutral). To
restart the engine when the vehicle 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 the transmission.
Shift to P (Park) only when the
vehicle is stopped.
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 Equipment0269.
Starting Procedure 1. With the Keyless Access system, the Remote Keyless Entry (RKE)
transmitter must be in the
vehicle. Press ENGINE START/
STOP with the brake pedal
applied. When the engine begins
cranking, let go of the button. The idle speed will go down as
the engine gets warm. Do not
race the engine immediately
after starting it.
If the RKE transmitter is not in
the vehicle, if there is
interference, or if the RKE
battery is low, a Driver
Information Center (DIC) will
display a message. See
Remote
Keyless Entry (RKE) System
Operation 010.
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

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
DRIVING AND OPERATING 189
2. Press the button on top of theshift lever to shift into P (Park).
See Automatic Transmission
0 193.
3. The P indicator on the shift lever will turn red when the vehicle is
in P (Park).
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
(Continued)
Warning (Continued)
the parking brake and shift
to P (Park). SeeShifting Into Park
0 188. If you are towing a trailer,
see Driving Characteristics and
Towing Tips 0262.
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 0262.
Shifting out of Park
This vehicle is equipped with an
electronically controlled transmission.
The shift lock release button is
designed to prevent inadvertent
shifting out of P (Park) unless the
ignition is on, the brake pedal is
applied, and the shift lock release
button is pressed. The shift lock control is always
functional except in the case of an
uncharged or low voltage (less than
9-volt) battery.
If the vehicle has an uncharged
battery or a battery with low voltage,
try charging or jump starting the
battery. See
Jump Starting - North
America 0343.
To shift out of P (Park): 1. Ensure the engine is running.
2. Apply the brake pedal.
3. Press the shift lock release button.
4. Move the shift lever to the desired position.
5. The P indicator will turn white and the gear indicator on the
shift lever 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 the vehicle cannot shift from
P (Park), a Driver Information
Center (DIC) message will be
displayed. See your dealer for service.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
190 DRIVING AND OPERATING
Manual Park Release
{Warning
The transmission will be placed in
N (Neutral) when the manual park
release is pulled. The vehicle can
roll and you or others could be
injured. Ensure the vehicle is on
level ground.
Caution
The manual park release is not
intended to be used for towing.
Damage may result from using the
manual park release in this way.
The repairs would not be covered
by the vehicle warranty.
The manual park release can be used
to shift the vehicle into N (Neutral)
when the engine is not running.
If the manual park release is pulled
while the vehicle is on or if the
ignition is turned on while the manual park release is pulled, the DIC will
display a message to service the
transmission.
To place the vehicle in N (Neutral)
using the manual park release:
1. Ensure the vehicle is on level ground and set the parking
brake.
2. Turn the vehicle off.
3. Use a flat-bladed tool to remove the interior trim panel on the
center console to the right of the
accelerator pedal.
4. Pull the carpet back to expose the manual park release lever. 5. Ensure more than one minute
has elapsed since Step 2. Apply
the brake pedal.
6. Pull the manual park release
lever 90° to its latching position.
7. With the brake pedal released, place the ignition in ACC/
ACCESSORY. Then apply the
brake pedal and release the
parking brake.
To return the vehicle to P (Park) using
the manual park release: 1. Bring the vehicle to a complete stop.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
194 DRIVING AND OPERATING
This vehicle is equipped with an
electronic controlled transmission.
The shift lock release button is
designed to prevent inadvertent
shifting out of P (Park) unless the
ignition is on, the brake pedal is
applied, and the shift lock release
button is pressed.
When the vehicle is stopped, press
ENGINE START/STOP to turn off the
vehicle. The transmission will shift to
P (Park) automatically, unless the
vehicle is in N (Neutral). See“Car
Wash Mode ”later in this section. The vehicle will not shift into P (Park)
if it is moving too fast. Stop the
vehicle and shift into P (Park).
To shift in and out of P (Park), see
Shifting Into Park
0188 and
Shifting out of Park 0189.
Service Shift Lever Message
If the message SERVICE SHIFTER SEE
OWNER’S MANUAL appears in the
Driver Information Center (DIC), the
shift lever needs service. Have the
vehicle serviced as soon as possible.
If the vehicle is automatically shifting
into P (Park), check to see if the
P (Park) button on top of the shift
lever is stuck. To operate the vehicle,
hold the shift lever in the desired gear,
R (Reverse) or D (Drive), until vehicle
speed exceeds 15 km/h (10 mph), then
release the shift lever.
R : Use this gear to back up.
If the vehicle is shifted from either
R (Reverse) to D (Drive), or D (Drive)
or M (Manual Mode) to R (Reverse)
while the speed is too high, the
vehicle will shift to N (Neutral).
Reduce the vehicle speed and try the
shift again. To shift into R (Reverse):
1. Bring the vehicle to a complete stop.
2. Press and hold shift lock release button on the side of the shift
lever.
3. From the center position, move the shift lever forward through
the first detent to the end of
travel. R is illuminated in red.
4. After releasing the shift lever, it will return to the center position.
To shift out of R (Reverse):
1. Bring the vehicle to a complete stop.
2. Shift to the desired gear.
3. After releasing the shift lever, it will return to the center position.
At low vehicle speeds, R (Reverse) can
be used to rock the vehicle back and
forth to get out of snow, ice, or sand
without damaging the transmission.
See If the Vehicle Is Stuck 0179.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
200 DRIVING AND OPERATING
Using ABS
Do not pump the brakes. Just hold the
brake pedal down firmly and let ABS
work. You may hear the ABS pump or
motor operating and feel the brake
pedal pulsate. This is normal.
When ABS is active, it may be an
indication that road surfaces are
slippery. Braking sooner may be
required for driving conditions.
If equipped with electric brake boost,
the TCS/StabiliTrak/ESC light will
flash when ABS is active.
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.
The system has a
Yor PARK
Electric Parking Brake light, and a
8
Service Parking Brake light. See
Electric Parking Brake Light 0125 and
Service Electric Parking Brake Light
0 126. Before leaving the vehicle, check for
the
Yor PARK 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
Yor PARK light will flash and
then stay on once the EPB is fully
applied. If the
Yor PARK light
flashes continuously, then the EPB is
only partially applied or there is a
problem with the EPB. A DIC message
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
Yor PARK light is
flashing. See your dealer. See Electric
Parking Brake Light 0125.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
DRIVING AND OPERATING 219
vehicles in different lanes, signs,
guardrails, and other stationary
objects when entering or exiting a
curve. This is normal operation. The
vehicle does not need service.
Other Vehicle Lane Changes
ACC will not detect a vehicle ahead
until it is completely in the lane. The
brakes may need to be manually
applied.Do Not Use ACC on Hills and When
Towing a Trailer
Do not use ACC when driving on steep
hills or when towing a trailer. For
towing capability, see
Trailer Towing
0 266. ACC will not detect a vehicle in
the lane while driving on steep hills.
The driver will often need to take over
acceleration and braking on steep
hills, especially when towing a trailer.
If the brakes are applied, the ACC
disengages.
Disengaging ACC
There are three ways to
disengage ACC:
. Step lightly on the brake pedal.
. Press
*. .
Press
J.
Erasing Speed Memory
The ACC set speed is erased from
memory if
Jis pressed or if the
ignition is turned off.
Cleaning the Sensing System
The camera sensor on the windshield
behind the rearview mirror and the
radar sensors on the front of the
vehicle can become blocked by snow,
ice, dirt, or mud. These areas need to
be cleaned for ACC to operate
properly.
If ACC will not operate, regular cruise
control may be available. See
“Switching Between ACC and Regular
Cruise Control ”previously in this
section. Always consider driving
conditions before using either cruise
control system.
For cleaning instructions, see
“Washing the Vehicle ”under Exterior
Care 0349.
System operation may also be limited
under snow, heavy rain, or road spray
conditions.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
220 DRIVING AND OPERATING
Super Cruise
If equipped, Super Cruise can steer to
maintain lane position under certain
conditions on compatible highways
that are separated from opposing
traffic.
{Warning
Super Cruise can only assist to
maintain lane position when driving
on compatible highways. You must
supervise the driving task and
monitor the freeway conditions.
You may need to respond to traffic
events by steering, braking,
or accelerating. SeeDefensive
Driving 0173.
Super Cruise is: . Not a self-driving system.
. Not a crash avoidance or
warning system.
. Not a substitute for proper
supervision of the
driving task. Super Cruise uses the following to
detect the current lane position and
lane markings ahead on compatible
highways under certain conditions:
.
Cameras
. Global Positioning System (GPS)
sensing
. A high-precision map
. GPS-enhancement data
downloaded through OnStar
Super Cruise works with Adaptive
Cruise Control (ACC), which controls
acceleration and braking while Super
Cruise is enabled and operating.
Review and understand both this
section and the ACC section before
using Super Cruise. See Adaptive
Cruise Control 0211.
An active OnStar or connected service
plan that includes Emergency Services
is required to use Super Cruise.
{Warning
Super Cruise does not perform all
aspects of driving, nor does it do
everything a driver can do. Super
Cruise only steers to maintain lane
position. Super Cruise can only be
used with Adaptive Cruise Control.
Super Cruise does: . Not prevent crashes or warn
of possible crashes.
. Not steer to avoid stopped or
slow-moving vehicles,
construction barriers or
cones, motorcycles, children,
pedestrians, animals, or other
objects on the freeway.
. Not steer in response to
vehicles or objects next to
your vehicle, including
vehicles attempting to enter
your lane.
. Not change lanes.
. Not steer to merge onto or to
exit freeways.
(Continued)

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-13566829) -
2020 - CRC - 6/14/19
222 DRIVING AND OPERATING
Warning (Continued)
.Not in adverse weather
conditions, including rain,
sleet, fog, ice, or snow.
. Not on winding or hilly roads.
. Not for city driving.
. Not during heavy or
emergency braking.
. Not on surface streets.
. Not on a road shoulder,
service drive, or under an
elevated freeway.
. Not in tunnels.
. Not when towing a trailer.
. Not in a freeway exit lane. When Super Cruise is Available
Super Cruise Indicator
Super Cruise is designed to operate
only when:
. ACC is on. See Adaptive Cruise
Control 0211.
. Automatic Emergency Braking is
on. See Automatic Emergency
Braking (AEB) 0246.
. Teen Driver is not active.
. The GPS detects the vehicle is on
a compatible highway.
. Both the camera and the radar
sensors are functioning and not
covered, obstructed, or damaged.
. The Driver Attention System
(DAS) detects the driver's head
and eyes are directed toward
the road. .
The lane markings are clearly
visible and able to be detected by
the system.
Poor Conditions
Poor Conditions