2017 CADILLAC CT6 service

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
148 INSTRUMENTS AND CONTROLS
SERVICE SIDE DETECTION
SYSTEM
If this message remains on after
continued driving, the vehicle needs
service. Take the vehicle to your
dealer. Side Blind Zone Alert (SBZA),
Lane Change Alert (LCA), and Rear
Cross Traffic Alert (RCTA) features
will not work.
SIDE DETECTION SYSTEM
UNAVAILABLE
This message indicates that Side Blind
Zone Alert (SBZA), Lane Change Alert
(LCA), and Rear Cross Traffic Alert
(RCTA) are disabled either because the
sensor is blocked and cannot detect
vehicles in the blind zone, or the
vehicle is passing through an open
area, such as the desert, where there
is insufficient data for operation. This
message may also activate during
heavy rain or due to road spray. The
vehicle does not need service. For
cleaning, see "Washing the Vehicle"
underExterior Care 0301.
TAKE STEERING
If LKA does not detect active driver
steering, an alert and chime may be
provided. Move the steering wheel to
dismiss. See Lane Keep Assist
(LKA) 0238.
Ride Control System
Messages
SERVICE ALL WHEEL DRIVE
This message displays when there is a
problem with the AWD system. This
message could be set by a number of
issues, such as:
.
A vehicle or an AWD system
electronics problem.
. Various vehicle electrical issues.
. Worn out or overheated AWD
clutch plates.
. Loss of fluids.
Some of these issues may require
service of the AWD system.
If this message appears, stop when it
is safe to do so and turn off the
ignition for 30 seconds. Restart the
vehicle and check for the message on the DIC display. If the message does
not appear, it is not necessary to take
the vehicle to your dealer.
SERVICE STABILITRAK
This message displays if there is a
problem with the StabiliTrak system.
See
Traction Control/Electronic Stability
Control 0208.
SERVICE TRACTION CONTROL
This message displays when there is a
problem with the Traction Control
System (TCS). See Traction Control/
Electronic Stability Control 0208.
TRACTION CONTROL OFF
This message displays when the
Traction Control System (TCS) has
been turned off. See Traction Control/
Electronic Stability Control 0208.
TRACTION CONTROL ON
This message displays when the
Traction Control System (TCS) has
been turned on. See Traction Control/
Electronic Stability Control 0208.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INSTRUMENTS AND CONTROLS 149
Airbag System Messages
SERVICE AIRBAG
This message displays if there is a
problem with the airbag system. See
your dealer for service.
Safety Belt Messages
AUTOMATIC SEATBELT
TIGHTENING UNAVAILABLE
This message displays when the
Automatic Safety Belt Tightening
System, if equipped, becomes
unavailable. This could be caused by a
temporary condition. If the message
continues to display, see your dealer.
SERVICE AUTOMATIC SEATBELT
TIGHTENING SYSTEM
If this message displays, take the
vehicle to your dealer to repair the
Automatic Safety Belt Tightening
System, if equipped.
Security Messages
THEFT ATTEMPTED
This message displays if the vehicle
detects a tamper condition.
Service Vehicle Messages
SERVICE POWER STEERING
This message displays and a chime
may sound when there may be a
problem with the power steering
system. If this message displays and a
reduction in steering performance or
loss of power steering assistance is
noticed, see your dealer.
SERVICE VEHICLE SOON
This message is displayed if there is a
problem with the vehicle. Take the
vehicle to your dealer for service.
Steering System Messages
ACTION REQUIRED TURN
STEERING WHEEL START
VEHICLE AGAIN
This message displays to indicate that
the steering column lock device was
unable to unlock the column, and the
engine did not start. If this happens,
immediately turn the steering wheel
from side to side. If that does not
unlock the steering column, turn the
ignition off, and then open the driver
door. Then turn the vehicle back on
and turn the steering wheel from side
to side for about 15 seconds. The
steering column must be turned to
each side immediately after pressing
ENGINE START/STOP to help the
steering column lock device unlock
the column. In some situations it may
take significant force. This situation
may be avoided by straightening the
front wheels before turning off the
engine.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
150 INSTRUMENTS AND CONTROLS
SERVICE ACTIVE STEERING
SYSTEM
This message displays when the
Active Rear Steer system does not
respond correctly to steering inputs.
The rear wheels may remain at an
off-center position and the driver may
need to apply a small steering wheel
correction for the vehicle going
forward. If the problem persists for
the next ignition cycle, see your dealer
for service.
SERVICE STEERING
COLUMN LOCK
This message displays when a
problem with the steering column lock
device has been detected. See your
dealer for service.
STEERING COLUMN LOCKED
This message displays when the
steering column is locked with the
engine running. It is normal for the
steering column to be locked during a
remote start. The steering column
should unlock after the brake pedal
and ENGINE START/STOP are
pressed.
Starting the Vehicle
Messages
PRESS BRAKE TO START
This message is displayed when
attempting to start the vehicle
without first pressing the brake pedal.
SERVICE KEYLESS START
SYSTEM
This message is displayed if there is a
problem with the pushbutton start
system. Take the vehicle to your
dealer for service.
Tire Messages
SERVICE TIRE MONITOR SYSTEM
This message displays if there is a
problem with the Tire Pressure
Monitor System (TPMS). SeeTire
Pressure Monitor Operation 0281.
TIRE LEARNING ACTIVE
This message displays when the
system is learning new tires. See Tire
Pressure Monitor Operation 0281.
TIRE PRESSURE LOW ADD AIR
TO TIRE
This message displays when the
pressure in one or more of the tires
is low.
This message also displays LEFT
FRONT, RIGHT FRONT, LEFT REAR,
or RIGHT REAR to indicate the
location of the low tire.
The low tire pressure warning light
will also come on. See Tire Pressure
Light 0133.
If a tire pressure message appears on
the DIC, stop as soon as possible.
Inflate the tires by adding air until the
tire pressure is equal to the values
shown on the Tire and Loading
Information label. See Tires0276,
Vehicle Load Limits 0191, and Tire
Pressure 0279.
More than one tire pressure message
can appear at a time. The DIC also
shows the tire pressure values. See
Driver Information Center (DIC) 0136.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INSTRUMENTS AND CONTROLS 151
Transmission Messages
SERVICE TRANSMISSION
This message displays if there is a
problem with the transmission. See
your dealer.
SHIFT DENIED
This message displays when using
Manual Mode and attempting to shift
to a gear not appropriate for the
vehicle speed and engine revolutions
per minute (rpm). SeeManual
Mode 0203.
SHIFT TO PARK
This message displays when the
transmission needs to be shifted to
P (Park). This may appear when
turning the ignition off if the vehicle
is not in P (Park).
TRANSMISSION HOT —IDLE
ENGINE
This message displays and a chime
sounds if the transmission fluid in the
vehicle gets hot. Driving with the
transmission fluid temperature high
can cause damage to the vehicle. Stop
the vehicle and let it idle to allow the transmission to cool. This message
clears when the fluid temperature
reaches a safe level.
Vehicle Reminder
Messages
ICE POSSIBLE DRIVE WITH CARE
This message displays when ice
conditions are possible.
Vehicle Speed Messages
SPEED LIMIT EXCEEDED
This message is displayed when the
vehicle speed is greater than the set
speed. See
“Speed Warning” under
Driver Information Center (DIC) 0136.
VEHICLE OVERSPEED
This message displays when the
vehicle speed exceeds 120 km/h
(75 mph).
Washer Fluid Messages
WASHER FLUID LOW ADD FLUID
This message may display when the
washer fluid level is low. Fill the
windshield washer reservoir as soon
as possible. See Engine Compartment
Overview 0247 for the location of the
windshield washer reservoir. Also, see
Washer Fluid 0260.
Window Messages
OPEN, THEN CLOSE DRIVER/
PASSENGER WINDOW
This message is displayed when the
window needs to be reprogrammed.
If the vehicle's battery has been
discharged or disconnected, you may
need to program each front window
for the express-up feature to work. See
Power Windows 049.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
CLIMATE CONTROLS 171
Climate Controls
Climate Control Systems
Automatic Climate ControlSystem (Quad Zone) . . . . . . . . . . . . 171
Automatic Climate Control System (Dual Zone) . . . . . . . . . . . . 178
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Climate Control Systems
Automatic Climate Control System (Quad Zone)
The climate control buttons and the touch screen are used to adjust the heating,
cooling, and ventilation.
Climate Control Buttons
1. Driver and Passenger Temperature Controls
2. Fan Control
3. Driver and Passenger Heated and Ventilated Seats (If Equipped)
4. Rear Window Defogger
5. Defrost 6. OFF (Fan)
7. Recirculation
8. AUTO (Automatic Operation)

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
CLIMATE CONTROLS 183
Operation Tips
.Clear away any ice, snow, or leaves
from air inlets at the base of the
windshield that could block the
flow of air into the vehicle.
. Keep the path under the front
seats clear of objects to help
circulate the air inside of the
vehicle more effectively.
. Use of non-GM approved hood
deflectors can adversely affect the
performance of the system. Check
with your dealer before adding
equipment to the outside of the
vehicle.
. Do not attach any devices to the
air vent slats. This restricts airflow
and may cause damage to the air
vents.Maintenance
Passenger Compartment
Air Filter
The filter reduces dust, pollen, and
other airborne irritants from outside
air that is pulled into the vehicle. The
filter should be replaced as part of
routine scheduled maintenance. See
Maintenance Schedule 0311.
See your dealer regarding replacement
of the filter.
Service
All vehicles have a label underhood
that identifies the refrigerant used in
the vehicle. The refrigerant system
should only be serviced by trained and
certified technicians. The air
conditioning evaporator should never
be repaired or replaced by one from a
salvage vehicle. It should only be
replaced by a new evaporator to
ensure proper and safe operation.
During service, all refrigerants should
be reclaimed with proper equipment.
Venting refrigerants directly to the
atmosphere is harmful to the
environment and may also create
unsafe conditions based on inhalation,
combustion, frostbite, or other
health-based concerns.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
188 DRIVING AND OPERATING
to a lower gear. Any sudden
changes could cause the tires to
slide.
Remember: Antilock brakes help avoid
only the braking skid.
Driving on Wet Roads
Rain and wet roads can reduce vehicle
traction and affect your ability to stop
and accelerate. Always drive slower in
these types of driving conditions and
avoid driving through large puddles
and deep-standing or flowing water.
{Warning
Wet brakes can cause crashes. They
might not work as well in a quick
stop and could cause pulling to one
side. You could lose control of the
vehicle.
After driving through a large puddle
of water or a car/vehicle wash,
lightly apply the brake pedal until
the brakes work normally. (Continued)
Warning (Continued)
Flowing or rushing water creates
strong forces. Driving through
flowing water could cause the
vehicle to be carried away. If this
happens, you and other vehicle
occupants could drown. Do not
ignore police warnings and be very
cautious about trying to drive
through flowing water.
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 Tires0276.
. 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
196 DRIVING AND OPERATING
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 in five seconds.
ACC/ACCESSORY (Amber Indicator
Light) :This mode allows you to use
some electrical accessories when the
engine is off.
With the ignition off, pressing the
button one time without the brake
pedal applied will place the ignition
system in ACC/ACCESSORY.
The ignition will switch from ACC/
ACCESSORY 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 begins, release the
button. Engine cranking will continue
until the engine starts. See Starting the
Engine 0196. The ignition will then
remain in ON/RUN. Service Only 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 the button for more than
five seconds will place the vehicle in
Service Only 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 Only Mode.
Press the button again to turn the
vehicle off.
Starting the Engine
Move the shift lever 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 Equipment
0243.
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.