service CADILLAC CT6 2016 Owner's Guide

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
148 Instruments and Controls
Compass Messages The compass display will be blank if
the vehicle temporarily loses
communication with the Global
Positioning System (GPS).
Cruise Control Messages ADAPTIVE CRUISE SET
TO XXX This message displays when the
Adaptive Cruise Control (ACC)
speed is set. See Adaptive Cruise
Control 0 223 .
ADAPTIVE CRUISE
TEMPORARILY UNAVAILABLE This message displays when
attempting to activate Adaptive
Cruise Control (ACC) when it is
temporarily unavailable. The ACC
system does not need service.
This can occur under the following
conditions:
.
The radar is not clean. Keep the
radar sensors free of mud, dirt,
snow, ice, and slush. Clean the
entire front and/or rear of the vehicle. For cleaning
instructions, see Exterior
Care 0 333 .
.
Heavy rain or snow is interfering
with the radar object detection or
camera performance.
CRUISE SET TO XXX This message displays when the
cruise control speed is set. See
Cruise Control 0 220 .
NO CRUISE BRAKING GAS
PEDAL APPLIED This message displays when
Adaptive Cruise Control (ACC) is
active and the driver is pressing the
gas pedal. When this occurs, ACC
will not brake. See Adaptive Cruise
Control 0 223 .
SERVICE ADAPTIVE CRUISE
CONTROL
This message displays when the
Adaptive Cruise Control (ACC)
needs service. Take the vehicle to
your dealer. SHIFT TO PARK BEFORE
EXITING This message may display if
Adaptive Cruise Control (ACC) is
engaged holding the vehicle at a
stop, and the driver attempts to exit
the vehicle. Put the vehicle in
P (Park) before exiting.
Door Ajar Messages DOOR OPEN A door open symbol will be
displayed on the DIC showing which
door is open. If the vehicle has been
shifted out of P (Park), a DOOR
OPEN message will also be
displayed. The DOOR OPEN
message may also be displayed if
the vehicle starts to move. Close the
door completely.
HOOD OPEN
This message will display along with
a hood open symbol when the hood
is open. A chime may also sound.
Close the hood completely.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
150 Instruments and Controls before filling to the recommended
level. If the oil is not low and this
message remains on, take the
vehicle to your dealer for service.
See Engine Oil 0 270 .
OIL PRESSURE LOW — TURN
VEHICLE OFF This message displays if low oil
pressure levels occur. Stop the
vehicle as soon as safely possible
and do not operate it until the cause
of the low oil pressure has been
corrected. Check the oil as soon as
possible and have the vehicle
serviced by your dealer.
Engine Power Messages ENGINE POWER IS REDUCED This message displays when the
vehicle's engine power is reduced.
Reduced engine power can affect
the vehicle's ability to accelerate.
If this message is on, but there is no
reduction in performance, proceed
to your destination. The
performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven at a reduced speed while this message is on, but
maximum acceleration and speed
may be reduced. Anytime this
message stays on, the vehicle
should be taken to your dealer for
service as soon as possible.
Fuel System Messages FUEL LEVEL LOW This message displays when the
vehicle is low on fuel. Refuel as
soon as possible.
Key and Lock Messages NO REMOTE KEY WAS
DETECTED PLACE KEY IN
TRANSMITTER POCKET THEN
START YOUR VEHICLE This message displays when trying
to start the vehicle if an RKE
transmitter is not detected. The
transmitter battery may be weak.
See “ Starting the Vehicle with a Low
Transmitter Battery ” under Remote
Keyless Entry (RKE) System
Operation 0 29 . NO REMOTE DETECTED This message displays when the
transmitter battery may be weak.
See “ Starting the Vehicle with a Low
Transmitter Battery ” under Remote
Keyless Entry (RKE) System
Operation 0 29 .
NO REMOTE DETECTED
PRESS BRAKE TO RESTART This message displays when
attempting to turn off the vehicle
and the RKE transmitter is no longer
detected. Restarting is allowed
without the RKE transmitter for
five minutes. Press the brake pedal
and ENGINE START/STOP to
restart the vehicle.
NUMBER OF KEYS
PROGRAMMED This message displays when
programming new keys to the
vehicle.
REMOTE LEFT IN VEHICLE
This message displays when
leaving the vehicle with the RKE
transmitter still inside.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Instruments and Controls 151REPLACE BATTERY IN
REMOTE KEY This message displays when the
battery in the RKE transmitter needs
to be replaced.
Lamp Messages AUTOMATIC LIGHT CONTROL
ON/OFF This message is displayed when the
automatic light control has been
turned on or off. See Automatic
Headlamp System 0 172 .
XX TURN INDICATOR FAILURE When one of the turn signals is out,
this message displays to show
which bulb needs to be replaced.
See Bulb Replacement 0 288 and
Replacement Bulbs 0 289 .
TURN SIGNAL ON
This message is displayed if the
turn signal has been left on. Turn off
the turn signal. Object Detection System
Messages 24 GHz RADARS OFF This message displays when driving
in certain areas where there may be
radar interference. Adaptive Cruise
Control (ACC), Forward Collision
Alert (FCA), and the Front
Automatic Braking (FAB) System
may not work or may not work as
well. The vehicle does not need
service.
AUTOMATIC COLLISION
PREP OFF This message displays when the
Front Automatic Braking (FAB)
System has been turned off. See
Front Automatic Braking (FAB)
System 0 240 .
AUTOMATIC COLLISION PREP
REDUCED
If the vehicle has Adaptive Cruise
Control (ACC), this message
displays when the Front Automatic
Braking (FAB) System has been set
to the Alert setting. This setting disables FAB functions but if the
vehicle has Adaptive Cruise Control
(ACC), some last-second automatic
braking capability is still provided,
though less likely to occur. See
Front Automatic Braking (FAB)
System 0 240 .
AUTOMATIC COLLISION PREP
UNAVAILABLE This message displays when the
Front Automatic Braking (FAB)
System has been unavailable for
some time. The FAB System does
not need service. This message can
display under the following
conditions:
.
The front of the vehicle or
windshield is not clean. Keep
these areas clean and free of
mud, dirt, snow, ice, and slush.
For cleaning instructions, see
Exterior Care 0 333 .
.
Heavy rain or snow is interfering
with the object detection
performance.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
152 Instruments and Controls This message may also be
displayed if there is a problem with
the StabiliTrak system. See Traction
Control/Electronic Stability
Control 0 217 .
FORWARD COLLISION
ALERT OFF This message displays when the
Forward Collision Alert has been
turned off.
FRONT CAMERA BLOCKED
CLEAN WINDSHIELD This message displays when the
camera is blocked. The Front
Pedestrian Braking (FPB), Forward
Collision Alert (FCA), Front
Automatic Braking (FAB), Lane
Keep Assist (LKA), and Lane
Departure Warning (LDW) features
will not operate. Cleaning the
outside of the windshield behind the
rearview mirror may correct the
issue. LANE CHANGE ALERT OFF This message indicates that the
driver has turned the Side Blind
Zone Alert (SBZA) and Lane
Change Alert (LCA) systems off.
LANE KEEPING ASSIST
UNAVAILABLE This message displays when the
Lane Keep Assist (LKA) and Lane
Departure Warning (LDW) system is
temporarily unavailable. The LKA
system does not need service.
This message could be due to the
camera being blocked. Clean the
outside of the windshield behind the
rearview mirror.
REAR AUTO BRAKE/PARK
ASSIST OFF This message displays when the
Parking Assist system has been
turned off or when there is a
temporary condition causing the
system to be disabled. REAR AUTO BRAKE AND
PARK ASSIST UNAVAILABLE This message displays when
attempting to activate the parking
and backing features of the Driver
Assistance System when they are
temporarily unavailable. The system
does not need service.
This can occur under the following
conditions:
.
The radar is not clean. Keep the
radar sensors free of mud, dirt,
snow, ice, and slush. Clean the
entire front and/or rear of the
vehicle. For cleaning
instructions, see Exterior
Care 0 333 .
.
Heavy rain or snow is interfering
with the radar object detection or
camera performance.
See Driver Assistance
Systems 0 230 .
SERVICE AUTOMATIC
COLLISION PREP
If this message displays, take the
vehicle to your dealer to repair the
system. Adaptive Cruise Control

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Instruments and Controls 153(ACC), Forward Collision Alert
(FCA), and/or the Front Automatic
Braking (FAB) System may not
work. Do not use these systems
until the vehicle has been repaired.
SERVICE DRIVER ASSIST
SYSTEM If this message displays, take the
vehicle to your dealer to repair the
system.
Adaptive Cruise Control (ACC),
Forward Collision Alert (FCA), Front
Automatic Braking (FAB),
Assistance Systems for Parking or
Backing, Lane Keep Assist (LKA),
and/or Lane Departure Warning
(LDW) may not work. Do not use
these systems until the vehicle has
been repaired.
SERVICE FRONT CAMERA
If this message remains on after
continued driving, the vehicle needs
service. Take the vehicle to your
dealer. Do not use the Front
Pedestrian Braking (FPB), Forward
Collision Alert (FCA), Front Automatic Braking (FAB), Lane
Keep Assist (LKA), and Lane
Departure Warning (LDW) features.
SERVICE NIGHT VISION
SYSTEM The Night Vision system needs
service. See your dealer.
SERVICE PARK ASSIST This message displays if there is a
problem with the Parking Assist
system. Do not use this system to
help you park. See your dealer for
service.
SERVICE REAR AUTO BRAKE
AND PARK ASSIST This message displays if there is a
problem with the parking and
backing features of the Driver
Assistance System. Do not use this
system to help park or back the
vehicle. See your dealer for service.
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" under
Exterior Care 0 333 .
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) 0 248 .

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
154 Instruments and Controls
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 0 217 .
SERVICE TRACTION
CONTROL This message displays when there
is a problem with the Traction
Control System (TCS). See Traction
Control/Electronic Stability
Control 0 217 .
TRACTION CONTROL OFF This message displays when the
Traction Control System (TCS) has
been turned off. See Traction
Control/Electronic Stability
Control 0 217 .
TRACTION CONTROL ON
This message displays when the
Traction Control System (TCS) has
been turned on. See Traction
Control/Electronic Stability
Control 0 217 . 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Instruments and Controls 155
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. SERVICE ACTIVE STEERING
SYSTEM This message displays when there
may be a problem with Active Rear
Steer system. The rear wheels may
be locked at current position and the
driver may experience 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.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
156 Instruments and Controls
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). See Tire
Pressure Monitor Operation 0 309 . TIRE LEARNING ACTIVE This message displays when the
system is learning new tires. See
Tire Pressure Monitor
Operation 0 309 .
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 0 137 .
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 Tires
0 299 , Vehicle Load Limits 0 198 ,
and Tire Pressure 0 306 . More than one tire pressure
message can appear at a time. The
DIC also shows the tire pressure
values. See Driver Information
Center (DIC) 0 140 .
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). See
Manual Mode 0 212 .
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).

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
178 Climate Controls
Climate Controls Climate Control Systems Automatic Climate Control
System (Quad Zone) . . . . . . . . 178
Automatic Climate Control
System (Dual Zone) . . . . . . . . . 185
Air Vents Air Vents . . . . . . . . . . . . . . . . . . . . . 189
Maintenance Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . 190
Service . . . . . . . . . . . . . . . . . . . . . . . 190 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-U.S./Canada-9235592) -
2016 - crc - 11/6/15
190 Climate Controls 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 0 344 .
See your dealer regarding
replacement of the filter.
Service This vehicle has the new
environmentally friendly refrigerant,
R1234yf. This refrigerant has a
significantly reduced global warming
impact on the environment,
compared to the traditional
automotive refrigerant, R-134a. 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.