2017 CADILLAC CT6 service

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INSTRUMENTS AND CONTROLS 133
For vehicles with the reconfigurable
cluster, this light may not come on
when starting the vehicle.
Caution
The engine coolant temperature
warning light indicates that the
vehicle has overheated. Driving with
this light on can damage the engine
and it may not be covered by the
vehicle warranty. SeeEngine
Overheating 0259.
The engine coolant temperature
warning light comes on when the
engine has overheated.
If this happens pull over and turn off
the engine as soon as possible. See
Engine Overheating 0259.
Tire Pressure Light
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine is
started. It provides information about
tire pressures and the TPMS.
When the Light Is On Steady
This indicates that one or more of the
tires are significantly underinflated.
A Driver Information Center (DIC) tire
pressure message may also display.
See Tire Messages 0150. Stop as soon
as possible, and inflate the tires to the
pressure value shown on the Tire and
Loading Information label. See Tire
Pressure 0279.
When the Light Flashes First and
Then Is On Steady
If the light flashes for about a minute
and then stays on, there may be a
problem with the TPMS. If the
problem is not corrected, the light will
come on at every ignition cycle. See
Tire Pressure Monitor Operation 0281.Engine Oil Pressure Light
Caution
Lack of proper engine oil
maintenance can damage the
engine. Driving with the engine oil
low can also damage the engine.
The repairs would not be covered
by the vehicle warranty. Check the
oil level as soon as possible. Add oil
if required, but if the oil level is
within the operating range and the
oil pressure is still low, have the
vehicle serviced. Always follow the
maintenance schedule for changing
engine oil.
This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced by
your dealer.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
134 INSTRUMENTS AND CONTROLS
If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle could
be low on oil and might have some
other system problem. See your dealer.
Low Fuel Warning Light
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working. For vehicles with a
reconfigurable cluster, this light is in
the display area and may not come on
when the ignition is turned on.
It also comes on when the fuel tank is
low on fuel. The light turns off when
fuel is added. If it does not, have the
vehicle serviced.
Auto Stop Mode (Uplevel
Cluster)
This light comes on when the engine
is in an Auto Stop.
SeeStarting the Engine 0196.
Security Light
On some vehicles the immobilizer
light should come on briefly as the
engine is started. If it does not come
on, have the vehicle serviced by your
dealer. If the system is working
normally, the indicator light turns off. For vehicles with the reconfigurable
cluster, this light may not come on
when the engine is started.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. See
Immobilizer
Operation 044.
High-Beam On Light
This light comes on when the
high-beam headlamps are in use.
See Headlamp High/Low-Beam
Changer 0164.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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142 INSTRUMENTS AND CONTROLS
vehicle that may be noticed. At the
point that features are disabled, this
message displays. Turn off
unnecessary accessories to allow the
battery to recharge.
LOW BATTERY
This message is displayed when the
battery voltage is low. See
Battery0263.
SERVICE BATTERY CHARGING
SYSTEM
This message is displayed when there
is a fault in the battery charging
system. Take the vehicle to your
dealer for service.
TRANSPORT MODE ON
This message is displayed when the
vehicle is in transport mode. Some
features can be disabled while in this
mode, including Remote Keyless
Entry (RKE), remote start, and the
vehicle alarm system. Take the vehicle
to your dealer for service to turn
transport mode off.
Brake System Messages
BRAKE FLUID LOW
This message is displayed when the
brake fluid level is low. See Brake
Fluid 0262.
BRAKES OVERHEATED
This message is displayed when the
brakes are becoming overheated. This
may be seen when driving on hills.
Shift to a lower gear.
STEP ON BRAKE TO RELEASE
PARK BRAKE
This message is displayed if you
attempt to release the Electric Parking
Brake without the brake pedal applied.
See Electric Parking Brake 0205.
RELEASE PARKING BRAKE
This message is displayed if the
Electric Parking Brake is on while the
vehicle is in motion. See Electric
Parking Brake 0205.
SERVICE BRAKE ASSIST
This message may be displayed when
there is a problem with the brake
boost assist system. The brake boost assist motor may be heard and brake
pedal pulsation may be felt. This is
normal under these conditions. Take
the vehicle to your dealer for service.
SERVICE PARKING BRAKE
This message is displayed when there
is a problem with the parking brake.
Take the vehicle to your dealer for
service.
Cruise Control Messages
ADAPTIVE CRUISE SET TO XXX
This message displays when the
Adaptive Cruise Control (ACC) speed is
set. See
Adaptive Cruise Control 0213.
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.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INSTRUMENTS AND CONTROLS 143
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 0301.
. 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 0211.
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 0213.
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.
TRUNK OPEN
This message will display along with a
symbol when the trunk is open. Close
the trunk completely.
Engine Cooling System
Messages
A/C OFF DUE TO HIGH
ENGINE TEMP
This message displays when the
engine coolant becomes hotter than
the normal operating temperature. To
avoid added strain on a hot engine,
the air conditioning compressor
automatically turns off. When the
coolant temperature returns to
normal, the air conditioning
compressor turns back on. The vehicle
can continue to be driven.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
144 INSTRUMENTS AND CONTROLS
If this message continues to appear,
have the system repaired by your
dealer as soon as possible to avoid
damage to the engine.
COOLANT LEVEL LOW ADD
COOLANT
This message will display if the
coolant is low. SeeEngine
Coolant 0256.
ENGINE OVERHEATED —IDLE
ENGINE
This message displays when the
engine coolant temperature is too hot.
Stop and allow the vehicle to idle until
it cools down.
ENGINE OVERHEATED —STOP
ENGINE
This message displays and a
continuous chime sounds if the
engine cooling system reaches unsafe
temperatures for operation. Stop and
turn off the vehicle as soon as it is
safe to do so to avoid severe damage.
This message clears when the engine
has cooled to a safe operating
temperature.
HIGH COOLANT TEMPERATURE
This message may display if the
coolant temperature is hot. See Engine
Overheating 0259.
Engine Oil Messages
CHANGE ENGINE OIL SOON
This message displays when the
engine oil needs to be changed. When
you change the engine oil, be sure to
reset the oil life system. See Engine Oil
Life System 0252, Driver Information
Center (DIC) 0136, Engine Oil 0250,
and Maintenance Schedule 0311.
ENGINE OIL HOT, IDLE ENGINE
This message displays when the
engine oil temperature is too hot. Stop
and allow the vehicle to idle until it
cools down.
ENGINE OIL LOW —ADD OIL
On some vehicles, this message
displays when the engine oil level may
be too low. Check the oil level 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 0250.
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

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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INSTRUMENTS AND CONTROLS 145
on, or displays repeatedly, 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” underRemote Keyless Entry
(RKE) System Operation 029.
NO REMOTE DETECTED
This message displays when the
transmitter battery may be weak. See
“Starting the Vehicle with a Low Transmitter Battery”
underRemote
Keyless Entry (RKE) System
Operation 029.
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.
REPLACE 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 0165.
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 0267 and Replacement
Bulbs 0267.
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

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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146 INSTRUMENTS AND CONTROLS
(FCA), and the Forward Automatic
Braking (FAB) may not work or may
not work as well. The vehicle does not
need service.
AUTOMATIC COLLISION PREP OFF
This message displays when the
Forward Automatic Braking (FAB) has
been turned off. SeeForward
Automatic Braking (FAB) 0230.
AUTOMATIC COLLISION PREP
REDUCED
If the vehicle has Adaptive Cruise
Control (ACC), this message displays
when the Forward Automatic Braking
(FAB) has been set to the Alert
setting. This setting disables FAB
functions. See Forward Automatic
Braking (FAB) 0230.
AUTOMATIC COLLISION PREP
UNAVAILABLE
This message displays when the
Forward Automatic Braking (FAB) 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 0301.
. Heavy rain or snow is interfering
with the object detection
performance.
This message may also be displayed if
there is a problem with the StabiliTrak
system. See Traction Control/Electronic
Stability Control 0208.
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), Forward
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.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INSTRUMENTS AND CONTROLS 147
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 0301.
. Heavy rain or snow is interfering
with the radar object detection or
camera performance.
See Driver Assistance Systems 0221.
SERVICE AUTOMATIC
COLLISION PREP
If this message displays, take the
vehicle to your dealer to repair the
system. Adaptive Cruise Control
(ACC), Forward Collision Alert (FCA),
and/or the Forward Automatic Braking
(FAB) 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),
Forward 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), Forward
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.