engine coolant CADILLAC CT6 2017 1.G Owners Manual

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INTRODUCTION 3
Symbols
The vehicle has components and
labels that use symbols instead of
text. Symbols are shown along with
the text describing the operation or
information relating to a specific
component, control, message, gauge,
or indicator.
M:Shown when the owner manual
has additional instructions or
information.
*: Shown when the service manual
has additional instructions or
information.
0: Shown when there is more
information on another page —
“see page.”
Vehicle Symbol Chart
Here are some additional symbols that
may be found on the vehicle and what
they mean. For more information on
the symbol, refer to the Index.
9: Airbag Readiness Light
#:Air Conditioning
G:Air Conditioning Refrigerant Oil
!:Antilock Brake System (ABS)
g: Audio Steering Wheel Controls or
OnStar®(if equipped)
$: Brake System Warning Light
I:Certified Technician
":Charging System
I: Cruise Control
`:Do Not Puncture
^:Do Not Service
B:Engine Coolant Temperature
O:Exterior Lamps
_:Flame/Fire Prohibited
H: Flammable
.:Fuel Gauge
+: Fuses
3:Headlamp High/Low-Beam
Changer
(: Heated Steering Wheel
j:LATCH System Child Restraints
*:Malfunction Indicator Lamp
::Oil Pressure
O:Power
/:Remote Vehicle Start
>:Safety Belt Reminders
h:Start/Stop
7: Tire Pressure Monitor
d:Traction Control/StabiliTrak®
a:Under Pressure
M: Windshield Washer Fluid

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
KEYS, DOORS, AND WINDOWS 35
Extending Engine Run Time
The engine run time can also be
extended by another 10 minutes,
if during the first 10 minutes
Steps 1 and 2 are repeated while the
engine is still running. An extension
can be requested 30 seconds after
starting. This provides a total of
20 minutes.
The remote start can only be
extended once.
When the remote start is extended,
the second 10 minute period is added
on to the first 10 minutes for a total
of 20 minutes.
A maximum of two remote starts, or a
remote start with an extension, are
allowed between ignition cycles.
The vehicle's ignition must be
changed to ON/RUN/START and then
back to OFF before the remote start
procedure can be used again.
Canceling a Remote Start
To cancel a remote start, do one of
the following:
.Press and hold
/until the
parking lamps turn off. .
Turn on the hazard warning
flashers.
. Turn the vehicle on and then off.
Conditions in Which Remote Start
Will Not Work
The remote start will not operate if
any of the following occur:
. The ignition is in any mode other
than OFF.
. A transmitter is in the vehicle.
. The hood is not closed.
. The hazard warning flashers
are on.
. There is an emission control
system malfunction.
. The engine coolant temperature is
too high.
. The oil pressure is low.
. Two remote vehicle starts have
already been used.
. The vehicle is not in P (Park).
Door Locks
{Warning
Unlocked doors can be dangerous.
. Passengers, especially
children, can easily open the
doors and fall out of a moving
vehicle. The chance of being
thrown out of the vehicle in a
crash is increased if the doors
are not locked. So, all
passengers should wear safety
belts properly and the doors
should be locked whenever
the vehicle is driven.
. Young children who get into
unlocked vehicles may be
unable to get out. A child can
be overcome by extreme heat
and can suffer permanent
injuries or even death from
heat stroke. Always lock the
vehicle whenever leaving it.
. Outsiders can easily enter
through an unlocked door
when slowing or stopping the
(Continued)

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INSTRUMENTS AND CONTROLS 107
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . . . 108
Steering Wheel Controls . . . . . . . . . 108
Heated Steering Wheel . . . . . . . . . . 108
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Windshield Wiper/Washer . . . . . . . 109
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Power Outlets . . . . . . . . . . . . . . . . . . . . . 111
Wireless Charging . . . . . . . . . . . . . . . . 113
Cigarette Lighter . . . . . . . . . . . . . . . . . . 114
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . . . . 114
Instrument Cluster (Base Level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Instrument Cluster (Uplevel) . . . . 118
Speedometer . . . . . . . . . . . . . . . . . . . . . . 121
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . 121
Trip Odometer . . . . . . . . . . . . . . . . . . . . 121
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 121
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . 121
Boost Gauge (Performance Configuration Only) . . . . . . . . . . . . 122 Engine Oil Pressure Gauge (Base
Level Cluster) . . . . . . . . . . . . . . . . . . . 123
Engine Oil Temperature Gauge (Performance
Configuration Only) . . . . . . . . . . . . 123
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Voltmeter Gauge (Base Level Cluster) . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Safety Belt Reminders . . . . . . . . . . . . 125
Airbag Readiness Light . . . . . . . . . . 126
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . 126
Charging System Light . . . . . . . . . . . 127
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . . . 127
Brake System Warning Light . . . . 129
Electric Parking Brake Light . . . . . 130
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . . . 130
Lane Keep Assist (LKA) Light . . . 131
Vehicle Ahead Indicator . . . . . . . . . 131
Pedestrian Ahead Indicator . . . . . . 131
Traction Off Light . . . . . . . . . . . . . . . . 131
StabiliTrak
®OFF Light . . . . . . . . . . . 132
Traction Control System (TCS)/ StabiliTrak
®Light . . . . . . . . . . . . . . 132
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . 132 Tire Pressure Light . . . . . . . . . . . . . . . 133
Engine Oil Pressure Light . . . . . . . . 133
Low Fuel Warning Light . . . . . . . . . 134
Auto Stop Mode (Uplevel
Cluster) . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Security Light . . . . . . . . . . . . . . . . . . . . . 134
High-Beam On Light . . . . . . . . . . . . . 134
Lamps On Reminder . . . . . . . . . . . . . 135
Cruise Control Light . . . . . . . . . . . . . . 135
Door Ajar Light . . . . . . . . . . . . . . . . . . . 135
Information Displays
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . 136
Head-Up Display (HUD) . . . . . . . . . 138
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . . . . . 141
Battery Voltage and Charging Messages . . . . . . . . . . . . . . . . . . . . . . . . 141
Brake System Messages . . . . . . . . . . 142
Cruise Control Messages . . . . . . . . . 142
Door Ajar Messages . . . . . . . . . . . . . . 143
Engine Cooling System Messages . . . . . . . . . . . . . . . . . . . . . . . . 143
Engine Oil Messages . . . . . . . . . . . . . 144
Engine Power Messages . . . . . . . . . . 144
Fuel System Messages . . . . . . . . . . . 145
Key and Lock Messages . . . . . . . . . . 145
Lamp Messages . . . . . . . . . . . . . . . . . . . 145

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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124 INSTRUMENTS AND CONTROLS
Engine Coolant
Temperature Gauge
Base Level Standard Theme Shown
Balanced Configuration Shown
This gauge measures the engine
coolant temperature.
The warning area at the far end of the
gauge may appear shaded or may be
colored red.
If the pointer approaches the warning
area or the shaded thermostat symbol,
the engine may be too hot.
Under some driving conditions,
including those listed below, it is
normal for the temperature to rise
above the usual operating range and
approach the far end of the gauge:
. Stop and go driving in heavy
traffic. .
High speed operation in warm
weather.
. Uphill driving.
. Trailer towing or hauling a
heavy load.
It is normal for the reading to
fluctuate.
If the gauge pointer reaches the
warning area or the shaded
thermostat symbol at the far end of
the gauge and remains there for more
than 30 seconds, the engine coolant
has overheated.
If the engine coolant has overheated,
pull over and stop the vehicle as soon
as it is safe to do so. Then, turn the
engine off immediately.
See Engine Overheating 0259.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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132 INSTRUMENTS AND CONTROLS
reconfigurable cluster, this light is in
the display area and it may not come
on when the ignition is turned on.
The traction off light comes on when
the Traction Control System (TCS) has
been turned off by pressing and
releasing the TCS/StabiliTrak button.
This light and the StabiliTrak OFF
light come on when StabiliTrak is
turned off.
If the TCS is off, wheel spin is not
limited. Adjust driving accordingly.
SeeTraction Control/Electronic Stability
Control 0208.
StabiliTrak®OFF Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your
dealer. This light comes on when the
StabiliTrak system is turned off.
If StabiliTrak is off, the Traction
Control System (TCS) is also off.
If StabiliTrak and TCS are off, the
system does not assist in controlling
the vehicle. Turn on the TCS and the
StabiliTrak systems, and the warning
light turns off.
See
Traction Control/Electronic Stability
Control 0208.
Traction Control System
(TCS)/StabiliTrak®Light
This light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally, the
indicator light turns off. If the light is on and not flashing, the
TCS and potentially the StabiliTrak
system have been disabled. A Driver
Information Center (DIC) message
may display. Check the DIC messages
to determine which feature(s) is no
longer functioning and whether the
vehicle requires service. See
Ride
Control System Messages 0148.
If the light is on and flashing, the TCS
and/or the StabiliTrak system is
actively working.
See Traction Control/Electronic Stability
Control 0208.
Engine Coolant
Temperature Warning Light
On some vehicles this light comes on
briefly while starting the vehicle. If it
does not, have the vehicle serviced by
the dealer. If the system is working
normally the indicator light goes off.

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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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
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 -
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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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244 VEHICLE CARE
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 245
Accessories andModifications . . . . . . . . . . . . . . . . . . . 245
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 245
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 247
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 250
Engine Oil Life System . . . . . . . . . . . 252
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Engine Air Cleaner/Filter . . . . . . . . . 254
Cooling System . . . . . . . . . . . . . . . . . . . 255
Engine Coolant . . . . . . . . . . . . . . . . . . . 256
Engine Overheating . . . . . . . . . . . . . . 259
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 260
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 262
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
All-Wheel Drive . . . . . . . . . . . . . . . . . . 264
Starter Switch Check . . . . . . . . . . . . . 264
Automatic Transmission Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264 Park Brake and P (Park)
Mechanism Check . . . . . . . . . . . . . . 265
Wiper Blade Replacement . . . . . . . 265
Windshield Replacement . . . . . . . . 266
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . . . . . 266
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 267
LED Lighting . . . . . . . . . . . . . . . . . . . . . 267
License Plate Lamp . . . . . . . . . . . . . . 267
Replacement Bulbs . . . . . . . . . . . . . . . 267
Electrical System
Electrical System Overload . . . . . . 268
Fuses and Circuit Breakers . . . . . . 269
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Instrument Panel Fuse Block . . . . 272
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
All-Season Tires . . . . . . . . . . . . . . . . . . 277
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 277
Low-Profile Tires . . . . . . . . . . . . . . . . . 278
Summer Tires . . . . . . . . . . . . . . . . . . . . 278
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 279
Tire Pressure for High-SpeedOperation . . . . . . . . . . . . . . . . . . . . . . . . 280 Tire Pressure Monitor System . . . 280
Tire Pressure Monitor
Operation . . . . . . . . . . . . . . . . . . . . . . . . 281
Tire Inspection . . . . . . . . . . . . . . . . . . . 284
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 284
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Buying New Tires . . . . . . . . . . . . . . . . 286
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Wheel Replacement . . . . . . . . . . . . . . 288
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . 289
If a Tire Goes Flat . . . . . . . . . . . . . . . . 289
Tire Changing . . . . . . . . . . . . . . . . . . . . . 291
Compact Spare Tire . . . . . . . . . . . . . . 295
Jump Starting
Jump Starting . . . . . . . . . . . . . . . . . . . . . 296
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . . . . . 299
Recreational Vehicle Towing . . . . 299
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . 301
Interior Care . . . . . . . . . . . . . . . . . . . . . . 305
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . 308

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248 VEHICLE CARE
1. Engine Coolant Surge Tank andPressure Cap. See Cooling
System 0255.
2. Engine Air Cleaner/Filter 0254.
3. Engine Cooling Fan (Out of View). See Cooling System 0255.
4. Engine Oil Fill Cap. See Engine
Oil 0250. 5. Engine Oil Dipstick. See
Engine
Oil 0250.
6. Remote Positive (+) Battery Terminal. See Jump
Starting 0296.
7. Engine Compartment Fuse
Block 0269. 8. Brake Fluid Reservoir. See
Brake
Fluid 0262.
9. Windshield Washer Fluid Reservoir. See Washer
Fluid 0260.
10. Remote Negative (-) Battery Terminal. See Jump
Starting 0296.