2018 CADILLAC CT6 fuel pressure

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/15/17
350 VEHICLE CARE
As an added safety feature, your
vehicle has been equipped with a tire
pressure monitoring system (TPMS)
that illuminates a low tire pressure
telltale when one or more of your tires
is significantly under-inflated.
Accordingly, when the low tire
pressure telltale illuminates, you
should stop and check your tires as
soon as possible, and inflate them to
the proper pressure. Driving on a
significantly under-inflated tire causes
the tire to overheat and can lead to
tire failure. Under-inflation also
reduces fuel efficiency and tire tread
life, and may affect the vehicle's
handling and stopping ability.
Please note that the TPMS is not a
substitute for proper tire maintenance,
and it is the driver's responsibility to
maintain correct tire pressure, even if
under-inflation has not reached the
level to trigger illumination of the
TPMS low tire pressure telltale.
Your vehicle has also been equipped
with a TPMS malfunction indicator to
indicate when the system is not
operating properly. The TPMS
malfunction indicator is combinedwith the low tire pressure telltale.
When the system detects a
malfunction, the telltale will flash for
approximately one minute and then
remain continuously illuminated. This
sequence will continue upon
subsequent vehicle start-ups as long
as the malfunction exists.
When the malfunction indicator is
illuminated, the system may not be
able to detect or signal low tire
pressure as intended. TPMS
malfunctions may occur for a variety
of reasons, including the installation
of replacement or alternate tires or
wheels on the vehicle that prevent the
TPMS from functioning properly.
Always check the TPMS malfunction
telltale after replacing one or more
tires or wheels on your vehicle to
ensure that the replacement or
alternate tires and wheels allow the
TPMS to continue to function
properly.
See
Tire Pressure Monitor Operation
0 350.
See Radio Frequency Statement 0417.Tire Pressure Monitor
Operation
This vehicle may have a Tire Pressure
Monitor System (TPMS). The TPMS is
designed to warn the driver when a
low tire pressure condition exists.
TPMS sensors are mounted onto each
tire and wheel assembly, excluding the
spare tire and wheel assembly. The
TPMS sensors monitor the air
pressure in the tires and transmit the
tire pressure readings to a receiver
located in the vehicle.
When a low tire pressure condition is
detected, the TPMS illuminates the
low tire pressure warning light on the
instrument cluster. If the warning
light comes on, stop as soon as
possible and inflate the tires to the
recommended pressure shown on the
Tire and Loading Information label.
See Vehicle Load Limits 0213.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
390 SERVICE AND MAINTENANCE
Cadillac Premium Care
Maintenance
Your vehicle comes with the Cadillac
Premium Care Maintenance. It is a
maintenance program that covers
select maintenance services during
the first three years or 58 000 km
(36,000 mi) whichever comes first.
Cadillac Premium Care Maintenance
covers routine maintenance services,
when scheduled in accordance with
the owner’s manual, including:
.Oil changes based on the vehicle's
oil life monitor system.
. Tire rotation every 12 000 km
(7,500 mi).
. Passenger compartment air filter
replacement.
. Multi-point vehicle inspection
(MPVI) performed by a qualified
technician.
Cadillac requires that all Cadillac
Premium Care Maintenance services
be performed by a Cadillac authorized
service dealer.
Maintenance Schedule
Owner Checks and Services
At Each Fuel Stop
. Check the engine oil level. See
Engine Oil 0307.
Once a Month
. Check the tire inflation pressures.
See Tire Pressure 0347.
. Inspect the tires for wear. See Tire
Inspection 0353.
. Check the windshield washer fluid
level. See Washer Fluid 0322.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km/600 mi. If driven
under the best conditions, the engine
oil life system may not indicate the
need for vehicle service for up to a
year. The engine oil and filter must be
changed at least once a year and the
oil life system must be reset. Your
trained dealer technician can perform
this work. If the engine oil life system is reset accidentally, service the
vehicle within 5 000 km/3,000 mi since
the last service. Reset the oil life
system when the oil is changed. See
Engine Oil Life System
0309.
Tire Rotation and Required
Services Every 12 000 km/
7,500 mi
Rotate the tires, if recommended for
the vehicle, and perform the following
services. See Tire Rotation0353.
. Check engine oil level and oil
life percentage. If needed, change
engine oil and filter, and reset oil
life system.
See Engine Oil 0307 and Engine Oil
Life System 0309.
. Check engine coolant level.
See Cooling System (Gasoline Only)
0 312 orCooling System (PLUG-IN
Only) 0316.
. Check windshield washer fluid
level. See Washer Fluid 0322.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
SERVICE AND MAINTENANCE 391
.Visually inspect windshield wiper
blades for wear, cracking,
or contamination. See Exterior
Care 0380. Replace worn or
damaged wiper blades. See Wiper
Blade Replacement 0327.
. Check tire inflation pressures. See
Tire Pressure 0347.
. Inspect tire wear. See Tire
Inspection 0353.
. Visually check for fluid leaks.
. Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter 0311.
. Inspect brake system. See Exterior
Care 0380.
. Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of wear.
See Exterior Care 0380.
. Check restraint system
components. See Safety System
Check 083.
. Visually inspect fuel system for
damage or leaks. .
Visually inspect exhaust system
and nearby heat shields for loose
or damaged parts.
. Lubricate body components. See
Exterior Care 0380.
. Check starter switch. See Starter
Switch Check 0326.
. Check automatic transmission
shift lock control function. See
Automatic Transmission Shift Lock
Control Function Check 0327.
. Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check 0327.
. Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
. Visually inspect gas strut for signs
of wear, cracks, or other damage.
Check the hold open ability of the
strut. If the hold open ability is
low, service the gas strut. See Gas
Strut(s) 0328.
. Inspect sunroof track and seal,
if equipped. See Sunroof061.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
SERVICE AND MAINTENANCE 393
Footnotes—Maintenance Schedule
Additional Required Services -
Normal
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0353.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter.
(3) Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition.
(4) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed. (5)
Or every five years, whichever
comes first.
See Cooling System (Gasoline Only)
0 312 orCooling System (PLUG-IN
Only) 0316.
(6) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace brake fluid every five
years for DOT 3 fluid or every three
years for DOT 4 fluid. See Brake Fluid
0 323.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
SERVICE AND MAINTENANCE 395
Footnotes—Maintenance Schedule
Additional Required Services -
Severe
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0353.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airf low, window
fogging, or odors. Your GM dealer can
help determine when to replace the
filter.
(3) Visually check all fuel and vapor
lines and hoses for proper attachment,
connection, routing, and condition.
(4) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
(5) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced.
(6)
Or every five years, whichever
comes first.
See Cooling System (Gasoline Only)
0 312 orCooling System (PLUG-IN
Only) 0316.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace brake fluid every five
years for DOT 3 fluid or every three
years for DOT 4 fluid. See Brake Fluid
0 323.Special Application
Services
.
Severe Commercial Use Vehicles
Only: Lubricate chassis
components every oil change.
. Have underbody flushing service
performed. See "Underbody
Maintenance" in Exterior Care
0 380.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
424 ONSTAR
other and use a combination of
letters, numbers, and symbols to
increase the security.
. Change the default name of the
SSID (Service Set Identifier). This
is your network’s name that is
visible to other wireless devices.
Choose a unique name and avoid
family names or vehicle
descriptions.
OnStar Wi-Fi Hotspot (If Equipped)
The vehicle may have a built-in Wi-Fi
hotspot that provides access to the
Internet and web content at 4G LTE
speed. Up to seven mobile devices can
be connected. A data plan is required.
Use the in-vehicle controls only when
it is safe to do so. 1. To retrieve Wi-Fi hotspot information, press
=, wait for
the prompt, then say “Wi-Fi
settings.” On some vehicles,
touch Wi-Fi Settings on the
screen.
2. The Wi-Fi settings will display the Wi-Fi hotspot name (SSID),
password, and on some vehicles,
the connection type (no Internet connection, 3G, 4G, 4G LTE), and
signal quality (poor, good,
excellent).
3. To change the SSID or password, press
Qor call 1-888-4ONSTAR
to connect with an Advisor.
After initial set-up, your vehicle’s
Wi-Fi hotspot will connect
automatically to your mobile devices.
Manage data usage by turning Wi-Fi
on or off on your mobile device, by
using the myCadillac mobile app,
or by contacting an OnStar Advisor.
MyCadillac Mobile App (If Available)
Download the myCadillac mobile app
to compatible Apple and Android
smartphones. Cadillac users can
access the following services from a
smartphone:
. Remotely start/stop the vehicle,
if factory-equipped.
. Lock/unlock doors, if equipped
with automatic locks.
. Activate the horn and lamps. .
Check the vehicle’s fuel level, oil
life, or tire pressure,
if factory-equipped with the Tire
Pressure Monitor System.
. Send destinations to the vehicle.
. Locate the vehicle on a map (U.S.
market only).
. Turn the vehicle's Wi-Fi hotspot
on/off, manage settings and
monitor data consumption,
if equipped.
. Locate a dealer and schedule
service.
. Request roadside assistance.
. Set a parking reminder with pin
drop, take a photo, make a note
and set a timer.
. Connect with Cadillac on social
media.
For myCadillac mobile app
information and compatibility, see
my.cadillac.com.
An active OnStar service, compatible
device, factory-installed remote start
and power locks are required. Data
rates apply. See onstar.com for details
and system limitations.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
INDEX 435
Driving (cont'd)Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
For Better Fuel Economy . . . . . . . . . . . 32
Hill and Mountain Roads . . . . . . . . 211
If the Vehicle is Stuck . . . . . . . . . . . . 212
Loss of Control . . . . . . . . . . . . . . . . . . . . 209
Off-Road Recovery . . . . . . . . . . . . . . . . 209
Vehicle Load Limits . . . . . . . . . . . . . . 213
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 210
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Winter Mode Light . . . . . . . . . . . . . . . 146
Driving for Better Energy Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
E
Electric Parking Brake . . . . . . . . . . . . . . 235
Electric Parking Brake Light . . . . . . . 145
Electrical Equipment, Add-On . . . . . 295
Electrical Requirements for
Battery Charging . . . . . . . . . . . . . . . . . . 285
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . 331
Instrument Panel Fuse Block . . . . 335
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337 Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422
Energy Efficiency Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Energy Information . . . . . . . . . . . . . . . . . 161
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 311
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 143
Compartment Overview . . . . . . . . . . 300
Coolant Temperature Gauge . . . . . 139
Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . 149
Cooling System . . . . . . . . . . . . . . 312, 316
Drive Belt Routing . . . . . . . . . . . . . . . . 406
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Oil Life System . . . . . . . . . . . . . . . . . . . . 309
Oil Pressure Gauge . . . . . . . . . . . . . . . . 137
Oil Pressure Light . . . . . . . . . . . . . . . . . 149
Overheating . . . . . . . . . . . . . . . . . . . . . . . 321
Power Messages . . . . . . . . . . . . . . . . . . 169
Running While Parked . . . . . . . . . . . 230
Starting . . . . . . . . . . . . . . . . . . . . . . . 218, 221
Engine Oil
Temperature Gauge . . . . . . . . . . . . . . . 138
Engine Unavailable Out of Fuel . . . . . . . . . . . . . . . . . . . . . . . . 227 Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 188
Equipment, Towing . . . . . . . . . . . . . . . . . 294
Event Data Recorders . . . . . . . . . . . . . . 419
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 189
Extended Parking . . . . . . . . . . . . . . . . . . . 226
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 83
Exterior Lamp Controls . . . . . . . . . . . . 183
Exterior Lamps Off Reminder . . . . . . 185
Exterior Lighting Battery Saver . . . . 189
F
Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . 311
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 185
Flashers, Hazard Warning . . . . . . . . . . 186
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 368
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 387
Fluid Automatic Transmission . . . . . . . . . 310
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 55
Forward Automatic Braking . . . . . . . . 262
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
436 INDEX
Frequency StatementRadio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Front Seats Heated and Ventilated . . . . . . . . . . . . . 72
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Economy Driving . . . . . . . . . . . . . . . . . . . 32
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 290
Filling the Tank . . . . . . . . . . . . . . . . . . . 288
Foreign Countries . . . . . . . . . . . . . . . . . 287
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Low Fuel Warning Light . . . . . . . . . 150
Requirements, California . . . . . . . . . 287
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . 331
Instrument Panel Fuse Block . . . . 335
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
G
Garage Door Opener . . . . . . . . . . . . . . . . 179Programming . . . . . . . . . . . . . . . . . . . . . . 179
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 328 Gauges
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Engine Coolant Temperature . . . . 139
Engine Oil Pressure . . . . . . . . . . . . . . . 137
Engine Oil Temperature . . . . . . . . . . 138
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Power Indicator . . . . . . . . . . . . . . . . . . . 136
Speedometer . . . . . . . . . . . . . . . . . . . . . . 134
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 134
Trip Odometer . . . . . . . . . . . . . . . . . . . . 134
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . 126
General Information
Service and Maintenance . . . . . . . . 388
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 297
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
H
Hazard Warning Flashers . . . . . . . . . . 186
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 65
Head-up Display . . . . . . . . . . . . . . . . . . . . 165
Headlamps Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 185
Bulb Replacement . . . . . . . . . . . . . . . . 330 Headlamps (cont'd)
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . . . . . 185
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 185
High-Beam On Light . . . . . . . . . . . . . . 151
High/Low Beam Changer . . . . . . . . . 185
Lamps On Reminder . . . . . . . . . . . . . . 151
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . 119
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Heated and Ventilated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 55
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Heating . . . . . . . . . . . . . . . . . . . . . . . . .191, 197
High Voltage Battery Gauge . . . . . . . 135
High-Beam On Light . . . . . . . . . . . . . . . . 151
High-Speed Operation . . . . . . . . . . . . . . 349
Hill and Mountain Roads . . . . . . . . . . 211
Hill Start Assist (HSA) . . . . . . . . . . . . . 237
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
How to Wear Seat Belts Properly . . . 79
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . .191, 197