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278 VEHICLE CARE
on the vehicle if frequent driving on
ice or snow covered roads is expected.
See your dealer for details regarding
winter tire availability and proper tire
selection. Also, seeBuying New
Tires 0286.
With winter tires, there may be
decreased dry road traction, increased
road noise, and shorter tread life.
After changing to winter tires, be alert
for changes in vehicle handling and
braking.
If using winter tires:
. Use tires of the same brand and
tread type on all four wheel
positions.
. Use only radial ply tires of the
same size, load range, and speed
rating as the original equipment
tires.
Winter tires with the same speed
rating as the original equipment tires
may not be available for H, V, W, Y,
and ZR speed rated tires. If winter
tires with a lower speed rating are
chosen, never exceed the tire's
maximum speed capability.Low-Profile Tires
If the vehicle has 245/45R19 or
245/40R20 size tires, they are
classified as low-profile tires.
Caution
Low-profile tires are more
susceptible to damage from road
hazards or curb impact than
standard profile tires. Tire and/or
wheel assembly damage can occur
when coming into contact with
road hazards like potholes, or sharp
edged objects, or when sliding into
a curb. The warranty does not cover
this type of damage. Keep tires set
to the correct inflation pressure and
when possible, avoid contact with
curbs, potholes, and other road
hazards.
Summer Tires
This vehicle may come with high
performance summer tires. These tires
have a special tread and compound
that are optimized for maximum dry
and wet road performance. This special tread and compound will have
decreased performance in cold
climates, and on ice and snow. It is
recommended that winter tires be
installed on the vehicle if frequent
driving at temperatures below
approximately 5 °C (40 °F) or on ice or
snow covered roads is expected. See
Winter Tires
0277.
Caution
High performance summer tires
have rubber compounds that lose
flexibility and may develop surface
cracks in the tread area at
temperatures below −7 °C (20 °F).
Always store high performance
summer tires indoors and at
temperatures above −7 °C (20 °F)
when not in use. If the tires have
been subjected to −7 °C (20 °F) or
less, let them warm up in a heated
space to at least 5 °C (40 °F) for
24 hours or more before being
installed or driving a vehicle on
which they are installed. Do not
apply heat or blow heated air
(Continued)
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
VEHICLE CARE 285
Use this rotation pattern if the
vehicle has different size tires on
the front and rear.
Different tire sizes should not be
rotated front to rear.Use this rotation pattern when
rotating tires of the same size
installed on all four wheel
positions.
If the vehicle has a compact spare
tire, do not include it in the tire
rotation.
Adjust the front and rear tires to
the recommended inflation
pressure on the Tire and Loading
Information label after the tires
have been rotated. SeeTire
Pressure 0279 and Vehicle Load
Limits 0191. Reset the Tire Pressure Monitor
System. See
Tire Pressure Monitor
Operation 0281.
Check that all wheel nuts are
properly tightened. See “Wheel
Nut Torque ”under Capacities and
Specifications 0322.
{Warning
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
make wheel nuts become loose
after time. The wheel could come
off and cause an accident. When
changing a wheel, remove any rust
or dirt from places where the wheel
attaches to the vehicle. In an
emergency, a cloth or a paper towel
can be used; however, use a scraper
or wire brush later to remove all
rust or dirt.
Lightly coat the center of the
wheel hub with wheel bearing
grease after a wheel change or tire
rotation to prevent corrosion or
rust build-up. Do not get grease
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
290 VEHICLE CARE
more likely to leak out slowly. But if
there ever is a blowout, here are a few
tips about what to expect and what
to do:
If a front tire fails, the flat tire creates
a drag that pulls the vehicle toward
that side. Take your foot off the
accelerator pedal and grip the steering
wheel firmly. Steer to maintain lane
position, and then gently brake to a
stop, well off the road, if possible.
A rear blowout, particularly on a
curve, acts much like a skid and may
require the same correction as used in
a skid. Stop pressing the accelerator
pedal and steer to straighten the
vehicle. It may be very bumpy and
noisy. Gently brake to a stop, well off
the road, if possible.
{Warning
Driving on a flat tire will cause
permanent damage to the tire.
Re-inflating a tire after it has been
driven on while severely
underinflated or flat may cause a
blowout and a serious crash. Never(Continued)
Warning (Continued)
attempt to re-inflate a tire that has
been driven on while severely
underinflated or flat. Have your
dealer or an authorized tire service
center repair or replace the flat tire
as soon as possible.
{Warning
Lifting a vehicle and getting under
it to do maintenance or repairs is
dangerous without the appropriate
safety equipment and training. If a
jack is provided with the vehicle, it
is designed only for changing a flat
tire. If it is used for anything else,
you or others could be badly injured
or killed if the vehicle slips off the
jack. If a jack is provided with the
vehicle, only use it for changing a
flat tire.
If a tire goes flat, avoid further tire
and wheel damage by driving slowly
to a level place, well off the road, if possible. Turn on the hazard
warning flashers. See
Hazard Warning
Flashers 0166.
{Warning
Changing a tire can be dangerous.
The vehicle can slip off the jack and
roll over or fall causing injury or
death. Find a level place to change
the tire. To help prevent the vehicle
from moving:
1. Set the parking brake firmly.
2. Put an automatictransmission in P (Park) or a
manual transmission in
1 (First) or R (Reverse).
3. Turn off the engine and do not restart while the vehicle
is raised.
4. Do not allow passengers to remain in the vehicle.
5. Place wheel blocks, if equipped, on both sides of
the tire at the opposite corner
of the tire being changed.
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
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VEHICLE CARE 291
When the vehicle has a flat tire (2),
use the following example as a guide
to assist in the placement of the
wheel blocks (1), if equipped.
1. Wheel Block (If Equipped)
2. Flat Tire
The following information explains
how to repair or change a tire.
Tire Changing
Removing the Spare Tire and
Tools
1. Jack
2. Retainer Nut
3. Tool Bag
4. Strap
5. Wrench
6. Tow Hook (If Equipped)
To access the spare tire and tools:1. Open the trunk.
2. Lift the spare tire cover and attach the handle to the
trunk edge.
3. Turn the retainer nutcounterclockwise and remove the
spare tire. Place the spare tire
next to the tire being changed.
4. Remove the jack and tools from their container and place them
near the tire being changed.
Removing the Flat Tire and
Installing the Spare Tire
1. Do a safety check beforeproceeding. See If a Tire Goes
Flat 0289.
2. Turn the wheel wrench counterclockwise to loosen and
remove the wheel nut caps.
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
SERVICE AND MAINTENANCE 317
‐High use commercial vehicles
such as courier delivery vehicles,
private security patrol vehicles
or any vehicles that operate on
a 24 hour basis.
‐ Any vehicle consistently
operated in a high sand or dust
environment such as those used
on oil pipelines and similar
applications. .
Vehicles that are regularly used for
short trips of 6 kilometers or less
If your vehicle has an Oil Life
Indicator, the indicator will show
you when to change the oil and
filter. Under severe conditions the
indicator may come on before
10 000 km/6,000 mi. The indicator
won't detect dust in the oil, so if
you drive in a dusty area you may
have to change the oil and filter
sooner than every 10 000 km/
6,000 mi. Note: All vehicles with rear-wheel
drive
—change driveline axle oil
every 30 000 km/19,000 mi if
vehicle is used for towing
purposes.
* Footnote: Under extreme driving
conditions listed above, it may be
necessary to replace your spark
plugs at more frequent intervals.
For further assistance in
determining the most suitable
service maintenance intervals for
your vehicle, please contact your
authorized GM Dealer.
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INDEX 327
IndexA
Accessories and Modifications . . . . . 245
Accessory Power . . . . . . . . . . . . . . . . . . . . 198
Adaptive Cruise Control . . . . . . . . . . . . 213
Add-On Electrical Equipment . . . . . . 243
AdjustmentsLumbar, Front Seats . . . . . . . . . . . . . . . . 58
Lumbar, Rear Seats . . . . . . . . . . . . . . . . . 65
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 59
Air Cleaner/Filter, Engine . . . . . . . . . . 254
Air Conditioning . . . . . . . . . . . . . . .171, 178
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 183
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Airbag System
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
How Does an Airbag Restrain? . . . . . 78
Passenger Sensing System . . . . . . . . . 79
What Makes an Airbag Inflate? . . . . 78
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 78
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Where Are the Airbags? . . . . . . . . . . . . 75
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Passenger Status Indicator . . . . . . . 126 Airbags (cont'd)
Readiness Light . . . . . . . . . . . . . . . . . . . 126
Servicing Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
System Check . . . . . . . . . . . . . . . . . . . . . . . 74
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 42
Alert Lane Change . . . . . . . . . . . . . . . . . . . . . . 236
Side Blind Zone (SBZA) . . . . . . . . . . 236
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 277
All-Wheel Drive . . . . . . . . . . . . . . . .204, 264
Antilock Brake System (ABS) . . . . . . 205 Warning Light . . . . . . . . . . . . . . . . . . . . 130
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Armrest Storage . . . . . . . . . . . . . . . . . . . . . 104
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Assistance Systems for Driving . . . . 228
Assistance Systems for Parking
and Backing . . . . . . . . . . . . . . . . . . . . . . . 222
Auto Stop Mode . . . . . . . . . . . . . . . . . . . . 134
Automatic
Climate Control System . . . . . 171, 178
Dimming Mirrors . . . . . . . . . . . . . . . . . . . 46
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Forward Braking . . . . . . . . . . . . . . . . . . 230
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CRC - 6/21/16
330 INDEX
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 169
Extended Parking . . . . . . . . . . . . . . . . . . . 200
Exterior Lamp Controls . . . . . . . . . . . . 163
Exterior Lamps Off Reminder . . . . . . 164
Exterior Lighting Battery Saver . . . . 169
F
FeaturesMemory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . 254
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 165
Flashers, Hazard Warning . . . . . . . . . . 166
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Fluid Automatic Transmission . . . . . . . . . 253
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 46
Forward Automatic Braking . . . . . . . . 230
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Front Seats Heated and Ventilated . . . . . . . . . . . . . 62
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240 Fuel (cont'd)
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Economy Driving . . . . . . . . . . . . . . . . . . . 26
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . . . . . . 242
Filling the Tank . . . . . . . . . . . . . . . . . . . 240
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Low Fuel Warning Light . . . . . . . . . 134
System Messages . . . . . . . . . . . . . . . . . 145
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Fuses and Circuit Breakers . . . . . . . 269
Instrument Panel Fuse Block . . . . 272
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
G
Garage Door OpenerProgramming . . . . . . . . . . . . . . . . . . . . . . 160
Gauges Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Engine Coolant Temperature . . . . 124
Engine Oil Pressure . . . . . . . . . . . . . . . 123
Engine Oil Temperature . . . . . . . . . . 123
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Speedometer . . . . . . . . . . . . . . . . . . . . . . 121
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 121 Gauges (cont'd)
Trip Odometer . . . . . . . . . . . . . . . . . . . . 121
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . 114
General Information Service and Maintenance . . . . . . . . 310
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 245
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
H
Hazard Warning Flashers . . . . . . . . . . 166
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 56
Head-up Display . . . . . . . . . . . . . . . . . . . . 138
Headlamps Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 165
Bulb Replacement . . . . . . . . . . . . . . . . 267
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 165
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 165
High-Beam On Light . . . . . . . . . . . . . . 134
High/Low Beam Changer . . . . . . . . . 164
Lamps On Reminder . . . . . . . . . . . . . . 135
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . 108
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
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CRC - 6/21/16
334 INDEX
Ride Control SystemsMessages . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Roads Driving, Wet . . . . . . . . . . . . . . . . . . . . . . . 188
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Rotation, Tires . . . . . . . . . . . . . . . . . . . . . . 284
Routing, Engine Drive Belt . . . . . . . . . 324
Running the Vehicle While
Parked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
S
Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . 69
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Reminders . . . . . . . . . . . . . . . . . . . . . . . . . 125
Replacing after a Crash . . . . . . . . . . . . . 73
Use During Pregnancy . . . . . . . . . . . . . . 72
Safety Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Safety System Check . . . . . . . . . . . . . . . . 72
Seats Head Restraints . . . . . . . . . . . . . . . . . . . . . 56
Heated and Ventilated Front . . . . . . . 62
Heated and Ventilated, Rear . . . . . . . 66
Lumbar Adjustment, Front . . . . . . . . . 58 Seats (cont'd)
Lumbar Adjustment, Rear . . . . . . . . . . 65
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Power Adjustment, Front . . . . . . . . . . 58
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Reclining Seatbacks . . . . . . . . . . . . . . . . 60
Securing Child Restraints . . . . . . . 98, 99
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . 42
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Accessories and
Modifications . . . . . . . . . . . . . . . . . . . . 245
Doing Your Own Work . . . . . . . . . . . 245
Engine Soon Light . . . . . . . . . . . . . . . . 127
Maintenance Records . . . . . . . . . . . . 320
Maintenance, General Information . . . . . . . . . . . . . . . . . . . . . . 310
Parts Identification Label . . . . . . . . 321
Vehicle Messages . . . . . . . . . . . . . . . . . 149
Service Electric Parking Brake
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Services Special Application . . . . . . . . . . . . . . . 316
Servicing the Airbag . . . . . . . . . . . . . . . . . 83 Shift Lock Control Function
Check, Automatic
Transmission . . . . . . . . . . . . . . . . . . . . . . 264
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . 199
Side Blind Zone Alert (SBZA) . . . . . . 236
Signals, Turn and Lane-Change . . . . 166
Spare Tire
Compact . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Special Application Services . . . . . . . 316
Specifications and Capacities . . . . . . 322
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . 121
StabiliTrak
OFF Light . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Start Assist, Hill . . . . . . . . . . . . . . . . . . . . 207
Start Vehicle, Remote . . . . . . . . . . . . . . . 34
Starter Switch Check . . . . . . . . . . . . . . . 264
Starting the Engine . . . . . . . . . . . . . . . . . 196
Starting the Vehicle Messages . . . . . 150
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Heated Wheel . . . . . . . . . . . . . . . . . . . . . 108
Wheel Adjustment . . . . . . . . . . . . . . . . 108
Wheel Controls . . . . . . . . . . . . . . . . . . . 108
Steering System Messages . . . . . . . . . 149
Storage
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104