2018 CADILLAC CT6 check engine
[x] Cancel search: check enginePage 395 of 445
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
394 SERVICE AND MAINTENANCE
Maintenance Schedule
Additional Required Services -
Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires, if recommended for the vehicle, and
perform Required Services. Check engine oil level
and oil life percentage. Change engine oil and filter,
if needed. (1)@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Inspect evaporative control system. (3)@ @@
Replace engine air cleaner filter. (4)@@@
Replace spark plugs. Inspect spark plug wires. (2.0L
and 3.0L Twin Turbo Engines)@ @
Replace spark plugs. Inspect spark plug wires. (3.6L
Engine Only)@
Change automatic transmission fluid and filter.@@@
Change transfer case fluid, if equipped with
AWD. (5)@@@
Change rear axle fluid.@@@
Change front axle fluid, if equipped with AWD.@@@
Drain and fill engine cooling system and Power
Electronics cooling system. (6)@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)
Page 397 of 445
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
396 SERVICE AND MAINTENANCE
Additional Maintenance
and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional maintenance
services may be required.
It is recommended that your dealer
perform these services—their trained
dealer technicians know your vehicle
best. Your dealer can also perform a
thorough assessment with a
multi-point inspection to recommend
when your vehicle may need
attention.
The following list is intended to
explain the services and conditions to
look for that may indicate services are
required.
Battery
The 12-volt battery supplies power to
start the engine and operate any
additional electrical accessories.
. To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power. .
Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of cracking
or splitting.
. Trained dealer technicians have
access to tools and equipment to
inspect the belts and recommend
adjustment or replacement when
necessary.
Brakes
Brakes stop the vehicle and are crucial
to safe driving.
. Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping.
. Trained dealer technicians have
access to tools and equipment to
inspect the brakes and recommend
quality parts engineered for the
vehicle. Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. See
Recommended Fluids
and Lubricants 0399 for GM approved
fluids.
. Engine oil and windshield washer
fluid levels should be checked at
every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be filled.
Hoses
Hoses transport fluids and should be
regularly inspected to ensure that
there are no cracks or leaks. With a
multi-point inspection, your dealer
can inspect the hoses and advise if
replacement is needed.
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
. Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage. The
Page 406 of 445
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
TECHNICAL DATA 405
ApplicationCapacities
Metric English
3.0L V6 Engine Intercoolers 3.2 L 3.4 qt
3.6L V6 Engine 9.8 L 10.4 qt
3.6L V6 Engine with Rear A/C 11.4 L 12.0 qt
Engine Oil with Filter
2.0L L4 Engine 4.7 L 5.0 qt
3.0L V6 Engine 5.7 L 6.0 qt
3.6L V6 Engine 5.7 L 6.0 qt
Front Axle 0.5 L 0.53 qt
Rear Axle 0.5 L 0.53 qt
Rear Axle - PLUG–IN 1.1 L 1.16 qt
Fuel Tank Gasoline Only 72.7 L 19.2 gal
PLUG–IN 58.0 L 15.3 gal
Transfer Case –AWD 0.8 L 0.85 qt
Wheel Nut Torque 150 Y110 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual.
Recheck fluid level after filling.
Page 423 of 445
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
422 ONSTAR
PressQto connect to an Advisor to:
. Verify account information or
update contact information.
. Get driving directions.
. Receive a Diagnostic check of the
vehicle's key operating systems.
. Receive Roadside Assistance.
. Manage Wi-Fi Settings,
if equipped.
Press
>to get a priority connection
to an OnStar Advisor available 24/7 to:
. Get help for an emergency.
. Be a Good Samaritan or respond
to an AMBER Alert.
. Get assistance in severe weather
or other crisis situations and find
evacuation routes.
OnStar Services
Emergency
Emergency Services require an active,
OnStar service plan (excludes Basic
Plan). With Automatic Crash
Response, built-in sensors can
automatically alert a specially trained
OnStar Advisor who is immediately
connected in to the vehicle to help.
Press
>for a priority connection to
an OnStar Advisor who can contact
emergency service providers, direct
them to your exact location, and relay
important information.
With OnStar Crisis Assist, specially
trained Advisors are available
24 hours a day, 7 days a week, to
provide a central point of contact,
assistance, and information during a
crisis.
With Roadside Assistance, Advisors
can locate a nearby service provider to
help with a flat tire, a battery jump,
or an empty gas tank.
Security
If equipped, OnStar provides these
services:
. With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
. With Remote Ignition Block,
if equipped, OnStar can block the
engine from being restarted.
. With Stolen Vehicle Slowdown,
if equipped, OnStar can work with
law enforcement to gradually slow
the vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked
and the vehicle alarm sounds, a
notification by text, e-mail, or phone
call will be sent. If the vehicle is
stolen, an OnStar Advisor can work
with authorities to recover the vehicle.
Page 433 of 445
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
432 INDEX
IndexA
Accessories and Modifications . . . . . 298
Accessory Power . . . . . . . . . . . . . . . . . . . . 224
Adaptive Cruise Control . . . . . . . . . . . . 245
Add-On Electrical Equipment . . . . . . 295
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 396
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . . . . . 67
Lumbar, Rear Seats . . . . . . . . . . . . . . . . . 76
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 68
Air Cleaner/Filter, Engine . . . . . . . . . . 311
Air Conditioning . . . . . . . . . . . . . . .191, 197
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 204
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
How Does an Airbag Restrain? . . . . . 89
Passenger Sensing System . . . . . . . . . 91
What Makes an Airbag Inflate? . . . . 89
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 89
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Where Are the Airbags? . . . . . . . . . . . . 86 Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Passenger Status Indicator . . . . . . . 141
Readiness Light . . . . . . . . . . . . . . . . . . . 141
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
System Check . . . . . . . . . . . . . . . . . . . . . . . 85
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 51
Alert
Lane Change . . . . . . . . . . . . . . . . . . . . . . 269
Side Blind Zone (SBZA) . . . . . . . . . . 268
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 341
All-Wheel Drive . . . . . . . . . . . . . . . .234, 326
Antilock Brake System (ABS) . . . . . . 234 Warning Light . . . . . . . . . . . . . . . . . . . . 146
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384
Armrest Storage . . . . . . . . . . . . . . . . . . . . . 116
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Assistance Systems for Driving . . . . 260
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 254
Auto Stop Mode . . . . . . . . . . . . . . . . . . . . 150
Automatic Climate Control System . . . . . 191, 197
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Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
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INDEX 433
Automatic (cont'd)Dimming Mirrors . . . . . . . . . . . . . . . . . . . 55
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Forward Braking . . . . . . . . . . . . . . . . . . 262
Headlamp System . . . . . . . . . . . . . . . . 185
Transmission . . . . . . . . . . . . . . . . . . . . . . 231
Transmission Fluid . . . . . . . . . . . . . . . 310
Vehicle Hold Light . . . . . . . . . . . . . . . . 147
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . . . . . . . 233
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Automatic Vehicle Hold (AVH) . . . . 237
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Power Protection . . . . . . . . . . . . . . . . . . 189
Battery - North America . . . . . .324, 374
Battery Gauge High Voltage . . . . . . . . . . . . . . . . . . . . . . 135
Blade Replacement, Wiper . . . . . . . . . 327
Boost Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 136
Brake Parking, Electric . . . . . . . . . . . . . . . . . . 235
System Warning Light . . . . . . . . . . . . 145
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 Brakes (cont'd)
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Regenerative Braking . . . . . . . . . . . . . 237
Braking . . . . . . . . . . . . . . . . . . . . . . . . .207, 208 Automatic Forward . . . . . . . . . . . . . . . 262
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 264
Break-In, New Vehicle . . . . . . . . . . . . . . 216
Bulb Replacement . . . . . . . . . . . . . . . . . . 330
Headlamp Aiming . . . . . . . . . . . . . . . . 329
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 330
License Plate Lamps . . . . . . . . . . . . . . 330
Buying New Tires . . . . . . . . . . . . . . . . . . . 355C
Cadillac Premium Care
Maintenance . . . . . . . . . . . . . . . . . . . . . . 390
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 122
California
Fuel Requirements . . . . . . . . . . . . . . . . 287
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 297
California Proposition
65 Warning . . . . . . . . . . . . .297, 324, 374, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2
Capacities and Specifications . . . . . . 404 Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . . . . . 230
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Winter Driving . . . . . . . . . . . . . . . . . . . . 211
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . 117
Caution, Danger, and Warning . . . . . . . . 2
Center Console Storage . . . . . . . . . . . . . 116
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 360
Charge Cord . . . . . . . . . . . . . . . . . . . . . . . . . 279
Charging
Delay Override . . . . . . . . . . . . . . . . . . . . 275
Electrical Requirements . . . . . . . . . . 285
Plug-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Programmable . . . . . . . . . . . . . . . . . . . . 152
Utility Interruption . . . . . . . . . . . . . . . 284
Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Charging Status Screens . . . . . . . . . . . . 275
Charging System Light . . . . . . . . . . . . . 142
Check Engine Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 143
Child Restraints Infants and Young Children . . . . . . . . 98
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . . . . 103
Older Children . . . . . . . . . . . . . . . . . . . . . . 96
Securing . . . . . . . . . . . . . . . . . . . . . . 109, 111
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Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
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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
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INDEX 437
I
Ignition Positions . . . . . . . . . . . . . . . . . . . 217
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 53
IndicatorPedestrian Ahead . . . . . . . . . . . . . . . . . 147
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 147
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Information Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . 190
Infotainment System . . . . . . . . . . . . . . . 420
Instrument Cluster . . . . . . . . . . . .127, 130
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . . . . 115
Instrument Panel Overview . . . . . . . . . . . 6
Interior Rearview Mirrors . . . . . . . . . . . 56
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . 374
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . 35
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 342
Lamps Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Daytime Running (DRL) . . . . . . . . . . 185
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Exterior Controls . . . . . . . . . . . . . . . . . . 183
Exterior Lamps Off Reminder . . . . 185
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
License Plate . . . . . . . . . . . . . . . . . . . . . . 330
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 143
On Reminder . . . . . . . . . . . . . . . . . . . . . . 151
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Lane Change Alert (LCA) . . . . . . . . . . . 269
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . . . . 270
Lane Keep Assist (LKA) . . . . . . . . . . . . 271
Lane Keep Assist Light . . . . . . . . . . . . . 147
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 80
LATCH System
Replacing Parts after a Crash . . . . 109
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . . . 103
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 330 Light, Auto Stop Mode . . . . . . . . . . . . . 150
Lighter, Cigarette . . . . . . . . . . . . . . . . . . . 125
Lighting
Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Illumination Control . . . . . . . . . . . . . . 187
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Lights Airbag Readiness . . . . . . . . . . . . . . . . . 141
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 146
Automatic Vehicle Hold . . . . . . . . . . 147
Brake System Warning . . . . . . . . . . . 145
Charging System . . . . . . . . . . . . . . . . . . 142
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 143
Cruise Control . . . . . . . . . . . . . . . . . . . . . 151
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Electric Parking Brake . . . . . . . . . . . . 145
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 149
Engine Oil Pressure . . . . . . . . . . . . . . . 149
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 185
High-Beam On . . . . . . . . . . . . . . . . . . . . 151
High/Low Beam Changer . . . . . . . . . 185
Lane Keep Assist . . . . . . . . . . . . . . . . . . 147