Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
SERVICE AND MAINTENANCE 313
Maintenance Schedule
Additional Required Services -
Normal12 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. (3.0L
Twin Turbo Engine)@ @
Replace spark plugs. Inspect spark plug wires. (3.6L
Engine)@
Drain and fill engine cooling system. (5)@
Change transfer case fluid. (6)@
Change front and rear axle fluid.@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
314 SERVICE AND MAINTENANCE
Footnotes—Maintenance Schedule
Additional Required Services -
Normal
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0284.
(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 two 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 System0255.
(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. See Brake Fluid 0262.
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
SERVICE AND MAINTENANCE 315
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. (3.0L
Twin Turbo Engine)@ @
Replace spark plugs. Inspect spark plug wires. (3.6L
Engine)@
Change automatic transmission fluid and filter.@@@
Change transfer case fluid. (5)@@@
Change front and rear axle fluid.@@@
Drain and fill engine cooling system. (6)@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
316 SERVICE AND MAINTENANCE
Footnotes—Maintenance Schedule
Additional Required Services -
Severe
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation0284.
(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 two 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 System0255.
(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. See Brake Fluid 0262.Special Application
Services
Severe Conditions Requiring
More Frequent Maintenance
.
Public service, military,
or commercial use vehicles to
include the following:
‐Ambulances, police cars and
emergency rescue vehicles.
‐ Civilian vehicles such as light
duty pick-up trucks, SUVs and
passenger cars that are used in
military applications.
‐ Recovery vehicles such as tow
trucks and flatbed single vehicle
carriers or any vehicle that is
consistently used in towing
trailers or other loads.
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
SERVICE AND MAINTENANCE 319
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer.Part GM Part Number ACDelco Part Number
Engine Air Cleaner/Filter
3.0L V6 Twin Turbo Engine (Driver Side) 23441383 A3207C
3.0L V6 Twin Turbo Engine (Passenger Side) 23450879 A3206C
3.6L V6 Engine 23458700 A3204C
Engine Oil Filter
3.0L V6 Twin Turbo Engine 19330000 PF63E
3.6L V6 Engine 19330000 PF63E
Passenger Compartment Air Filter 13508023 CF185
Spark Plugs 3.0L V6 Twin Turbo Engine 12650283 41-131
3.6L V6 Engine 12646780 41-130
Wiper Blades
Driver Side –60 cm (23.62 in) 13227404 —
Passenger Side –45 cm (17.72 in) 25882578 —
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
322 TECHNICAL DATA
Vehicle Data
Capacities and Specifications
The following approximate capacities are given in metric and English conversions. SeeRecommended Fluids and Lubricants
0 318 for more information.
Application Capacities
Metric English
Air Conditioning Refrigerant For the air conditioning system refrigerant type and charge amount, see the refrigerant label under thehood. See your dealer for more information.
Cooling System –Engine
3.0L V6 Twin Turbo Engine 10.4 L 11.0 qt
3.0L V6 Twin Turbo Engine with Rear A/C 12.2 L 12.9 qt
3.0L V6 Twin Turbo Engine with Rear A/C and Auxiliary
Radiator 13.1 L 13.8 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
Cooling System –Twin Turbo
3.0L V6 Engine Intercoolers 3.2 L 3.4 qt
Engine Oil with Filter 5.7 L 6.0 qt
Fuel Tank 72.7 L 19.2 gal
Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
INDEX 329
Coolant (cont'd)Engine Temperature Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .171, 178
Cooling System . . . . . . . . . . . . . . . . . . . . . 255
Engine Messages . . . . . . . . . . . . . . . . . . 143
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 167
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 211 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Cruise Control, Adaptive . . . . . . . . . . . 213
D
Danger, Warning, and Caution . . . . . . . . 2
Data Recorders, Event . . . . . . . . . . . . . . 325
Daytime Running Lamps (DRL) . . . 165
Defensive Driving . . . . . . . . . . . . . . . . . . . 185
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 37
Distracted Driving . . . . . . . . . . . . . . . . . . 185
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 167
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 135
Ajar Messages . . . . . . . . . . . . . . . . . . . . . 143
Delayed Locking . . . . . . . . . . . . . . . . . . . . 37
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 37
Rear Seat Pass-Through . . . . . . . . . . . . 67
Drive Belt Routing, Engine . . . . . . . . . 324 Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . 204, 264
Driver Assistance Systems . . . . . . . . . 221
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 136
Driver Mode Control . . . . . . . . . . . . . . . . 209
Driving Assistance Systems . . . . . . . . . . . . . . . 228
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 185
For Better Fuel Economy . . . . . . . . . . . 26
Hill and Mountain Roads . . . . . . . . 188
If the Vehicle is Stuck . . . . . . . . . . . . 190
Loss of Control . . . . . . . . . . . . . . . . . . . . 187
Off-Road Recovery . . . . . . . . . . . . . . . . 187
Vehicle Load Limits . . . . . . . . . . . . . . 191
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 188
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
E
Electric Parking Brake . . . . . . . . . . . . . . 205
Electric Parking Brake Light . . . . . . . 130
Electrical Equipment, Add-On . . . . . 243
Electrical SystemEngine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Fuses and Circuit Breakers . . . . . . . 269
Instrument Panel Fuse Block . . . . 272
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 268 Electrical System (cont'd)
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Engine
Air Cleaner/Filter . . . . . . . . . . . . . . . . . 254
Check and Service EngineSoon Light . . . . . . . . . . . . . . . . . . . . . . . 127
Compartment Overview . . . . . . . . . . 247
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Coolant Temperature Gauge . . . . . 124
Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . 132
Cooling System . . . . . . . . . . . . . . . . . . . 255
Cooling System Messages . . . . . . . . 143
Drive Belt Routing . . . . . . . . . . . . . . . . 324
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Oil Life System . . . . . . . . . . . . . . . . . . . . 252
Oil Messages . . . . . . . . . . . . . . . . . . . . . . 144
Oil Pressure Gauge . . . . . . . . . . . . . . . . 123
Oil Pressure Light . . . . . . . . . . . . . . . . . 133
Overheating . . . . . . . . . . . . . . . . . . . . . . . 259
Power Messages . . . . . . . . . . . . . . . . . . 144
Running While Parked . . . . . . . . . . . 201
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Engine Oil Temperature Gauge . . . . . . . . . . . . . . . 123
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 168
Event Data Recorders . . . . . . . . . . . . . . 325