2017 CADILLAC CT6 Owners Manual

Cadillac CT6 Owner Manual (GMNA-Localizing-MidEast-10293390) - 2017 -
CRC - 6/21/16
312 SERVICE AND MAINTENANCE
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. SeeEngine Oil Life
System 0252.
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 Rotation0284.
. Check engine oil level and oil
life percentage. If needed, change
engine oil and filter, and reset oil
life system. See Engine Oil0250
and Engine Oil Life System 0252.
. Check engine coolant level. See
Engine Coolant 0256.
. Check windshield washer fluid
level. See Washer Fluid 0260.
. Visually inspect windshield wiper
blades for wear, cracking,
or contamination. See Exterior
Care 0301. Replace worn or
damaged wiper blades. See Wiper
Blade Replacement 0265. .
Check tire inflation pressures. See
Tire Pressure 0279.
. Inspect tire wear. See Tire
Inspection 0284.
. Visually check for fluid leaks.
. Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter 0254.
. Inspect brake system. See Exterior
Care 0301.
. Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of wear.
See Exterior Care 0301.
. Check restraint system
components. See Safety System
Check 072.
. 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 0301.
. Check starter switch. See Starter
Switch Check 0264. .
Check automatic transmission
shift lock control function. See
Automatic Transmission Shift Lock
Control Function Check 0264.
. Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check 0265.
. 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. See your dealer if service is
required.
. Inspect sunroof track and seal,
if equipped. See Sunroof052.

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
318 SERVICE AND MAINTENANCE
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
UsageFluid/Lubricant
Automatic Transmission DEXRON
®-HP Automatic Transmission Fluid (GM Part No. 19331925).
Chassis Lubrication Chassis Lubricant (GM Part No. 12377985) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL
®Coolant. See
Engine Coolant 0256.
Engine Oil Engine oil meeting the dexos1™ specification of the proper SAE viscosity grade.
ACDelco dexos1 Synthetic Blend is recommended. See Engine Oil0250.
Hood Latch Assembly, Secondary Latch,
Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol (GM Part No. 89021668) or lubricant meeting
requirements of NLGI #2, Category LB or GC-LB.
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid (GM Part No. 19299818).
Key Lock Cylinders, Hood, and Door Hinges Multi-Purpose Lubricant, Superlube (GM Part No. 12346241).
Rear Axle (Non-Limited Slip Differential) SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88863089).
Transfer Case (All-Wheel Drive) Transfer Case Fluid (GM Part No. 19331044). Weatherstrip Conditioning Weatherstrip Lubricant (GM Part No. 3634770) or Dielectric Silicone Grease (GM Part No. 12345579).
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.

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 —