Cadillac 2016 CT6 Owner's Manual page 347

346 Service and Maintenance
Maintenance Schedule
Additional Required
Services - Normal
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)
Drain and fill engine cooling system. (5)
Change transfer case fluid, if equipped with
AWD. (6)
Visually inspect accessory drive belts. (7)
Replace brake fluid. (8)
Footnotes Maintenance
Schedule Additional Required
Services - Normal
(1) Vehicles with different size front
and rear tires do not have tire
rotation. See Tire Rotation 0 313.
(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 airflow, window
fogging, or odors. Your GM dealer
can help determine when to replace
the filter.