Cadillac ATS 2018 Owner's Manual page 341

SERVICE AND MAINTENANCE 339
Maintenance Schedule
Additional Required Services -
Severe
Rotate tires and perform Required Services. Check
engine oil level and oil life percentage. Change
engine oil and filter, if needed.
Replace passenger compartment air filter. (1)
Inspect evaporative control system. (2)
ATS-V Only: Replace engine air cleaner filter. (3)
Except ATS-V: Replace engine air cleaner filter. (3)
Change automatic transmission fluid and filter.
Change manual transmission fluid.
Change transfer case fluid, if equipped with
AWD. (4)
Change rear axle fluid, if equipped with limited slip
differential. (4)
Change rear axle fluid, without limited slip
differential. (4)
2.0L or 3.6L Twin Turbo Engine Only: Replace spark
plugs. Inspect spark plug wires.
3.6L V6 Engine Only: Replace spark plugs. Inspect
spark plug wires.
Drain and fill engine cooling system. (5)
Visually inspect accessory drive belts. (6)
Replace brake fluid, if equipped with an automatic
transmission. (7)
Replace brake/clutch fluid, if equipped with a
manual transmission. (8)