GMC Cadillac XT4 2019 Owner's Manual page 316

SERVICE AND MAINTENANCE 315
Maintenance Schedule
Additional Required Services -
Severe
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.
Change automatic transmission fluid and filter.
Drain and fill engine cooling system. (5)
Visually inspect accessory drive belts. (6)
Replace brake fluid. (7)
Replace windshield wiper blades. (8)
Replace hood and/or body lift support gas struts.