Buick 2015 Regal Owner's Manual page 348

Service and Maintenance 11-7
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)
Replace engine air cleaner filter. (3)
Change automatic transmission fluid.
Change manual transmission fluid.
Except 2.0L Engine: Replace spark plugs. Inspect
spark plug wires.
2.0L Engine Only: Replace spark plugs. Inspect
spark plug wires.
Drain and fill engine cooling system. (4)
Except with eAssist: Visually inspect accessory
drive belts. (5)
Vehicles with eAssist: Visually inspect accessory
drive belts. (5)
Replace brake/clutch fluid. (6)