Chevrolet Corvette 2015 Owner's Manual page 336

Service and Maintenance 11-5
Maintenance Schedule
Additional Required
Services - Normal
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)
LT1 Engine: Replace spark plugs. Inspect spark
plug wires.
LT4 Supercharged Engine: Replace spark plugs.
Inspect spark plug wires.
Drain and fill engine cooling system. (4)
Change rear axle fluid.
Visually inspect accessory drive belts. (5)
Replace brake fluid. (6)
Replace clutch fluid. (6)