Chevrolet Volt 2016 Owner's Manual page 321

320 Service and Maintenance
Maintenance Schedule
Additional Required
Services - Normal
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 electric drive unit fluid.
Replace spark plugs. Inspect spark plug wires.
Drain and fill engine, power electronics, and high
voltage battery cooling systems. (4)
Visually inspect accessory drive belts. (5)
Replace brake fluid. (6)