Chevrolet sonic 2016 Owner's Manual page 306

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)
Except 1.4L Engine: Replace spark plugs. Inspect
spark plug wires.
1.4L Engine Only: Replace spark plugs. Inspect
spark plug wires.
Drain and fill engine cooling system. (4)
Visually inspect accessory drive belts. (5)
1.8L Engine Only: Replace timing belt, idler
pulley, and timing belt tensioner. (6)
Replace brake/clutch fluid. (6)
Footnotes Maintenance
Schedule Additional Required
Services - Normal
(1) Or every two years, whichever
comes first. More frequent
passenger compartment air filter
replacement may be needed if
driving in areas with heavy traffic,
poor air quality, high dust levels,
or environmental allergens.
Passenger compartment air filter
replacement may also be needed if
there is reduced airflow, window
Service and Maintenance
fogging, or odors. Your GM dealer
can help determine when to replace
the filter.
(2) Check all fuel and vapor lines
and hoses for proper hook-up,
routing, and condition.
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