Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance and engine protection.
Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.
Chevrolet Sonic. All-Season Tires
This vehicle may come with all-season tires. These tires are designed to provide
good overall performance on most road surfaces and weather conditions. Original
equipment tires designed to GM's sp ...
Chevrolet Sonic. Passenger Airbag Status Indicator
The vehicle has a passenger sensing system. See Passenger Sensing
System for important safety information. The instrument panel has a
passenger airbag
status indicator.
United States
...
Chevrolet Sonic. Starting Procedure
1. With your foot off the accelerator pedal, turn the ignition to START. When
the engine cranks, let go of the key. The idle speed will go down as the engine
gets warm.
The vehicle has a Computer ...