Chevrolet 2013 Sonic Owner's Manual page 44

2-18 Keys, Doors, and Windows
Vent: Press and hold the front of
the switch to vent the sunroof.
Manually close the sunshade.
The sunroof will not operate if the
vehicle has an electrical failure.
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.