Chevrolet Sonic 2014 Owner's Manual page 136

136 Climate control
Air vents
Adjustable air vents
At least one air vent must be open
while cooling is on in order to prevent
the evaporator from icing up due to
lack of air movement.
The central vent is not closed
completely.
Direct the flow of air by tilting and
swiveling the slats.
Turn the knob anti-clockwise to open
the side vents, and rotate it to the
direction you want.
If you do not want the flow, turn the
knob clockwise.
9 Warning
Do not attach any objects to the
slats of the air vents. Risk of
damage and injury in case of an
accident.
Fixed air vents
Additional air vents are located
beneath the windscreen and front
door windows and in the foot wells.