2007 Chevrolet Aveo Owner's Manual - Page 194

To use a portable audio player, connect a 3.5 mm (1/8 inch) cable to the radio's front auxiliary input jack. When a device is connected, turn the portable audio player on. Press and hold the radio AM/AUX button for more than two seconds or until audio from the device begins to play over the car speakers. Radio with CD (MP3/WMA) O (Power/Volume): Turn this knob clockwise or counterclockwise to increase or decrease the volume of the portable player. You may need to do additional volume adjustments from the portable device if the volume is not loud or soft enough. AM/AUX: Press this button to listen to the radio while a portable audio device is playing. The portable audio device will continue playing, so you may want to stop it or turn it off. Playing the Radio O (Power/Volume): Press and release this knob to turn the system on or off. Turn the power/volume knob clockwise or counterclockwise to increase or decrease the volume. Press this button for longer than two seconds to mute the system. 194