2007 GMC Yukon Owner's Manual - Page 294

Using the Auxiliary Input Jack Your radio system has an auxiliary input jack located on the lower right side of the faceplate. This is not an audio output; do not plug the headphone set into the front auxiliary input jack. You can however, connect an external audio device such as an iPod, laptop computer, MP3 player, CD player, or cassette tape player, etc. to the auxiliary input jack for use as another source for audio listening. 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, press the radio CD/AUX button to begin playing audio from the device over the car speakers. O (Power/Volume): Turn this knob clockwise to increase or counterclockwise to decrease the volume of the portable player. You may need to do additional volume adjustments from the portable device if the volume does not go loud or soft enough. BAND: Press this button to listen to the radio when a portable audio device is playing. The portable audio device will continue playing, so you may want to stop it or turn it off. CD/AUX (CD/Auxiliary): Press this button to play a CD when a portable audio device is playing. Press this button again and the system will begin playing audio from the connected portable audio player. If a portable audio player is not connected, "no input device found" will be displayed. 294