note that the Ipod plugs in using the headphone jack, not the dock connector at the bottom, resulting in poor sound quality. There is a cable that hooks the Ipod up to the AUX input of the factory radio (I hooked mine up already).
There is some debate on here as to whether the upgraded stereos have the AUX port. All i can say is that the basic, 1 CD Hummer radio has an AUX input at the back (that is accessed by pressing the BAND button repeatedly)
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