'05 Aux button
I'd assume that if the single CD changer has an aux input, it probably requires some sort of adapter to work with a "normal" headphone or RCA cable.
Last time I looked, the adapters were about $80, at which point you might as well just get a $100 aftermarket stereo with aux input on the front.
Just my $0.02.
http://www.pie.net/index.htm
They are easy to install. The dash has to be removed and the radio pulled but it is much easier than it sounds. The dash just pulls off....no tools needed. The hardest part is unplugging all of the connectors from the back of the dash. Once you have unplugged everything, the dash just pulls off. JUST a heads up though, the easiest way to do it if you have an auto tranny, is to turn the key on and pull the shifter all the way down into 1 and tilt your steering column all the way down. Also, it is a good idea to remove the negative battery cable. I have done it both ways and haven't had any problems though. If I remember correctly, the radio bolts are 7mm and easily removed with a nut driver. Then you just need to unplug the connectors from the rear of the radio and hook up the P.I.E. adapter.
There's a write up with pics in the SD tech folder at the bottom of the page in a post by Krewat with a link to the write up. It really isn't difficult. I had the dash out of mine a few weeks ago installing a new SIRIUS radio.







