I can't really answer your specific questions.... but you'd probably be better off just getting an add-on aux in... go to www.sonicelectronix.com, look up ISGM573.
It's an "isimple" (aka peripheral) ipod & aux-in adaptor that plugs into your stock headunit with no splicing!
$105 shipped, got in about 30 hours from that website.
you can also check out www.pac-audio.com and see some other options -- you might be able to get an aux-in only (w/o ipod control) for a little less...
But if you swap head units, you gotta pay for that, and pay for any dealer programming (if necessary), and worry about your DIC. no one wants to worry about their DIC, right?
It's an "isimple" (aka peripheral) ipod & aux-in adaptor that plugs into your stock headunit with no splicing!
$105 shipped, got in about 30 hours from that website.
you can also check out www.pac-audio.com and see some other options -- you might be able to get an aux-in only (w/o ipod control) for a little less...
But if you swap head units, you gotta pay for that, and pay for any dealer programming (if necessary), and worry about your DIC. no one wants to worry about their DIC, right?