I'm not sure what aftermarket solution you have. If you have one of the USA Spec solutions, here is how to set it up:
Manual:
http://usaspec.com/userfiles/editor/fil ... webuse.pdf
Steps:
- Play the 1st Track of any Artist folder on your iPod or iPhone
- Pause the iPod or iPhone after the 1st track is played for a few seconds
- Connect iPod or iPhone to interface adaptor
- Turn car key to ACC power ON and turn the radio ON
- Switch radio to XM (or Sirius) band by pushing the RADIO or SAT button
- iPod music will play through the radio
- If radio has a Present A-B-C button, select "A" preset group by pushing "preset A-B-C" button
- If radio has SAT1 or SAT2 buttons then push the SAT1 button
- When radio displays CH1, push and hold preset button #1 for about 3 seconds or until a beep is heard
- Push the Track Up button to CH2
- When the radio displays CH2, push and hold the preset button #2 for about 3 seconds or until a beep is heard
- Repeat the last two steps to setup CH3 to CH6 and Preset #3 to Preset #6
Then you can test it. If setup properly, when you are on the correct preset settings:
#1 - Playlist Folders
#2 - Artist Folders
#3 - Album Folders
#4 - All Songs Folder
#5 - iPod Direct
#6 - RCA AUX