2004 Quest and factory head unit

Is there any way to hook up sirius radio to factory radio?  The head unit is made by clarion.  I am trying to stay away from using a fm mod. due to the static.  I would much rather have a direct connect.  I have a sat. button on the radio but it wasn't prewired for sat radio.  The buton being on the radio makes me think there is a way to do it but I need a diagram showing the head unit wiring.  There are four wires behind the information center where the radio is located that are capped off and do not go anywhere.  f anyone has any info on this topic it would be very appreciated..   Thanks,      Sooiecitybax123

Ask your local Nissan dealership

the company i currently work for does alot of work for local nissan dealerships and we will be installing there factory sat radio kits for them soon, but for the time being the shop techs are doing it and supposedly it takes them 6 hours, i have looked over a kit and it was pretty comprehensive, but there was something missing out of the kit that we had a question about, i do not remeber exactly what it was because it was a while ago, but i will gather some information for you tomorrow and let you know, my reccomendation would be to contact a local audio shop that you trust and have them do the install as compared to dealship charges becuase they are out of control.