Will Pay For Info Delphi Nav Install

I Have An 04 Silverado Ss That Came Stock With The Six Disk Indash Dose Unit With The Amp And Sub Junk.....anyway Decided To Add The Nav Unit That Comes In Denalis And Caddi....installed Umit Today. All Nav Fetures Work Great Voice Promts And Stuff ....but There Is No Other Audio ...cd,xm,fm If Anyone Has Successfully Completed This Install Please Reply ....i Would Even Be Willing To Pay For This Info

Thanks,
Dave