2003 yukon with bose

i would like 2 change the cd palyer in my 2003 yukon but leave all the factory bose speakers intact i dont have on-star and i dont really mind if i lose the door chime. can i just buy a regular gm harness and tap into the rem turn on on the bose amp or do i need one of the special adapters they make 2 put an aftermarket radio in and still retain the bose??

Use the right harness and keep your door chime. This will also give you   your accessory wire because there is no accessory in the harness. Scosche DCGM09 NOTE: If using the DCGM09 with a Bose Audio system, connect the RCA from your new radio to the RCA ends of the DCGM09. If using the DCGM09 with a non-Bose audio system, simply cut off the DCGM09's RCA connectors and splice the speaker wires from your new radio to the newly-created speaker wires of the DCGM09. Bose amplifiers require a low-level input for proper signal balance between a high power aftermarket radio and the low-level input of a Bose amplifier. Using the RCA inputs from your radio with a non-Bose audio system will result in poor and very quiet sound quality.

well what if i want to add a subwoofer but the new aftermarket deck only has front and rear outputs if i buy the scosche harness and plug in the rcas how will i make that work?