Audio Systems: Adding iPod, gmc envoy, device plugs

Question
I have a 2005 GMC Envoy with the factory Bose 6 cd changer radio and I want to add a iPod. What is the latest and best connection to be able to use it with the factory steering wheel controls?
Thanks!!

Answer
there is no need to remove the radio, this device plugs into the xm radio ( right side of glove box )

full ipod iphone  controls from gmc radio,

http://www.oemautosound.com/pc-512-187-pie-ipod-interface-with-auxiliary-input-x...