Where is the sub-woofer in a 2005 GMC Sierra with the Bose option?

Your 8" Bose Subwoofer is located in your center console, when you turn your music up loud, place your hand on either of the sidewalls, you will feel it. I used to have a 2005 Silverado 1500, 5.3L Stage 2 Chip, leather seats, all the works.. what I'm getting at is, that is a nice stereo setup, do you have the 6 disc changer in dash as well?