Ok, so I'm looking to upgrade my stereo, frankly the stock one is just decent. I'm looking at chevrolets website and it says premium system is 8 speakers including 2 subs. Last night I was looking in the trunk measuring stuff and my count is 6 speakers. I got the A piller tweeters, 6.5s in the front doors, and 2 what appear to be 6X9 in the rear deck? I got nothing in the rear doors. Are the subs located elsewhere? I do have the 6 disc indash changer which should have the 8 speaker set up. Let me guess the general cheaped out on the '09's and the new premium system is a 6 speaker setup? Anyone got a clue on this? Did I just miss the "subs"?