I just bought an '06 Tahoe and have diccovered that it has no sub woofer. It has the Bose factory system with the rear entertainment and dvd. I'd definitely like to add a subwoofer but I want to keep the "factory" look and I have some questions maybe somebody can help with: Would this sub be in the back because of the rear entertainment or in the center console? Can I just go to the dealer and buy the sub that would have come in the truck and is the wiring already in place? Does anybody make an after market that will fit where the factory install would have been?