I have a 08 ltz and im trying to upgrade the whole sound system. I talked to a tech today about some speakers from polk audio but Im on the fence about polk audio or anything with the sound system. My real question is what are my best options, how many speakers are in my car. Also Im trying to find a good double din that's android friendly. Im trying to get rid of any factory sound equipment because in my opinion chevy's bose sound system sucks.