[Johnny B]

I'm not an audiophile, that said I would upgrade the door speakers first. At the same time maybe use a bit of Dynamat. In my experience, unless you get the premium sound systems the stock speakers are really bad. I still remember when I replaced my speakers in my old Grand Prix, just putting in $150 worth of speakers was a huge improvement. The stock speakers were so cheap I'm not even sure if I could have bought them aftermarket.
I can hardly wait for the "the nuclear option" suggestions.

 

[Nicolás]

I let the original equipment and put a Pioner stereo with a 3-ways Focal in the front and 6´´ x 9´´ in the back. New audio fos the Cruze