Can Pioneer Premium Sound by added - Chevy HHR Network

I got a black sunroofed car w/boost gauge but had to live w/o the Pioneer Premiun sound. This factory headunit is full of features but sounds lame. I never heard the Pioneer option but it's got to be better than this. Does it pay to try to upgrade to the optional factory ... Member #: 5806. Posts: 114. Check out my gallery. I have the factory 7 speaker system and it's still lame. I replaced just the two front door speakers with aftermarket and it is a huge improvement. ...