I have a 2006 Chevy HHR without Pioneer audio system and without Onstar. My stock audio system includes 4 Speakers and 2 Tweeters, but does not include a sub, I was curious can I add a sub?
2006 Chevy HHR
Without Pioneer audio system
Without Onstar
4 5-1/4" Speakers
2 3/4" Tweeters
No Sub