Quote Originally Posted by o4aveohb
will these pillars fit the 04 aveo? Also it has the tweeter built in? Or just a hole for the tweeter?
Quick answer. No, it does not come with the tweeter built in, just the built in space for the tweeter. Personal view: The stock tweeters kinda suck anyway. I just ripped mine out, and replaced them with a set of Blaupunkt PC40's (Blaupunkt Components with 4" drivers, and 1" tweeters).

The stock GM speakers are craptastic at best, They are standard full range cone speakers. If you still have the stock speakers in your car, I would suggest replacing them with some better mid-high grade components, or coaxials. (stay away from triaxials, they are often worse than the stock speakers)

Whether you are running a stock head, or an aftermarket one, a good set of speakers can make all the difference in the world. That is just my opinion, others may disagree, but I am betting most won't.