has anybody installed a factory sub and amp on the other side of the car? i'm looking for more bass without sacrificing any cargo space and i figured the same factory setup on the opposite side as well would be perfect....

 

before I would do that I would modify the stock setup. The stock box is horrible and the stock sub isn't much better. Bu upgrading both of these it's possible to get more bass in just the stock location.

 

well, the gas tank, onstar, and xm are on that side (if equipped) so you might have a challenge fitting another woofer in there with enough volume.

I have the AA5 option and have my amps mounted where the windows would go. having no problems at all with that, but i have some pictures (click my camera) of that area with the panel off so you can better see what you're dealing with.