03 cavalier factory stereo specs?????

Here's the deal, i wanted to replace some of the speakers in my 03 cavalier ls sport, but i wanted to keep the factory stereo/cd/tape player in it. I do have the top notch factory stereo system (XM radio, cd, tape, subs) and i was just trying to find out how much power the unit puts out to the speakers and if there was an amp that powers the subs that came in it. I also have not been able to find where the subs are located, if anyone could let me know any of the above information it would be greatly appreciated.
Thanks,
Aaron

its not just me! i got the one with subs too, and i cant find them, and believe me ive looked. subs dont have to be your typical 10s or 12s, they could be 4s or something. but i havent a clue where they are at o.o

I got the same system. I think they lied to us, I don't know. :p