I guess you bought it used and do not have the spec sheet that came with the car? One site said it would say "premium" on the speakers, but I think mine says sereo even though it is premium. The amp is above the floor light that would be right above the passengere's right knee.
Hopefully someone will answer who knows the answer.
If not, send me an email and I'll run out to the garage when I get home.
I think my new email is:
junk1@twcny.rr.com