Originally posted by APT:
What do you mean "turn into?" :p
Crutchfield is no help to find out the stock size. They don't list any replacement speakers for your car. It does say front door and rear deck, though.
Iceheart, do you know the stock speaker sizes?
That Caddy has got a Bose system in it with all of the dumb quirks that go with it (external amp, odd ohm speakers, and goofy HU).
It'll need a near complete system rewire for adding aftermarket speakers and a new HU, not to mention adding subs/amp.