I see by your profile, you drive the performance edition, so I assume you have the Bose System. Your car has a fuse box under the rear seat. If you check fuse #38, it powers the amplifier. I'd start with that.
Have you checked all the wiring that plugs into the amp?? Maybe the plug for the speakers has came loose...Yes correct I do have the Bose system. I have checked the amplifier fuse and it's good. If it was bad the radio won't work at all. I'm guessing I need a new amplifier, I don't see how all speakers could just stop working at once.