04 gm stereo suggestions
 

I just got an 04 Gran Marquis. I want to upgrade the audio system. I want to put in new speakers, potential sub in trunk and new head unit. I'd like to see what others have done with their audio units and see how complex it is to accomplish.

What are the specs on speaker sizes for the doors and in the back? Will 6x9's fit in the back? How hard is it to wire. Has anybody re-upgraded and they are looking to get rid of their previous unit? How hard are the door panels to remove? It looks like there is alot of space in the dash for a new unit. Is it a pain to remove and reassemble?

Thanks in advance for any help.

regards

ken