Anyone know how to remove the rear deck speaker grills to get access to the 8" speakers. I want to upgrade them.

I believe you have to remove the Carpeted panel to gain access to the speakers.

Yeah, you have to remove the teh carpeted cover. It's a bit of a PITA, but let me know if you need details, I think I remember most of what I did. I did not however remove the speakers, I just soldered leads to their terminals for my amp install. The speaker brackets are glued to the steel framwork of the rear deck. I tried to remove them for easier access, but was unable.