tlarwa...have you determined the proper speaker size? I have a 2001 Catera with the NON-Bose stereo system. I do see that the cutouts in the doors are different sizes in the front and back. Metra says 6.5" front and back. I've seen other answers. What about the amount of space allowed between the speaker and the speaker grill or door panel? Most aftermarket speakers have the little tweeter that sticks out about a 1/2" or more.