This is an older thread, but this info should be helpful. There aren't much information about this, or it's not easy to search online.
You have the NON JBL option, and have an aftermarket head unit, and only want to upgrade the speakers only:
crutchfield.com is a great resource to find the location and sizes of your speakers.
- Corner dash: 2.5 inch midrange speakers
- 6.5 inch speaker for front door, with Scosche SAT69 adapter plate
- 6.5 inch speaker for rear door
If you have GPS, you might have the JBL premium stereo, which is harder to upgrade. I have the Limited with GPS and JBL so there are a lot of speakers, and some are weird sizes and ohms. Go to crutchfield.com and look up your vehicle and it should tell you what your speaker sizes and amp options are.
For me, I would get:
- 6.5 inch speaker for front door, with Scosche SAT69 adapter plate
- I'm ignoring the center channel.
- 6.5 inch speakers on the rear doors.
- There are 2.5inch tweeters in the corners of the dash, and rear pillars.
- 1 woofer in the rear corner.
- Amp is under one of the seats.