Metra 72-7902 for the dash
Metra 72-6514 for the doors, one thing to note if you do the doors, they are reverse polarity so the wires on the adapter need to be swapped. + to - , - ito +.
Everything you want to know about upgrading your factory speakers whether base 6 system, Alpine or HK is all in this thread.
I've replaced all the factory Alpine speakers with JBL GX series. Just an FYI the Alpine system uses the same speakers in the doors as the base 6 speaker system. The only only difference is that the Alpine has a Factory amp pushing more power to them.
https://5thgenrams.com/community/threads/5th-gen-stock-stereo-upgrade-options.926/