how to google map to car voice while driving direction

 

2010 and later can connect with Bluetooth, press AUX.
You can now play Pandora and/or iTunes and the phone
will automatically segue between phone calls and Map
call outs and back to music.

Earlier models can connect with the 3.5 mm minijack.
Same function but doesn't allow steering wheel control
of the music tracks or screen display of what's playing.

If you want radio stations then use iHeart Radio instead
of the Pandora/iTunes.