I’m not sure I understand the OP’s problem completely, but I have no problem getting GPS (Apple Maps) audio cues over the car speakers regardless if I’m listening to Bluetooth audio from my phone or just listening to regular FM in my car.
There is an option that will only show up under Apple...
I decided to try this from Square Jellyfish - http://www.squarejellyfish.com/jelly-grip-car-vent-mount.html
I originally went with the Kenu Airframe+ but the recessed vents on the CX-5 made it difficult to attach the phone without removing the Airframe from the vent first, and even then it...