So, I was driving last night with an address programmed (satellite station on) and once she started calling out instructions, I noticed that the radio volume didn't drop back/down. Is that a setting? or a problem? My last couple vehicles would cut the radio when a nav message was being announced then bring the radio volume back up.

 

mine doesnt do it[or is not set to do it]. thank God. dont remember seeing a setting for that.

 

You'll have to turn the Navigation system's voice volume up (in 'Setup') so you can hear it over wherever you typically listen to your radio's volume.