I don't want to hear anything but music in any vehicle. No commercials, no commentary and definitely no annoying disconnected voice telling me how to drive. 58 TRUK head unit has a thumb drive with 50Gb of music loaded, that is all I need.
The 09 GMC has Bluetooth for phone only, I have a $15 Bluetooth receiver plugged in the aux port for music. The GMC came with Sirius and turn by turn navigation, I used both one time and cancelled both. Satellite radio is mostly commercials and navigation without a screen is worthless when muted.