Controlling pandora through my gmc truck

[AC Question]

with my old phone(droid razor maxx) when i selected Pandora on my truck all my controls would be through truck, now with my new droid moto z when i select Pandora it plays through truck but does it through media player and i have no control of Pandora, can't change channels or nothing. It plays through my truck through Bluetooth, How do i get this new phone to play like the old one did? MY truck is 2015 GMC.