Okay so I got everything working from non-nav to 12" ( all knobs and buttons on the screen and the screen starts up every time ) using the Windows version of AlfaOBD.
If you had the 8.4 Nav unit to start you may only need to disable Cabin NET-ICS Integrated Center Stack set as Not enabled.
1. Start by connecting to the Body Computer like below. Click connect.
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2. Once connected click the Advanced mode button and under modification: (RU) PACIFICA : MY2017 PowerNet.
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3. Switch to Active Diagnostics tab Car Configuration then Cabin Net-DCSD Display Screen Module set as Enabled.
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4. Last select Cabin NET-ICS Integrated Center Stack set as Not enabled. Verify all setting took and pull the radio fuse or unhook the battery to reset the radio let it boot up. Shut the truck off and let it sit 30 mins or so and the radio should pull the setting from your trucks BCM.
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