haha yes the console has the sub and amp I need to get them stripped out.
As for write up, i am using Crankshaft-NG project as a base there are write ups on installing the software on the pi, the full car integration been a little more tricky few YouTube videos and time checking there reddit I was able to build that black control box it has a timer curcit, relays and a couple of step down converters.
I wanna get it installed and working in my tahoe before before I try and do a write up for how I did it