Sorry this isn't really new information but presented in a different manner. I took the Bus information from the chiltons manual and drew it up in a diagram for a quick reference. I also made a visual pin out for the 2 OBDII style ports in the car. Info that has been posted here before but sometimes a Picture is easier to see.
I've tried to attached the port pinouts. The bus chart I left on my blog so I can update it if corrections are needed.
http://e46canbus.blogspot.com/2018/09/2011-chevy-volt-bus-systems.html
Thaniel

I've tried to attached the port pinouts. The bus chart I left on my blog so I can update it if corrections are needed.
http://e46canbus.blogspot.com/2018/09/2011-chevy-volt-bus-systems.html
Thaniel