[johnnydicamillo]

I am still working on a project that involves communicating with the vehicle systems. To my understanding these GM cars don't have a can high and low but a single wire system. Does anyone know where the pin is for the GMLan and ground? I am assuming I could access it in the obd2 port since trifecta manages to write to the ecm through that port.

 

[ChevyGuy]

The manual show a high speed bus and the low speed bus. I'm not sure about a single-wire bus.