GM Class 2 communication operates between which voltage levels?

GM Class 2 communication operates at voltage levels between 0 and 7 volts. This range is significant because it allows for reliable communication between various modules in a vehicle's network while ensuring that signal integrity is maintained and that the communication system is robust against electrical noise. The choice of 0 to 7 volts is designed to provide a clear distinction between the low state (0 volts) and the high state (typically closer to 5 or 7 volts), facilitating effective data transmission. This is critical in automotive applications to ensure that diagnostic, control, and information systems can communicate seamlessly without interference.