You've got a good mystery there. The module is a Blue Streak brand which is aftermarket replacement....you might take the 7030 number on it (or other number if available) and go to someone who sells Blue Streak to cross it to a specific car/engine/trans/induction combo. It should match a GM color code and certainly matches the pinout for that specific application.

Usually the orange wires are hot, GM never fuses a ground wire and does not use orange for ground. However, you need a diagram to determine what these wires feed....