EE to EE, bypass the bumper connector and you will see what plugs into the trailer/camera connector and all will make sense.TRIAX connector with BNC ends that carry SDI. unlimited options of ability to convert signal to whatever signal carrying you like. BNC to cat5 or a/d converter the options of customizing are endless.the signal is SDI, The issue I have yet to discover without more testing is these cameras gm has on the trucks. I think they are higher resolution (hd so they call them) but that is being cleaned and filtered at higher resolution at wherever they are plugged into. More time and testing will tell but the GM camera seems nothing special, a $10 camera at best.