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I ran the CEL, VSS and Oil pressures off of the bulkhead connector. I realized after installing the BIM module I didn't have to use the CEL and VSS outputs of the bulkhead but I connected those wires (and the oil pressure wire) to the appropriate SND input on the control panel. I would use a stock oil press sender and connect it to the GMPP oil press plug (2 wires, grey and black) and use CAN for the sending unit type on the DD setup menu. Here is a picture of my OP sender. I am starting to swap in the new HDX gauges this week so I will post up pics of how I ran those wires specifically (installed thrm 3 years ago).