Most of the time the ports are by the clutch pedal. I have never seen this model truck but I can tell you that some of the newer model trucks have switched over to a different port than the round Deutsch connectors.
Can you elaborate on this? Not questioning you but I am curious. Can you provide truck models, years and what connectors are used? I do know there are some models that use OBD2 automotive connections, but the unit in question also has a 9 pin.
I was under the impression that US standard was the 9 pin Deutsch across the board due to OBD standards.
OK was talking to the owner of that truck and turns out it it is just OBD connector. Sorry I had no idea that they would put that type connector in a new truck. Figured everything would be round now a days. So to the OP it is probably OBD2. Do you see something like this under the dash near clutch pedal?