Actually I haven't had a chance to take it to the dealer yet. I just thought since I have several gauges I would see if I could connect to the diagnostic ports and compare the output pressures to what the manual says. The connectors appear to be a poppet style male connector. I measured the O.D. of the tip with calipers and the it measures .450". I have been trying to find something that shows the OD of the male tip to determine what common size they are but haven't found anything yet. The plan is to still take it to the dealer but thought having the ability to check these pressures in the future might come in handy.