I use to have a cummins and I was just about to get the watch dog but I had to sell my truck because I lost my job anyways it tell u everything u need besides your pyro (egt) but u can get a add on for that
i got the bully dog watchdog and it was way to small. i couldn't read the gages while i was driving as the fonts are to small. i got the edge insight cts. way better choice but with both units limited on what they can read for gauges and they wont see codes on our vehicles.