| Make/Type | Year | Engine | Diagnostic Port |
| Freightliner | 2005 & older | All | 6-pin |
| 2006–2015 | All | 9-pin | |
| 2015 & newer* | All | 9-pin Type II (green) | |
| Kenworth | 2005 & older | All | 6-pin |
| 2005–2015 | All | 9-pin | |
| 2015 & newer* | All | 9-pin Type II (green) | |
| Peterbilt | 2005 & older | All | 6-pin |
| 2006–2015 | All | 9-pin | |
| 2015 & newer** | All | 9-pin Type II (green) | |
| International | 2006 & older | Cummins | 6-pin |
| 2006–2015 | Cummins | 9-pin | |
| 2005 & older | CAT | 6-pin | |
| 2005–2014 | CAT | 9-pin | |
| 2015 & newer* | All | 9-pin Type II (green) | |
| Volvo | 2000 & older | Volvo | 6-pin |
| 2001–2014 | Volvo | 9-pin | |
| 2014 & newer | Volvo | OBDII Plug (16-pin) | |
| 2006–2016 | Cummins | 9-pin | |
| 2016 & newer* | Cummins | 9-pin Type II (green) | |
| Mack | 2000 & older | Volvo | 6-pin |
| 2001–2014 | Volvo | 9-pin | |
| 2014 & newer | Volvo | OBDII Plug (16-pin) | |
| Western Star | 2006–2016 | Cummins | 9-pin |
| 2016 & newer* | Cummins | 9-pin Type II (green) | |
| 2010–2015 | All | 9-pin | |
| 2015 & newer* | All | 9-pin | |
| Light/Medium Duty Vehicle | 2008 & newer | All Diesel and Gas | OBDII Plug (16-pin) |
