The Heavy Duty Code Reader, No. ET3600HD, from Mac Tools supports 10 OBD-II modes and CAN protocols as well as heavy duty OBD.EOBD J1708, J1939, and J1979. It's able to read and erase DTCs of light, medium, and heavy duty vehicles (Class 4 through 8). Additionally, the ET3600HD has a 3.5" screen and offers free lifetime updates and a multilingual menu (English, Spanish, French).