“Does this eld come with the adapter for a Mack truck with the rectangle obd 13 port?”

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• The Garmin eLog only supports 9-pin J1939 and 6-pin J1708 diagnostic ports to fit nearly any semi-truck. Garmin eLog is not compatible with vehicles using the OBD2 protocol (SAE J1979).

  Answered by GarminProductExpert 7 years ago

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