This site will be unavailable from 7:00PM to 8:00PM CST, Tuesday December 1st, for maintenance. We apologize for any inconvenience.
Welcome to the DiagnosticLink Ordering Site
DiagnosticLink™ is a computer-based diagnostic software for Detroit™ powertrain and Freightliner™ vehicle systems. It can display ECU information, diagnostic fault codes, instrumentation and run service routines*.

*Certain features are available for authorized users only