Sample photo only.  Harness shown is a new build with available options.

Leave it to us

Doing it yourself sometimes doesn’t pan out. The typical LS, Gen 5 LT1 or Duramax harness has hundreds of individual wires and each has a specific place in the harness.  While setting it up for standalone yourself is possible with the right tools and information, you will also need to bring plenty of patience. Rely on our knowledge and experience instead to provide you with a harness that requires just 4 connections to make your LS, Gen V LT1 or Duramax Swap Engine run. Take a look at the LS Engine, Gen 5 LT and Duramax tabs for more details and examples of our work.

34 Ford with Gen 5 Direct Injected L83 and 6L80E Transmission

Modify any Duramax, Gen 5 LT, or Gen 4 LS Engine Wire Harness for use in your swap project.

A Lauraland, LLC Enterprise


  • Every harness is cleaned, degreased and power-ground circuits are load tested.

  • Current turn around time is 2 weeks. (Duramax and Gen 5 LT only)

  • Simple 4 wire hook up to make the engine run. (A Single Ground, 12V Constant, 12V Key On, Fuel Pump)

  • Fuse Block included.  Relays for ECM/TCM and Fuel Pump (LS LT only) are included.
  • 5' OBD diagnostic port is included on every harness.

  • Contact us for a quote or questions on our harnesses.