DIESELR EFI Live Tune Files (2004.5-2005 Duramax LLY 6.6L)

Fitment

2004.5-2005 6.6L Duramax

Note

Tune files are built to order and are typically completed within 24-48 hours, however depending on the current order volume of the tuners please allow up to 1-3 business days to ensure your files are completed by when you need them! Highly modified vehicles have longer wait times due to their complexity, wait times on these applications can be 1-5 business days.

A VIN License is required to load tuning into the vehicle if you have not already purchased one, it can be purchased below.