2001-2010 6.6 Duramax Efi Live tune pack

This is a tune pack only. You still need a VIN License All Digital Products (Custom Tuning, Tuning Revisions, Upgrades, and Credits) are Non-Refundable. Tune files are processed Monday-Friday and may take 24-48 hours to receive. Custom Tune files are not customized to your vehicles specifics. The files are pre-built by the vendors.