How do I unlock my tuner?

SCT and Diablosport devices VIN lock (marries) to a single vehicle. You cannot use the device to tune a new or different vehicle until you have returned the original vehicle back to stock, which will unlock the device. You can only change vehicles 5 times before the unit is permanently locked. To reset the changes or unlock the device, you will need to contact the manufacturer directly. Service charges do apply.

SCT/BullyDog Devices

https://derivesystems.helpjuice.com/147040-remote-unlock-info/click-here-for-steps-to-unlock-your-device?from_search=63033762

Diablosport

https://www.diablosport.com/unlockreset/