Fits: 2017+ GM L5P w/ 6.6L Duramax
Before you can apply custom tuning onto your 6.6L L5P, the ECM needs to be unlocked. This is an in-house procedure and you are required to send us your ECM. Once the ECM is unlocked, you can then apply the custom tuning with an MPVI3.
We need the ECM present at our shop to perform the Unlock. This means you will need to remove the ECM from your truck and ship it to us for unlocking, your truck will not be useable during this time. We will ship the fastest route possible to ensure you receive the ECM as soon as possible.
How to Remove Your ECM
- Clear all your codes, even if you have none, this is a necessary step to ensure the tunes take.
- Once you clear your codes, remove the key, and disconnect the battery.
- Remove the ECM
- Ship the ECM to us with Tracking
- Within a day of receiving the ECM, we can write your tunes and send it back with any additional hardware that you ordered.
USA Customers: Ensure you are sending the ECM as a REPAIR to avoid extra fees at the border.
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