Description

This product has been discontinued.

Fits

Year	Make	Engine
2017+	GMC	L5P 6.6L Duramax

To apply custom tuning to your 6.6L L5P, you first need to unlock the ECM. This in - house service requires you to send us your ECM. Once unlocked, you can use an MPVI3 for custom tuning. You'll need to remove the ECM from your truck and ship it to us. Your truck won't be usable during this time, but we'll ship it back via the fastest route.

How to Remove Your ECM

1. Clear all codes, even if there are none, to ensure the tunes work.
2. After clearing codes, remove the key and disconnect the battery.
3. Take out the ECM.
4. Ship the ECM to us with tracking.
5. We'll write your tunes and send it back with any extra hardware you ordered within a day of receiving the ECM.

USA Customers: Send the ECM as a REPAIR to avoid border fees.

This is a discontinued service for unlocking the ECM of 2017+ GMC trucks with the L5P 6.6L Duramax engine. To use this service, first, clear all the codes in your truck. Then, remove the key and disconnect the battery. Next, take out the ECM and ship it to us with tracking. While your ECM is with us, your truck won't be useable. But don't worry, we'll send it back as fast as we can. Once we receive the ECM, we'll write your tunes and send it back with any additional hardware you ordered within a day. If you're a USA customer, make sure to send the ECM as a repair to avoid extra fees at the border. There's no special maintenance needed on your end, just follow these steps carefully for a smooth process.