Part Number

You must match match your part number and your serial number: 12661603 and 12658036

We can program the VIN into your ECM. You will need to complete a 30 minute key relearn and we'll send those instructions with your order. We do also recommend talking to your mechanic about getting the latest software updates from GM once the ECM is installed in your vehicle.

Tech Notes

ECM has been tested with by our experience techs. Some of these are listed below:
• ECM tested and does have communication and a properly functioning processor!
• ECM injectors circuits test good
• ECM throttle control circuits test good...and more!

Fitment/Interchange

• You must match your part number exactly as seen above. If any numbers are off compared to your original it will not work properly.
• At the time of purchase please supply your VIN for programming. You will need to complete a 30 minute key relearn and we'll send those instructions with your order. We do recommend talking to your mechanic about getting the latest software updates from GM once the ECM is installed in your vehicle.
• ECM will fit 2014 to 2015 GM Chevy 6.6L diesel models with an exact part number match.

Item Condition

• Pins perfect, none are broken or bent
• Connectors may some small chips in the plastic but all of the lock tabs are in place

Warranty

This ECM comes with a 90 day warranty from the date of purchase. Please keep a copy of your purchase record which we will send with your item.