GM Duramax L5P – ECM E41 Upgrade & Unlock Kit (2017-2023)

For off-road use only

Image is for demonstration purposes only. Actual device may vary in color and branding

E41 L5P Upgrade & Unlock Kit

Conveniently upgrade the E41 ECM, found in 2017-2023 Chevy Silverado and GMC Sierra 2500/3500 6.6L Duramax trucks (L5P and L5D applications), without ever removing it from the vehicle. This ECM upgrade kit allows you to perform read, write, and special functions using specialized computer software through an OBDii Flash Delete Tuning Interface, completing the process in 20 minutes or less.

Availability

The GM E41 ECM Upgrade Kit is currently available in the US and Canada only.

Upgrade Your E41 ECM Right in Your Garage or Shop

This new E41 ECM Upgrade Kit provides DIYers and professional tuners the ability to upgrade the ECM on their 2017-2023 Chevy Silverado/GMC Sierra 6.6L L5P GM Duramax in their own garage or shop. The best part? There's no need to remove the ECM, eliminating any risks of damaging the tabs during the process.

No reprogramming or relearn procedures are required for this kit:

• No IMMO (immobilizer) relearn needed
• No crank relearn required
• No need to perform the “Replace ECM” function

From start to finish, you can complete the upgrade in approximately 20 minutes with just the upgrade kit, an OBDii Flash Delete Tuning Interface (with the included USB A to C cable), and specialized tuning software.

Quick and Efficient Tuning

Once upgraded, experience unparalleled diagnostics and tuning using specialized software with full scanning, data logging, read, edit, and write capabilities. You’ll also benefit from the industry’s fastest write times—approximately 6 minutes!

INSTRUCTIONS CAN BE FOUND HERE