GM Duramax L5P – ECM E41 Upgrade & Unlock Kit (2017-2023)
E41 L5P Upgrade & Unlock Kit
L5P ECM unlock kit allows you to conveniently upgrade your E41 ECM for 2017-2023 Chevy Silverado and GMC Sierra 2500/3500 6.6L Duramax trucks without the need to remove it from the vehicle.
This upgrade can be completed in 20 minutes or less and enables essential functions like reading, writing, and tuning via a specialized computer software using an OBD2 Flash Delete Tuning Interface. This kit is currently available for purchase in the US and Canada only.
This streamlined process makes it easier for professionals and DIY enthusiasts to enhance their trucks' performance without the hassle of removing the ECM.
Upgrade Your E41 ECM Right in the Garage/Shop
The new E41 ECM Upgrade Kit provides DIY enthusiasts and tuners an easy way to upgrade the ECM on 2017-2023 Chevy Silverado/GMC Sierra 6.6L L5P Duramax trucks. You don’t need to remove the ECM, which eliminates the risk of damaging tabs during installation.
Additionally, no complicated reprogramming or relearns are required:
- No IMMO relearn
- No crank relearn
- No “Replace ECM” function
The upgrade process takes just 20 minutes with the kit, OBD2 Flash Delete Tuning Interface, and specialized software. Once complete, you’ll have access to full diagnostics, scanning, data logging, and editing capabilities. Write times are incredibly fast — only 6 minutes!
This streamlined upgrade ensures both speed and convenience for a hassle-free experience.
Find E4 upgrade kit procedure and cable installation instructions here
Note:
- Off-Road Use Only: Product is intended for off-road use only. They may not be legal for use on public roads where emissions or safety laws apply.
- Check Local Laws: Before buying or installing any parts, check your local laws to ensure the modifications are legal.
- Professional Installation Recommended: We strongly recommend professional installation. These parts are designed for users with advanced mechanical knowledge. Installation instructions are not included unless stated on the product page. Some adjustments or modifications may be required. We do not offer returns or refunds for installations that can’t be completed.
- Warranty Notice: Installing these parts may void your vehicle’s warranty. Please check with your manufacturer.
- No Liability: JS Speedshop is not responsible for any damage or issues caused by the use of these parts.
- Product Images: Images shown are for reference only. Actual products may differ in color, branding, or design.
- No Performance Guarantees: These parts are intended to improve performance, but results may vary and are not guaranteed.
- Please Review: Make sure to read our Terms & Conditions, Shipping Policy, and any known issues before purchase.
Hurry Up! Only 61 items left in stock!
Copy link:
Share:
Ask a question
Shipping
We strive to provide fast and reliable shipping options for all our customers. For detailed information about our shipping rates, delivery times, and policies, please visit our Shipping Page.
Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
