GM Duramax LM2 – ECM E46 Upgrade & Unlock Service (2020-2022)
Type: Tuners | Fits: GM Duramax
Unlock and upgrade your E46 ECM with our streamlined Send-In ECM Upgrade & Unlock Service, designed exclusively for 2020–2022 Chevy Silverado and GMC Sierra 1500 3.0L Duramax LM2 models. Please note: this service is not compatible with E66 ECMs found in late 2022 and newer models.
This process is simple, efficient, and minimizes downtime—making it the ideal choice for both enthusiasts and professional tuners.
Vehicle Compatibility
-
2020–2022 Chevy Silverado 1500 3.0L Duramax (LM2)
-
2020–2022 GMC Sierra 1500 3.0L Duramax (LM2)
- Not compatible with E66 ECM (late 2022+)
Service Highlights
- Hassle-Free Upgrade: Ship your ECM to our facility. We’ll unlock and upgrade it, then send it back ready for installation.
- Quick Turnaround: Minimal downtime ensures you get back on the road faster.
- No Physical Modifications: Avoid risks like broken tabs or damage from ECM removal or replacement procedures.
- Advanced Diagnostics & Tuning: After upgrade, your ECM supports full read/write access, data logging, and special functions with an OBD2 Flash Delete Tuning Interface.
- Industry-Leading Write Times: Faster flashing means less waiting and more driving.
Why Choose This Service?
- No IMMO relearn required
- No crank relearn necessary
- No “Replace ECM” function needed
- Supports advanced tuning and diagnostics directly after upgrade
How It Works
- Ship your ECM to us using the provided shipping guidelines.
- Our team unlocks and upgrades it with specialized equipment and software.
- We ship the ECM back, ready for easy reinstallation.
Important Notes:
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TARIFF NOTICE:
While we ship with all required USMCA/CUSMA paperwork, U.S. Customs or carriers may still apply duties or fees at delivery. For details, see U.S. Customs & Border Protection
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.
Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
