2017+ Chevrolet Silverado / GMC Sierra 2500 & 3500 6.6L Duramax L5P E41 ECM – Upgrade or Purchase
Unlock the full tuning potential of your 2017+ L5P Duramax with HP Tuners’ E41 ECM Service. Choose the option that fits your needs:
Option 1 – New ECM Purchase
Get a brand-new, pre-upgraded E41 ECM with no downtime.
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Already unlocked for HP Tuners VCM Suite (BETA)
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No need to send in your original ECM
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Eliminates IMMO relearn, crank relearn, and “Replace ECM” functions when installed in the original truck
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Perfect for getting tuned immediately
Option 2 – ECM Upgrade Service
Send in your current E41 ECM for an upgrade.
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Remove your ECM and ship it to HP Tuners
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Returned fully unlocked and ready for tuning
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Must be in good working condition with no broken tabs or damaged housing
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1–3 business day turnaround (excluding shipping)
What’s Required for Tuning:
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Latest HP Tuners VCM Suite BETA (free download)
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6 Universal Credits to license your ECM
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MPVI3, MPVI2+, or MPVI2 interface (sold separately)
Vehicle Compatibility:
2017+ Chevrolet Silverado & GMC Sierra 2500/3500 6.6L Duramax L5P -