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and Performance Applications
Optimize your aftermarket performance parts
the GM E41 ECM Upgrade Kit is still be required
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HPTuners GM E42 ECM Service (2024-2026 L5P, Global B) Tune Files and Performance ApplicationsTune your 2024 2025 Silverado Sierra 2500 3500 with the 6. 6L L5P Duramax (E42 ECM) now using HP Tuners VCM Suite! This service is required to upgrade the E42 ECM in these diesel trucks for tuning using an MPVI3 device and VCM Suite. Note: Spare ECMs will NOT BE ACCEPTED, no exceptions. Only the original ECM from your vehicle is acceptable for this service. Have a 2017 2023 model L5P? Check out the GM E41 ECM Service (L5P) instead. Shipping address
