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Ships within 48 hours · Estimated delivery Sep 21 - Sep 26
the GM E41 ECM Upgrade Kit is still be required
and Performance Applications
send-in upgrade service is required to enable diagnostics and tuning capabilities through VCM Suite
If you do not already own one of these flash tools then you will want to purchase the MPVI4 or use a friends
The 2020-2026 L5P Duramax is known for its smooth shifts and great performance while towing
HPTuners GM E42 ECM Service (2024-2026 L5P, Global B) Tune Files the GM E41 ECM UpgradeTune 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
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