HP Tuners GM E42 Service (L5P Unlock)

L5P Global B ECM Unlock Service. Tune 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 or MPVI4 device and VCM Suite.

ECM needs to be shipped to be unlocked. Vehicle won't be usable during that time.

Shipping to HP Tuners is your responsibility. The shipping charge is for return shipping. We will provide details.