HP Tuners exclusively presents our L5P Modified ECM Purchase, giving you the power to tune your 2017 Chevrolet Silverado / GMC Sierra 2500/3500 6.6L Duramax. You now also have the ability to keep your factory ECM unmodified and purchase a fully unlocked PCM for flashing.
L5P Modified ECM Purchase:
This option allows you to purchase an already Modified ECM from us, and you keep your original ECM. Remember, do NOT send us your ECM.
