Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
HP Tuners GM E46 ECM upgrade is a send‑in service to update the vehicle's ECM software. This service replaces or upgrades the GM E46 ECM functionality per HP Tuners' procedures and requires sending the original ECM for modification. It is offered as a reman/upgrade service rather than a standalone plug‑and‑play module.
HPT GM E46 Non-Global B ECM Upgrade (*Original ECM Required*)
