HPT L5P ECM Upgrade (*Original ECM Required*)

This is the HP Tuners ECM Upgrade service for your 2017-2022 Chevrolet Silverado 2500 HD or 3500 HD, and its GMC Sierra counterparts. If you're looking to tune your L5P Duramax diesel, this service is a crucial first step. It modifies your original Engine Control Module (ECM) to allow for custom tuning without requiring complex relearn procedures after installation.

The main benefit here is convenience. Normally, when you swap an ECM, you have to go through a crank relearn and an immobilizer (IMMO) relearn process, which often requires specialized tools or a trip to the dealership. HP Tuners modifies your existing ECM so that these steps are bypassed. This means you can install the tuned ECM and get back on the road much faster, with less hassle. It's a well-built solution designed to make the tuning process smoother for your truck.

This service requires you to send in your original ECM for modification. Once it's been updated by HP Tuners, it's ready to be installed back into your vehicle. Please note that this product is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's instructions for the complete installation process and any specific requirements.