2024 - 2026 L5P Duramax 2500 3500 | Pickup only | HP Tuners

The E42 ECM has Global B security and requires to be sent into HP Tuners to be unlocked* Due to the complex nature of these tunes. a stock file must be sent to us after unlocked. Allow 5-7 business days to get a file in return. You may put the ecm back into the truck and drive around like normal until modified tune file is received Requires MPVI3 or RTD4 to flash 2024–2026 Chevy Silverado / GMC Sierra 2500 3500 (L5P) Introducing the HP Tuners for 2024-2026 L5P Duramax 2500 3500 | Pickup! Get ready to take your truck's performance and reliability to the next level with this cutting-edge tuning solution designed specifically for the L5P Duramax engine. With HP Tuners, you can unlock the true potential of your truck by optimizing its performance and achieving remarkable results. Experience an increase in mileage, horsepower, and torque, giving you the power and efficiency you need for any task. Say goodbye to stock power limitations and hello to enhanced performance. With HP Tuners, you