Description 

Fits 

Year	Make	Model
2020-2022.5	GM	Sierra/Silverado 1500 LM2 w/3.0L Duramax

 

Unlock your 2020–2022.5 LM2 Duramax with a single custom tune file from Peakside Performance. Built specifically for your truck and setup, this tune maximizes power, torque, and fuel efficiency. Designed for flashing with the HP Tuners MPVI, it provides a straightforward, performance-focused upgrade.

Please note: These files are meant for unlocked ECMs only. If you still need to unlock your ECM, please use these links. 

E46: Unlock ECM 6 Credits Required to Flash 

E66: Unlock ECM 6 Credits Required to Flash 

These are tune files only. You need an HP Tuners MPVI device and credits to flash these tunes. Click here for the device, and here for the credits. 

Part Number: PSP-20-22-5-LM2-HP-SNG 

Features

• Single custom tune file for LM2 Duramax
• Optimized for power, torque, and fuel efficiency
• Requires HP Tuners MPVI device and credits
  • Compatible with MPVI2, MPVI3, & MPVI4 Devices
• Tailored specifically to your truck and build
• These files are meant for unlocked ECM's only