HP Tuners GM E42 ECM Upgrade Service (2024-2025 GM Duramax L5P) - Global B

Get your 2023+ Chevrolet Silverado and GMC Sierra 2500/3500 6.6L Duramax ready for tuning with GM E42 ECM Upgrade Service!

The HP Tuners GM E42 ECM Upgrade Service (2024-2025 GM Duramax L5P) is your first required step. This mail-in ECM unlock service prepares your factory E42 ECM for custom tuning using HP Tuners' VCM Suite (Beta) and MPVI3 device.

Once you place your order, you’ll receive detailed shipping instructions to send your original ECM to HP Tuners. After the upgrade is complete, it’s shipped back to you—fully unlocked and ready for licensing and tuning.

What’s Included:

• GM ECM unlock for E42 ECM (2024–2025 6.6L GM Duramax)
• Return shipping from HP Tuners to you (added at checkout)

Requirements:

• MPVI3 dievice required (MPVI2 and 2+ are not compatible)
• 8 Universal Credits needed to license ECM
• Original ECM must be in good condition (no broken tabs/plastic).
  Note: Spare ECMs will NOT BE ACCEPTED, no exceptions. Only the original ECM from your vehicle is acceptable for this service.
• HP Tuners' VCM Suite (Beta)

Supported Trucks:

• 2024–2025 Chevrolet Silverado HD 2500/3500 (6.6L L5P)
• 2024–2025 GMC Sierra HD 2500/3500 (6.6L L5P)

*Please note: Processing time is 3-5 business days for upgrade service. 

**Original ECM must not have any broken tabs, broken plastic, & must be in good working order or it will be returned.** 

Be aware that this option necessitates sending your ECM to HP Tuners for the upgrade.

Why DieselR?

At Dieselr, we already have three 2024+ L5Ps in our test and development fleet. This means we’re not just selling the HP Tuners GM E42 ECM Upgrade Service (2024-2025 GM Duramax L5P)—we’re developing next-level 2024–2025 Duramax tuning for it. Get your GM E42 ECM Upgrade Service now so you’re ready when our tune files drop.