2024-2025 Duramax GM E42 ECM Service

Fits

This service is only for 2024-2025 L5P Duramax trucks with the E42 ECM.

To start tuning your 2024-2025 L5P Duramax, you need this service. This is a one-time, send-in service that upgrades your original E42 ECM for custom tuning with HP Tuners’ VCM Suite. It’s the required first step to safely unlock your truck's true potential.

This is a send-in service. You must send your ORIGINAL ECM from your vehicle; spare ECMs will not be accepted. ECMs with broken locking tabs or connectors will also be rejected.

Part Number: ECM-E42-L5P-U

• A one-time, send-in service is required to upgrade your E42 ECM.
• Unlocks custom tuning and diagnostics for your 2024-2025 L5P Duramax using HP Tuners VCM Suite.
• Allows tuning via the OBDII port with an MPVI3 device and VCM Suite.
• Upgraded ECM maintains functionality with VCM Scanner and other diagnostic tools.
• VCM Suite can be used to return your truck to stock calibration.

Process & Timing: After purchase, you will receive an email with a shipping form and address. Remove your ECM and ship it to HP Tuners. 

Shipping Details:

For American Customers: You are responsible for the cost of shipping the ECM to HP Tuners. The shipping charge at checkout only covers the return shipping after the service is complete. The shipping address is: HP Tuners [ATT: GM E42 ECM Service (L5P, Global B)], 700 Eastwood Ln, Buffalo Grove, IL 60089.

For Canadian Customers: We will cover shipping and provide a label for you to directly send it to HP Tuners. 

Disclaimer: These services are completed at the owner’s risk. HP Tuners is not responsible for the vehicle, its powertrain, or how the control module is used or calibrated.