HPtuners - GM E46 ECM Service

HPtuners - GM E46 ECM Service

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HPtuners is thrilled to now offer industry-exclusive custom tuning support for the E46 ECM found in 2020-2022 Chevrolet Silverado 1500/GMC Sierra 1500 3.0L Duramax (LM2) trucks (non-Global B vehicles). The E46 ECM must be upgraded in order to use VCM Editor for tuning.

Own a 2020+ GM vehicle and need the T93 TCM unlocked, too? See our T93 TCM Services!

Shipping address for send-in E46 ECM services: HP Tuners (ATT: E46 ECM Service), 700 Eastwood Ln, Buffalo Grove, IL 60089


Tune your 2020-2022 3.0L Duramax Truck with HP Tuners

HP Tuners is thrilled to offer exclusive custom tuning capabilities for the GM E46 ECM. This ECM is found in 2020-2022 Chevrolet Silverado 1500/GMC Sierra 1500 3.0L Duramax (LM2) diesel trucks (non-Global B) and requires this service in order to tune the ECM using VCM Editor.

This one-time upgrade service upgrades your original E46 ECM. This requires you to remove the original ECM from your truck and send it to our headquarters for servicing. After upgrading, we’ll ship it back to you and you’ll have full access to calibrate and write/flash via the OBDII port using VCM Editor.

No reprogramming or relearns required:

  • No IMMO relearn*
  • No crank relearn*
  • No “Replace ECM” function*

*As long as the ECM is installed back into the same vehicle it came from.

E46 ECM Upgrade:

  • ECM Upgrade Service: $399.99
  • ECM (E46) License for tuning: (6) Universal Credits (sold separately)
  • Requires MPVI2, MPVI2+, or MPVI3 interface and the latest version of VCM Suite BETA

Note: HP Tuners also supports the T93 TCM found in 2020+ GM vehicles. If you own a vehicle with the T93 TCM, see our GM T93 TCM Services.


  • HP Tuners supports 2020-2022 Chevrolet Silverado 1500/GMC Sierra 1500 3.0L Duramax (LM2) trucks that are non-Global B. This includes “facelift” trucks as they are Global-B and contain a different controller.
  • ECMs with broken tabs or connectors WILL NOT be accepted for Upgrades.
  • This service only upgrades your original ECM for tuning, it does not reprogram your ECM for a different VIN. If you intend to send HP Tuners a spare E46 ECM, it will be returned to you with the same programming as it was received and may not operate in your GM vehicle without additional programming by a GM dealer.
  • Your E46 ECM core must be fully functional with no physical or internal damage.
  • No other tuning or calibration tools can be used with the E46 ECM (not including dealer reflash tools).
  • VCM Scanner, Dealer Diagnostic, and other diagnostic tools will continue to function normally.
  • The latest version of VCM Suite can be used to return to the stock calibration and/or update to the latest stock calibration.
  • The E46 ECM upgrade service takes about 1 to 2 business days to complete (not including shipping times).
  • HP Tuners’ E46 ECM support does not cover the Chevrolet Suburban LM2 at this time.

Step 1: Once you’ve confirmed your vehicle’s support (2020-2022 Chevrolet Silverado 1500/GMC Sierra 1500 3.0L Duramax (LM2) with E46 ECM), purchase this service.

Step 2: After placing your order, see the “Shipping” tab for a shipping form and address. Fill out this form and place it in your shipping box. You will also receive an email immediately after placing your order with this shipping form and address.

Step 3: Remove the ECM from your vehicle and safely package it. Place your completed shipping form in the box.

Step 4: Write your order number on the outside of the shipping box.

Step 5: Ship your ECM to HP Tuners using any carrier you prefer. The shipping address can be found on this page and in the email discussed in step 2. Shipping costs are the responsibility of the customer.

Step 6: HP Tuners will upgrade your ECM for tuning and diagnostics. Then, we’ll ship it back to you.

Step 7: Once you receive your upgraded ECM, install it back into your vehicle. License the E46 ECM for (6) Universal Credits (sold separately) and start tuning with your MPVI2 or newer generation device and the latest version of VCM Suite BETA

Shipping address for ECM upgrade:

HP Tuners, LLC
ATT: E46 ECM Service

700 Eastwood Ln
Buffalo Grove, IL 60089

Allow for 1-3 business days of service time (not including shipping times).

After purchasing this service, please fill out the shipping form below and place it inside your shipping box. Please also write your order number on the outside of your shipping box where it is visible.


 NOTE: Customers are responsible for shipping costs when sending HP Tuners your ECM/PCM/TCM. The shipping charge at checkout only covers returning your control module after modification.