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HP Tuners

GM E99 ECM Service (Global B) - Upgrade Only

GM E99 ECM Service (Global B) - Upgrade Only

ECM-GB-E99-U

$1,499.99 USD
$1,499.99 USD
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Shipping calculated at checkout.

HP Tuners is thrilled to offer support for the GM Global B E99 ECM found in various 2020+ GM vehicles (listed below). This one-time, send-in upgrade service is required to enable diagnostics and tuning capabilities in VCM Suite (BETA).

Shipping address for send-in E99 ECM service (Global B): HP Tuners (ATT: GM E99 ECM Service [Global B]), 700 Eastwood Ln, Buffalo Grove, IL 60089

This is a send-in service which means you must first send us your original ECM. Please read this page in its entirety before purchasing.

Get Your GM E99 ECM-Equipped Vehicle Ready for Tuning

HP Tuners is thrilled to offer full custom diagnostics and tuning support in VCM Suite (BETA) for GM’s Global B E99 ECM.

This controller can be found in the following supported vehicles:

  • 2020-2023 Chevrolet Corvette 6.2L (LT2) (non-Z06)
  • 2024 Chevrolet Corvette C8 6.2L (LT2) (non-Z06)
  • 2022-2024 Cadillac CT5-V Blackwing 6.2L (LT4)
  • 2020-2023 Cadillac CT5-V 3.0L TT (LGY)
  • 2022-2023 Cadillac CT4-V Blackwing 3.6L TT (LF4)
  • 2023 Cadillac Escalade-V 6.2L

Don’t see your vehicle? Check out our services for GM’s non-Global B E99 ECM here.

Note: HP Tuners also supports the GM Global B T93 TCM found in select supported vehicles with the E99 ECM and 10-speed automatic transmission. See our GM T93 TCM Service (Global B) here.

The Details

This one-time service upgrades your original E99 ECM (Global B generation only) and is required for tuning using HP Tuners’ software. Users must physically remove their original E99 ECM from their vehicle and ship it to HP Tuners’ headquarters for servicing. Once upgraded, users have full access to calibrate, log, and scan via the OBDII port.

Note: No need for an IMMO Relearn, Crank Relearn, or to perform the “Replace ECM” Function in VCM Scanner on the stock ECM.

Everything you need to tune your E99 ECM vehicle with HP Tuners:

  1. This one-time, send-in GM E99 ECM Service (Global B) (upgrade service).
  2. Download the latest version of VCM Suite BETA for free here.
  3. Once upgraded, purchase (8) Universal Credits to license your E99 ECM/vehicle.
  4. GM Global B vehicle support is only compatible with our MPVI3 interface.

Note: Universal Credits for licensing are not included in the cost of any upgrade service or purchase. Credits must be purchased separately.


  • Your upgraded E99 ECM can only be tuned via the OBDII port with an MPVI3 interface and the latest version of VCM Suite (BETA) (MPVI2+ and older generation devices are not compatible with any GM Global B vehicle support).
  • While the stock ECM is being serviced at HP Tuners, a spare ECMcannot be temporarily installed and relearned in the vehicle otherwise the stock (now upgraded) ECM that was sent in for service will no longer function in vehicle.
  • Once the upgrade is complete, users must license their ECM for (8) Universal Credits (sold separately).
  • Upon reinstallation of your upgraded control module, we recommend that you first connect to the lastest version of VCM Scanner and read/clear DTCs.
  • No other tuning or calibration tools can be used with the ECM.
  • 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 stock calibration and/or update to the latest stock calibration.
  • There is no need for an IMMO relearn, crank relearn, or the “Replace ECM” function as long as the ECM returns to the same vehicle it came from.
  • Please allow 1-3 business days for this upgrade service, not including shipping times.
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