GM Group Gen2 Delco E-Series (E41/E46/E88/E90/E93) Support in Flex: OBD Programming with Bench Unlock

Late-model GM platforms can be tricky: locked ECUs, long read times, and zero room for mistakes when you’re working on a customer vehicle. That’s why the latest Flex coverage for GM Gen 2 Delco E-series (Exx) is a big deal for shops that want a stable, repeatable workflow.

Flex software update v7.37.0.0 adds support for Delco E41, E46, E88, E90, and E93 (Global A) ECUs, using OBD programming with Bench Unlock to improve stability and safety during communication with the control unit.

What’s included in this GM Gen2 Delco update

This release expands Flex compatibility to a newer generation of Delco ECUs and helps simplify the read/write process.

Once connected, Flex identifies the memory areas available on the ECU and then enables the appropriate read functions—so you’re not guessing what to pull.

Choose the right read: Maps vs. Maps & Code

Flex gives you two primary read paths depending on what you need for the job:

• Read Maps: focuses on the calibration area
• Read Maps & Code: pulls both the calibration area and the Application SW area

That makes it easier to match the workflow to the task—whether you’re doing a straightforward calibration change or need the broader dataset.

Virtual Read: reduce waiting when files are available

For supported ECUs, Flex can also use a virtual read that can be downloaded from online servers (when available). In practice, this can cut down on time spent waiting and help you keep work moving through the shop.

Unlock + write supported (included in subscription)

With this protocol, Flex supports unlocking and writing operations without additional add-on costs—everything is included in the subscription.

Supported vehicles (examples)

Here are a few examples of vehicles listed under this new protocol:

• Chevrolet Silverado 2500HD (GMT1HC)6L Duramax V8 451PS
• GMC Sierra 1500 (GMT1xx)0L Duramax I6 281PS
• Opel Astra (K)4L Turbo 150PS
• Chevrolet Silverado 1500 (GMT1xx)3L Ecotec3 V8 360PS
• GMC Sierra 3500HD (GMT1HG)6L V8 407PS

To confirm coverage for a specific vehicle, reference the full list here: https://www.magicmotorsport.com/en/flex-vehicle-list/

Flex software packages that include this protocol

This protocol is available within these Flex software bundles:

• 1M – SWFlex ECU (car/van/bike) OBD/Bench Master
• 1S – SWFlex ECU (car/van/bike) OBD/Bench Slave
• 5M – SWFlex Full Master
• 5S – SWFlex Full Slave

Newly added OBD protocols (GM Delco Gen2)

Flex adds OBD support for the following ECUs and functions:

• Delco E41 (MPC5676): Virtual Read, Read/Write with checksum (Maps), Read/Write with checksum (Maps & Code)
• Delco E46 (MPC5777): Virtual Read, Read/Write with checksum (Maps), Read/Write with checksum (Maps & Code)
• Delco E88 (MPC5777): Virtual Read, Read/Write with checksum (Maps), Read/Write with checksum (Maps & Code)
• Delco E90 (MPC5777): Virtual Read, Read/Write with checksum (Maps), Read/Write with checksum (Maps & Code)
• Delco E93 (MPC5777): Virtual Read, Read/Write with checksum (Maps), Read/Write with checksum (Maps & Code)

Typical read/write times

Published times for this protocol are:

Writing

• Maps: ~ 1 min 40 sec
• Maps & Code: ~ 5 min

Reading

• Maps: ~ 40 min
• Maps & Code: ~ 3 hours

Image: GM Gen2 Delco Exx vehicles (from Magicmotorsport)

GM Gen2 Delco Exx vehicles

Final note

Vehicle names and trademarks mentioned are the property of their respective owners and are referenced only to describe compatibility.

If you’d like help selecting the right Flex package for your shop (Master vs. Slave, ECU-only vs. Full), contact us at USA@Viezu.com or text/call 801-905-1355.