GM E68 ECM Service (Global B) - Upgrade Only

Tune your flat-plane or twin-turbo C8. The Corvette Z06, ZR1 and ZR1X use the Global B E68 engine computer, which has to be upgraded before it can be tuned. This one-time HP Tuners send-in service upgrades your original ECM so you can calibrate, data log and scan through the OBDII port with VCM Suite.

This is a send-in service. Your ECM has to come out of the car and ship to HP Tuners, so the car will be down while it's away. Please read this whole page before ordering.

Will it work on my car?

• 2023-2026 Chevrolet Corvette Z06, 5.5L LT6
• 2025-2026 Chevrolet Corvette ZR1, 5.5L twin-turbo LT7
• 2026 Chevrolet Corvette ZR1X

For the Tremec dual-clutch transmission in these cars, see the GM T46 TCM Service (Global B). The C8 Stingray and E-Ray use a different ECM; the C7 ZR1 uses our GM E99 ECM Services for ZR1.

What else you'll need (sold separately)

• 10 Universal Credits to license the E68 ECM.
• An HP Tuners MPVI4. The E68 does not work with the MPVI2, MPVI2+ or MPVI3.
• The latest VCM Suite BETA software (free from HP Tuners).

How it works

1. Confirm your car is covered and place your order. Have your VIN handy; HP Tuners requires it.
2. Our team emails you the order number and the HP Tuners shipping form.
3. Remove the ECM, pack it carefully with the completed form inside, and write the order number on the outside of the box.
4. Ship it to HP Tuners with any carrier. Shipping to HP Tuners is the customer's responsibility; the shipping charged at checkout covers the return trip.
5. HP Tuners upgrades the ECM and ships it back.
6. Reinstall it, license it with 10 Universal Credits and start tuning.

Ship to:
HP Tuners, LLC
ATT: GM E68 ECM Service (Global B)
[Your order number]
711 Dartmouth Lane
Buffalo Grove, IL 60089

Wait for our email before you ship. Please don't send your ECM until you have the order number and shipping form.

Before you ship: important

• Send the original ECM from your car, not a spare.
• Do not install and relearn a spare ECM while yours is away. If you do, your upgraded original will no longer work in the car.
• No immobilizer relearn, crank relearn or "Replace ECM" procedure is needed as long as the ECM goes back into the same car. A dealer resync may still be required; that is the owner's responsibility.
• After reinstalling, connect with VCM Scanner and read and clear codes first.
• Once upgraded, the ECM can only be tuned through the OBDII port with HP Tuners software. Scan tools and dealer diagnostics keep working, and you can return to stock any time with VCM Suite.
• This service is performed at the owner's risk. Normal wear and weathering from the ECM's location in the car is expected.