This is an engine computer (ECU/ECM) cloning service for select GM Buick and Chevrolet vehicles equipped with E39 / E39A-style engine control modules. We transfer all original data from your faulty ECU to a customer-supplied replacement unit, ensuring seamless operation with no additional programming required.

All vehicle-specific information—VIN, immobilizer/security data, and calibration data—is cloned so the replacement ECU is plug-and-play with your existing vehicle systems.

Customers must supply both the original ECU and a replacement ECU with matching part numbers and hardware numbers.

Supported Vehicles

• GM Buick vehicles equipped with E39 / E39A ECM

• GM Chevrolet vehicles equipped with E39 / E39A ECM

Service Details

• Complete cloning of original ECU data to replacement ECU

• Transfers:

  • VIN

  • Immobilizer / security data

  • Calibration and configuration data

• Replacement ECU will be plug-and-play

• No dealer programming required

• Next business day turnaround once received

Customer Requirements

• You must send both:

  • Your original ECU

  • A replacement ECU

• The replacement ECU must:

  • Have the same part number

  • Have the same hardware number

• The original ECU must have OBD communication for this service to be successful

Important Notes

• This service requires a communicating original ECU via OBD

• ECUs with no communication or severe internal damage may not be eligible

• Part and hardware numbers must match exactly

• This is a cloning service only — no tuning or software modification is performed

How It Works

1. Verify your ECU part number and hardware number

2. Purchase this service

3. Ship both the original and replacement ECUs to us

4. We clone the data and program the replacement ECU

5. The ECU is shipped back next business day, ready to install

Why Choose Us?

• Experienced GM ECU cloning specialists

• Accurate VIN and immobilizer data transfer

• Fast turnaround time

• Trusted by professional repair shops and vehicle owners

Frequently Asked Questions (FAQ)

Do I need dealer programming after installation?
No. Once cloned, the ECU is fully plug-and-play.

Can I use a used or junkyard ECU?
Yes, as long as the part number and hardware number match exactly.

What if my ECU does not communicate via OBD?
This service requires OBD communication. Contact us before ordering if your ECU does not communicate.

Will this fix performance or tuning issues?
No. This service strictly transfers original data and does not alter tuning or performance.

How fast is the turnaround time?
Your ECU is cloned and shipped back next business day after receipt.

Contact Us

Not sure if your vehicle uses an E39 / E39A ECM or need help confirming compatibility?
Send us a message with your vehicle details and ECU part number, and we’ll be happy to assist.