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Due to an influx of orders, ECM repairs are delayed. We apologize for the inconvenience and working diligently to get orders out in a timely manner - Mak’s Team
ATTENTION CUSTOMERS: You MUST know your correct part number BEFORE placing your order!

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REPAIR SERVICE – 1999 – 2000 GMC Sierra C/K 3500 ECM/PCM/ECU Repair Service

This service addresses ALL ECU ISSUES and the following components:

• Trouble Codes (DTC)
• Ignition
• Injectors
• Intermittent Problems
• Integrated Circuits / Drivers
• Thorough Cleaning

Important information:

  • This ECM can only be opened 2-3 times before the cover inevitably breaks.
  • We may need a VIN if a PCM has no communication
  • A scanner may be required after installing the PCM to clear all DTC’s
  • In the event of a burnt circuit board, water damage or non replaceable components, we may not be able to repair your ECM

If your unit passes our rigorous testing process, you will receive a refund minus the testing service fee of $120.

After completing your purchase, you will be directed to fill out a Repair Request Form (required).


SKU ECM-REPAIR-19992000GMCSIERRAC/K3500 Category Tags , , , , , , , , , , ,



Final total


Providing a more detailed information about the issues you're having expedites our repair process, ensuring swift resolution for your needs.

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  • Enter Your 17-digit VIN

    VIN is required for programming, if you do not provide your VIN, the part cannot be programmed and may not be suitable for your vehicle.

  • *Brief Description Of Your Issues

Convert your purchase to a rental within 30 days if the part is not the real problem. Check our Warranty Information & Returns Policy for details.

All repairs include inspecting internal PC Board(s) for defective components and/or traces. Corrosion if present will be mitigated and traces will be repaired. The ECM / PCM case will be cleaned. We replace components only with the latest revision from the Original Equipment Manufacturer (OEM). Learn more about our Rebuild Process.