Restore Peak Performance to Your GM Vehicle
Is your GMC Terrain, Chevrolet Equinox, or other compatible GM vehicle suffering from perplexing issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition? The Engine Control Module (ECM), often called the engine computer, is the brain of your vehicle’s powertrain. When it fails, it can cause a wide range of frustrating and performance-robbing symptoms. This genuine, used GM Engine Control Module, service number 12669908, is the reliable and cost-effective solution to get your vehicle back on the road and running as it should.
The Critical Role of Your 2018-2020 Terrain ECM
The ECM is responsible for managing a complex network of sensors and actuators that control everything from fuel injection and ignition timing to emissions systems and transmission shifting. It continuously processes data to ensure optimal engine performance, efficiency, and reliability. A faulty module can disrupt these critical calculations, leading to the symptoms you’re experiencing. Replacing a failed unit is not just about turning off a light on the dash; it’s about restoring the core functionality and safety of your vehicle. This particular module is the correct component for a wide range of vehicles, including the 2018-2020 Terrain ECM, ensuring seamless integration with your vehicle’s existing systems.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light (CEL) is illuminated with various trouble codes.
- ✔ Engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Misfiring or poor engine performance.
- ✔ Automatic transmission shifting issues.
- ✔ Communication errors with diagnostic scan tools.
A Plug-and-Play Solution Programmed for You
What sets this ECM apart is our professional programming service. We understand that a new ECM from the dealership requires expensive programming and setup. We eliminate that hassle. When you purchase this module, you simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then flash the unit with the latest, most up-to-date software calibrations directly from GM for your specific vehicle. This ensures that the module is ready for installation upon arrival, tailored perfectly to your car’s engine, transmission, and options.
This is a high-quality, tested component sourced from a salvaged vehicle. It offers the same performance and reliability as a new part without the high cost. By choosing a genuine, used GM part, you are ensuring perfect fitment and compatibility.
Important Post-Installation Steps
While we handle the primary software programming, modern vehicles have sophisticated anti-theft systems. After installing the new ECM, a Vehicle Theft Deterrent Relearn procedure will be necessary. This procedure pairs the new module to your vehicle’s ignition keys and security system. In most cases, this requires a professional scan tool with access to the GM programming system (such as TIS2Web). Additionally, other specific relearns, like a crankshaft position variation relearn or injector flow rate programming, may be required depending on your vehicle. Please be aware that these final setup procedures are the responsibility of the installer.
Frequently Asked Questions
What exactly is VIN programming?
VIN programming involves loading the correct factory software and calibrations onto the ECM based on your vehicle’s unique 17-digit Vehicle Identification Number. This ensures the computer works correctly with your specific engine, transmission, and options. We do this for you before shipping the part.
Is this part ready to install right out of the box?
The module is programmed and ready for physical installation. However, as with any ECM replacement on these vehicles, you will need to perform a Vehicle Theft Deterrent Relearn procedure after it’s installed to allow the car to start. Other minor relearns may also be necessary.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
How do I know if this fits my vehicle?
This ECM fits vehicles that require service number 12669908. Please check the fitment list on this page and, most importantly, match the service number on your original module to ensure compatibility.
What tools are needed for the theft relearn?
The theft relearn procedure typically requires a professional-grade diagnostic tool with a subscription to GM’s TIS2Web programming service. This is standard equipment for most automotive repair shops and dealerships.