Restore Peak Performance to Your GM Vehicle
Is your Corvette, Sierra, or Escalade suffering from erratic behavior, a persistent check engine light, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, controlling everything from fuel injection and ignition timing to emissions and transmission shifting. When it fails, the symptoms can range from frustratingly poor performance to leaving you stranded. This genuine GM engine control module, part number 12674472, is the definitive solution to restore your vehicle’s factory performance and reliability.
This isn’t just a replacement part; it’s a fully integrated solution. We program this module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This critical step ensures that the ECM is loaded with the correct factory calibration and the latest software updates from General Motors. This process eliminates compatibility guesswork and ensures the module communicates perfectly with all other systems in your vehicle, just as it did from the factory.
Is Your ECM Failing? Common Symptoms
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, a failing ECM could be the root cause. This 2017 Corvette Engine Module is designed to correct these issues.
- ✔ Check Engine Light (CEL) is illuminated with various communication or processor-related codes.
- ✔ Vehicle refuses to start or starts and immediately stalls.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine misfires, stumbles, or hesitates during acceleration.
- ✔ Rough or inconsistent idling.
- ✔ Automatic transmission shifts harshly or at the wrong times.
- ✔ Loss of power and overall poor engine performance.
- ✔ Intermittent issues that are difficult to diagnose.
The Importance of VIN Programming and Post-Installation Procedures
Modern vehicles are complex networks of modules that must communicate seamlessly. By providing us with your VIN, we ensure this ECM is a perfect digital match for your vehicle’s specific options and systems. However, the process doesn’t end with the programming. For security and operational integrity, GM vehicles require certain relearn procedures after an ECM replacement.
CRITICAL NOTICE: Upon installation, you or your technician will need to perform a Vehicle Theft Deterrent (VTD) relearn using a professional GM diagnostic tool (such as a Tech 2, MDI with GDS2, or Tis2web/Techline Connect access). This procedure syncs the new ECM with your vehicle’s security system. Without it, the vehicle will not start. Additionally, other procedures like the Crankshaft Position Variation Relearn may be necessary to ensure optimal engine timing and misfire detection. It is the buyer’s responsibility to ensure these procedures are completed by a qualified technician.
Broad Compatibility Across the GM Lineup
While this listing is focused on the 2017 Corvette Engine Module, this part (12674472) and its interchangeable numbers (12692068, 12704476, 12686382, 12674052, 12678815) fit a wide range of high-performance cars, trucks, and SUVs. Please verify your part number and check the detailed fitment list to confirm compatibility with your specific model, including various years of the Escalade, XTS, Tahoe, Yukon, CTS, Sierra, Suburban, and Silverado.
Frequently Asked Questions
What exactly is a VIN-programmed ECM?
A VIN-programmed ECM is an engine computer that has been loaded with the specific software and calibration file that matches your vehicle’s unique 17-digit Vehicle Identification Number. This ensures it works correctly with your engine, transmission, and all factory-installed options.
Is this part truly plug-and-play?
No. While the physical installation is straightforward (plugging it in), it is not fully ‘plug-and-play’. Post-installation electronic procedures, most importantly the Vehicle Theft Deterrent (VTD) relearn, are absolutely required for the vehicle to start and run.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot program and ship the module without it. Please double-check the VIN for accuracy to avoid delays.
What happens if I don’t perform the theft relearn?
If the VTD relearn is not performed, the vehicle’s anti-theft system will activate, preventing the engine from starting. This is a security feature, not a defect in the part.
Can my local mechanic perform the required relearn procedures?
Most professional repair shops with up-to-date diagnostic equipment for GM vehicles can perform the necessary relearn procedures. We recommend confirming with your mechanic that they have the capability (e.g., access to Techline Connect) before purchasing.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the original ECM, this replacement part will resolve the issue once installed and set up correctly. However, if the light is on for another reason (e.g., a bad sensor), it will not fix that underlying problem. Proper diagnosis is key.