Restore Peak Performance to Your C7 Corvette
The Engine Control Module (ECM), often called the engine’s brain, is the master controller for your 2017 Corvette’s high-performance engine. It meticulously manages everything from fuel injection and ignition timing to emissions systems and throttle response. When the ECM begins to fail, it can lead to a cascade of frustrating and performance-robbing issues, turning your precision driving machine into an unpredictable source of headaches. This genuine GM Engine Control Module, part number 12674052, is the definitive solution to restore the crisp response and reliability you expect from your Corvette.
We take the guesswork out of the replacement process. Before this module ships, it is professionally programmed with the latest official GM software updates, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless integration with your Corvette’s existing systems and provides a solid foundation for the final installation steps.
Common Symptoms of a Failing Engine Control Module
If you’re experiencing any of the following issues, a faulty ECM could be the culprit. A proper diagnosis is always recommended, but these are hallmark signs of a module that’s on its way out:
- ✔ Persistent Check Engine Light (CEL) that won’t clear, or illuminates intermittently.
- ✔ Engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or unstable idling.
- ✔ Engine stalling, hesitation, or misfiring under load.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Transmission shifting problems or harsh engagement.
From the Diagnostic Bay
We had a 2017 CTS-V (which uses a similar ECM) come into the shop with a maddeningly intermittent stalling issue. The owner had already replaced the fuel pump and several sensors. No codes were stored. During a test drive with a high-end scanner, we noticed the data stream from the ECM would momentarily freeze just before the engine cut out. It was a classic case of an internal ECM fault that only appeared under specific thermal conditions. Swapping in a correctly programmed module like this one solved the problem instantly, saving the customer from further expensive and incorrect repairs.
The Direct-Fit Solution: A Programmed 2017 Corvette ECM
Don’t settle for a generic, unprogrammed module that will leave your vehicle immobilized. This unit is the correct component for your vehicle, and our programming service makes the replacement process as straightforward as possible. By providing your VIN at checkout, you ensure that the 2017 Corvette ECM you receive is loaded with the precise calibrations for your engine, transmission, and emissions equipment. This is the same process a dealership would follow, but delivered directly to you.
Important Installation & Relearn Procedures
Please be aware that while the module comes programmed to your VIN, it is not a simple “plug-and-play” installation. Modern vehicles have sophisticated anti-theft systems that must be synchronized with the new ECM.
A Vehicle Theft Deterrent (VTD) relearn is mandatory after installation. If this procedure is not performed, your vehicle will not start. This process requires a professional-grade scan tool with GM programming capabilities, such as the GM Tis2web or Techline Connect system. This is the responsibility of the installer. Additionally, other system initializations may be required depending on your vehicle’s specific configuration, such as:
- Crankshaft Variation Relearn
- Injector Flow Rate Programming
- Idle Learn Procedure
We strongly recommend professional installation by a qualified technician who is equipped to perform these essential final setup procedures.
Guaranteed Compatibility
This module is a direct replacement for several GM part numbers, ensuring wide compatibility. It is the correct fit for vehicles requiring part numbers: 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. While this listing focuses on the 2017 Corvette ECM, this part also fits a range of other high-performance GM cars and trucks from Cadillac, Chevrolet, and GMC, as detailed in the fitment list.
Frequently Asked Questions
How does the programming process work?
After you place your order, you must provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians use this VIN to download the latest, correct software from GM and flash it onto the module before it is shipped to you.
What happens if my car doesn’t start after I install the new ECM?
If the engine cranks but does not start, it is almost certainly because the Vehicle Theft Deterrent (VTD) relearn procedure has not been completed. This security handshake is required to allow the new ECM to function in your vehicle.
Can I perform the security relearn myself?
The relearn procedure requires a specific bi-directional scan tool with GM software access, like Tis2web or Techline Connect. It is not possible with standard OBD-II code readers. We recommend having the installation and relearn performed by a professional automotive technician.
Is this part truly plug-and-play?
It is programmed for your vehicle, which is a critical first step. However, due to the mandatory security relearn and other potential initializations, it is not considered fully plug-and-play. The final setup steps must be performed on the vehicle after installation.
Where can I find my vehicle’s VIN?
Your VIN can be found on a metal plate on the driver’s side of the dashboard (viewable through the windshield), on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.