Restore Peak Performance to Your C7 Corvette
The Engine Control Module (ECM), often called the engine computer, is the electronic brain of your 2014-2016 Corvette. It meticulously manages every critical engine function, from fuel injection and spark timing to emissions controls and transmission communication. When the ECM begins to fail, it can cause a cascade of frustrating and difficult-to-diagnose problems, leaving your high-performance vehicle running poorly or not at all. This replacement ECM, part number 12663391, is the definitive solution to restore your vehicle’s factory performance and reliability.
We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store, this unit is professionally programmed specifically for your vehicle using your unique Vehicle Identification Number (VIN). We install the latest, most stable software updates from GM, ensuring optimal performance, fuel efficiency, and compatibility. This means no expensive trips to the dealership for programming—it arrives at your door ready for installation.
From the Diagnostic Bay
We had a 2015 Corvette Stingray come into the shop with a complaint of intermittent stalling at stoplights and a persistent P0606 (ECM Processor Fault) code. The owner had already replaced the MAF sensor and spark plugs, chasing the problem without success. The symptoms were erratic, making diagnosis tricky. After verifying power and ground to the module and confirming the wiring harness was intact, we pinpointed the internal fault within the original ECM. A failing processor was causing unpredictable commands to the fuel and ignition systems. We installed one of our VIN-programmed modules, performed the quick security relearn, and the car ran perfectly. The ghost in the machine was gone, and the Corvette’s legendary performance was fully restored.
Symptoms of a Failing Corvette Engine Control Module
A faulty ECM can manifest in various ways. If you’re experiencing any of the following issues, your engine computer may be the culprit:
- ✔ Persistent Check Engine Light: Often with codes related to internal processor faults (e.g., P0601-P0606), sensor reference voltage, or communication errors.
- ✔ Engine Misfires or Stumbling: The engine may run rough, hesitate on acceleration, or feel down on power due to incorrect fuel and spark commands.
- ✔ No-Start or Hard-Start Condition: The ECM may fail to activate the fuel pump or ignition coils, preventing the engine from starting.
- ✔ Reduced Fuel Economy: Inefficient engine operation caused by incorrect air/fuel mixture calculations can lead to a noticeable drop in MPG.
- ✔ Erratic Automatic Transmission Shifting: The ECM communicates with the Transmission Control Module (TCM) to ensure smooth shifts. A faulty ECM can cause harsh or delayed shifting.
- ✔ Intermittent Stalling: The engine may shut off unexpectedly while driving or idling for no apparent reason.
The Importance of VIN-Specific Programming
Modern vehicles like the C7 Corvette have complex electronic systems that are tied to the VIN. This includes security systems (immobilizer), specific emissions calibrations, and options unique to your car. Our programming service ensures that the replacement module is a perfect digital match for your vehicle. Simply provide us with your 17-digit VIN during or after checkout, and our technicians will handle the rest. This critical step ensures a seamless installation and prevents compatibility issues that would otherwise require advanced dealer-level scan tools to resolve.
Direct Replacement for Multiple Part Numbers
This module is a direct, compatible replacement for a range of original equipment part numbers, ensuring wide-ranging applicability. It is functionally identical and interchangeable with the following part numbers:
12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, 12669318
Verified Vehicle Fitment
While this is the primary module for the 2014-2016 Corvette, it also fits a wide variety of other GM cars and trucks. Please verify your original part number or consult the list below:
- ATS (2014-2016)
- CAMARO (2016)
- CANYON (2015-2016)
- COLORADO (2015-2016)
- CORVETTE (2014-2016)
- CTS (2014-2016)
- ESCALADE / ESV (2015-2016)
- SIERRA 1500 / DENALI (2014-2016)
- SILVERADO 1500 (2014-2016)
- SUBURBAN 1500 (2015-2016)
- TAHOE (2015-2016)
- XTS (2014-2016)
- YUKON / XL 1500 (2015-2016)
Note: Always match your original part number or confirm fitment with your vehicle’s specific options.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential for us to program the module with the correct software, security information, and vehicle-specific options for your Corvette. This ensures the part works correctly right out of the box without needing a trip to the dealer.
Is this part difficult to install?
For the 2014-2016 Corvette, the ECM is located on the right-hand side, under the cowl panel. Installation is straightforward for someone with moderate mechanical skill. It involves disconnecting the battery, removing the cowl cover, and swapping the electrical connectors. No special tools are typically required.
Will I need to perform any other procedures after installation?
In most cases, you may need to perform a simple security relearn procedure, also known as a Pass-Key or anti-theft relearn. This procedure can usually be done without any special tools and involves a sequence of key cycles. Instructions are widely available online or in service manuals.
What happens if I install it without programming?
An unprogrammed ECM will not work in your vehicle. The engine will not start due to the anti-theft system, and there will be numerous communication errors with other modules in the car. Our required VIN programming service prevents this.
How can I be sure this is the correct part?
The best way is to match the part number from your original ECM to one of the compatible numbers listed (12663391, 12692067, etc.). If you are unsure, please contact us with your VIN, and we will be happy to verify the correct fitment for you.