Restore Your Vehicle’s Brainpower and Performance
The Engine Control Module (ECM), often called the engine computer, is the central command center for your vehicle’s engine. In a high-performance machine like the 2014-2016 C7 Corvette, or a workhorse like a Silverado or Sierra, the ECM’s function is absolutely critical. It meticulously manages dozens of parameters—from fuel injection timing and ignition spark to variable valve timing and emissions systems—to ensure optimal power, efficiency, and reliability. When this vital component begins to fail, it can cause a cascade of confusing and frustrating problems, leaving your vehicle running poorly or not at all.
This genuine GM Engine Control Module, part number 12662034, is the definitive solution for a wide range of GM vehicles experiencing ECM-related issues. We take the guesswork and hassle out of the replacement process. Before this module ever leaves our facility, it is professionally programmed with the latest official GM software, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless communication with all other modules in your vehicle, restoring its original factory performance and functionality without the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2015 Corvette Stingray come in with a bizarre set of symptoms. The owner complained of intermittent stalling at stoplights, a check engine light that would come and go, and occasionally, the cooling fans would run at full blast for no reason, even on a cold start. We scanned it and got a slew of communication error codes (U-codes) along with a few random misfire codes. After checking the main power and ground circuits to the ECM and finding them solid, we suspected the module itself was failing internally. We installed one of our VIN-programmed ECMs, performed the security relearn procedure, and the car immediately ran like it just rolled off the showroom floor. All the strange electrical gremlins vanished. It’s a perfect example of how a failing ECM can manifest as more than just a simple engine problem.
Common Symptoms of a Failing GM ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine misfires, stumbling, or rough idling.
- ✔ A noticeable decrease in fuel economy.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Unexplained stalling, especially when coming to a stop or under load.
- ✔ Poor acceleration and overall lack of engine power.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Communication error codes with other vehicle modules (TCM, BCM).
Why Choose Our Pre-Programmed 2014-2016 Corvette ECM?
Replacing an ECM isn’t just about swapping a part. The new module must be correctly initialized to your specific vehicle. Our service handles this critical step for you. By providing your VIN during checkout, you receive a module that is ready for installation. This direct-fit, pre-programmed 2014-2016 Corvette ECM is flashed with the most current GM calibrations, which often include important drivability and performance improvements over the original software. This not only fixes your current issues but also ensures your vehicle’s engine management system is fully up-to-date.
Simple Process, Professional Results
- ✔ Place Your Order: Add this module to your cart and complete the purchase.
- ✔ Provide Your VIN: Reply to your order confirmation email with your vehicle’s 17-digit VIN. This is crucial for correct programming.
This module is a direct replacement for a variety of part numbers, including 12692067, 12676230, 12656993, 12672537, and more, ensuring broad compatibility across the GM lineup. Whether you’re driving a Corvette, Camaro, Silverado, Sierra, CTS, or Escalade, this programmed ECM is the reliable way to get your vehicle back in top condition.
Frequently Asked Questions
What information do you need from me?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN) to program the module correctly. Please provide this after you place your order.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and removing a few bolts and electrical connectors. However, after installation, a security relearn procedure is almost always required. This procedure varies by model but is often simple to perform. We recommend installation by a qualified technician if you are not comfortable with automotive electronics.
Will this fix my check engine light?
If the check engine light and other symptoms are caused by a faulty ECM, this replacement part will resolve the issue. It’s essential to properly diagnose the problem first, as other failing sensors or components can cause similar symptoms.
Is this a plug-and-play part?
Because we pre-program it to your VIN, it is as close to plug-and-play as possible. The only additional step is the security relearn procedure, which pairs the new ECM to your vehicle’s anti-theft system. No dealership programming is required.
How do I know if this ECM fits my vehicle?
This module fits a wide range of 2014-2016 GM vehicles. Please check the detailed fitment list on this page and ensure your original part number is listed as a compatible replacement. Providing your VIN ensures we program it for your exact make and model.