Restore Peak Performance to Your GM Vehicle
Is your Buick Verano, Chevy Captiva, or Cadillac CTS running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer of your vehicle. A faulty ECM can lead to a cascade of frustrating issues, from poor fuel economy to a complete no-start condition. This replacement ECM, part number 12651994, is the definitive solution to restore your vehicle’s reliability and drivability.
We take the guesswork and hassle out of the repair process. Unlike sourcing a module from a salvage yard, this unit comes professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest, most stable software updates from GM, which often resolve underlying factory bugs and improve overall performance. This means you get a component that is ready for installation right out of the box, saving you a costly trip to the dealership for programming.
From the Diagnostic Bay
We had a 2013 Buick Verano come into the shop with a really tricky intermittent stalling problem. The owner had replaced the battery and spark plugs, but the car would still die at random stoplights. No consistent codes were being stored, just a few random communication errors. After hours of chasing wires, we hooked up a scope to the ECM’s power and ground circuits. We noticed a voltage drop inside the module itself right before a stall event. We installed one of our pre-programmed 12651994 ECMs, performed the quick 10-minute key relearn, and the problem was solved for good. It’s a reminder that when the symptoms are widespread and inconsistent, the vehicle’s main computer is often the culprit.
Is Your Vehicle’s Brain Failing? Common Symptoms of a Bad ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough or erratic idling.
- ✔ Complete no-start or intermittent starting problems.
- ✔ Transmission shifting issues or harsh gear changes.
- ✔ Error messages on the dashboard related to engine systems or stability control.
- ✔ Failure to communicate with a diagnostic scan tool.
The Superior Solution: A Pre-Programmed 2012-2013 Verano ECM
This isn’t just a replacement part; it’s a comprehensive repair solution. By providing us with your VIN during checkout, you ensure that the module you receive is a perfect match for your vehicle’s factory-installed options and security systems. This unit is a direct replacement for multiple GM part numbers, including 12651994, 12643248, and 12652814, making it a versatile fix for a wide range of cars, trucks, and SUVs. Installation is straightforward for any competent DIY mechanic or professional technician. Simply disconnect the battery, swap the modules, reconnect the battery, and perform the security relearn procedure if necessary. You’ll be back on the road with a vehicle that runs as it should.
Broad GM Compatibility
While this is a perfect fit for the 2012-2013 Buick Verano, its application spans across the GM family. This ECM is also the correct component for models such as the Chevy Orlando, Captiva Sport, Malibu, Impala, Camaro, Equinox; Cadillac CTS, SRX; GMC Terrain; and Buick LaCrosse, Regal, Enclave, among others. Please verify your original part number or consult the detailed fitment list to confirm compatibility with your specific vehicle and options.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you place your order, and the module will arrive ready to be installed, flashed with the latest GM software.
Where can I find my vehicle’s VIN?
Your 17-digit VIN can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a true plug-and-play installation?
For most vehicles, yes. After installation, you may need to perform a simple security relearn procedure (often called a key relearn), which typically involves turning the key to the ‘ON’ position for 10 minutes. This procedure does not require special tools and instructions are widely available online.
My original part number is 12643248. Will this part work?
Yes, absolutely. This ECM, 12651994, is the designated service replacement for several earlier part numbers, including 12643248 and 12652814. It contains the most current hardware and software revisions for your vehicle.
What is the benefit of getting the latest GM software?
Automakers frequently release software updates to fix bugs, improve transmission shifting logic, enhance fuel efficiency, and correct other drivability issues that were discovered after the vehicle was built. Our programming service ensures your vehicle benefits from these important improvements.