Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Buick, or Chevrolet suffering from frustrating and unpredictable issues? A persistent check engine light, unexplained stalling, poor fuel economy, or harsh transmission shifts are often symptoms of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, and when it falters, it can cause a cascade of problems that are difficult to diagnose. Take the guesswork out of your repair with this direct-fit, professionally programmed Programmed 12650256 Engine Control Module, designed to restore the precision and reliability you expect from your car.
Common Symptoms of a Failing ECM & Your Direct Solution
If you’re experiencing any of the following, a faulty engine computer is the likely culprit:
- Persistent Check Engine Light (CEL): Especially with communication-related Diagnostic Trouble Codes (DTCs) like U0100.
- Engine Performance Issues: Stalling, hesitation, rough idling, or a noticeable loss of power.
- No-Start Condition: The engine cranks but refuses to start, often due to a lack of fuel or spark command from the ECM.
- Poor Fuel Economy: An incorrect air/fuel mixture controlled by a failing ECM can drastically reduce your MPG.
- Erratic Automatic Transmission Shifting: The ECM works with the transmission controller, and a fault can lead to hard shifts or gear-hunting.
This unit is your definitive solution. We eliminate the most significant hurdle in replacing an ECM: the need for expensive dealership programming. We use your vehicle’s Vehicle Identification Number (VIN) to flash this module with the latest, most stable software updates from General Motors, ensuring it is ready to install and function perfectly with your specific vehicle systems right out of the box.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: Simply provide your VIN at checkout, and we handle the complex programming. This guarantees seamless integration and communication with your car’s other modules.
- ✔ No Dealership Visit Required: Save hundreds of dollars and valuable time by avoiding the need for a trip to the dealer for programming or calibration.
- ✔ Loaded with Latest GM Updates: Your new ECM will have the most current software, often correcting factory bugs and improving overall engine and transmission performance.
- ✔ Restores Original Functionality: Get rid of those nagging performance issues and drive with the confidence that your vehicle’s central computer is operating flawlessly.
- ✔ Direct-Fit Replacement: This Programmed 12650256 Engine Control Module is engineered to match the original’s fit and connections for a straightforward installation.
- ✔ This unit is backed by our one-year replacement warranty for your complete confidence.
Expert Insight: The ‘Ghost in the Machine’ Fix
We recently worked with a customer whose 2012 Cadillac CTS 3.6L had an intermittent stalling issue that two different shops couldn’t solve. They had replaced sensors and checked wiring harnesses to no avail. The problem was a failing processor inside the original ECM that would overheat and cut the signal to the fuel injectors. Once they installed our Programmed 12650256 Engine Control Module, the stalling vanished instantly. More than that, the owner reported that the car’s throttle response felt sharper and the transmission shifted more smoothly than it had in years—a direct result of the updated GM software we installed.
Frequently Asked Questions
What is the process after I place my order?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. We cannot ship the module until we have this information. Once we receive your VIN, our technicians will program the ECM with the latest GM software specific to your vehicle. The unit is then tested and shipped directly to you.
Is this a difficult part to install?
For most vehicles listed, installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors from the old ECM, unbolting it, and then installing the new one in reverse order. While the programming is done, some vehicles may require a simple security or key relearn procedure, which can often be performed without special tools. Instructions are widely available online for this process.
How do I find my vehicle’s VIN?
Your VIN can be found in several places: 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.
Will this computer fix my exact problem?
This ECM is a direct replacement for a faulty unit and will resolve issues caused by a failed computer. However, it’s essential that your vehicle has been properly diagnosed. This part will not fix problems related to other bad sensors, wiring faults, or mechanical issues.
What if my original part number is slightly different but my vehicle is listed?
GM often uses several interchangeable part numbers for the same component. The part numbers listed (e.g., 12616889, 12630908, 12637106) are all serviced by this module. As long as your vehicle make, model, and year are on the compatibility list, our VIN programming ensures it will work correctly.