Restore Peak Performance to Your 2012 Buick Enclave
Is your 2012 Buick Enclave experiencing frustrating issues like a persistent Check Engine Light, rough idling, stalling, or a sudden drop in fuel economy? These are common indicators of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel delivery, and emissions. A faulty ECM can disrupt the complex harmony of your engine’s systems, leading to unreliable performance and potentially costly damage if left unaddressed. This replacement Engine Control Module, part number 12651994, is the definitive solution to restore your vehicle’s original drivability and efficiency.
This isn’t just a generic, off-the-shelf part. We provide a fully programmed ECM tailored specifically to your vehicle. Upon purchase, you will provide us with your Vehicle Identification Number (VIN), and our technicians will flash the module with the latest, most stable software updates directly from General Motors. This critical step ensures seamless communication between the ECM and all other vehicle modules, eliminating the need for expensive dealership programming and ensuring a straightforward installation process.
From the Diagnostic Bay
We recently had a 2012 Acadia (which uses the same ECM platform as the Enclave) come into the shop with a bizarre, intermittent no-start condition. The owner had already replaced the battery, alternator, and starter to no avail. Scans showed no hard codes, just a few communication errors that would come and go. After hours of tracing wires, we focused on the ECM. On the surface, it looked fine. But by monitoring live data, we noticed the 5-volt reference signal to several key sensors would periodically drop out for a split second—just long enough to prevent the engine from starting, but not long enough to set a consistent trouble code. It was a classic case of internal ECM failure that standard tests couldn’t catch. Installing a correctly programmed ECM like this one solved the problem instantly. It’s a reminder that sometimes the most elusive electrical gremlins live inside the vehicle’s brain.
Symptoms of a Failing Engine Control Module
- ✔ Check Engine Light: The most common symptom, often with codes related to sensor circuits, module communication, or processor faults.
- ✔ Engine Stalling or Misfiring: The ECM may fail to correctly manage spark timing or fuel injection, leading to rough running and stalling.
- ✔ No-Start Condition: The module may not be able to activate the fuel pump or ignition coils, preventing the engine from starting at all.
- ✔ Poor Fuel Economy: Incorrect air/fuel mixture calculations can cause your vehicle to consume significantly more gasoline.
- ✔ Shifting Problems: In many GM vehicles, the ECM works with the Transmission Control Module (TCM). A failing ECM can cause harsh shifting or erratic transmission behavior.
- ✔ Intermittent Electrical Issues: Seemingly unrelated problems can sometimes be traced back to a failing computer that is disrupting the vehicle’s data network.
Why Choose Our Programmed 2012 Buick Enclave ECM?
Choosing the right replacement part is crucial for a lasting repair. Our process is designed to provide you with a reliable, ready-to-install component. We start with a quality, tested module and load it with your vehicle-specific software using your VIN. This ensures that all factory parameters, including anti-theft system (Passlock/VATS) information, are correctly configured. This plug-and-play approach saves you time and the high cost of a trip to the dealership for programming.
This module is a direct replacement for several part numbers, ensuring wide compatibility. It is guaranteed to fit and function in vehicles originally equipped with part numbers 12651994, 12643248, 12652814, or AA69. It fits a wide range of GM models, including the Buick LaCrosse, Cadillac CTS & SRX, Chevrolet Camaro, Captiva Sport, Equinox, Impala, Malibu, Orlando, Traverse, and GMC Acadia & Terrain for the 2012 model year and beyond in some cases. Please verify the part number from your original module to ensure a perfect match.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. This ECM comes fully programmed to your vehicle’s VIN. In most cases, it is a plug-and-play installation. However, some vehicles may require a simple security relearn procedure, which can be done without any special tools and instructions are readily available online.
Where do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your car.
Is this a brand new part?
This is a high-quality, fully tested replacement part that has been meticulously inspected and prepared to meet or exceed original factory specifications. It is programmed with the latest GM software for optimal performance.
What if my original part number is slightly different?
This ECM is a direct replacement for part numbers 12651994, 12643248, 12652814, and AA69. If your part number is listed here, this module will work for your vehicle. If you are unsure, please contact us with your VIN and original part number before ordering.
Where is the ECM located on a 2012 Buick Enclave?
On the 2012 Buick Enclave, as well as the related GMC Acadia and Chevrolet Traverse, the Engine Control Module is typically located behind the fan shroud in the engine compartment. Always disconnect the battery before attempting to remove or install the ECM.