Restore Peak Performance to Your GM Vehicle
Is your 2010-2011 Buick Enclave, GMC Acadia, or Chevrolet Traverse suffering from perplexing engine issues? A faulty Engine Control Module (ECM) is often the culprit behind problems like a persistent check engine light, erratic performance, poor fuel economy, or even a no-start condition. The ECM is the central computer of your vehicle’s engine, responsible for precisely managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, the entire system can be compromised.
This direct-fit Engine Control Module, part number 12636355, is the definitive solution to get your vehicle running reliably again. We take the guesswork and high dealership costs out of the equation. Unlike a generic module from a parts store, each unit we ship is professionally programmed with the latest GM-certified software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless integration and proper function right out of the box for most applications, restoring the original performance and efficiency you expect from your vehicle.
Diagnosing and Replacing Your 2010-2011 Enclave ECM
A failing engine computer can manifest in a variety of ways, often mimicking other sensor or component failures. Correctly identifying the root cause is key to an effective and cost-efficient repair. If you’re experiencing a combination of the symptoms below, it’s highly probable that your ECM is at the end of its service life. Replacing it with our pre-programmed unit is a straightforward process for a competent DIYer or any professional mechanic.
From the Diagnostic Bay
We had a 2011 GMC Acadia come into the shop with a complaint of random stalling and a check engine light that multiple other shops couldn’t solve. The owner had already replaced the throttle body, mass airflow sensor, and two oxygen sensors based on the codes. After hooking up our professional scan tool, we noticed that the live data for several key sensors would intermittently drop out completely—a classic sign of a failing processor within the ECM. Instead of continuing to replace good parts, we installed a VIN-programmed ECM. The data streams stabilized immediately, all codes were cleared, and the vehicle ran perfectly. It’s a powerful reminder that the ECM is the brain, and when it has a problem, it can send confusing signals everywhere else.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various, often inconsistent, trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic idling.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Transmission shifting problems or harsh shifts.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Misfire codes that persist even after replacing spark plugs and coils.
A Simple, Reliable Solution
Our process is designed for your convenience. After you place your order, simply provide us with your vehicle’s VIN. Our technicians will then flash the module with the correct, updated software for your specific make, model, and options. This critical step ensures all engine and transmission parameters are correct, preventing the performance issues that can arise from using a non-programmed or incorrectly programmed module. This unit is a direct replacement for multiple part numbers, including 19300015, 19300014, 12617230, 12636355, and 12635019.
Important Note for Camaro and Lacrosse Owners: Due to the specific anti-theft (immobilizer) systems in the 2010-2011 Camaro and Lacrosse, a simple VIN flash is not sufficient for a plug-and-play installation. To ensure full functionality, we require you to send us your original ECM. We will extract the immobilizer data and transfer it to the new module, making it a true plug-and-play solution for you. We will contact you with shipping instructions after your purchase.
Complete Vehicle Fitment List
This module is engineered to be a direct replacement for the following vehicles equipped with the 3.6L engine:
- Buick Allure: 2010
- Buick Enclave: 2010-2011
- Buick Lacrosse: 2010-2011
- Cadillac CTS: 2010-2011
- Cadillac STS: 2010-2011
- Chevrolet Camaro: 2010-2011
- Chevrolet Traverse: 2010-2011
- GMC Acadia: 2010-2011
- Saturn Outlook: 2010
Frequently Asked Questions
What is an ECM?
The Engine Control Module (ECM), also known as the Engine Control Unit (ECU), is your vehicle’s main computer. It controls the engine’s fuel delivery, spark timing, and emissions systems to ensure optimal performance, fuel efficiency, and low emissions.
Why does this ECM need my VIN?
Your Vehicle Identification Number (VIN) contains specific information about your car’s engine, transmission, and factory options. We use the VIN to load the exact GM software and calibrations your vehicle requires, ensuring it functions correctly without a trip to the dealer.
Is any additional programming required after installation?
For most compatible vehicles (excluding Camaro and Lacrosse), this module is sent ready for installation. In some cases, a simple security relearn procedure, which can be done without special tools, may be necessary. We include instructions for this common procedure.
Where is the ECM located on my 2010-2011 Enclave?
On the 2010-2011 Buick Enclave, as well as the Acadia, Traverse, and Outlook, the ECM is typically located behind the engine’s cooling fan shroud. Always disconnect the battery before attempting to access or replace any electronic modules.
What happens if I have a Camaro or Lacrosse?
If you purchase this for a 2010-2011 Camaro or Lacrosse, we will contact you with instructions to send your original ECM to us. We need it to transfer the specific anti-theft data to the replacement module, which makes it fully functional for your vehicle.