Is Your GM Vehicle Running Rough? The ECM Might Be the Culprit.
The Engine Control Module, or ECM, is the central computer of your vehicle’s powertrain. It’s responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can cause a cascade of confusing and frustrating problems. If your 2010-2011 Buick Enclave, GMC Acadia, Chevy Traverse, or other compatible GM vehicle is experiencing erratic behavior, a faulty ECM is a likely cause. This replacement ECM, part number 12635019, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
From the Diagnostic Bay
We had a 2011 GMC Acadia come into the shop with a persistent check engine light and a complaint of poor acceleration and random stalling at stoplights. The owner had already replaced the throttle body and two oxygen sensors based on codes, but the problem persisted. After hooking up our professional scan tool, we noticed that the live data streams from the engine sensors were erratic and inconsistent, pointing away from the sensors themselves and toward the computer processing the information. We confirmed the ECM was failing. Instead of another expensive guess, we installed a VIN-programmed ECM just like this one. The vehicle immediately ran smoothly, all data streams stabilized, and the check engine light was gone for good. It’s a classic case where treating the root cause—the faulty computer—saved the customer from replacing more perfectly good parts.
Common Symptoms of a Failing Engine Control Module
- ✔ Check Engine Light: An illuminated or flashing Check Engine Light (CEL) is the most common indicator. You may see codes related to sensor circuits, communication errors (U-codes), or processor faults.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, run rough, or misfire as the ECM fails to properly control spark and fuel.
- ✔ No-Start Condition: A completely failed ECM can prevent the engine from starting at all, as it won’t be able to activate the fuel pump or ignition system.
- ✔ Poor Fuel Economy: If the ECM isn’t calculating the air-fuel mixture correctly, you’ll notice a significant drop in your vehicle’s gas mileage.
- ✔ Transmission Shifting Problems: The ECM works with the Transmission Control Module (TCM). A failing ECM can cause harsh shifting, delayed engagement, or the transmission getting stuck in one gear.
- ✔ Performance Issues: You might experience a noticeable loss of power, poor acceleration, or hesitation, especially under load.
The Right Solution: A Pre-Programmed 2010-2011 Enclave ECM
Don’t settle for a generic, unprogrammed module that will require an expensive trip to the dealership. This ECM is a direct-fit replacement for your original unit and comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest, most stable software updates from General Motors before it ships. This ensures optimal performance and corrects many of the software-related issues that may have plagued the original factory programming. The process is simple: you place your order, provide us with your VIN, and we handle the complex programming. The module arrives at your door ready for installation.
This ECM is a direct replacement for the following part numbers:
- ✔ 19300015
- ✔ 19300014
- ✔ 12617230
- ✔ 12636355
- ✔ 12635019
Guaranteed Fitment for These Vehicles:
This module is engineered to work seamlessly with the 3.6L engine in the following makes and models:
- 2010-2011 Buick LaCrosse (Electronic Control Module; LH engine compartment)
- 2010-2011 Chevrolet Traverse (Electronic Control Module; behind fan shroud)
- 2010-2011 Cadillac CTS (Electronic Control Module; RH front engine compartment)
- 2010-2011 Chevrolet Camaro (Electronic Control Module)
- 2010 Saturn Outlook (Electronic Control Module; behind fan shroud)
- 2010 Buick Allure (Electronic Control Module; LH engine compartment)
- 2010-2011 Buick Enclave (Electronic Control Module; behind fan shroud)
- 2010-2011 GMC Acadia (Electronic Control Module; behind fan shroud)
- 2010-2011 Cadillac STS (Electronic Control Module; RH engine)
Frequently Asked Questions
Why do you need my VIN?
Your vehicle’s VIN (Vehicle Identification Number) is essential. It allows us to load the exact GM-specified software for your car’s unique configuration, including engine, transmission, and emissions options. This ensures the ECM works perfectly right out of the box.
Is this ECM difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. However, after installation, some vehicles may require a security relearn procedure (often called a Passlock or anti-theft relearn), which can usually be done without special tools. We can provide instructions for this.
What is the special procedure for the Camaro and LaCrosse?
For the 2010-2011 Camaro and LaCrosse, the immobilizer (anti-theft) data is uniquely tied to the original ECM. To make the replacement plug-and-play, we require you to send us your old module. We will read this specific data and program it into the new unit, so it communicates correctly with your key and security system.
Will this fix my check engine light?
If the check engine light and other symptoms are caused by a faulty ECM, this part will be the solution. It is crucial to have a proper diagnosis performed to confirm the ECM is the point of failure before ordering.
Is this a new or used part?
This is a high-quality, tested, and verified used OEM component. Each unit is inspected and programmed with the latest GM software to ensure it meets or exceeds original factory performance standards.