The Brain of Your Engine: Restoring Performance to Your GM 3.6L Vehicle
Is your 2010-2011 Cadillac STS, CTS, or other GM 3.6L vehicle running poorly? Are you battling a persistent Check Engine Light, experiencing random stalling, or noticing a sudden drop in fuel economy? These are classic signs that the very core of your engine’s management system, the Engine Control Module (ECM), may be failing. The ECM is the central computer responsible for calculating and managing everything from fuel injection and ignition timing to transmission shift points and emissions control. When it falters, the entire vehicle’s performance and reliability are compromised.
This replacement Engine Control Module, corresponding to GM part number 19300015 and its alternatives, is the definitive solution to get your vehicle back on the road and running as the factory intended. We take the guesswork and complexity out of the replacement process. Unlike a generic, off-the-shelf part, this ECM is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN). This ensures that all factory calibrations, software updates, and vehicle-specific options are correctly loaded, making for a seamless and effective repair.
From the Diagnostic Bay
We once had a 2011 Buick Enclave come in that was driving the owner crazy. The vehicle would intermittently stall at red lights and had a rough idle that three different shops couldn’t solve. The owner had already spent a small fortune replacing the spark plugs, ignition coils, and even a mass airflow sensor. When we hooked up our professional scan tool, we noticed something subtle: the data stream from the ECM would momentarily freeze just before a stall. There were no hard codes pointing directly to the ECM, but the data told the story. The internal processor was failing under load. We installed a VIN-programmed ECM, performed the security relearn procedure, and the Enclave ran like new. It’s a classic case of how a failing computer can mimic mechanical problems, making proper diagnosis absolutely critical.
Solving Issues with a Programmed 2010-2011 STS ECM
A failing ECM doesn’t just cause minor annoyances; it can lead to significant drivability problems and even leave you stranded. By replacing your old, faulty unit with this precisely programmed module, you are directly addressing the root cause of these complex electronic issues. Our process is simple: you provide your VIN during checkout, and our technicians use official GM equipment to flash the module with the latest, most stable software available for your exact vehicle configuration. This critical step ensures compatibility and proper communication between the ECM and all other modules on your vehicle, such as the Transmission Control Module (TCM) and Body Control Module (BCM).
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various codes, especially communication or processor fault codes (e.g., P0606).
- ✔ Unexplained engine misfires, stumbling, or hesitation during acceleration.
- ✔ The engine cranks but refuses to start.
- ✔ A significant and sudden decrease in fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Cooling fans running constantly or not turning on at all.
- ✔ Failure to communicate with a diagnostic scan tool.
Wide-Ranging GM 3.6L Compatibility
This module is a direct replacement for a wide array of popular GM vehicles from the 2010-2011 model years equipped with the 3.6L V6 engine. Please verify your part number and vehicle application. This unit is compatible with part numbers: 19300015, 19300014, 12617230, 12636355, and 12635019.
Vehicle Fitment:
- Buick Allure: 2010 (3.6L)
- Buick Enclave: 2010-2011
- Buick Lacrosse: 2010-2011 (3.6L)
- Cadillac CTS: 2010-2011 (3.6L)
- Cadillac STS: 2010-2011 (3.6L)
- Chevrolet Camaro: 2010-2011 (3.6L)
- Chevrolet Traverse: 2010-2011
- GMC Acadia: 2010-2011
- Saturn Outlook: 2010
Important Note for Camaro & Lacrosse Owners: Due to the specific anti-theft (immobilizer) systems in the 2010-2011 Camaro and Lacrosse, a simple VIN program is not sufficient for a plug-and-play installation. For these two models, we require you to send us your original ECM. We will then extract the unique immobilizer data and clone it to the new module, ensuring it works seamlessly with your existing keys and security system. We will contact you with shipping instructions after your purchase.
Frequently Asked Questions
Why do you need my vehicle’s VIN?
The VIN is essential because it allows us to access the specific GM database for your vehicle. We use it to load the correct software, engine calibrations, and transmission settings that match the exact options your car was built with. This prevents compatibility issues and ensures optimal performance.
Is any additional programming required after installation?
In most cases, you will need to perform a security relearn procedure (also known as a CASE learn or anti-theft relearn) after installation. This syncs the new ECM with your vehicle’s security system and keys. This procedure can often be done without special tools and instructions can be readily found online for your specific model.
Where is the ECM located on my vehicle?
The location varies by model. For many of the SUVs like the Acadia, Enclave, and Traverse, it is located behind the fan shroud. For sedans like the STS and CTS, it’s often found in the engine compartment on the passenger (RH) side. For the Lacrosse/Allure, it’s typically on the driver’s (LH) side of the engine compartment. Always disconnect the battery before attempting removal or installation.
What is the process for Camaro and Lacrosse models?
If you purchase this ECM for a 2010-2011 Camaro or Lacrosse, we will contact you after your order with instructions to send your original ECM to us. We will read the immobilizer data from your old unit and write it to the replacement. This makes the new module plug-and-play, avoiding complex key programming. We then ship both modules back to you.
How can I be sure the ECM is the problem?
While this part will fix any issue caused by a faulty ECM, we always recommend a thorough diagnosis by a qualified technician. Problems like bad grounds, wiring issues, or faulty sensors can sometimes mimic ECM failure. Confirming the diagnosis before ordering will save you time and money.