Is Your GM Vehicle Acting Up? The ECM Might Be the Culprit.
If you’re dealing with a persistent Check Engine Light, erratic engine behavior, stalling, or a no-start condition in your Buick Enclave, GMC Acadia, or other compatible GM vehicle, a failing Engine Control Module (ECM) is a likely cause. The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions controls. When it fails, it can create a cascade of frustrating and difficult-to-diagnose problems. This replacement ECM, part number 12635019, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We recently had a 2011 GMC Acadia in the shop with a maddening intermittent stalling problem. The owner had already spent a small fortune replacing sensors and even the fuel pump, but the issue persisted. There were no hard fault codes stored, just a history of random communication errors. After connecting our diagnostic scanner and monitoring live data, we finally caught it: the ECM would momentarily drop all communication, causing the engine to shut down. It was a classic case of internal module failure that doesn’t always set a specific “bad ECM” code. Replacing the unit with a properly programmed module like this one resolved the issue completely, saving the customer from further guesswork and unnecessary repairs.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light with codes like P0601, P0602, P0606, or other internal processor faults.
- ✔ Engine misfires, stumbling, or hesitation during acceleration.
- ✔ Unexplained drop in fuel economy.
- ✔ Vehicle entering ‘Limp Mode’ or ‘Reduced Engine Power’ mode.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Intermittent or complete no-start condition, even with a good battery and starter.
- ✔ Communication issues with diagnostic scan tools.
The Critical Importance of a Programmed 2010-2011 Enclave ECM
In modern vehicles, you can’t simply swap a major computer like the ECM. Each module is coded specifically to the vehicle’s unique Vehicle Identification Number (VIN). This programming configures the ECM for your exact engine, transmission, emissions system, and factory-installed options. Our professional programming service eliminates the guesswork and the need for an expensive trip to the dealership. We flash this module with the latest, most stable GM-approved software for your specific VIN. This ensures that when you receive the part, it is ready for installation and will communicate perfectly with the other modules in your vehicle.
Our Simple, Professional Process
- Place Your Order: Add this ECM to your cart and complete the checkout process.
- Provide Your VIN: After your purchase, you will need to provide us with your vehicle’s 17-digit VIN. You can typically find this on the driver’s side of the dashboard (visible through the windshield) or on the sticker in the driver’s door jamb.
- We Program & Ship: Our technicians will use your VIN to flash the module with the correct GM software and updates. We then ship the ready-to-install part directly to you.
Special Note for Camaro & LaCrosse Owners: For these specific models, the anti-theft (immobilizer) data is stored uniquely within the ECM. To ensure a true plug-and-play experience without additional security relearn procedures, we require your original module to transfer this critical data. We will contact you with simple instructions after your purchase.
This ECM Fits the Following Vehicles:
This module is a direct replacement for part numbers 19300015, 19300014, 12617230, 12636355, and 12635019 on the following models:
- 2010-2011 Buick LaCrosse (3.6L)
- 2010-2011 Chevrolet Traverse
- 2010-2011 Cadillac CTS (3.6L)
- 2010-2011 Chevrolet Camaro (3.6L)
- 2010 Saturn Outlook
- 2010 Buick Allure (3.6L)
- 2010-2011 Buick Enclave
- 2010-2011 GMC Acadia
- 2010-2011 Cadillac STS (3.6L)
Frequently Asked Questions
What exactly does the ECM do?
The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is the main computer that controls all aspects of your vehicle’s engine performance. It reads data from dozens of sensors to manage fuel delivery, spark timing, variable valve timing, and emissions systems to provide optimal power, efficiency, and low emissions.
Is this module ready to install when I receive it?
Yes, for most vehicles. We program it using your VIN so it’s ready to be installed. Some vehicles may require a simple, tool-free “security relearn” procedure after installation, which typically involves turning the key on and off in a specific sequence. We can provide instructions for this common procedure.
Where can I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found in several places: on a metal plate on the driver’s side of the dashboard visible through the windshield, on a sticker inside the driver’s door jamb, and on your vehicle’s registration and insurance documents.
What happens after I place my order?
Once you complete your purchase, we will contact you via email to request your vehicle’s VIN. As soon as we receive it, our technicians will program the module and prepare it for shipment, typically within one business day.
Why is VIN-specific programming so important?
VIN programming is essential because it loads the correct software file for your car’s exact configuration—including its engine, transmission, tire size, gear ratios, and emissions equipment. Using a non-programmed or incorrectly programmed module can lead to poor performance, warning lights, and even prevent the vehicle from starting.
Why do you need my old ECM for a Camaro or LaCrosse?
The Camaro and LaCrosse models of this era store critical vehicle security and anti-theft information directly on the ECM. To avoid complex and expensive dealer-only procedures, we transfer this data from your old module to the replacement. This makes the new part completely plug-and-play, saving you time and money.