Is Your GM 3.6L Vehicle Acting Up? It Could Be The ECM.
If you’re experiencing perplexing issues like erratic engine behavior, a persistent Check Engine Light, or even a no-start condition in your 2010-2011 Cadillac STS, CTS, or other compatible GM vehicle, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the central computer of your vehicle’s engine, responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, it can cause a cascade of problems that are often difficult to diagnose, leading to frustration and costly, ineffective repairs.
The Right Solution for Your 2010-2011 STS ECM
This replacement Engine Control Module, part number 12635019, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork out of the repair process. Unlike a generic module from a parts store or salvage yard, each unit we provide is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module has the correct software and calibrations for your exact make, model, and options, making the installation process as straightforward as possible. We load the latest software updates from GM, which can often resolve underlying drivability issues the original software may have had.
From the Diagnostic Bay
We had a 2011 Buick Enclave come in with a complaint of random stalling and a check engine light with a slew of communication codes. The owner had already replaced the throttle body and a few sensors with no success. After checking the main power and ground circuits to the ECM, we found everything was solid. The symptoms pointed directly to an internal failure of the processor. Instead of guessing, we connected our diagnostic tool and saw the ECM’s data stream dropping out intermittently. We installed one of our VIN-programmed modules, performed the security relearn procedure, and the vehicle ran perfectly. It’s a classic case where chasing individual codes can be misleading, while addressing the core processing unit solves the problem completely.
Common Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) with various, often unrelated, trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ A complete no-start condition where the engine cranks but will not fire up.
- ✔ Poor fuel economy and a noticeable loss of engine power.
- ✔ Issues with the automatic transmission, such as harsh or erratic shifting.
- ✔ Problems with other electronic systems, as the ECM communicates with multiple modules.
- ✔ Failure to pass an emissions test.
Simple Process, Professional Results
Getting your vehicle back on the road is easy. After you complete your purchase, simply provide us with your vehicle’s VIN. Our technicians will then program this module with the correct, updated GM software specific to your car. This means that for most vehicles listed, the module arrives ready for a plug-and-play installation. Once installed, you may need to perform a simple security relearn procedure, which can often be done without special tools. For certain models like the 2010-2011 Camaro and Buick Lacrosse, the immobilizer system requires additional steps. For these vehicles, we will contact you with instructions to send us your original module so we can transfer the security information, ensuring a seamless, plug-and-play experience without the need for expensive dealer tools.
Guaranteed Fitment for Your Vehicle
This ECM is a direct replacement for part number 12635019 and is also compatible with part numbers 19300015, 19300014, 12617230, and 12636355. It is guaranteed to fit the following vehicles equipped with the 3.6L engine:
- 2010-2011 Cadillac STS (Electronic Control Module; RH engine, 3.6L)
- 2010-2011 Cadillac CTS (Electronic Control Module; RH front engine compartment, 3.6L)
- 2010-2011 Buick LaCrosse (Electronic Control Module; LH engine compartment, 3.6L)
- 2010 Buick Allure (Electronic Control Module; LH engine compartment, 3.6L)
- 2010-2011 Chevrolet Traverse (Electronic Control Module; behind fan shroud)
- 2010-2011 Chevrolet Camaro (Electronic Control Module; 3.6L)
- 2010-2011 GMC Acadia (Electronic Control Module; behind fan shroud)
- 2010-2011 Buick Enclave (Electronic Control Module; behind fan shroud)
- 2010 Saturn Outlook (Electronic Control Module; behind fan shroud)
Frequently Asked Questions
How do I provide my VIN number?
After placing your order, you can send us a message with your 17-digit VIN. We will also contact you if we don’t receive it promptly to ensure there are no delays in programming and shipping your part.
Is this module difficult to install?
The physical installation is typically straightforward. It involves disconnecting the battery, unplugging the electrical connectors from the old ECM, unbolting it, and then installing the new one in reverse order. Since we program it beforehand, no dealer-level computer is needed for the software setup on most models.
What is the security relearn procedure?
For many GM vehicles, it’s a simple process of turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. This allows the new ECM to synchronize with your vehicle’s anti-theft system. We can provide specific instructions for your vehicle.
Why do you need my old ECM for a Camaro or LaCrosse?
The Camaro and LaCrosse of this era use a more complex immobilizer system. To make the replacement truly plug-and-play, we need to read the unique security data from your original module and write it to the replacement. This avoids a complicated and costly programming procedure at a dealership. We will provide a shipping label and instructions for this process.
Will this fix my specific problem?
While this ECM is the solution for a wide range of engine management issues, we always recommend proper vehicle diagnostics. Please ensure the ECM has been identified as the point of failure. Check for good power, grounds, and communication wiring to the module before ordering.