Is Your GM 3.6L Vehicle Running Poorly?
If your 2010-2011 Cadillac CTS, Buick Lacrosse, Chevy Traverse, or other compatible GM vehicle is experiencing baffling issues like stalling, poor fuel economy, a persistent check engine light, or a no-start condition, the root cause is often a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle’s engine, meticulously managing fuel delivery, ignition timing, emissions systems, and communication with other modules. When it malfunctions, it can trigger a cascade of problems that are frustrating and difficult to diagnose.
This replacement Engine Control Module, part number 19300015, is the definitive solution to restore your vehicle’s original performance and reliability. We take the guesswork out of the repair by pre-programming the module specifically to your vehicle using your VIN. This ensures that all systems, including the anti-theft immobilizer and transmission controls, function exactly as they did from the factory.
From the Diagnostic Bay
We recently had a 2011 Buick Enclave come into the shop with a persistent misfire on cylinder 3. The owner had already replaced the spark plug, ignition coil, and fuel injector, but the problem remained. Diagnostic scans showed no signal from the ECM to the cylinder 3 injector. After confirming the wiring harness was intact, we identified the root cause: a failed injector driver inside the original ECM. Instead of continuing to replace perfectly good parts, we installed a correctly programmed replacement module. The Enclave started up immediately with a smooth idle, and the misfire was gone. This is a classic example of how a faulty ECM can mimic other component failures, leading to wasted time and money.
Common Symptoms of a Failing GM 3.6L ECM
- ✔ Persistent Check Engine Light (CEL) with communication or processor-related fault codes (e.g., U-codes, P0606).
- ✔ Intermittent or complete no-start condition where the engine cranks but won’t fire.
- ✔ Rough or unstable idle, engine stalling, and hesitation during acceleration.
- ✔ Noticeable decrease in fuel economy and loss of engine power.
- ✔ Erratic automatic transmission shifting or getting stuck in one gear.
- ✔ Multiple, unrelated sensor codes appearing simultaneously.
- ✔ Cooling fans running constantly, even when the engine is cold.
The Importance of a Programmed 2010-2011 Cadillac CTS ECM
Simply installing a used or new ECM into your vehicle will not work. Modern vehicles require the ECM to be programmed with the vehicle’s specific Vehicle Identification Number (VIN) and factory-installed options. This process, known as flashing, ensures the module communicates correctly with the anti-theft system, transmission, instrument cluster, and other onboard computers. Our service handles this critical step for you. We flash the module with the latest GM-released software updates, which often correct underlying drivability issues and improve overall performance and efficiency. By providing us with your VIN upon purchase, you receive a module that is ready for installation, saving you a costly trip to the dealership for programming.
Guaranteed Fitment and Compatibility
This module is a direct replacement for a wide range of GM vehicles equipped with the 3.6L V6 engine. It is compatible with the following part numbers:
- 19300015
- 19300014
- 12617230
- 12636355
- 12635019
This part will fit these makes and models with these options:
- ACADIA: 2010-2011 (Electronic Control Module; behind fan shroud)
- ALLURE: 2010 (Electronic Control Module; LH engine compartment), 3.6L
- CAMARO: 2010-2011 (Electronic Control Module; 3.6L)
- CTS: 2010-2011 (Electronic Control Module; RH front engine compartment), 3.6L
- ENCLAVE: 2010-2011 (Electronic Control Module; behind fan shroud)
- LACROSSE: 2010-2011 (Electronic Control Module; LH engine compartment), 3.6L
- OUTLOOK: 2010 (Electronic Control Module; behind fan shroud)
- STS: 2010-2011 (Electronic Control Module; RH engine), (3.6L)
- TRAVERSE: 2010-2011 (Electronic Control Module; behind fan shroud)
Please Note: For Chevrolet Camaro and Buick Lacrosse models, an additional step is required to ensure plug-and-play functionality. Due to the specific immobilizer system in these vehicles, we will need you to send us your original ECM. We will read the security data from your old module and transfer it to the replacement unit. We will contact you with shipping instructions after your purchase.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) contains critical information about your car’s specific options, engine, transmission, and security system. We use the VIN to load the exact, correct GM software onto your replacement ECM, ensuring it works perfectly with your vehicle right out of the box.
Is this part difficult to install?
The physical installation is straightforward for a moderately skilled DIYer. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. The location varies by model, as listed above. Because we pre-program the module, no special tools are needed for software setup.
Will I need to have a dealer perform any additional steps?
No. Our programming service eliminates the need for a dealership visit. For most compatible models, the module is plug-and-play. In some cases, a simple crankshaft position sensor relearn procedure may be required, which can be done with many common scan tools.
What is the special procedure for the Camaro and Lacrosse?
The Camaro and Lacrosse use a more complex anti-theft system. To make the replacement ECM truly plug-and-play, we must transfer the immobilizer data from your original module to the new one. After you place your order, we will contact you with instructions to send your old module to us for this data transfer service.
How do I know for sure my ECM is the problem?
While the symptoms listed are strong indicators, proper diagnosis is key. This usually involves a professional mechanic using a high-end scan tool to check for communication errors with the ECM and to rule out other potential causes like wiring or sensor faults. If codes like P0601, P0606, or U-codes are present, it’s a very strong sign the ECM is faulty.