Is Your 2010-2011 LaCrosse Running Rough or Not Starting At All?
As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can turn a reliable car into a source of constant frustration. If your Buick LaCrosse is experiencing issues like stalling for no reason, a persistent check engine light with a flurry of codes, poor fuel economy, or a complete no-start condition, the ECM is a very likely culprit. The 3.6L engine used across many GM platforms is a workhorse, but its computer can be susceptible to failure over time due to heat and vibration in the engine bay.
A Technician’s Real-World Diagnostic Story
“A customer’s 2011 LaCrosse came in last week with these exact symptoms. The car would randomly die at stoplights and sometimes wouldn’t restart for 10-15 minutes. The dash was lit up with multiple, seemingly unrelated trouble codes. After verifying the wiring harness and power/ground supplies to the module were solid, we confirmed the ECM itself was failing internally—a classic case of processor malfunction. Replacing the ECM with a properly programmed unit solved every single issue instantly.”
The Brain of Your Engine, Restored
The ECM is the central computer for your engine. It precisely controls the fuel injectors, ignition timing, and dozens of other parameters to ensure your vehicle runs smoothly and efficiently. When it starts to fail, you get chaotic performance because the engine’s ‘brain’ is giving bad commands. This isn’t just an inconvenience; it can be a serious safety issue if your car stalls in traffic.
This ECM is the direct, reliable solution to get your vehicle back in top form. It’s not just a part in a box; it’s a comprehensive service designed to make your repair as simple as possible.
What We Do For You: The Programming Process
Modern vehicles are complex, and you can’t just swap an ECM from one car to another. It needs to be specifically coded to your vehicle’s Vehicle Identification Number (VIN) and its unique options. We handle that for you.
- ✔ VIN Programming: After your purchase, you’ll provide us with your VIN. We then flash this module with the latest, most stable software updates directly from GM. This ensures optimal performance and compatibility.
- ✔ Immobilizer Service (for LaCrosse & Camaro): This is a critical step that many others miss. For the LaCrosse and Camaro, the anti-theft (immobilizer) data is stored in the original ECM. To make this a true plug-and-play installation, we require you to send us your old module. We have the specialized tools to safely extract this security data and transfer it to your new ECM. This saves you a costly trip to the dealership and the hassle of reprogramming keys. We will contact you with instructions after your purchase.
- ✔ Guaranteed Compatibility: This module is a direct replacement for a range of part numbers, ensuring you get the correct component.
This ECM is a Direct Fit For The Following 3.6L Vehicles:
- ✔ Buick LaCrosse: 2010-2011
- ✔ Buick Allure: 2010
- ✔ Buick Enclave: 2010-2011
- ✔ Chevrolet Traverse: 2010-2011
- ✔ Chevrolet Camaro: 2010-2011
- ✔ Cadillac CTS: 2010-2011
- ✔ Cadillac STS: 2010-2011
- ✔ GMC Acadia: 2010-2011
- ✔ Saturn Outlook: 2010
Replaces These Common Part Numbers:
This ECM is the correct service replacement for part numbers 19300015, 19300014, 12617230, 12636355, and 12635019. Ordering this part ensures you receive a fully compatible and correctly updated module for your vehicle.