Restore Peak Performance to Your Buick Lucerne
Is your 2009, 2010, or 2011 Buick Lucerne suffering from perplexing issues like a persistent check engine light, rough idling, poor fuel economy, or unexpected stalling? These are common indicators of a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, responsible for managing everything from the fuel injectors and ignition timing to transmission shifting and emissions controls. When it begins to fail, it can cause a cascade of problems that are frustrating and difficult to diagnose. This replacement ECM, service number 12630186, is the definitive solution to restore your vehicle’s reliability and drivability.
From the Diagnostic Bay
We had a 2010 Lucerne with the 3.9L V6 come into the shop with a complaint of intermittent stalling at stoplights and harsh, unpredictable transmission shifts. The owner had already replaced the throttle body and a few sensors with no luck. There were no specific transmission codes, just a generic P0606 (ECM Processor Fault) that would come and go. After verifying all power and ground connections to the module were solid, we knew the issue was internal to the computer. We installed a VIN-programmed ECM, performed the security relearn procedure, and the car immediately ran like new. The stalling vanished, and the transmission shifted smoothly through all gears. It’s a classic case where the ECM itself was the root cause of seemingly unrelated problems.
Is Your Buick Lucerne Showing These Symptoms?
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, a failing ECM is a likely culprit:
- ✔ Persistent Check Engine Light (CEL) with various or no specific codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Loss of power and sluggish acceleration.
The Direct-Fit Solution: A Programmed 2009-2011 Lucerne ECM
Don’t let a faulty computer keep your car off the road. This module is a direct-fit replacement for your original unit. The most critical part of the replacement process is the software programming, and we handle that for you. Upon purchase, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the module with the latest, most up-to-date GM-certified software specific to your exact vehicle configuration. This ensures that the ECM correctly communicates with your engine, transmission, anti-lock brakes, and security systems right out of the box. This plug-and-play convenience saves you a costly trip to the dealership and eliminates the need for specialized programming tools.
Guaranteed Compatibility
This ECM is the correct replacement for a wide range of General Motors vehicles beyond the Buick Lucerne. It is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549. By programming the unit to your specific VIN, we ensure perfect compatibility and function for your vehicle, whether it’s a Lucerne, Malibu, Impala, Silverado, or any of the other models listed in the fitment guide. The key is the VIN-specific software that makes this module the brain of your particular car. A properly functioning 2009-2011 Lucerne ECM is essential for the health and longevity of your vehicle’s powertrain.
Frequently Asked Questions
What do I need to do after I purchase this ECM?
After you complete your purchase, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot ship the module without it, as the programming is essential for the part to function in your car.
Is this part difficult to install?
For the 2009-2011 Buick Lucerne, the ECM is conveniently located in the lower part of the air cleaner box, making it relatively accessible. Installation typically requires basic hand tools. Always disconnect the negative battery terminal before beginning the installation.
Will any additional procedures be required after installation?
In many cases, you may need to perform a simple security relearn procedure, also known as a VATS relearn. This can usually be done without any special tools and involves a series of key cycles. Instructions are widely available online or in service manuals.
My original part has a different service number. Will this still work?
Yes. GM often supersedes part numbers over time. This module is a verified replacement for a range of service numbers, including 12597125, 12612397, and others. As long as your vehicle is listed in the compatibility chart, our VIN programming will ensure it works perfectly.
Is this a plug-and-play module?
Yes, because we program it to your VIN before shipping, it is designed to be a plug-and-play installation. This eliminates the need for a trip to the dealer for expensive programming.