2009-2011 Buick Lucerne ECM 12629019 Programmed to Your VIN

Restore Peak Performance to Your Buick Lucerne

Is your 2009, 2010, or 2011 Buick Lucerne suffering from perplexing issues like stalling, poor fuel economy, a persistent check engine light, or a complete no-start condition? The Electronic Control Module (ECM), the central computer of your vehicle, is often the culprit. This vital component manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be widespread and frustrating. This replacement ECM, service number 12629019, is the definitive solution to restore your vehicle’s factory performance, drivability, and reliability.

We take the guesswork and complexity out of the repair process. Unlike a generic module from a dealership or local parts store, this unit arrives at your doorstep fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest GM-certified software updates, ensuring optimal performance and compatibility. This means no expensive trips to the dealer for programming are required. It’s a direct-fit, plug-and-play solution designed to get you back on the road quickly and confidently.

Diagnosing a Faulty 2009-2011 Lucerne ECM

A failing ECM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing a combination of the symptoms below, it’s highly probable that your vehicle’s main computer is at fault. Replacing your 2009-2011 Lucerne ECM is a critical step in resolving these complex electronic issues and preventing further damage to your engine or transmission.

Common Symptoms of a Failing ECM

• ✔ Check Engine Light: The light is on, and you may have codes related to module communication, sensor circuits, or processor faults.
• ✔ Engine Stalling or Misfiring: The engine may randomly stall, run rough, or misfire as the ECM fails to properly control spark and fuel.
• ✔ No-Start Condition: The engine cranks but will not start because the ECM is not activating the fuel pump or ignition coils.
• ✔ Poor Fuel Economy: A significant and sudden drop in MPG can be caused by the ECM running an incorrect air/fuel mixture.
• ✔ Harsh or Erratic Shifting: The ECM works with the Transmission Control Module (TCM) to ensure smooth shifts. A fault can lead to poor transmission performance.
• ✔ Communication Issues: Your mechanic’s scan tool may be unable to communicate with the ECM, a clear sign of an internal failure.

Plug-and-Play Installation with VIN Programming

This isn’t just a part; it’s a complete service. When you place your order, you must provide us with your vehicle’s VIN. Our technicians use this information to flash the module with the exact software calibration your Buick Lucerne requires. This process ensures all factory settings for your engine, transmission, and options are correctly loaded. This module is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549, making it a versatile solution for a wide range of GM vehicles beyond the Lucerne.

While the module is programmed for a straightforward installation, some vehicles may require a security relearn procedure (often called a Passlock or anti-theft relearn) after the new ECM is installed. This is a simple process that can typically be done in your driveway without any special tools and involves a sequence of key turns. Instructions are readily available online for your specific model.