Restore Peak Performance to Your Buick Lucerne
Is your 2006 Buick Lucerne suffering from erratic behavior, a persistent Check Engine Light, or a frustrating no-start condition? The Engine Control Module (ECM), the vehicle’s central computer, is often the source of these complex issues. It governs everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be widespread and difficult to diagnose. This direct replacement ECM is the definitive solution to restore your vehicle’s original performance, reliability, and efficiency.
This isn’t just a part in a box. We provide a comprehensive service that eliminates the most frustrating part of replacing an ECM: the programming. Before this module ships, our technicians will flash it with the latest official GM software updates, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures a seamless, plug-and-play installation process, saving you from an expensive and time-consuming trip to the dealership. You get a component that is ready to install right out of the box, tailored precisely for your car.
From the Diagnostic Bay
We had a 2006 Lucerne come into the shop with what the owner was certain was a failing transmission. It was shifting harshly and sometimes wouldn’t go into gear. He had already gotten a quote for thousands of dollars for a transmission rebuild. After hooking up our diagnostic scanner, we noticed erratic data coming from the ECM and communication errors with the Transmission Control Module (TCM). Instead of starting with the transmission, we swapped in a known-good, programmed ECM. The car immediately started shifting perfectly. The faulty ECM was sending bad signals, causing the transmission to behave incorrectly. This saved the customer a massive amount of money and fixed the root cause of the problem.
Common Symptoms of a Failing 2006 Lucerne ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stalling, stumbling, or misfiring while driving.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Loss of power and poor acceleration.
- ✔ Communication errors with diagnostic scan tools.
The Simple, Reliable Solution
Don’t let a faulty computer keep your car off the road. Our process is designed for both professional technicians and DIY mechanics. Simply place your order and provide us with your vehicle’s VIN. We handle the complex programming, ensuring all systems, including anti-theft and optional equipment, are correctly configured. The module you receive will be a direct fit, ready for installation. In most cases, the process involves disconnecting the battery, swapping the old module with the new one (typically located under the air cleaner box on the Lucerne), and reconnecting the battery. A simple security relearn procedure may be required, which can often be done without any special tools.
This module, service number 12602044, is also a direct replacement for a wide range of other GM service numbers, including 12590032, 12603530, 12605843, 12607096, 12630457, and 19210737. This ensures broad compatibility across numerous GM, Saab, and Isuzu models and years. Please review the detailed fitment list to confirm compatibility with your specific vehicle if it is not a 2006 Buick Lucerne.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. The main benefit of our service is that we program the module to your vehicle’s specific VIN before we ship it to you. It arrives ready to be installed, saving you hundreds of dollars in dealership programming fees.
How do I provide my VIN number?
After you complete your purchase, you can send us a message with your 17-digit VIN, or add it to the ‘notes’ section during checkout. We cannot ship your part until we receive the VIN to ensure correct programming.
Where is the ECM located on a 2006 Buick Lucerne?
On the 2006 Lucerne, the ECM is typically found in the engine bay, situated in the lower part of the air cleaner box assembly. Always disconnect the vehicle’s battery before attempting to remove or install the module.
My old module has a different part number. Will this still work?
Yes, it’s very likely. GM frequently updates part numbers. This module (12602044) is an interchangeable replacement for several other service numbers, including 12590032, 12603530, and more. Please check our compatibility list to confirm your original number is listed.
Will I need to perform any additional steps after installation?
In many cases, it’s a simple plug-and-play installation. However, some GM vehicles require a security relearn procedure (often called a CASE relearn or Passlock relearn) to sync the new ECM with your vehicle’s anti-theft system. This procedure can typically be done without special tools and instructions are widely available online.