Is Your Buick Lucerne Running Rough?
If your 2009, 2010, or 2011 Buick Lucerne is suffering from frustrating issues like a persistent check engine light, unexplained stalling, rough idling, or a sudden drop in fuel economy, the root cause is often a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it starts to fail, it can create a cascade of performance problems that are difficult to diagnose. Don’t let a faulty computer keep your car off the road. This direct-fit, pre-programmed ECM is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2010 Lucerne come into the shop with a list of ghost-in-the-machine problems. The owner complained of intermittent stalling at stoplights and a check engine light that would come and go with various, unrelated codes. We checked the wiring, sensors, and fuel system, but everything tested fine. On a hunch, we monitored the live data from the ECM and noticed erratic readings and slow processor response. After installing one of our pre-programmed modules, the car ran like new. The stalling vanished, the check engine light stayed off, and the owner was thrilled to have their smooth, reliable car back. It’s a classic case of how a failing ECM can mimic a dozen other problems.
The Plug-and-Play Solution for Your Vehicle
Replacing an ECM used to mean a trip to the dealership for expensive parts and programming. We’ve eliminated that hassle. When you purchase this module, we flash it with the latest official GM software updates specifically matched to your vehicle’s VIN. This ensures that it communicates perfectly with your car’s existing systems right out of the box. This isn’t just a replacement part; it’s a complete, ready-to-install solution that restores your vehicle to its factory specifications.
Common Symptoms of a Failing Buick Lucerne ECM
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Engine stalling or shutting off while driving
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Hesitation or stumbling during acceleration
- ✔ Difficulty starting the engine or a no-start condition
- ✔ Transmission shifting problems or harsh shifts
Why This 2009-2011 Lucerne ECM is the Right Choice
This module, service number 12635902, is a versatile and reliable computer used across a wide range of General Motors vehicles. It is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, and others. By providing us with your VIN, you guarantee that you receive a module that is 100% compatible with your vehicle’s specific configuration, engine, and options. This precision programming is critical for modern vehicles and is the key to a successful, lasting repair.
Frequently Asked Questions
Do I need to program this ECM?
No. This module comes fully programmed to your vehicle’s specific VIN. Simply provide your VIN to us after purchase, and we will flash the unit with the latest GM software before shipping it to you. It arrives ready for installation.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. A PCM controls both the engine and the transmission, which is common in most modern vehicles like your Lucerne. This part functions as the PCM.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this part will resolve the issue. However, it’s important to ensure that other potential problems (like faulty sensors or wiring) have been ruled out. This module will correct any codes directly related to internal computer failure.
Is any special procedure needed after installation?
In many cases, the module is plug-and-play. However, some GM vehicles may require a simple security relearn procedure (often called a Passlock or anti-theft relearn) which can typically be done without special tools. A Crankshaft Variation (CASE) relearn may also be needed, which requires a scan tool.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program and ship your module until we receive this information.
Does this module fit vehicles other than the Buick Lucerne?
Yes, this is a widely used GM module. It fits many other vehicles, including the Chevy Malibu, Impala, Silverado 1500, Cobalt, HHR, Pontiac G6, and Saturn Aura, among others. The key is matching the service number and ensuring it is programmed for the correct vehicle.