Restore Your Buick’s Smooth Performance and Reliability
Are you dealing with frustrating and unpredictable engine problems? A persistent check engine light, rough idling, stalling, or a complete no-start condition can often point to a failing Engine Control Module (ECM). This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s performance and safety. Instead of facing the high costs and scheduling hassles of a dealership, you have a direct, reliable solution. This professionally programmed 2009-2011 Buick Lucerne ECM is the definitive answer to get your car back on the road, running exactly as it should.
Common Symptoms of a Failing ECM & Your Direct Solution
A faulty engine computer can cause a wide range of confusing issues. If you’re experiencing any of the following, a failing ECM is the likely culprit:
- Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U-series codes.
- Engine Stalling or Misfiring: The engine may cut out unexpectedly while driving or run erratically.
- No-Start Condition: The engine cranks but refuses to start, even with a good battery and fuel supply.
- Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s gas mileage.
- Failed Emissions Test: Inability of the onboard diagnostic system to complete its readiness monitors.
This unit is your direct-fit, plug-and-play solution. We take the guesswork out of the repair by pre-programming the module to your car’s specific Vehicle Identification Number (VIN) before it ships. This ensures all systems—from the engine and transmission to the anti-theft system—communicate perfectly from the moment you install it.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: Simply provide your VIN at checkout, and we’ll flash the module with the latest GM software updates for your exact vehicle. This eliminates the need for expensive dealer programming.
- ✔ True Plug-and-Play Installation: Once you receive the module, the installation is straightforward. No special tools or additional programming are required.
- ✔ Restores Original Performance: Get back the smooth acceleration, stable idle, and fuel efficiency you expect from your vehicle by restoring the brain of your engine management system.
- ✔ Broad Compatibility: This ECM, service number 12636659, is a direct replacement for a wide range of GM part numbers, including 12639300, 1263605, 12628993, and more, ensuring a perfect match.
- ✔ Cost-Effective Dealership Alternative: Save hundreds of dollars compared to the parts and labor costs associated with a dealership repair.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
“Many people don’t realize that a modern ECM is more than just a part; it’s the central hub of your vehicle’s entire electronic network. When we program this 2009-2011 Buick Lucerne ECM to your VIN, we’re not just loading software. We are digitally ‘marrying’ the computer to your car’s unique configuration, including its transmission type, security system, and specific options. This crucial step is what makes our solution truly plug-and-play and prevents the frustrating communication errors that can occur with improperly matched modules.”
Frequently Asked Questions
Where do I provide my VIN?
You can provide your vehicle’s 17-digit VIN in the notes section during checkout or by sending us a message after you place your order. We cannot ship your part until we receive the VIN, as the programming is essential.
Is any additional programming needed after installation?
No. This module is pre-programmed for your vehicle. In most cases, it is a simple plug-and-play installation. However, some vehicles may require a security relearn procedure, which is a simple process that can be done without any special tools. Instructions are readily available online for this procedure.
How do I know if this ECM will fit my vehicle?
This 2009-2011 Buick Lucerne ECM fits a wide variety of GM vehicles. Please check the detailed fitment list on this page and match your original part number to one of the interchangeable service numbers provided (e.g., 12636659, 12639300, etc.) to ensure compatibility.
What is the difference between an ECM, ECU, and PCM?
The terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) typically refer to the same part. PCM (Powertrain Control Module) is a module that controls both the engine and the transmission. For your vehicle, this part serves as the primary engine computer.
What if I have questions during installation?
We are committed to your success. If you have any questions or run into an issue, please contact our support team. Our experienced technicians are here to help guide you through the process.