Is Your Buick Lucerne Experiencing Engine Problems?
If your 2009, 2010, or 2011 Buick Lucerne is suffering from erratic behavior like stalling, poor fuel economy, a persistent Check Engine Light, or even a no-start condition, the root cause could be a failing Engine Control Module (ECM). As the central computer of your vehicle, the ECM is responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it begins to fail, it can create a cascade of frustrating and difficult-to-diagnose issues. Don’t let a faulty computer keep your car off the road. This direct-fit replacement ECM is the reliable solution to restore your vehicle’s performance and dependability.
Expert Pro Tip
Expert Pro Tip
Before replacing your ECM, it’s crucial to perform a thorough diagnosis. Check the vehicle’s battery, charging system, and all main power and ground connections to the module. A simple wiring issue or a faulty sensor can often mimic the symptoms of a bad ECM. Use a quality scan tool to check for communication errors (U-codes) which are a strong indicator of a module-level failure. Confirming the diagnosis beforehand can save you time and money.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Poor acceleration and overall sluggish performance.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Loss of communication with diagnostic scan tools.
- ✔ Cooling fans running constantly or not at all.
Why Choose Our 2009-2011 Lucerne Engine Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle when replacing a modern ECM is the need for specialized programming. We eliminate that step for you. When you place your order, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then flash the module with the latest, most up-to-date software directly from General Motors, ensuring it is perfectly matched to your vehicle’s specific configuration and options. This VIN-specific programming guarantees seamless integration and proper function of all engine and vehicle systems right out of the box.
Plug-and-Play Installation
Because we handle the programming, installation is straightforward. Simply disconnect the battery, locate and remove your old module (on the Lucerne 4.6L, it’s typically found on the lower part of the air cleaner box), and install this one in its place. Reconnect the electrical connectors and your battery, and you’re ready to go. In most cases, no complicated security relearn procedures are necessary, getting you back on the road faster.
Broad GM Compatibility
While this is the perfect solution for your 2009-2011 Lucerne Engine Control Module, this unit is also a direct replacement for a wide range of other GM vehicles. It is interchangeable with multiple service numbers, including 12636659, 12639300, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512. This part fits models such as the Cadillac DTS, STS, CTS, and SRX; Chevrolet Colorado, Trailblazer, and Corvette; GMC Canyon and Envoy; Hummer H3; and Saab 9-7X. This wide application is a testament to its proven reliability and design across the GM platform.
Frequently Asked Questions
Expert Pro Tip
Before replacing your ECM, it’s crucial to perform a thorough diagnosis. Check the vehicle’s battery, charging system, and all main power and ground connections to the module. A simple wiring issue or a faulty sensor can often mimic the symptoms of a bad ECM. Use a quality scan tool to check for communication errors (U-codes) which are a strong indicator of a module-level failure. Confirming the diagnosis beforehand can save you time and money.