Restore Your Buick’s Smooth, Reliable Performance
Is your Buick Lucerne suffering from a persistent check engine light, erratic performance, or a frustrating no-start condition? These issues often point directly to a failing Engine Control Module (ECM), the central computer of your vehicle. Don’t let a complex electronic problem keep you off the road. This direct-fit ECM is the definitive solution, arriving at your door fully programmed to your specific vehicle’s VIN for a straightforward installation.
Common Symptoms & Your Direct-Fit Solution
A faulty ECM can cause a cascade of confusing problems. If you’re experiencing any of the following, this part is designed to be your solution:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606
- Poor or declining fuel economy
- Engine stalling, stumbling, or misfiring
- Complete no-start or intermittent starting issues
- Transmission shifting problems
- Failure to communicate with diagnostic scan tools
By replacing your old unit with this professionally programmed 2009-2011 Lucerne Engine Control Module, you are not just swapping a part; you are restoring the core logic that governs your engine’s performance, efficiency, and reliability.
Features & Benefits
- โ VIN-Programmed for Your Vehicle: This isn’t a generic, one-size-fits-all unit. We flash it with the latest GM software updates using your car’s unique VIN, ensuring it works perfectly right out of the box.
- โ Plug-and-Play Installation: Because the programming is done for you, installation is simple. No expensive trips to the dealership for coding are required.
- โ Restores Original Performance: Eliminate the frustrating symptoms of a bad ECM and get back the smooth power delivery and efficiency you expect from your Buick.
- โ Guaranteed Compatibility: This module is a direct replacement for a wide range of original service numbers, including 12636659, 12639300, 12628993, and more.
- โ One-Year Warranty: This unit is backed by our one-year replacement warranty for your complete peace of mind.
An Expert’s Note on Diagnostics
“Over my 20 years in diagnostics, I’ve seen countless vehicle owners spend hundreds, sometimes thousands, of dollars chasing ghosts. They replace sensors, fuel pumps, and even transmission components, only to find the root cause was a failing ECM all along. A bad module can send incorrect signals, making other perfectly good parts seem faulty. Investing in a properly programmed 2009-2011 Lucerne Engine Control Module is often the most direct and cost-effective path to a final repair, saving you time, money, and immense frustration.”
This is the ideal solution for any owner of a 2009, 2010, or 2011 Buick Lucerne with the 4.6L engine. While this listing focuses on the Lucerne, this versatile 2009-2011 Lucerne Engine Control Module also fits an extensive list of other GM vehicles, from the Cadillac DTS to the Chevy Colorado. Please verify the provided fitment list to ensure it’s the right part for your car or truck.
Frequently Asked Questions
Do I need to do any programming or flashing myself?
Absolutely not. The main benefit of our service is that we handle all the programming for you. The module will arrive flashed with the latest GM updates and coded specifically to the VIN you provide, making it ready for installation.
Where do I provide my vehicle’s VIN?
You can provide your 17-digit VIN in the notes section during checkout. If you forget, you can also send it to us in a message after your purchase. Please note we cannot ship your part until we receive the VIN.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty ECM, then yes, this part will resolve the issue. It’s crucial to have a proper diagnosis to confirm the ECM is the point of failure before ordering.
Is this the correct part for my vehicle?
This ECM, service number 12622175, is interchangeable with several other part numbers listed in the description. Please review the comprehensive fitment list provided to confirm it matches your specific year, make, model, and engine size.
What tools are required for installation?
Installation typically requires basic hand tools like a socket set and screwdrivers. The most important step is to disconnect the vehicle’s battery before you begin to prevent any electrical damage. The module is usually located in the engine bay, often near the air cleaner box.