Restore Peak Performance to Your Buick Lucerne
Is your 2009-2011 Buick Lucerne suffering from frustrating drivability issues? A faulty Engine Control Module (ECM) is often the culprit behind problems like poor fuel economy, stalling, a persistent check engine light, or a no-start condition. This vital component is the brain of your vehicle’s engine, controlling everything from fuel mixture and ignition timing to emissions systems. When it fails, the symptoms can be unpredictable and concerning. This replacement Engine Control Module, part number 12622175, is the definitive solution to get your vehicle back on the road and running like new.
We take the guesswork and hassle out of the repair. Unlike a generic module from a parts store or salvage yard, this unit is professionally programmed specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and our technicians will flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2010 Lucerne with the 4.6L V8 come into the shop with a classic ‘ghost’ problem. The owner had already replaced the throttle body and two oxygen sensors trying to chase down an intermittent stalling issue and a P0171 (System Too Lean) code. The car would run fine for days, then suddenly die at a stoplight. After hooking up our diagnostic scanner and monitoring live data, we noticed the short-term fuel trim values were erratically jumping all over the place with no corresponding sensor input to justify it. This pointed directly to a processing error within the ECM. We installed one of our VIN-programmed modules, performed the security relearn, and the car ran perfectly. The customer saved hundreds by avoiding further incorrect parts replacement.
Symptoms of a Failing 2009-2011 Lucerne Engine Module
If you’re experiencing any of the following issues, a failing ECM could be the cause. Replacing it can restore your vehicle’s reliability and performance.
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Transmission shifting problems or harsh shifts.
- ✔ Failure to pass state emissions testing.
Guaranteed Compatibility and Simple Installation
This module is a direct-fit replacement for your original unit, designed to meet or exceed OEM specifications. While this is the primary part for the 2009-2011 Lucerne Engine Module with the 4.6L engine, it is also a verified replacement for a wide range of other GM vehicles and part numbers. Installation is straightforward for a DIY mechanic with basic tools. The module is typically located in the lower part of the air cleaner box. After physical installation, a simple security relearn procedure may be required, which can often be done without special tools. Instructions for this procedure are widely available online or in your vehicle’s service manual.
Interchangeable Part Numbers:
This ECM is a direct replacement for the following GM service numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512. Please verify your part number or consult the extensive fitment list to ensure this is the correct part for your specific vehicle.
Is this part truly ‘plug and play’?
Yes, for the most part. Because we program the module to your car’s specific VIN, it will have the correct software for your engine, transmission, and options. However, on most GM vehicles, you will need to perform a security relearn procedure (also known as a VATS relearn) to sync the new ECM with your vehicle’s anti-theft system. This procedure typically takes about 30 minutes and does not require any special tools.
How do I provide my VIN number?
Please enter your 17-digit VIN in the notes section during the checkout process. You can find your VIN on your vehicle’s registration, insurance card, or on the driver’s side dashboard viewable through the windshield.
Do I need to send my old computer back?
No, there is no core charge or need to return your old module. This is a direct purchase of a replacement part.
My original part number is not on the list, but my vehicle is. Will this work?
If your vehicle make, model, year, and engine match the fitment data, this module is likely the correct one. GM often supersedes part numbers over time. The list provided contains the most common service numbers this module replaces. If you are unsure, please contact us with your VIN, and we can verify compatibility for you.
What if I install it and my problem isn’t fixed?
While a faulty ECM is a common issue, proper vehicle diagnostics are key. This part is guaranteed to be a functioning, correctly programmed module. If your issue persists after installation and a successful security relearn, the problem may lie with another component in the vehicle, such as wiring, sensors, or fuel delivery.