Is Your Buick Lucerne Running Rough, Stalling, or Showing a Check Engine Light?
If your 2009, 2010, or 2011 Buick Lucerne is experiencing frustrating issues like erratic idling, poor fuel economy, a no-start condition, or a persistent check engine light that won’t go away, a failing Engine Control Module (ECM) is often the culprit. As the central computer for your vehicle’s engine, the ECM’s health is critical for performance and reliability. When it falters, it can create a cascade of problems that are difficult to diagnose. This isn’t just an inconvenience; it’s a core component failure that compromises your driving experience.
A Technician’s Real-World Experience
“A customer’s 2010 Lucerne came into my shop last month with a persistent P0304 code (Cylinder 4 Misfire). The owner had already replaced the spark plug, ignition coil, and fuel injector on that cylinder, but the misfire and check engine light kept returning. After confirming the new parts were good, I used a scope to check the signal from the ECM to the #4 injector. There was none. The injector driver circuit inside the original ECM had failedโa common issue I’ve seen on dozens of these GM platforms. We installed one of our pre-programmed modules, and the car ran perfectly immediately. It’s a classic case where the problem isn’t the components, but the computer controlling them.”
The Direct Solution: A VIN-Programmed ECM Ready for Installation
This is a genuine GM Engine Control Module, service number 12622175, that arrives at your door fully programmed to your specific vehicle. We eliminate the most significant hurdle of ECM replacement: the need for expensive dealership programming. Simply provide us with your vehicle’s 17-digit VIN during checkout, and our experts will flash the module with the latest, most stable software updates from General Motors. This ensures optimal performance and communication with all other modules in your Lucerne.
- โ VIN Programmed for You: We handle the complex programming. It arrives ready to be installed, saving you hundreds in dealer fees.
- โ Latest GM Software: Your module is loaded with the newest updates to correct factory bugs and improve engine efficiency and performance.
- โ Restores Engine Performance: A direct solution for common symptoms like stalling, hard starting, poor acceleration, and incorrect shifting.
- โ Clears Fault Codes: Corrects persistent diagnostic trouble codes (DTCs) related to sensor inputs, injector circuits, and processor failures.
- โ Broad Compatibility: This module is a direct replacement for a wide range of GM vehicles, ensuring a perfect fit and function.
Plug-and-Play Installation: No Dealer Visit Required
Replacing the 2009-2011 Lucerne Engine Control Module is a straightforward job for a DIYer with basic tools. On the 4.6L Lucerne, the ECM is conveniently located in the lower part of the air cleaner box assembly.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10 minutes for the system to fully discharge.
- Locate the ECM: Open the hood and find the air cleaner box on the driver’s side of the engine bay. The ECM is situated at the bottom of this housing.
- Access the Module: You will likely need to unclip and remove the top of the air cleaner housing and the air filter to gain clear access to the ECM.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Never pull on the wires themselves. Inspect the connectors for any signs of corrosion or bent pins.
- Remove Old ECM: Unbolt the old module from its mounting bracket.
- Install New ECM: Mount the new, pre-programmed ECM in place, ensuring it is secure. Reconnect the wiring harnesses until they click firmly into place.
- Reassemble: Reinstall the air filter and air cleaner box cover. Reconnect the negative battery terminal.
- Final Step: The vehicle may require a security relearn procedure, which can typically be done by turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and enjoy restored performance.
Guaranteed Fitment & Interchangeability
This ECM, part number 12622175, is a direct replacement for several other GM service numbers. If your original module has any of the following numbers, this part is a 100% compatible replacement:
Interchangeable Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12630464, 12678512
While this listing is focused on the 2009-2011 Lucerne Engine Control Module, this part also fits a wide variety of other GM models, including select years of the Cadillac CTS, DTS, STS, SRX, XLR; Chevrolet Colorado, Corvette, Trailblazer; GMC Canyon, Envoy; Hummer H3; and Saab 9-7X. Please verify the part number on your original module to ensure perfect compatibility.