Restore Peak Performance to Your Buick Lucerne
Is your 2009, 2010, or 2011 Buick Lucerne suffering from perplexing engine issues? Unexplained stalling, poor fuel economy, a persistent check engine light, or a complete no-start condition can often be traced back to a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, it can cause a cascade of problems that are frustrating and difficult to diagnose. This direct-fit Engine Control Module, service number 1263605, is the definitive solution to restore your vehicle’s reliability and drivability.
From the Diagnostic Bay
We had a 2010 DTS come into the shop with a classic intermittent no-start condition. The owner had replaced the battery, starter, and even the fuel pump, but the car would still randomly refuse to crank. Diagnostic codes were all over the place—U-codes for lost communication, P-codes for sensor circuits. After hours of chasing wires, we checked the 5-volt reference signal from the ECM and found it was dropping out when the module got warm. We installed a VIN-programmed ECM, performed the security relearn, and the car fired up instantly. It’s a reminder that the ECM is the brain, and when it has a headache, the whole car feels it. Getting a properly programmed module is the key to avoiding these diagnostic nightmares.
Is Your Vehicle Showing Signs of ECM Failure?
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following symptoms, a failing ECM could be the culprit. This part is designed to resolve these common issues and get you back on the road with confidence.
- ✔ Check Engine Light: An illuminated CEL with codes related to processor failure, sensor circuits (e.g., P0606), or communication errors.
- ✔ Engine Stalling: The engine may stall unexpectedly while driving or at idle for no apparent reason.
- ✔ No-Start Condition: The engine cranks but refuses to start, or there’s no crank at all, despite a good battery and starter.
- ✔ Poor Performance & Fuel Economy: Noticeable decrease in power, rough idling, hesitation during acceleration, and a sudden drop in MPG.
- ✔ Erratic Transmission Behavior: Harsh or delayed shifting, as the ECM plays a critical role in communicating with the Transmission Control Module (TCM).
- ✔ Intermittent Electrical Issues: Seemingly unrelated electrical problems can sometimes be traced back to a failing computer.
The Plug-and-Play Advantage: VIN-Programmed for Your Lucerne
Don’t settle for a generic, unprogrammed module that requires expensive dealer visits or specialized tools. We take the guesswork out of the equation. When you order this 2009-2011 Lucerne ECM, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then program the module with the latest, most stable software updates directly from GM. This ensures that the computer is perfectly matched to your car’s specific configuration, including its engine, transmission, and factory options. This crucial step guarantees optimal performance and prevents compatibility issues that can arise from using a blank or incorrectly programmed unit.
Wide-Ranging GM Compatibility
While this is the primary replacement for the 2009-2011 Buick Lucerne with the 4.6L engine, this versatile E38 ECM was used across a wide array of General Motors vehicles. This part, identified by service number 1263605, is directly interchangeable with the following part numbers:
12636659, 12639300, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512.
It is a confirmed fit for many models including the Cadillac DTS, STS, CTS, SRX, Chevrolet Colorado, Corvette, Trailblazer, GMC Canyon, Envoy, Hummer H3, and Saab 9-7x. Please verify the part number and consult the fitment list to ensure this is the correct module for your specific vehicle and engine option.
Replacing your failing engine computer is a critical repair. By choosing our VIN-programmed 2009-2011 Lucerne ECM, you are ensuring a seamless installation process and restoring the precise operational control your vehicle was designed to have. Eliminate the frustrating symptoms and drive with the peace of mind that comes from a reliable, correctly configured engine management system.
Frequently Asked Questions
Do I need to have this ECM programmed?
No, we handle the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for installation, loaded with the latest GM software specific to your car.
Where is the ECM located on my 2009-2011 Buick Lucerne?
On the Buick Lucerne with the 4.6L V8 engine, the Engine Control Module is typically located in the lower part of the air cleaner box assembly in the engine bay. Always disconnect the battery before attempting to access or replace it.
Will I need to perform any other procedures after installation?
In most cases, you will need to perform a security relearn procedure (often called a Passlock or anti-theft relearn). This procedure can typically be done without special tools and involves a sequence of key cycles. A crankshaft position sensor variation relearn may also be necessary, which requires a capable scan tool.
How do I provide my VIN?
You can add your 17-digit VIN to the notes section during the checkout process. If you forget, we will contact you via email to retrieve it. We cannot ship the module until we have your VIN to complete the programming.
Is this a new part?
This is a high-quality, tested, and verified used component. Each module is thoroughly inspected and then programmed with vehicle-specific software to ensure it functions to original equipment standards.