Programmed 2009-2011 Lucerne Engine Control Module 12630464

Restore Peak Performance to Your Buick Lucerne with a VIN-Programmed ECM

If you’re dealing with frustrating and unpredictable issues like stalling, a persistent check engine light, or a car that just won’t start, the root cause is often the vehicle’s brain: the Engine Control Module (ECM). For 2009-2011 Lucerne Engine Control Module failures, finding a reliable and straightforward fix is critical. This isn’t just a part; it’s a comprehensive solution designed to get your vehicle running smoothly again without the hassle and expense of a dealership visit.

As a technician with over two decades of experience, I’ve seen countless drivers spend a fortune chasing down electrical gremlins. A faulty ECM can mimic a dozen other problems, from bad sensors to fuel pump issues. This direct-fit replacement ECM, part number 12630464, eliminates the guesswork. The most significant benefit we offer is the professional VIN-programming service. Before we ship the module, we flash it with the latest factory software from GM, tailored specifically to your car’s VIN. This ensures all systems communicate correctly, restoring fuel efficiency, ignition timing, and transmission shifting to factory specifications.

Common Signs of a Failing Engine Computer

• ✔ Check Engine Light is illuminated, often with internal processor codes like P0601, P0602, or P0606.
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained drops in fuel economy and poor engine performance.
• ✔ Intermittent stalling or a rough, unstable idle.
• ✔ Transmission shifting problems or harsh engagement.
• ✔ Communication errors with diagnostic scan tools.

A Straightforward Guide to Your ECM Installation

Installing your new 2009-2011 Lucerne Engine Control Module is a manageable job for a DIYer with basic tools. On the Lucerne 4.6L, the ECM is conveniently located at the lower part of the air cleaner box.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes for the system to discharge.
2. Locate the Module: Find the ECM, which is mounted to the bottom of the air filter housing assembly in the engine bay.
3. Disconnect Connectors: Carefully release the locking tabs and unplug the main electrical harnesses from the old ECM. Inspect the connectors for any corrosion or damage.
4. Remove the Old ECM: Unbolt the module from its mounting bracket.
5. Install the New ECM: Mount your new, pre-programmed module in place, ensuring it is secure.
6. Reconnect Everything: Plug the electrical harnesses firmly into the new ECM until they click. Reconnect the negative battery terminal.
7. Security Relearn (If Necessary): In some cases, a simple security relearn procedure may be required. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. We include instructions if this step is needed for your vehicle.

Verified Vehicle Compatibility List

This module is a direct replacement for part number 12630464 and is interchangeable with service numbers 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, and 12678512. It fits a wide range of GM vehicles, including:

• ✔ Buick Lucerne 2009-2011: Electronic Control Module; (lower part of air cleaner box), 4.6L
• ✔ Cadillac CTS 2009: Electronic Control Module; (RH front engine compartment), 6.2L
• ✔ Cadillac DTS 2009-2011: Electronic Control Module
• ✔ Cadillac SRX 2009: Electronic Control Module; (LH engine compartment), (4.6L)
• ✔ Cadillac STS 2009-2010: Electronic Control Module; (LH frame rail), 4.4L or 4.6L
• ✔ Cadillac XLR 2009: Electronic Control Module; (RH front engine compartment)
• ✔ Chevrolet Colorado / GMC Canyon 2009-2012: Electronic Control Module; (RH firewall)
• ✔ Chevrolet Corvette 2009: Electronic Control Module; (RH engine compartment), ZR1
• ✔ Chevrolet Trailblazer / GMC Envoy 2009: Electronic Control Module; (LH engine)
• ✔ Hummer H3 2009-2010: Electronic Control Module; (RH firewall)
• ✔ Saab 9-7X 2009: Electronic Control Module; (LH engine)

By purchasing this 2009-2011 Lucerne Engine Control Module, you’re not just buying a part—you’re getting a fully prepared, plug-and-play solution that brings your vehicle’s reliability and performance back to where it should be.