Restore Your Buick’s Performance and Reliability
Is your 2009-2011 Buick Lucerne experiencing frustrating issues like stalling, a persistent check engine light, or erratic engine behavior? The Engine Control Module (ECM), the vehicle’s central computer, is often the source of these problems. Over time, heat and vibration can degrade its internal components, leading to performance loss and diagnostic headaches. This replacement ECM is the definitive solution, arriving pre-programmed with the latest GM software updates specifically for your vehicle’s VIN. This eliminates the need for expensive dealership programming, allowing you to get your car back on the road quickly and confidently.
From the Diagnostic Bay
I remember a 2010 Lucerne 4.6L that came into my shop with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the spark plugs and an O2 sensor with no luck. After connecting my scan tool, I pulled a P0606 code (ECM Processor Fault). While this code can sometimes be a ghost, the intermittent nature of the problem pointed directly to the computer. Instead of a costly diagnostic path, we opted for a direct replacement. With a pre-programmed 2009-2011 Lucerne ECM, the swap took less than 30 minutes. The car started instantly, idled perfectly, and the code never returned. It’s a prime example of how the right part, properly prepared, can save hours of frustration and hundreds of dollars.
Is Your Lucerne Showing These Symptoms?
- ✔ Check Engine Light is on with codes like P0601, P0606, or other communication errors.
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ The engine stalls unexpectedly or runs rough.
- ✔ Unexplained transmission shifting problems.
- ✔ Intermittent electrical issues that seem to have no source.
A Straightforward Guide to Installation
Installing your new 2009-2011 Lucerne ECM is a manageable job for a DIY enthusiast. For the Lucerne, the ECM is conveniently located in the lower part of the air cleaner box, making it easily accessible.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Open the hood and find the engine air cleaner assembly. The ECM is typically housed within or attached to the bottom of this box.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old ECM. Press the release tabs firmly to avoid damaging them. Then, unbolt the module from its mounting bracket.
- Install the New ECM: Mount the new module securely in place of the old one. Reconnect the electrical connectors, ensuring they click firmly into place.
- Final Steps: Reassemble the air cleaner box if you disassembled it. Reconnect the negative battery terminal. The vehicle may need to complete a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes before starting.
Guaranteed Vehicle Compatibility
This Engine Control Module, part number 12625453, is a direct replacement for a wide range of GM vehicles. It is interchangeable with service numbers 12636659, 12639300, 1263605, 12628993, 12628911, 12622175, 12630464, and 12678512. Please verify your vehicle is on the list below:
- Buick Lucerne (4.6L): 2009-2011
- Cadillac CTS (6.2L): 2009
- Cadillac DTS: 2009-2011
- Cadillac SRX (4.6L): 2009
- Cadillac STS (4.4L, 4.6L): 2009-2010
- Cadillac XLR (ID 12636659, 12625453): 2009
- Chevrolet Colorado (2.9L, 3.7L): 2009-2012
- Chevrolet Corvette (ZR1): 2009
- Chevrolet Trailblazer (6.0L): 2009
- GMC Canyon (2.9L, 3.7L): 2009-2012
- GMC Envoy (5.3L): 2009
- Hummer H3 (3.7L): 2009-2010
- Saab 9-7x: 2009
Your VIN is Required for Programming
To ensure a perfect, plug-and-play experience, we require your vehicle’s 17-digit Vehicle Identification Number (VIN) at the time of purchase. Our technicians will use your VIN to flash this 2009-2011 Lucerne ECM with the most current, stable software from General Motors, matching it exactly to your car’s specific configuration. This critical step ensures all systems communicate correctly from the moment you install it.
Frequently Asked Questions
Do I need to get this computer programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide your VIN during checkout, and the module will arrive ready for installation.
Where is the ECM located on my 2010 Buick Lucerne?
On the 2009-2011 Buick Lucerne, the Engine Control Module is located inside the lower part of the engine’s air cleaner box assembly.
How do I provide my VIN?
You can add your 17-digit VIN in the notes section during checkout or send it to us in a message after you complete your purchase. We cannot ship your order until we receive the VIN.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes include P0601-P0606), this part is the correct fix. However, you should always diagnose the codes to ensure there isn’t another faulty sensor or component.
Is this part compatible with other part numbers?
Yes, this module is a direct replacement for several service numbers, including 12636659, 12639300, 12628993, and others listed in the full description.