Is Your Buick Lucerne Running Rough? The ECM Might Be the Culprit.
If your 2009, 2010, or 2011 Buick Lucerne is suffering from mysterious issues like a persistent check engine light, poor fuel economy, stalling, or transmission shifting problems, the root cause is often a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, managing everything from fuel injection and ignition timing to emissions controls and transmission function. When it starts to fail, it can create a cascade of frustrating and difficult-to-diagnose problems. Don’t let a faulty computer keep your car off the road. This direct-replacement ECM is the reliable, cost-effective solution you need.
From the Diagnostic Bay
We had a 2010 Buick Lucerne come into the shop with a complaint of intermittent stalling and a check engine light that multiple other shops couldn’t solve. They had replaced the spark plugs, ignition coils, and even the fuel pump, but the problem persisted. After hooking up our professional scan tool, we noticed erratic data from several key engine sensors. Instead of chasing ghosts by replacing more parts, we focused on the central hub: the ECM. A quick check confirmed internal circuit failure. After installing one of our pre-programmed ECMs, the car ran perfectly. The customer was thrilled to finally have a reliable vehicle again after months of headaches. It’s a classic case of treating the disease, not just the symptoms.
Common Symptoms of a Failing GM ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
The Plug-and-Play Solution: A Pre-Programmed 2009-2011 Lucerne ECM
Replacing an ECM isn’t as simple as swapping the part. Modern vehicle computers are coded specifically to the car they are installed in. This unit takes all the guesswork and expensive dealership programming out of the equation. When you purchase this 2009-2011 Lucerne ECM, we flash it with the latest, most up-to-date GM factory software using your vehicle’s unique Vehicle Identification Number (VIN). This ensures that the module is a perfect match for your car’s specific configuration, options, and emissions standards. The result is a true plug-and-play installation that restores your vehicle’s performance and reliability right out of the box.
Simple Ordering Process:
- ✔ Place Your Order: Add this ECM to your cart and complete the checkout process.
- ✔ Provide Your VIN: After your purchase, simply send us your 17-digit VIN. We cannot ship the part without it.
Wide-Ranging GM Compatibility
While this is a perfect fit for the 2009-2011 Buick Lucerne with the 3.9L engine, this versatile E38 ECM was used across a vast number of General Motors vehicles. This part, service number 12638026, is a direct replacement for several other service numbers including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549. It fits models such as:
- Chevrolet Silverado & GMC Sierra (4.3L)
- Chevrolet Malibu (2.2L, 2.4L, 3.5L)
- Chevrolet Cobalt & Pontiac G5 (2.2L, 2.4L)
- Chevrolet HHR (2.2L, 2.4L)
- Chevrolet Impala
- Saturn Aura & Vue (2.4L)
- Pontiac G6 (2.4L)
- Pontiac Solstice & Saturn Sky (2.4L)
- And many more. Please verify the part number to ensure proper fitment for your specific application.
Frequently Asked Questions
Is this ECM ready to install when I receive it?
Yes! We program the module using your VIN before shipping. This means it is ready for installation right out of the box. In most cases, you will only need to perform a simple security relearn procedure, which can be done without any special tools and takes about 30 minutes. Instructions are readily available online.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
What if I install it and my problem doesn’t go away?
While this ECM will fix issues related to a faulty computer, it’s important to ensure your vehicle has been properly diagnosed. This part will not fix underlying mechanical or electrical issues, such as a bad sensor or wiring harness. We recommend a thorough diagnosis by a qualified technician.
Is this a new or used part?
This is a high-quality, tested, and verified OEM replacement part. Each unit undergoes a rigorous inspection and programming process to ensure it meets or exceeds original factory specifications for performance and longevity.
Do I need to send my old ECM back?
There is no core charge or requirement to return your old, faulty module. You can keep it or dispose of it as you see fit.