Is Your Buick Lucerne Running Rough? The PCM Might Be the Culprit.
If your 2009, 2010, or 2011 Buick Lucerne is suffering from a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition, a failing Powertrain Control Module (PCM) is a very likely cause. The PCM is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it fails, the symptoms can be widespread and frustrating. This replacement PCM, service number 12612397, is the definitive solution to restore your vehicle’s factory performance and reliability.
We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store, this unit is professionally programmed specifically for your vehicle using your unique Vehicle Identification Number (VIN). This ensures that all factory settings, security information, and engine parameters are a perfect match for your Lucerne, making installation as simple as possible. Just provide us with your VIN after purchase, and we’ll handle the complex programming before the part ever leaves our facility.
From the Diagnostic Bay
We had a 2010 Lucerne 3.9L come into the shop with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The customer had already replaced the spark plugs and an O2 sensor with no luck. Our scan tool showed a loss of communication with multiple sensors, but the wiring checked out fine. This pointed us directly to the PCM. After installing a VIN-programmed module like this one, we performed the security relearn procedure, and the car ran perfectly. The intermittent electrical gremlins were gone, and the customer was thrilled to have their reliable car back. It’s a classic case where a solid diagnostic process leads to the correct, central component.
Common Symptoms of a Failing 2009-2011 Lucerne PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Unexplained drop in fuel mileage.
- ✔ Rough or unstable engine idle.
- ✔ Engine stalling or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
A True Plug-and-Play Solution
This module is a direct replacement for several GM service numbers, including 12612397, 12597125, 12594750, 12629019, 12635902, and 12611549. Its compatibility extends beyond the Lucerne to a wide range of GM vehicles, such as the Chevrolet Silverado, Malibu, Cobalt, HHR, Impala, GMC Sierra, Pontiac G6, Saturn Aura, and more. Our VIN-specific programming ensures that it functions flawlessly in your specific application. Once installed, you will likely need to perform a simple security relearn procedure, which can typically be done in your driveway without any special tools. This procedure syncs the new PCM with your vehicle’s anti-theft system.
Don’t let a faulty computer keep your car off the road. By choosing a pre-programmed 2009-2011 Lucerne PCM, you are getting a reliable, cost-effective part that is ready for installation right out of the box. Restore the smooth operation and efficiency you expect from your vehicle.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipping. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your car. This makes the installation process much simpler.
Where is the PCM located on my 2010 Buick Lucerne?
On the 2009-2011 Buick Lucerne, the PCM is typically located in the lower part of the air cleaner box assembly in the engine bay. It’s a relatively accessible location for replacement.
What is a security relearn procedure?
After installing the new PCM, you may need to perform a security relearn to sync the module with your car’s anti-theft system and keys. The standard GM procedure involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Your vehicle’s service manual will have the exact steps.
Will this computer fit other vehicles?
Yes, this PCM is compatible with a wide array of GM vehicles from roughly 2007-2012, including models like the Chevy Malibu, Cobalt, HHR, Silverado 1500, GMC Sierra 1500, Pontiac G6, and Saturn Vue. The key is that we program it specifically for the VIN you provide.
What service numbers does this part replace?
This module is a direct replacement for multiple service numbers, including 12612397, 12597125, DL216140, 12594750, 12629019, 12635902, and 12611549.