Restore Peak Performance to Your Vehicle
Is your Buick Lucerne, Chevy Silverado, or Malibu suffering from frustrating and unpredictable engine problems? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit behind issues like a persistent check engine light, poor fuel economy, stalling, or rough shifting. This replacement PCM, service number 12597125, is the definitive solution to restore your vehicle’s reliability and drivability. It arrives at your door fully programmed with the latest GM software, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This eliminates the need for expensive dealership programming, saving you time and money.
Is Your GM Vehicle Showing Signs of a Faulty PCM?
A failing engine computer can manifest in numerous ways, often mimicking other mechanical problems. Before you start replacing sensors and other components, check if your vehicle is exhibiting these classic symptoms of PCM failure:
- ✔ Persistent Check Engine Light (CEL), especially with communication-related trouble codes (e.g., U-codes).
- ✔ Unexplained engine stalling, hesitation, or difficulty starting.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Rough or erratic automatic transmission shifting.
- ✔ Intermittent loss of power or engine misfires.
- ✔ Inaccurate or non-functional dashboard gauges.
- ✔ Failure to pass state emissions inspections.
The Premier Solution: A VIN-Programmed 2009-2011 Lucerne PCM
Don’t settle for a generic, unprogrammed module that requires additional, costly trips to a mechanic or dealer. We take the guesswork out of the repair. When you order, you provide us with your vehicle’s VIN. Our technicians then use that information to flash this high-quality PCM with the most current, stable software directly from General Motors. This ensures that all factory parameters for your specific engine, transmission, and emissions equipment are perfectly loaded, guaranteeing seamless integration and optimal performance right out of the box. This module is a direct replacement for multiple service numbers, including 12612397, DL 216140, 12594750, 12629019, 12635902, and 12611549, making it a versatile and reliable choice for a wide range of GM cars and trucks.
Expert Pro Tip
After installing your new PCM, a security relearn procedure (often called a CASE learn or Passlock relearn) is typically required. This syncs the new computer with your vehicle’s anti-theft system and crankshaft position sensor. In many GM vehicles, this can be done without a specialized scan tool by following a specific key-cycling procedure. Check your service manual or reliable online automotive forums for the exact steps for your model to complete the installation like a pro.
Effortless Installation Process
While professional installation is always an option, many DIY mechanics can successfully replace a PCM. The process generally involves these steps:
- Disconnect the Battery: Always disconnect the negative battery terminal first to prevent electrical shorts.
- Locate the Old PCM: On the 2009-2011 Buick Lucerne, the PCM is conveniently located in the lower part of the air cleaner box. In other models like the Silverado or Cobalt, it’s typically found in the engine bay, often on the driver’s side.
- Swap the Modules: Carefully unplug the wiring harnesses and unbolt the old module. Secure the new, pre-programmed PCM in its place and reconnect the harnesses, ensuring they click securely into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn: Follow the specific key-on/key-off procedure for your vehicle to sync the new computer. This final step is crucial for the engine to start and run correctly.
Frequently Asked Questions
Do I need to do any programming myself?
No. This PCM comes fully programmed to your vehicle’s VIN with the latest GM updates before it is shipped. The only post-installation step you may need to perform is a security relearn procedure, which does not require a computer.
What information do you need from me?
After you place your order, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. You can typically find this on your driver’s side dashboard (visible through the windshield), on the driver’s door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a simple plug-and-play installation?
It is very close to plug-and-play. The module is pre-programmed for your vehicle, so it will plug in directly. However, nearly all installations will require a security relearn procedure to allow the vehicle to start. This procedure syncs the new PCM with your vehicle’s anti-theft system.
How do I know for sure that my PCM is the problem?
While the symptoms listed above are strong indicators, a definitive diagnosis is key. We recommend having a qualified technician test the PCM and check for communication errors (U-codes) with a professional scan tool. This ensures you are replacing the correct part and not masking another issue.
Will this computer fit models other than the Buick Lucerne?
Yes, absolutely. This specific PCM is compatible with a wide variety of GM vehicles from roughly 2007-2012, including the Chevy Silverado 1500, Malibu, Cobalt, HHR, Impala; GMC Sierra 1500; Pontiac G5, G6, Solstice; and Saturn Aura, Sky, and Vue. Please refer to the detailed fitment list to confirm compatibility with your exact year, make, and model.