End Engine Troubles and Get Back on the Road with Confidence
Is your Buick or Pontiac suffering from a persistent check engine light, rough idling, stalling, or a frustrating no-start condition? These are common signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep you sidelined. This professionally programmed PCM is the direct, reliable solution to restore your vehicle’s performance, fuel economy, and dependability, getting you back to a smooth, worry-free drive.
Common Symptoms & Your Direct Solution
A failing PCM can cause a wide range of confusing and intermittent issues. If you’re experiencing any of the following, this module is the likely fix you need:
- Erratic engine performance, stumbling, or hesitation
- Sudden stalling or difficulty starting the engine
- Poor fuel mileage and failed emissions tests
- Check Engine Light with communication error codes (like P0601, P0605, P0606)
- Transmission shifting problems or harsh engagement
- Inaccurate readings from gauges or other electronic systems
This isn’t just a replacement part; it’s a complete solution. We program this Buick Lucerne 3.8L PCM 12509307 specifically to your vehicle’s unique Vehicle Identification Number (VIN) before it ships. This critical step ensures all systems, from the engine and transmission to the anti-theft security, function exactly as they did from the factory.
Features & Tangible Benefits
- ✔ Programmed to Your VIN: We flash the module with the latest GM software updates using your specific VIN. This guarantees a true plug-and-play installation without needing an expensive trip to the dealership.
- ✔ Restored Engine Performance: By correcting faulty signals and logic, this PCM restores crisp throttle response, smooth idling, and proper fuel delivery for optimal power and efficiency.
- ✔ Direct-Fit OEM Design: Engineered to be an exact match for the original part, it installs perfectly in the factory location (in the lower part of the air cleaner box) using the original connectors. No modifications needed.
- ✔ Cost-Effective Solution: Avoid the high costs and programming fees associated with a brand-new module from a dealer. This provides the same reliable function at a fraction of the price.
- ✔ Peace of Mind Warranty: This unit is backed by our one-year replacement warranty. Drive with confidence knowing your purchase is protected.
A Technician’s Tip: Why VIN Programming is Non-Negotiable
As a technician, I’ve seen countless drivers try to save a few dollars by installing a used, non-programmed PCM from a junkyard. It almost never works. Modern GM vehicles use a sophisticated anti-theft system (VATS/PassKey) that is tied directly to the original PCM and VIN. Installing a module from another car will result in a no-start condition that cannot be bypassed without specialized tools. Our VIN programming service correctly syncs this Buick Lucerne 3.8L PCM 12509307 to your car’s security system, transmission type, and specific options, ensuring it works correctly right out of the box after a simple security relearn procedure.
Frequently Asked Questions
Do I need to program this module when I receive it?
No. We pre-program the module to the VIN you provide, so it is ready to install. You will only need to perform a simple security relearn procedure, which does not require any special tools and can be done in your driveway.
What is the security relearn procedure?
While procedures can vary slightly, the most common method is the “10-Minute Relearn.” Simply turn the key to the “ON” position (without starting the engine) for 10 minutes, then turn it off for 10 seconds. Repeat this process two more times for a total of 3 cycles. On the fourth attempt, the vehicle should start and run normally.
Where is this PCM located on my vehicle?
For the models listed, the PCM is typically found inside the lower part of the engine’s air cleaner box/housing. This protects it from engine heat and moisture.
How do I provide my VIN?
After you complete your purchase, you can add your 17-digit VIN to the order notes or reply to your order confirmation email. We cannot ship your part until we receive the VIN for programming.
Will this fit my car if it’s not a Buick Lucerne?
Yes, this Buick Lucerne 3.8L PCM 12509307 is also the correct module for the 2006-2009 Buick LaCrosse/Allure and the 2006-2008 Pontiac Grand Prix, as long as your vehicle is equipped with the 3.8L engine.
Is a faulty PCM the only cause for these symptoms?
While the PCM is a very common point of failure for these issues, we always recommend a thorough diagnosis by a qualified mechanic. However, if you have diagnosed the PCM as the problem, this pre-programmed unit is the most reliable and efficient solution available.