Restore Peak Performance to Your GM 3.8L Vehicle
Is your Buick LaCrosse, Lucerne, Allure, or Pontiac Grand Prix suffering from frustrating and unpredictable issues? An erratic check engine light, poor fuel economy, rough idling, or even a no-start condition can often be traced back to a failing Powertrain Control Module (PCM). This component is the brain of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it fails, the symptoms can be widespread and difficult to diagnose. This replacement PCM, part number 12509307, is the definitive solution to restore your vehicle’s reliability and drivability.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0606, or other communication errors.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Rough or unstable engine idle.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, misfiring, or hesitation during acceleration.
- ✔ The vehicle cranks but refuses to start.
- ✔ Failure to pass state emissions testing.
Your Direct-Fit 2006-2009 LaCrosse PCM Solution
Don’t let a faulty computer keep your car off the road. This PCM is a direct-fit replacement for a range of GM vehicles equipped with the venerable 3.8L V6 engine. The most significant advantage is our professional programming service. Before we ship the part, we flash it with the latest official GM software calibrated specifically to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures seamless integration and optimal performance, eliminating the need for an expensive trip to the dealership for programming. It arrives at your door ready for installation.
Guaranteed Fitment For:
- ✔ Buick LaCrosse: 2006-2009 (with 3.8L engine)
- ✔ Buick Allure: 2006-2009 (with 3.8L engine)
- ✔ Buick Lucerne: 2006-2008 (with 3.8L engine)
- ✔ Pontiac Grand Prix: 2006-2008 (with 3.8L engine)
This module is a direct replacement for part numbers: 12600930, 12616866, 12619810, and 12509307. By purchasing this pre-programmed 2006-2009 LaCrosse PCM, you are getting a reliable, cost-effective fix that restores your vehicle to its factory operating standards.
Frequently Asked Questions
Do I need to program this PCM after I receive it?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the correct, updated software from GM.
Where is the PCM located on my vehicle?
On these specific GM 3.8L models, the Electronic Control Module (PCM) is conveniently located in the lower part of the air cleaner box or housing in the engine bay.
What is a VIN and why is it so important?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. It contains specific information about your vehicle’s make, model, engine, and factory options. We use it to load the exact software your car needs to run properly.
Will I need to perform any other procedures after installation?
In many cases, you may need to perform a security relearn procedure, also known as a VATS relearn, which can typically be done without special tools. A Crankshaft Variation Relearn (CASE relearn) might also be necessary and requires a compatible scan tool to complete.
How do I know if this is the right part for my car?
Please check the fitment list provided. This part is for the 2006-2009 LaCrosse & Allure, 2006-2008 Lucerne, and 2006-2008 Grand Prix, all equipped with the 3.8L engine. Matching your original part number to 12509307 or its alternates will also confirm compatibility.