Is your Pontiac Grand Prix, Buick LaCrosse, or Lucerne suffering from perplexing engine issues?
If you’re dealing with a persistent Check Engine Light, unpredictable stalling, rough idling, or a no-start condition, the root cause is often a failing Powertrain Control Module (PCM). As the central computer for your vehicle’s engine and transmission, a faulty PCM can create a cascade of problems that are difficult to diagnose. This VIN-programmed PCM, part number 12619810, is the definitive solution to restore your vehicle’s performance, reliability, and drivability.
We take the guesswork out of the repair. Unlike sourcing a module from a salvage yard that requires expensive dealer programming, this unit arrives at your door ready for installation. Simply provide your vehicle’s 17-digit VIN during checkout, and our technicians will flash the module with the latest official GM software specific to your car. This ensures perfect compatibility with all your vehicle’s systems and options, right out of the box.
From the Diagnostic Bay
We had a 2007 Buick LaCrosse with the 3.8L V6 come in with a complaint of intermittent stalling at stoplights and a random P0606 (PCM Processor Fault) code. The owner had already replaced the crankshaft sensor and spark plugs with no success. After verifying power and grounds to the module were solid, we hooked up a scope and saw the injector driver signal was dropping out intermittently. This pointed directly to an internal failure in the PCM. Instead of a lengthy and costly trip to the dealer, we installed a VIN-programmed module just like this one. The car started immediately, the codes were gone, and the stalling issue was completely resolved. Getting a pre-programmed unit saved the customer hundreds in diagnostic and programming fees.
Common Symptoms of a Failing 2006-2008 Grand Prix PCM
- ✔ Unexplained Check Engine Light that may come and go.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic engine idling.
- ✔ Vehicle refuses to start or has difficulty starting (hard start).
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Loss of communication with the PCM when using a scan tool.
- ✔ False error codes for other sensors that have already been replaced.
The Direct-Fit, Programmed Solution
This module is a direct replacement for several original equipment part numbers, including 12600930, 12616866, 12619810, and 12509307. By programming it specifically to your VIN, we ensure it functions as a seamless replacement, restoring the precise operational parameters your vehicle had when it left the factory. This process corrects software-related issues and ensures all electronic components, from the fuel injectors to the transmission solenoids, receive the correct commands. The result is a smoother, more reliable driving experience.
Simple Process, Professional Results
- ✔ Order: Purchase this PCM.
- ✔ Provide VIN: Reply to your order confirmation email with your 17-digit VIN.
- ✔ Install: Simply disconnect the battery, swap the module, and reconnect the battery. A simple security relearn procedure may be required, which typically takes about 30 minutes and does not require special tools.
Guaranteed Vehicle Compatibility
This electronic control module is a confirmed fit for the following vehicles equipped with the 3.8L engine:
- 2006-2008 Pontiac Grand Prix
- 2006-2008 Buick Lucerne
- 2006-2009 Buick LaCrosse
- 2006-2009 Buick Allure
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your car’s main computer. It controls all aspects of engine and transmission function, including fuel mixture, ignition timing, and shift points, to ensure optimal performance and efficiency.
Do I need to get this PCM programmed?
No, we handle the programming for you before we ship it. All you need to do is provide us with your vehicle’s VIN after purchase. This saves you a trip to the dealership and additional programming fees.
Where is the PCM located on my 2007 Grand Prix?
On the 2006-2008 Grand Prix, as well as the other listed GM models, the PCM is typically located in the lower part of the air cleaner box/housing in the engine bay.
What information do you need from me?
We only need your 17-digit Vehicle Identification Number (VIN). You can find this on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my ‘No Communication with PCM’ error code?
If the module itself has failed, this replacement will very likely resolve communication issues. However, you should always verify that the vehicle’s wiring, fuses, and power/ground connections to the module are intact, as these can also cause communication faults.
Is any additional setup required after installation?
After installing the new PCM, you will likely need to perform a security relearn procedure (also known as a VATS or Passlock relearn). This is a simple process that syncs the new module with your car’s anti-theft system and typically involves turning the key on and off in a specific sequence. Instructions are readily available online for your specific model.