Restore Your Buick’s Smooth, Reliable Performance
Is your Buick LaCrosse running rough, shifting erratically, or giving you starting trouble? A failing Powertrain Control Module (PCM) is often the hidden culprit behind these frustrating issues, compromising your vehicle’s performance and your peace of mind. This replacement engine computer is the definitive, hassle-free solution to get your car back to factory-spec condition, arriving at your door fully programmed for your specific vehicle.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely cause:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100
- Poor or declining fuel economy
- Engine stalling, stumbling, or rough idling
- Harsh or unpredictable automatic transmission shifting
- Failure to pass emissions testing
- Intermittent or complete no-start conditions
This module is the direct answer to these problems. We take the guesswork out of the repair by programming this unit with the latest GM software updates, tailored specifically to your vehicle’s VIN. This ensures that once installed, your 2006-2009 Buick LaCrosse 3.8L PCM will communicate flawlessly with all other vehicle systems, restoring the smooth operation you expect.
Features & Benefits
- โ VIN-Specific Programming Included: Arrives ready for installation with no need for expensive dealer programming. Just provide your VIN and we handle the rest.
- โ Plug-and-Play Installation: Designed for a straightforward swap. Simply disconnect the battery, remove the old module located in the lower air cleaner housing, and install the new one.
- โ Updated GM Software: Flashed with the newest vehicle-specific calibrations from General Motors to optimize fuel efficiency, emissions, and transmission performance.
- โ Restored Drivability: Eliminates common issues like rough idle, poor acceleration, and erratic shifting, giving you a car that feels like new again.
- โ Guaranteed Compatibility: This is the correct module for all models listed below, ensuring a perfect fit and function.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: A common mistake we see is installing a used, non-programmed PCM. This almost always leads to a no-start condition, immobilizer conflicts, or incorrect transmission behavior because the module isn’t matched to the car’s unique options and security system. Our VIN-programming service ensures this module is a perfect digital handshake for your vehicle’s specific configuration, just like the original from the factory. Itโs the critical step that separates a temporary fix from a lasting, reliable repair.
Fitment Information
This part will fit these makes and models with these options:
- Buick LaCrosse: 2006-2009 (Electronic Control Module; lower air cleaner housing, 3.8L)
- Buick Allure: 2006-2009 (Electronic Control Module; lower air cleaner housing, 3.8L)
- Buick Lucerne: 2006-2008 (Electronic Control Module; lower part of air cleaner box, 3.8L)
- Pontiac Grand Prix: 2006-2008 (Electronic Control Module; lower air cleaner box/housing, 3.8L)
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. This is the core of our service. You provide us with your vehicle’s VIN during or after checkout, and we handle all the programming before the module is shipped to you. It will arrive ready to install.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a difficult part to install?
For most individuals with basic mechanical skills, this is a straightforward installation. The module is typically located in the lower part of the air cleaner box. The key steps are to disconnect the vehicle’s battery, unplug the electrical connectors from the old PCM, remove it, install the new one, and reconnect everything. We always recommend consulting a repair manual for your specific vehicle.
What happens after I place my order?
After you complete your purchase, you will need to send us your VIN. Once we receive your VIN, our technicians will program the 2006-2009 Buick LaCrosse 3.8L PCM with the latest GM software specific to your vehicle. The unit will then be securely packaged and shipped to you.
Will this fix my check engine light?
If the check engine light is caused by a fault within the PCM itself (e.g., internal processor error), then this replacement module will solve the problem. After installation, it is recommended to clear all diagnostic trouble codes with a scan tool to allow the system to reset.
Which part numbers does this unit replace?
This module is a direct replacement for GM part numbers 12600930, 12616866, 12619810, and 12509307. Our programming ensures it functions correctly for all specified applications.