Restore Peak Performance to Your GM 3.8L Vehicle
Is your Pontiac Grand Prix, Chevy Impala, or Buick Regal running rough, stalling unexpectedly, or displaying a persistent check engine light? These are common indicators of a failing Powertrain Control Module (PCM), the central computer responsible for managing your vehicle’s engine and transmission. This replacement PCM, compatible with part numbers 12210234 and 12209624, is the definitive solution to restore your vehicle’s reliability, fuel efficiency, and smooth operation.
The PCM is the brain of your vehicle. It processes data from dozens of sensors to precisely control fuel injection, ignition timing, transmission shift points, and emissions systems. When it begins to fail, the symptoms can be unpredictable and frustrating, often mimicking other component failures. By replacing your faulty module with our pre-programmed unit, you are addressing the root cause of these complex electronic issues.
We had a 2002 Buick LeSabre come in with a complaint of intermittent stalling at stoplights. The customer had already replaced the spark plugs, wires, and even the fuel pump with no success. Diagnostic codes were all over the place, pointing to various sensor failures, but testing the sensors themselves showed they were working fine. This kind of electronic chaos often points to one culprit: the PCM. The internal logic was failing, sending erratic signals and misinterpreting sensor data. After installing a VIN-programmed PCM like this one, the car ran perfectly. It’s a great reminder that when multiple, unrelated codes appear, it’s time to look at the central computer.
Symptoms of a Failing 2001-2003 Grand Prix PCM
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Vehicle fails to start, even with a good battery and starter (no-start condition).
- ✔ Communication errors with diagnostic scan tools.
A True Plug-and-Play Solution
The biggest hurdle in replacing a modern vehicle’s computer is the programming. A module from a salvage yard or a generic new part won’t work correctly because it lacks your vehicle’s specific Vehicle Identification Number (VIN) and operational software. Our process eliminates this problem entirely. When you order, simply provide us with your VIN. We will flash the module with the latest, most stable software updates directly from GM, ensuring it is a perfect match for your vehicle’s specific configuration. This means no expensive trips to the dealership for programming. The module arrives at your door ready for installation.
Guaranteed Compatibility
This Electronic Control Module is a direct-fit replacement for a wide range of popular GM vehicles equipped with the venerable 3.8L V6 engine. Please verify your part number and application from the list below:
- Pontiac Grand Prix: 2001-2003 (3.8L)
- Pontiac Firebird: 2001-2002 (3.8L)
- Pontiac Bonneville: 2001-2003
- Chevrolet Monte Carlo: 2001-2003 (3.8L)
- Chevrolet Impala: 2001-2003 (3.8L)
- Chevrolet Camaro: 2001-2002 (3.8L)
- Buick LeSabre: 2001-2003
- Buick Regal: 2000-2002
- Buick Park Avenue: 2001-2002
Installation is straightforward for a knowledgeable DIY mechanic or any professional technician. The module is typically located in the engine compartment, often on the driver’s side near the air filter housing. Always disconnect the battery before beginning the replacement process.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. This PCM comes fully programmed to your vehicle’s specific VIN before it is shipped. It is ready to install right out of the box, saving you a trip to the dealership.
What is the difference between part numbers 12210234 and 12209624?
These are interchangeable GM service numbers for the same hardware. Our module is a correct replacement for either part number. We ensure the software loaded onto the module is the correct version for your specific vehicle based on the VIN you provide.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this replacement will resolve the issue. It is crucial to properly diagnose the vehicle first, as the check engine light can be triggered by many other failing components.
Where is the PCM located on my 2002 Grand Prix?
On most vehicles this part fits, including the 2001-2003 Grand Prix, the PCM is located in the engine compartment on the driver’s side, inside or near the air filter box assembly.
Is any other procedure required after installation?
In some cases, a security relearn procedure (often called a CASE relearn or Passlock relearn) may be necessary for the vehicle to start. This is a simple procedure that can typically be done without special tools and instructions can be readily found online for your specific model.