Restore Your Vehicle’s Brain and Get Back on the Road with Confidence
If you’re dealing with a frustrating check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition in your 2001-2002 Buick Century or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As a technician with over two decades of experience under the hood, I’ve seen countless drivers chase these electronic gremlins, replacing sensor after sensor, only to find the core issue lies with the engine’s computer. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s performance and reliability.
This PCM, part number 12202600, arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We handle the complex part for you. Using official GM software, we flash the module with the latest factory updates, ensuring it communicates perfectly with your engine, transmission, and all related systems. This eliminates the need for an expensive trip to the dealership for programming, saving you significant time and money. It’s the most effective way to solve complex drivability problems and ensure your engine operates at peak efficiency, just as the manufacturer intended.
Case Study: The Elusive Century Stall
I remember a 2002 Buick Century that came into my shop with an intermittent stalling problem that was driving the owner crazy. It would die at stoplights without warning, but there were no consistent trouble codes—just a general feeling that the car couldn’t be trusted. We checked the fuel pressure, ignition system, and sensors, all of which tested fine. After hooking up a scope, we noticed the injector pulse width would occasionally drop out for a split second right before a stall. This pointed directly to the processor inside the PCM. After installing one of our pre-programmed modules, the stalling vanished completely. The customer was thrilled to have their dependable car back, a fix that took less than an hour to install once we had the right part.
Common Signs of a Failing PCM
A faulty engine computer can manifest in numerous ways. If your vehicle is experiencing any of the following, a failing PCM could be the root cause. Look out for these symptoms and associated Diagnostic Trouble Codes (DTCs):
- âś” Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” The engine cranks but refuses to start.
- âś” Unexplained drop in fuel mileage.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Engine stalling, stumbling, or running rough for no apparent reason.
- âś” Failure to pass an emissions or smog test.
A Straightforward Guide to Installation
This module is designed for a direct-fit replacement. While professional installation is always an option, a confident DIYer can perform this job. Always consult a vehicle-specific repair manual.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most listed vehicles, the PCM is found in the engine compartment, typically inside the air filter housing on the driver’s side (LH).
- Disconnect the Connectors: Carefully unclip and remove the wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it. Reconnect the wiring harnesses firmly.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn: You will likely need to perform a simple security relearn procedure (often called a Passlock or Passkey relearn) to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes.
Verified Vehicle Compatibility List
This module is a direct replacement for part numbers 12202600, 12209614, and 09360210. It is guaranteed to fit the following GM models and years. Please verify your vehicle is on this list before ordering.
- ALERO 2001-2003 (3.4L)
- AURORA 2001-2002 (3.5L)
- AZTEK 2001-2003
- CENTURY 2001-2002
- GRAND AM 2001-2003 (3.4L)
- GRAND PRIX 2001-2003 (3.1L)
- IMPALA 2001-2003 (3.4L)
- INTRIGUE 2001-2002
- LUMINA CAR 2001
- MALIBU 2001-2003
- MONTANA 2001-2002
- MONTE CARLO 2001-2003 (3.4L)
- RENDEZVOUS 2002-2003
- SILHOUETTE 2001-2002
- VENTURE 2001-2003
Frequently Asked Questions
What do I need to do after I purchase?
After you complete your purchase, you must send us your vehicle’s 17-digit VIN. We cannot program and ship your module without it. Please double-check the VIN for accuracy to ensure perfect compatibility.
Is this part difficult to install?
For most of the compatible vehicles, the module is located in an accessible spot in the engine bay. The physical replacement is straightforward. The only additional step is a simple key-cycle security relearn procedure, which does not require any special tools.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine functions and transmission shift points. If the module is failing, it can cause harsh shifting, delayed engagement, or incorrect gear selection. A new, properly programmed PCM often resolves these issues.
Why are the latest GM updates important?
Vehicle manufacturers often release software updates to address issues discovered after the vehicle was built. These can improve fuel economy, emissions performance, and shifting logic. Our programming service ensures your module has this improved software, which you wouldn’t get from a standard used part.
Do I need to send my old PCM back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.