Is Your Chevrolet Impala Running Rough?
If your 2001, 2002, or 2003 Chevrolet Impala is suffering from issues like erratic shifting, poor fuel economy, a persistent check engine light, or even a no-start condition, the culprit is often a failing Powertrain Control Module (PCM). As the central computer for your vehicle’s engine and transmission, the PCM’s health is critical for performance, efficiency, and reliability. When it begins to fail, it can cause a cascade of frustrating and difficult-to-diagnose problems. This module, part number 12202600, is the direct-fit, reliable solution to get your vehicle back on the road and running as it should.
We had a 2002 Monte Carlo come in with a classic complaint: intermittent stalling at red lights and a check engine light for a random misfire. The owner had already replaced the spark plugs, wires, and even the ignition control module with no luck. After hooking up our scanner and monitoring live data, we noticed the fuel trim values were completely erratic, pointing away from a mechanical issue. We suspected the PCM. After installing a pre-programmed module just like this one, the car ran perfectly. It’s a great reminder that when multiple, seemingly unrelated symptoms appear, it’s often the central computer that’s at fault.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Poor engine performance, including rough idling, stalling, or hesitation.
- ✔ Decreased fuel efficiency for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Why Choose Our 2001-2003 Impala PCM?
This isn’t just a replacement part; it’s a complete solution. We take the guesswork and hassle out of the repair process. Each Powertrain Control Module is meticulously programmed with the latest GM-certified software updates specifically for your vehicle’s VIN. This ensures that all factory parameters for fuel delivery, ignition timing, and transmission shift points are perfectly calibrated. The result is a seamless, plug-and-play installation that restores your vehicle’s original performance and reliability. You are getting a quality-tested electronic control unit that meets or exceeds original equipment specifications.
This module is a direct replacement for part numbers 12202600, 12209614, and 09360210 and fits a wide variety of GM vehicles from the era, including the Chevrolet Monte Carlo, Pontiac Grand Am, Buick Century, and Oldsmobile Alero. By providing us with your VIN upon purchase, you guarantee that the module you receive is 100% compatible with your vehicle’s specific configuration, eliminating the need for expensive dealership programming.
Frequently Asked Questions
Do I need to have this module programmed?
No. This PCM comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). Simply provide your VIN at checkout, and we handle all the programming before shipping. It will arrive ready for installation.
What information do you need from me?
We only need your vehicle’s 17-digit VIN to ensure the module is programmed with the correct software and calibrations for your exact make, model, and engine.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s crucial to ensure the underlying cause is the module itself and not a separate sensor or mechanical problem. We recommend a proper diagnosis before purchasing.
Is a security relearn procedure required after installation?
Yes, on most GM vehicles of this era, you will need to perform a simple security relearn procedure after installing the new PCM. This procedure, often called the Passlock or VATS relearn, can typically be done without any special tools and involves a series of key cycles. Instructions are readily available online or in your vehicle’s service manual.
Is this compatible with other GM models?
Absolutely. While this is a perfect fit for the 2001-2003 Impala, this PCM is also the correct part for many other GM vehicles, including the Monte Carlo, Grand Prix, Century, Alero, Aztek, and more. Please check the detailed fitment list on this page to confirm compatibility with your vehicle.