Is Your Blazer or Jimmy Experiencing Critical Engine Issues?
If your 2001-2002 Chevrolet Blazer, S10, GMC Jimmy, or Sonoma is suffering from a persistent check engine light, erratic engine behavior, stalling, or a complete no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer of your vehicle, the PCM manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This replacement PCM, service number 12200411, is the definitive solution to restore your truck’s reliability and performance.
From the Diagnostic Bay
We had a 2002 GMC Jimmy come into the shop that had its owner completely stumped. The truck would randomly stall at stoplights and occasionally refuse to start, but there were no consistent trouble codes—just a generic U-code for lost communication. The owner had already replaced the fuel pump and the ignition control module based on advice from online forums, with no success. We hooked up our scanner and monitored the live data. We noticed the 5-volt reference signal to the sensors would intermittently drop out right before a stall. This pointed directly to an internal failure in the PCM. Instead of chasing ghosts and replacing more good parts, we installed a VIN-programmed PCM. The truck fired right up, the 5-volt reference held steady, and the random stalling was completely gone. It’s a classic case of how a faulty computer can mimic a dozen other mechanical problems.
Why Choose a VIN-Programmed 2001-2002 Blazer PCM?
Simply swapping a used computer from another vehicle will not work. Your truck’s PCM is tied directly to its Vehicle Identification Number (VIN) and contains specific software for its engine, transmission, and options. Our service eliminates the guesswork and the need for expensive dealership programming. We take your vehicle’s VIN and flash this module with the latest, most stable software updates directly from GM. This ensures that the unit is a true plug-and-play solution, communicating perfectly with all other modules in your vehicle and correcting common factory software bugs.
Common Symptoms of a Failing PCM:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Poor fuel economy and reduced engine power.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ False readings from dashboard gauges.
Installation and Compatibility
This 2001-2002 Blazer PCM is located in the right-hand front of the engine compartment. Installation is straightforward for a DIY mechanic with basic tools. After providing us with your VIN upon purchase, we will program the module and ship it to you. Once installed, you will need to perform a simple security relearn procedure (often called a VATS or Passlock relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure typically takes about 30 minutes and does not require any special tools.
This module is a direct replacement for several part numbers, ensuring wide compatibility across the GM truck and SUV lineup. It is compatible with service numbers: 12200411, 12201281, 12576160, and 52369718. While this listing is focused on the Blazer and Jimmy, this powerful P01/P59 controller was used in dozens of vehicles, including the Silverado, Sierra, Tahoe, Yukon, Express, Savana, and even the Corvette and Camaro, making it a proven and reliable hardware platform.
Frequently Asked Questions
Do I need to have this PCM programmed?
No additional programming is needed. This PCM comes pre-programmed to your vehicle’s specific VIN. You simply provide us with your VIN after purchase, and we handle all the software flashing before it ships.
What is the security relearn procedure?
The security relearn, or VATS/Passlock relearn, syncs the new PCM to your vehicle’s anti-theft system. It’s a simple procedure you can do yourself. It usually involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. We include instructions to make it easy.
Where is the PCM located on my 2001 Blazer?
On the 2001-2002 S-10 Blazer and S-15 Jimmy, the PCM is located in the engine bay, typically on the right-hand (passenger) side, near the firewall or inner fender.
Will this fix my specific problem?
This PCM is a direct solution for issues caused by a faulty computer. If your vehicle exhibits symptoms like stalling, no-start conditions, or communication error codes, and you’ve ruled out other mechanical or electrical issues, a failing PCM is the likely cause. Proper diagnosis is always recommended.
Are there any other part numbers this is compatible with?
Yes, this PCM with service number 12200411 is also a direct replacement for part numbers 12201281, 12576160, and 52369718, among others. It was a very common computer used across many GM platforms from 2001 to 2002.