Is Your Buick Rendezvous Experiencing Engine Problems?
If your 2002-2003 Buick Rendezvous, or another compatible GM vehicle, is suffering from a persistent check engine light, erratic engine behavior, poor fuel mileage, or even a no-start condition, a failing Powertrain Control Module (PCM) could be the culprit. The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This replacement PCM, part number 12202600, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2003 Pontiac Aztek come in that had its owner chasing ghosts for months. The vehicle would randomly stall at red lights and had a check engine light for an O2 sensor that kept coming back, even after replacing the sensor twice. The owner had spent hundreds on parts and labor with no success. After hooking up our professional scan tool, we noticed erratic data streams coming from the PCM itself. It wasn’t processing sensor inputs correctly. We installed a VIN-programmed module just like this one, and the problems vanished instantly. It’s a classic case where the ‘brain’ was the issue, not the components it was reading.
Symptoms of a Failing GM PCM
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0602, or P0606.
- ✔ Unexplained drop in fuel economy.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or inconsistent idling.
- ✔ Harsh or delayed shifting from the automatic transmission.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our 2002-2003 Rendezvous Powertrain Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle in replacing a modern vehicle computer is the complex programming required to make it communicate with your specific vehicle. We eliminate that step for you. When you purchase this module, we will flash it with the latest official GM software updates, precisely calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless integration and optimal performance right out of the box. You get a direct-fit component that restores factory function without the exorbitant cost and hassle of a dealership visit.
This module is a direct replacement for part numbers 12202600, 12209614, and 09360210, and fits a wide range of General Motors vehicles including the Buick Century, Pontiac Grand Am, Chevrolet Impala, Oldsmobile Alero, and many more. Please verify the fitment list to ensure compatibility with your specific model and year.
Frequently Asked Questions
Do I need to do any programming after I receive this module?
No. This module arrives fully programmed to the VIN you provide during checkout. It is a plug-and-play installation. In some cases, a security relearn procedure may be necessary, which is a simple process that can be done without any special tools.
What is the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. ECU (Engine Control Unit) is a general term. ECM (Engine Control Module) typically controls only engine functions. A PCM (Powertrain Control Module) is more integrated and controls both the engine and the transmission. This part is a PCM.
Where is the PCM located on my 2002 Buick Rendezvous?
On most compatible vehicles for this part, including the 2002-2003 Rendezvous, the PCM is located in the engine compartment on the left-hand (driver’s) side, often inside or near the air filter housing.
How do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
What happens if I install this without providing a VIN?
The module will not function correctly. It contains software specific to a vehicle’s options and security system. We cannot ship the part until we receive your VIN to ensure it is programmed correctly for your vehicle.