Is Your Buick Rendezvous or GM Vehicle Acting Up?
If you’re experiencing baffling engine problems with your 2003-2005 Buick Rendezvous, Chevrolet Impala, Pontiac Aztek, or other compatible GM model, the root cause might be the very brain of your vehicle: the Powertrain Control Module (PCM). As the central command center for your engine and transmission, a failing PCM can create a cascade of issues that can be frustrating and difficult to diagnose. From a persistent Check Engine Light to erratic shifting and even a no-start condition, a faulty module can bring your daily drive to a halt. This replacement PCM, part number 89017735, is the definitive solution to restore your vehicle’s performance, reliability, and drivability.
From the Diagnostic Bay
We had a 2004 Buick Century come into the shop that was giving the owner fits. The car would randomly stall at stoplights, and the transmission would occasionally slam into gear. The owner had already replaced the crank sensor and a few transmission solenoids with no luck. After hooking up our professional scan tool, we noticed erratic data PIDs coming from the PCM, and communication would drop out intermittently. We suspected an internal fault in the module. Instead of a costly trip to the dealer, we sourced a VIN-programmed PCM like this one. After a straightforward installation and performing the security relearn procedure, the car ran perfectly. All the ghost-like symptoms vanished, proving that a solid, correctly programmed 2003-2005 Rendezvous PCM was the key all along.
Common Symptoms of a Failing PCM
A failing Powertrain Control Module can manifest in various ways. If you’re noticing any of the following signs, it’s a strong indicator that your PCM may need replacement:
- ✔ Persistent Check Engine Light (CEL) with various communication or processor-related trouble codes (e.g., P0601, P0606).
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy.
- ✔ The vehicle cranks but refuses to start.
- ✔ Failure to pass an emissions or smog test.
- ✔ Intermittent issues that seem to have no connection to a specific mechanical part.
The Plug-and-Play Solution: Your Programmed 2003-2005 Rendezvous PCM
Don’t let a faulty computer keep your car off the road. This isn’t just a generic, off-the-shelf part. We take the guesswork out of the repair by pre-programming this module specifically for your vehicle. When you place your order, you simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use this information to flash the unit with the latest, most stable software updates directly from General Motors. This ensures that the module communicates flawlessly with your vehicle’s engine, transmission, and other systems right out of the box.
This process guarantees compatibility and optimal performance, addressing any factory software bugs that may have existed in your original unit. Upon arrival, the primary installation steps are straightforward. In most cases, you will need to perform a simple security relearn procedure (often called a ‘key relearn’ or ‘anti-theft relearn’), which can typically be done in your driveway without any special tools. This syncs the new PCM with your vehicle’s anti-theft system.
Wide-Ranging GM Compatibility
This versatile electronic control module is a direct replacement for part numbers 89017735, 12583827, and 12583826. It is engineered to fit a broad array of GM vehicles from the mid-2000s, including:
- Buick Century (2003-2005)
- Buick LeSabre (2004-2005)
- Buick Park Avenue (2004-2005)
- Buick Rendezvous (2003-2005)
- Chevrolet Impala (2003-2005)
- Chevrolet Malibu (2003)
- Chevrolet Monte Carlo (2003-2005)
- Chevrolet Venture (2003-2005)
- Oldsmobile Alero (2003-2004)
- Oldsmobile Silhouette (2003-2004)
- Pontiac Aztek (2003-2005)
- Pontiac Bonneville (2004-2005)
- Pontiac Grand Am (2003-2005)
- Pontiac Grand Prix (2003)
- Pontiac Montana (2003-2005)
Restore the precision and reliability of your vehicle’s powertrain with a high-quality, professionally programmed PCM. Get your car back on the road and running like it should.
Frequently Asked Questions
What is VIN programming and why is it necessary?
VIN programming is the process of loading your vehicle’s specific software and calibration files onto the PCM. This includes information about your engine, transmission, tire size, and factory options. It is essential for the module to function correctly and communicate with all other systems in your car. We handle this for you before shipping.
Will I need to do anything after I install this PCM?
Yes, after installation, you will most likely need to perform a security relearn procedure. This is a simple process that syncs the new PCM to your car’s anti-theft system and keys. Instructions are readily available online and typically involve turning the key on and off in a specific sequence. No special tools are required.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Is this part compatible with my 2004 Pontiac Grand Am with a 3.4L engine?
Yes, this PCM is a confirmed fit for the 2004-2005 Pontiac Grand Am with the 3.4L engine, as well as many other GM vehicles listed in the description. Providing your VIN during checkout ensures we load the exact correct software for your specific model and options.
How do I know for sure my PCM is the problem?
While the symptoms listed are strong indicators, a definitive diagnosis often requires a professional scan tool to check for communication errors or specific processor fault codes (like P0601-P0606). If you’re unsure, consulting with a qualified mechanic to rule out other issues like bad wiring or sensors is always a good idea.