Restore Peak Performance to Your Vehicle
Is your 1998 Buick Riviera, or another compatible GM vehicle, suffering from erratic engine behavior, poor fuel economy, or a persistent check engine light? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. The PCM is responsible for managing critical engine and transmission functions, from fuel injection and ignition timing to emission controls and automatic transmission shift points. When it begins to fail, it can cause a cascade of frustrating and potentially damaging issues. This replacement Powertrain Control Module is the definitive solution to restore your vehicle’s original performance, reliability, and drivability.
From the Diagnostic Bay
I once had a 1998 Grand Prix come in with a transmission that was shifting harshly and unpredictably. The owner had already spent a small fortune replacing shift solenoids and the transmission fluid, with no improvement. After hooking up the scanner, I noticed erratic data coming from the PCM. Instead of chasing more mechanical ghosts, we replaced the module with a properly programmed unit. The car immediately started shifting as smoothly as it did the day it left the factory. It’s a powerful reminder that what seems like a major mechanical failure can often be traced back to the vehicle’s central computer.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) illumination
- ✔ Rough or unstable idling
- ✔ Hesitation or stumbling during acceleration
- ✔ Decreased fuel efficiency
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Engine stalling or difficulty starting
- ✔ Failure to pass emissions testing
- ✔ Communication errors with diagnostic scan tools
Why Choose Our Pre-Programmed 1998 Riviera Powertrain Control Module?
Getting your car back on the road shouldn’t be a complicated process. That’s why we’ve streamlined the repair. This isn’t just a part in a box; it’s a comprehensive solution. When you order from us, you provide your vehicle’s Vehicle Identification Number (VIN), and our technicians will program the module specifically for your car. This process ensures that the PCM has the correct factory settings and the very latest software updates from General Motors. This critical step eliminates the need for an expensive trip to the dealership for programming, saving you both time and money. The module arrives at your door ready for installation.
This unit is a direct replacement for a wide range of popular GM vehicles from the late 1990s, ensuring a perfect fit and seamless integration with your car’s existing systems. It is compatible with the following service numbers: 09356741, 16236757, 9357034, 9357440, and 9366314.
Simple Installation Process
Installation is straightforward for a DIY mechanic or any professional technician. After disconnecting the vehicle’s battery, simply locate and unbolt the old module, disconnect the wiring harnesses, and install the new one in its place. Once connected and the battery is re-engaged, you may need to perform a simple security relearn procedure (often called a VATS relearn), which can typically be done without special tools. This ensures your key is recognized and allows the vehicle to start.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of the engine and transmission to ensure optimal performance, fuel economy, and emissions. It takes data from sensors all over the vehicle and makes real-time adjustments.
Do I need to get this module programmed?
No. This module comes fully programmed to your vehicle’s specific VIN before it is shipped. It is ready for installation right out of the box, saving you a trip to the dealership.
Where is the PCM located on my vehicle?
On most of these GM models, the PCM is located inside the air filter box in the engine compartment. This protects it from the elements while keeping it accessible for service. Always consult a service manual for your specific model to be certain.
What is a security relearn procedure?
This is a simple process that syncs the new PCM with your vehicle’s anti-theft system. It usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating the cycle two more times. This allows the system to recognize the new component.
How do I provide my VIN?
After placing your order, you will be prompted to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your part without it. You can find your VIN on your vehicle’s dashboard (visible through the windshield) or on your registration and insurance documents.
Is this a direct replacement for my original part?
Yes, this is a direct-fit replacement part designed to meet or exceed original equipment specifications. It will plug into the factory wiring harnesses without any modifications required.