Is Your GM Vehicle Running Rough? The Solution is Here.
If you’re dealing with a frustrating check engine light, poor fuel mileage, erratic shifting, or a no-start condition in your 1998 Buick Riviera or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is a very likely culprit. As the brain of your vehicle’s engine and transmission, when the PCM starts to fail, it can create a cascade of problems that are often misdiagnosed. This isn’t just a replacement part; it’s the central command center, restored and ready for duty.
This listing is for a replacement PCM, service number 9356741, that arrives at your door programmed specifically for your vehicle. We take your Vehicle Identification Number (VIN) and flash the module with the latest, most stable software updates directly from GM. This critical step ensures seamless communication with your car’s other systems, restoring performance and reliability.
Expert Pro Tip: Check Your Connectors!
Before you install your new PCM, take a moment to inspect the wiring harness connectors. Over 20+ years, it’s common for the pins to develop a thin layer of green or white corrosion, or for the plastic to become brittle. Use a quality electronics cleaner and a small brush to gently clean the pins on the harness side. A clean, solid connection is critical for the new module to function correctly and will prevent a host of future electrical gremlins.
Why Choose Our Programmed 1998 Riviera Powertrain Control Module?
In my two decades of hands-on diagnostics, I’ve seen hundreds of GM vehicles from this era. A common scenario I encountered was a customer’s 1998 Park Avenue that came in with what they described as a ‘slipping transmission.’ The codes were all over the place. Instead of jumping to a costly transmission rebuild, we checked the data stream from the PCM and found it was sending erratic signals to the shift solenoids. A correctly programmed replacement PCM like this one solved the problem for a fraction of the cost. This is the kind of targeted, effective repair we provide.
- ✔ VIN-Programmed for Your Vehicle: We flash the module with your car’s specific VIN, ensuring it works with your factory options and anti-theft system right out of the box.
- ✔ Latest GM Software: Your module comes loaded with the newest software updates to correct original factory bugs and improve performance and efficiency.
- ✔ Solves Common Issues: Directly addresses symptoms like harsh shifting, engine stumbling, false sensor codes, and intermittent stalling.
- ✔ Direct-Fit Replacement: Guaranteed to fit and function correctly, saving you from the guesswork of a junkyard part.
Simple Installation: Get Back on the Road
You don’t need a trip to the dealership for a costly programming session. Once you receive your module, installation is straightforward. While the exact location can vary slightly by model, the process is generally the same.
- Safety First: Always disconnect the negative terminal from your car’s battery and wait 10-15 minutes for any residual power to discharge.
- Locate the PCM: On most of these vehicles, the PCM is located in the engine compartment, often inside the air filter box assembly, or under the passenger side of the dashboard.
- Disconnect the Harness: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Do not force them.
- Swap the Modules: Unbolt the old PCM and remove it. Secure the new, programmed module in its place.
- Reconnect and Test: Plug the wiring harnesses firmly into the new module until they click. Reconnect your battery terminal. Your vehicle is now ready to start.
Guaranteed Compatibility
This module is a direct replacement for several original service numbers. Please verify your original part number or contact us with your VIN to confirm fitment. This part is compatible with the following service numbers: 09356741, 16236757, 9357034, 9357440, and 9366314.
It is designed to fit the following GM models:
- Alero (99), Achieva (98)
- Bonneville (98)
- Camaro (98, 3.8L)
- Century (98)
- Cutlass (98-99)
- Eighty Eight (98)
- Firebird (98, 3.8L)
- Grand Am (98-99)
- Grand Prix (98)
- Intrigue (98)
- LeSabre (98)
- Lumina Car (98)
- Malibu (98)
- Monte Carlo (98)
- Park Avenue (98)
- Regal (98)
- Riviera (98)
- Silhouette (98)
- Skylark (98)
- Trans Sport (98)
- Venture (98)
After purchase, please send us a message with your vehicle’s 17-digit VIN so we can program the module before shipment. This step is required to get you the right part, ready for installation.