Is your 1998 Buick Riviera or another compatible GM vehicle suffering from perplexing engine issues? A faulty Powertrain Control Module (PCM) is often the culprit behind problems like a persistent check engine light, poor performance, erratic shifting, or even a no-start condition. This module is the central computer for your vehicle’s engine and transmission, and when it fails, it can create a cascade of frustrating symptoms. We offer a reliable, direct-fit solution: a replacement PCM, professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships.
From the Diagnostic Bay
We had a 1998 Buick LeSabre come in that was driving the owner crazy. It would stall intermittently at stoplights, but never consistently enough to catch it in the act. We checked the fuel pressure, ignition system, and all the usual suspects, but everything tested fine. No codes were stored, except for an occasional random misfire. After exhausting the basics, we hooked up a scope to the PCM outputs and noticed the injector control signal would drop out for a split second, just before the stall. We swapped in one of our VIN-programmed PCMs, and the problem vanished instantly. It’s a classic case of an internal PCM failure that doesn’t always throw a clear diagnostic code.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) illumination
- ✔ Engine stalling, stuttering, or misfiring
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Vehicle fails to start or has difficulty starting
- ✔ Communication errors when using a diagnostic scan tool
- ✔ Failure to pass state emissions testing
Why Our VIN-Programmed 1998 Riviera PCM is the Right Choice
Replacing the brain of your vehicle isn’t as simple as swapping a battery. The PCM is integrated with your car’s security system (VATS/Passlock), transmission, and emissions equipment. Our process eliminates the guesswork and costly trips to the dealership. When you order, you provide us with your VIN. We then flash the module with the latest GM-certified software updates specific to your vehicle’s build. This ensures that when you receive the part, it is a true plug-and-play solution. The module will correctly recognize your keys and communicate flawlessly with all other onboard systems, restoring your vehicle’s original performance and reliability.
Guaranteed Compatibility
This Powertrain Control Module is a direct replacement for a wide range of 1998 and 1999 General Motors vehicles. Please verify that your original module’s service number matches one of the following to ensure perfect fitment:
Compatible Service Numbers: 09356741, 16236757, 9356741, 9357034, 9357440, 9366314
This unit fits dozens of models, including the Buick Century, LeSabre, Park Avenue, Regal, Skylark; Chevrolet Camaro, Lumina, Malibu, Monte Carlo, Venture; Oldsmobile Achieva, Alero, Cutlass, Eighty Eight, Intrigue, Silhouette; and Pontiac Bonneville, Firebird, Grand Am, Grand Prix, and Trans Sport. Please use the fitment chart to confirm compatibility with your specific vehicle and engine option.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. We handle all the programming for you before shipping. Simply provide your vehicle’s VIN when you place your order, and the module will arrive ready for installation.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car. It contains critical information about the engine, transmission, and factory options. We use it to load the exact correct software onto your new PCM, ensuring it works perfectly with your specific vehicle.
Is any special procedure needed after installation?
In most cases, this is a plug-and-play installation. However, for some vehicles, a Crankshaft Variation Relearn (also known as a CASE relearn) may be required to clear a P1336 trouble code. This procedure can be performed by many professional scan tools.
How do I find my module’s service number?
The service number is printed on a sticker on the case of your original PCM. You will need to locate and access the module in your vehicle to read this number. It is typically a 7 or 8-digit number.
Will this fix my car’s problem for sure?
This part will correct the issue if the PCM is the root cause of the failure. It’s essential to perform proper diagnostics to rule out other potential problems like faulty sensors, wiring, or fuel system components before ordering.