Is Your Buick Regal or GM Vehicle Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or transmission shifting problems, a failing Powertrain Control Module (PCM) is often the culprit. This component is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to automatic transmission shifts. When it fails, it can cause a cascade of problems that are difficult to diagnose. This replacement module, part number 09356741, is the definitive solution for restoring your vehicle’s performance and reliability.
From the Diagnostic Bay
I once had a 1998 Grand Prix come into the shop with a complaint of harsh shifting and a random stalling issue that no one could figure out. The owner had already replaced the throttle position sensor and the mass airflow sensor based on codes, but the problem persisted. After hooking up our scanner and monitoring live data, we noticed the PCM was sending erratic signals to the transmission solenoids right before a stall. We swapped in a pre-programmed PCM, and the car ran like it just rolled off the factory floor. It’s a classic case where chasing individual sensors costs more time and money than addressing the root cause: the main computer.
Symptoms of a Failing Powertrain Control Module
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine stalling or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Poor overall engine performance, including hesitation or lack of power.
The Direct Solution: A Programmed 1998 Regal PCM
Don’t let a faulty computer keep your car off the road. We provide a straightforward, effective solution. This isn’t just a generic, off-the-shelf part. Each module is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the PCM has the correct software and calibrations for your engine, transmission, and factory options. We flash it with the latest updates available from GM, which can often resolve issues that were present even when the car was new. The result is a true plug-and-play installation—no expensive trips to the dealership for programming are required.
Broad Compatibility Across the GM Lineup
While this is a perfect match for the 1998 Regal PCM, its versatile architecture allows it to be the correct service replacement for a wide range of late-90s GM vehicles. It is a direct replacement for service numbers 09356741, 16236757, 9357034, 9357440, and 9366314. This module is compatible with popular models like the Pontiac Grand Prix, Chevrolet Lumina and Monte Carlo, Oldsmobile Intrigue, and Buick LeSabre, among many others. Please verify your part number or consult the fitment list to ensure this is the correct component for your specific car.
Simple Installation Process
Replacing your PCM is a job most DIY mechanics can handle in their own driveway. The process typically involves:
- Disconnecting the negative battery terminal.
- Locating the old PCM (often in the engine bay or under the dashboard).
- Carefully unplugging the wiring harnesses.
- Unbolting and removing the old module.
- Installing the new module and reconnecting everything in reverse order.
Once installed, your vehicle will be ready to go, operating with fresh, correct software for optimal performance.
Frequently Asked Questions
Do I need to send you my VIN?
Yes, providing your VIN is essential. We use your vehicle’s unique 17-digit VIN to program the module with the exact software and calibrations from GM. This ensures perfect compatibility and function right out of the box.
Is any additional programming required after installation?
No. This PCM arrives fully programmed and ready for installation. In most cases, you will not need to perform any additional programming or visit a dealer. The goal is a simple, plug-and-play replacement.
Where is the PCM located on my 1998 Buick Regal?
On most GM vehicles from this era, including the 1998 Regal, the PCM is typically located inside the factory air filter box in the engine compartment for protection and cooling. Always disconnect the battery before attempting removal or installation.
Will this fix my transmission shifting problems?
The PCM controls both engine and transmission functions. If your shifting issues are electronic and caused by a failing module, this part is very likely to be the solution. It corrects issues like harsh shifts, delayed engagement, and incorrect shift points that stem from faulty computer logic.
What if my original part number is slightly different?
This module replaces several service numbers, including 16236757, 9357034, and others listed. GM often supersedes part numbers over time. As long as your vehicle is on the compatibility list and you provide your VIN, we will ensure it is programmed correctly for your application.