Is Your 1998 Buick Regal Running Rough?
If you’re dealing with a persistent check engine light, erratic engine behavior, poor fuel economy, or harsh transmission shifting, the problem might not be a faulty sensor or mechanical part. It could be the very brain of your vehicle: the Powertrain Control Module (PCM). The PCM is the central computer responsible for managing your engine’s performance, fuel delivery, ignition timing, and transmission shifting. When it fails, it can cause a cascade of confusing and frustrating symptoms. This replacement Powertrain Control Module, part number 9366314, is the definitive solution to restore your vehicle’s original performance and reliability.
The Plug-and-Play Solution for Your GM Vehicle
Don’t waste time and money at a dealership for programming. We take the guesswork and hassle out of the repair. When you order from us, we flash the module with the latest GM-certified software updates specifically for your vehicle. All we need is your vehicle’s 17-digit Vehicle Identification Number (VIN) during checkout. This ensures that when the part arrives, it’s a true plug-and-play component, ready for installation. This critical programming step synchronizes the module with your car’s specific engine, transmission, and options, guaranteeing a seamless and correct repair.
From the Diagnostic Bay
We once had a 1998 Buick LeSabre with the 3.8L V6 come in with a complaint of intermittent stalling at stoplights. The owner had already replaced the fuel pump and the idle air control valve, but the problem persisted. No specific codes were being stored, just a generic P0300 random misfire code that would pop up occasionally. After hours of chasing our tails checking wiring and fuel pressure, we hooked up a scope to the injector drivers at the PCM. We found that the driver for cylinder 3 was intermittently dropping out when the module got warm. A replacement PCM, programmed to the car’s VIN, solved the problem instantly. It’s a classic case of how a failing computer can mimic a mechanical failure, costing the owner hundreds in unnecessary parts before finding the true cause.
Common Symptoms of a Failing 1998 Regal PCM
- ✔ Check Engine Light: The most common indicator, often with codes related to module communication, sensor circuits, or processor faults.
- ✔ Engine Stalling or Misfiring: The engine may stall for no reason, run rough, or misfire as the PCM fails to properly control fuel and spark.
- ✔ Poor Fuel Economy: Incorrect air/fuel mixture calculations can lead to a sudden and significant drop in MPG.
- ✔ Harsh or Failed Shifting: The PCM also controls the transmission, and a failure can result in jerky shifts, getting stuck in gear, or a complete failure to shift.
- ✔ No-Start Condition: The vehicle may crank but refuse to start if the PCM is not activating the fuel pump or ignition system.
- ✔ Failed Emissions Test: A malfunctioning PCM can prevent the vehicle’s readiness monitors from setting, leading to an automatic failure at the emissions station.
Guaranteed Fitment and Compatibility
This module is a direct replacement for service numbers 09356741, 16236757, 9357034, 9357440, and 9366314. It is designed to work with a wide range of GM vehicles from this era. Please verify your part number and check the list below to ensure compatibility with your specific make, model, and engine option.
This part will fit these makes and models with these options:
- ACHIEVA 98 Electronic Control Module; 6-191 (3.1L)
- ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 16236757, 9356741, 9357440, 9366314
- BONNEVILLE 98 Electronic Control Module
- CAMARO 98 Electronic Control Module; 6-231 (3.8L)
- CENTURY 98 Electronic Control Module; (6-191, 3.1L)
- CUTLASS 98-99 Electronic Control Module
- EIGHTY EIGHT 98 Electronic Control Module
- FIREBIRD 98 Electronic Control Module; 6-231 (3.8L)
- GRAND AM 98 Electronic Control Module; 6-191 (3.1L)
- GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 16236757, 9356741, 9357034, 9347440, 9366314
- GRAND PRIX 98 Electronic Control Module
- INTRIGUE 98 Electronic Control Module
- LESABRE 98 Electronic Control Module; (6-231, 3.8L)
- LUMINA CAR 98 Electronic Control Module; (LH engine compartment)
- MALIBU 98 Electronic Control Module; 6-191 (3.1L)
- MONTE CARLO 98 Electronic Control Module
- PARK AVENUE 98 Electronic Control Module; (6-231, 3.8L)
- REGAL 98 Electronic Control Module
- RIVIERA 98 Electronic Control Module; (6-231, 3.8L)
- SILHOUETTE 98 Electronic Control Module; (LH engine compartment)
- SKYLARK 98 Electronic Control Module; 6-191 (3.1L)
- TRANS SPORT 98 Electronic Control Module; (LH engine compartment)
- VENTURE 98 Electronic Control Module; (6-207, 3.4L)
Frequently Asked Questions
Why do you need my VIN?
Your VIN is essential. It allows us to program the module with the exact software and calibrations for your vehicle’s specific engine, transmission, and factory options. This ensures a perfect match and proper function without needing a trip to the dealer.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the module. However, some GM vehicles of this era may require a security relearn procedure (also known as a CASE relearn) after installation to sync the new PCM with the anti-theft system. This can often be done without special tools and instructions are widely available online.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM, then yes, this part will resolve the issue. However, it’s crucial to have your vehicle properly diagnosed, as the light could be on for other reasons, such as a faulty sensor or wiring problem.
Is this a brand new part?
This is a high-quality, fully tested replacement part that has been meticulously inspected and prepared to meet or exceed original equipment standards. It is programmed with the latest software and is ready for installation.
What if my original part number is not on the list?
The part numbers listed (09356741, 16236757, 9357034, 9357440, 9366314) are the most common service numbers for this module. If your number is different, please contact us with your VIN and original part number to confirm compatibility before ordering.