Restore Peak Performance to Your GM Vehicle
If you’re dealing with frustrating issues like a persistent check engine light, poor fuel economy, stalling, or erratic engine behavior in your 1998 Buick Regal or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the ‘brain’ of your engine and transmission, its proper function is critical. This replacement PCM, part number 09356741, is the reliable, straightforward solution to get your car running smoothly again. We take the guesswork and extra cost out of the repair by programming the module specifically to your vehicle’s VIN with the latest GM software updates before it even ships.
A Technician’s Notebook
I remember a 1998 Pontiac Bonneville with the 3.8L V6 that came into the shop with a complaint of intermittent stalling at stop lights. No specific codes were stored, just a history of random misfires. The owner had already replaced plugs, wires, and the ignition control module. After checking fuel pressure and finding no vacuum leaks, I hooked up my scope to the PCM’s sensor inputs. I noticed the 5-volt reference signal would occasionally drop out for a millisecond—just long enough to cause a hiccup, but not long enough to set a hard fault. This pointed directly to an internal failure in the original PCM. We installed one of these pre-programmed units, and the problem was solved instantly. It’s a classic example of how a failing 1998 Regal Powertrain Control Module can cause ghost-like issues that are tough to diagnose without experience.
Is Your Vehicle Showing These Symptoms?
A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, it might be time for a replacement:
- âś” Persistent Check Engine Light (CEL)
- âś” Engine stalling or stumbling for no apparent reason
- âś” Noticeable decrease in fuel mileage
- âś” Harsh or incorrect automatic transmission shifting
- âś” Failure to pass an emissions test
- âś” No-start condition where the engine cranks but won’t fire
- âś” Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0606, or communication errors (U-codes).
A Straightforward Guide to Installation
One of the biggest benefits of this module is its simple, plug-and-play installation. Because we program it beforehand, you won’t need a trip to the dealership. For most listed vehicles, the PCM is located in the engine bay, often inside the air filter box for protection.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for any residual power to discharge.
- Locate the Module: Find the existing PCM. It will have several large multi-pin electrical connectors attached.
- Disconnect Connectors: Carefully release the locking tabs or levers on each electrical harness and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old PCM: Unbolt the module from its mounting bracket or housing.
- Install the New PCM: Secure your new, pre-programmed 1998 Regal Powertrain Control Module in place of the old one.
- Reconnect Everything: Firmly seat all electrical connectors until they click into place. Reconnect the negative battery terminal.
- Final Step: Your vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s service information for specific steps if needed.
Verified Vehicle Compatibility
This module is a direct replacement for service number 09356741 and is also compatible with 16236757, 9357034, 9357440, and 9366314. It is designed to fit a wide range of popular GM cars from 1998 and 1999. Please verify your model and engine below:
- Alero: 1999 (3.4L)
- Achieva: 1998 (3.1L)
- Bonneville: 1998
- Camaro: 1998 (3.8L)
- Century: 1998 (3.1L)
- Cutlass: 1998, 1999
- Eighty Eight: 1998
- Firebird: 1998 (3.8L)
- Grand Am: 1998 (3.1L), 1999 (3.4L)
- Grand Prix: 1998
- Intrigue: 1998
- LeSabre: 1998 (3.8L)
- Lumina Car: 1998
- Malibu: 1998 (3.1L)
- Monte Carlo: 1998
- Park Avenue: 1998 (3.8L)
- Regal: 1998
- Riviera: 1998 (3.8L)
- Silhouette: 1998
- Skylark: 1998 (3.1L)
- Trans Sport: 1998
- Venture: 1998 (3.4L)
By purchasing this 1998 Regal Powertrain Control Module, you are getting a quality part that restores your vehicle’s factory logic and performance, all without the extra cost or time of dealership programming. Just provide your VIN at checkout, and we’ll handle the rest.
Frequently Asked Questions
Do I need to get this module programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the latest GM software for your specific car.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car. You can typically find it on a small plate on the driver’s side of the dashboard (viewable through the windshield), on your vehicle’s registration, or on your insurance card.
Is this a difficult part to install for a DIYer?
Not at all. For most of the compatible vehicles, this is a very straightforward swap. It involves disconnecting the battery, unplugging a few connectors, unbolting the old module, and then reversing the process. No special tools are typically required.
Will this fix my check engine light?
If the check engine light is caused by a failing PCM (e.g., codes like P0601), then yes, this part will resolve the issue. However, you should always ensure a proper diagnosis has been performed, as other failing sensors or components can also trigger the light.
What does ‘service number’ mean?
The service number is a part number used by GM for identification. This module replaces several different service numbers, as listed in our compatibility section, making it a versatile solution for many vehicles.