Is Your 1998 Buick Regal Showing Its Age with Engine Problems?
If you’re dealing with a frustrating Check Engine Light, rough idling, stalling, or unpredictable transmission shifting in your 1998 Regal, the root cause is often a failing Powertrain Control Module (PCM). Over two decades, the delicate internal circuits of these modules can degrade from heat and vibration, leading to a host of confusing and intermittent issues. I’ve seen it countless times in my shop: a customer comes in after replacing sensors and spark plugs, yet the problem persists. The real culprit is the vehicle’s computer brain.
The Direct-Fit Solution: A Pre-Programmed 1998 Regal PCM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a tested, reliable PCM and flash it with the latest official GM software calibrations specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) at checkout. This critical step ensures that the module communicates perfectly with your engine, transmission, and all related systems, restoring the smooth operation you remember. Forget expensive dealership programming fees and long waits—this module is designed to get you back on the road quickly and affordably.
Expert Pro Tip from a 20-Year Veteran Mechanic
Before you plug in your new PCM, take a close look at the vehicle’s wiring harness connectors. On these GM models from the late 90s, the pins can develop a thin layer of green or white corrosion, or even become slightly bent. This creates a poor connection, which is the #1 reason I’ve seen for repeat module failures. Use a small pick or brush and a quality electrical contact cleaner to ensure every pin is clean and straight for a perfect, lasting repair.
Common Symptoms of a Failing PCM:
- ✔ Persistent and unexplained Check Engine Light (CEL)
- ✔ Vehicle refuses to start or stalls intermittently
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or unstable engine idle
- ✔ Communication errors with diagnostic scan tools
Simple Plug-and-Play Installation: No Dealer Visit Required
You can perform this replacement right in your own driveway. While the exact location can vary slightly by model, the process is straightforward for anyone with basic tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most of these GM vehicles, the PCM is located inside the air filter box in the engine bay for easy access.
- Disconnect and Remove: Carefully unclip and remove the wiring harness connectors. Then, unbolt and remove the old module from its mounting bracket.
- Install the New Module: Seat the new PCM into the bracket and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect Power: Re-attach the negative battery terminal. The vehicle is now ready to start with its newly programmed brain.
Guaranteed Compatibility and Peace of Mind
This module is a direct replacement for a wide range of GM vehicles and is cross-compatible with several original service numbers. We guarantee it will work with your vehicle if you have one of the models listed below.
Replaces Part Numbers:
09356741, 16236757, 9357034, 9357440, 9366314
Vehicle Fitment:
- 1998-1999 Oldsmobile Cutlass
- 1998-1999 Pontiac Grand Am (3.1L & 3.4L)
- 1998 Buick LeSabre (3.8L)
- 1998 Buick Park Avenue (3.8L)
- 1998 Chevrolet Venture (3.4L)
- 1999 Oldsmobile Alero (3.4L)
- 1998 Buick Riviera (3.8L)
- 1998 Buick Century (3.1L)
- 1998 Buick Skylark (3.1L)
- 1998 Pontiac Grand Prix
- 1998 Oldsmobile Achieva (3.1L)
- 1998 Oldsmobile Eighty Eight
- 1998 Oldsmobile Silhouette
- 1998 Pontiac Firebird (3.8L)
- 1998 Chevrolet Malibu (3.1L)
- 1998 Oldsmobile Intrigue
- 1998 Chevrolet Lumina Car
- 1998 Pontiac Bonneville
- 1998 Chevrolet Camaro (3.8L)
- 1998 Chevrolet Monte Carlo
- 1998 Buick Regal
- 1998 Pontiac Trans Sport