Is Your Late-90s GM Running Rough?
If you’re dealing with a persistent Check Engine Light, unpredictable shifting, a no-start condition, or just terrible fuel economy in your 1998-1999 Oldsmobile Cutlass or other compatible GM vehicle, the culprit is often a failing Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen these exact issues countless times. The internal components of these modules can degrade over time due to heat and vibration, leading to frustrating problems that can be difficult to diagnose.
“A customer’s 1998 Buick LeSabre came in last week with what he was sure was a failing transmission. It was shifting hard and sometimes wouldn’t go into overdrive. He’d already spent a fair bit on a transmission service with no improvement. After hooking up my scanner, I saw erratic data from the PCM to the transmission solenoids. We swapped in a pre-programmed PCM, and the car drove like new. It wasn’t a mechanical transmission failure at all; it was the computer giving bad commands. This is a classic scenario for these GM platforms.”
The Direct Solution: A VIN-Programmed PCM
Forget the hassle and high cost of a dealership visit. This Powertrain Control Module is the definitive solution. We take a quality, tested PCM and flash it with the latest official GM software calibration specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) after your purchase. This critical step ensures the module communicates perfectly with your engine, transmission, and all factory-installed options.
Common Symptoms of a Failing GM PCM:
- โ Persistent Check Engine Light (CEL) with various codes
- โ Harsh or erratic automatic transmission shifting
- โ Engine stalling, stumbling, or misfiring
- โ Complete no-start or intermittent starting condition
- โ Noticeable decrease in fuel efficiency
- โ Failure to pass an emissions test
Why Choose Our Pre-Programmed 1998-1999 Cutlass PCM?
This isn’t just a replacement part; it’s a comprehensive solution. By programming the module to your VIN, we ensure it has the correct software for your specific engine (3.1L, 3.4L, 3.8L), transmission, and emissions equipment. This process also loads all available GM updates, which often correct factory bugs and improve overall vehicle performance and reliability. It’s the most reliable way to get your car back to factory-spec operation.
Simple, DIY-Friendly Installation
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On these GM models, it’s typically found in the engine compartment (often inside the air filter box) or under the dashboard on the passenger side.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins for any green or white corrosion and clean them if necessary.
- Swap the Module: Remove the old PCM and install the new one in its place.
- Reconnect Everything: Securely plug the wiring harnesses into your new module and reconnect the negative battery terminal.
- Final Steps: The vehicle may need to run for a few minutes to complete its internal relearn processes. In some cases, a security relearn procedure may be required, which can typically be done without special tools.
Guaranteed Compatibility
This module is a direct replacement for several service part numbers, ensuring a perfect fit and function. It is compatible with the following part numbers and vehicles:
Replaces Part Numbers: 09356741, 16236757, 9356741, 9357034, 9357440, 9366314
Fits a Wide Range of 1998-1999 GM Models Including: Oldsmobile Cutlass, Alero, Achieva, Eighty Eight, Intrigue, Silhouette; Pontiac Grand Am, Grand Prix, Firebird, Bonneville, Trans Sport; Buick LeSabre, Park Avenue, Riviera, Century, Skylark, Regal; Chevrolet Lumina, Malibu, Camaro, Monte Carlo; and the Venture van. Please verify your specific model and engine in the fitment chart to confirm.