Restore Peak Performance to Your GM Vehicle
Is your late-90s GM car—like a 1998 Buick Skylark, Pontiac Grand Am, or Chevy Malibu—running rough, stalling unexpectedly, or refusing to start? The problem often lies with a failing Powertrain Control Module (PCM), the central computer of your engine and transmission. After 20+ years in the garage, I’ve seen countless drivers chase expensive sensor replacements when the real culprit was a faulty PCM. This module is the definitive solution, taking the guesswork out of your repair.
We offer a reliable, direct-fit replacement PCM that arrives at your door completely programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest GM software updates, ensuring it communicates flawlessly with all your car’s systems right out of the box. This means no expensive trips to the dealership for programming—a step that can often cost hundreds of dollars and add days to your repair time. With this module, you’re getting a solution that restores the original drivability and efficiency your car was built for.
Case Study: The Intermittent Stall
A customer brought in a ’98 Grand Prix with a frustrating problem: it would stall randomly after driving for 20-30 minutes, but only on hot days. There were no consistent trouble codes. We checked fuel pressure, ignition components, and sensors—all were fine. Drawing on experience, I suspected a heat-soaked PCM. The internal solder joints on these older modules can crack over time, and heat expansion causes them to lose connection. We swapped in one of our pre-programmed PCMs, and the problem vanished instantly. It’s a classic failure mode that a simple part swap can permanently fix.
Common Signs of a Failing PCM
If your vehicle is experiencing any of these issues, a faulty engine computer is a likely cause. A failing module can trigger a variety of Diagnostic Trouble Codes (DTCs), most notably P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” Check Engine Light is on or flashing
- âś” Engine stalling, stumbling, or misfiring
- âś” No-start or hard-starting conditions
- âś” Poor fuel economy
- âś” Harsh or erratic automatic transmission shifting
- âś” Failure to pass an emissions inspection
A Straightforward Guide to Installation
Replacing the 1998 Skylark Powertrain Control Module is a job most DIYers can handle in under an hour with basic hand tools. Our pre-programmed unit makes it a true plug-and-play process.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these GM models, the PCM is located in the engine bay, often inside the air filter box housing for protection. Consult a repair manual for your specific model if you’re unsure.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Seat the new PCM onto the mounting bracket and secure it with the bolts. Firmly reconnect the electrical harnesses until they click into place.
- Reconnect Power: Re-attach the negative battery terminal. The vehicle may need to complete a brief idle-relearn procedure, but no special tools are required. Just start the engine and let it idle for a few minutes.
Verified Vehicle Compatibility
This PCM, part number 9357034, is a direct replacement for service numbers 09356741, 16236757, 9356741, 9357440, and 9366314. It is guaranteed to fit the following vehicles:
ALERO 1999 (3.4L)
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)
This 1998 Skylark Powertrain Control Module is the heart of your vehicle’s engine management system. Don’t let a faulty one keep you off the road. Order today for a reliable, pre-programmed solution.
Is this module truly plug-and-play?
Is this module truly plug-and-play?
Yes. Because we program the module to your car’s VIN before shipping, it is ready for installation right out of the box. No additional programming or dealer visits are required. In some cases, a security relearn procedure may be necessary, which can be done without special tools and instructions are readily available.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically find this on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Will this fix my Check Engine Light?
If the Check Engine Light is on due to an internal PCM failure (like codes P0601-P0606) or a fault that the PCM itself is causing, then yes, this part will resolve the issue. However, it’s always best to have the codes scanned to ensure the PCM is the root cause and not a separate sensor or wiring issue.
What’s the benefit of the ‘newest GM updates’?
Over the life of a vehicle, manufacturers often release software updates to fix bugs or improve performance, such as refining shift points or adjusting fuel trims. By flashing your module with the latest software, we ensure your vehicle benefits from all of these factory improvements for optimal operation.
What if my original part number is different from 9357034?
This module is a direct replacement for multiple GM service numbers, including 09356741, 16236757, 9357440, and 9366314. As long as your vehicle is on our compatibility list, this part will function correctly, even if the number on your old unit is different.