Restore Peak Performance to Your 1998 Buick Skylark
If your 1998 Buick Skylark is suffering from frustrating issues like a persistent Check Engine Light, poor fuel economy, erratic engine behavior, or harsh transmission shifting, a failing Powertrain Control Module (PCM) is a very likely culprit. As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it fails, the entire system’s performance and reliability are compromised. This replacement PCM is the definitive, hassle-free solution to get your vehicle running like new again.
We had a ’98 Grand Am with the 3.1L V6 come in, which shares its core electronics with the Skylark. The owner was chasing a random stalling and misfire issue for months. They had replaced spark plugs, wires, and even the fuel pump with no success. No consistent trouble codes were being stored, making it a real head-scratcher. We finally connected an oscilloscope to the injector driver circuits at the PCM and saw the signal dropping out intermittently. The module was failing internally. A new, correctly programmed PCM fixed the car in under an hour. It’s often the last part people suspect, but it’s the brain of the entire powertrain.
Is Your Vehicle Showing Signs of a Failing PCM?
A faulty computer can manifest in numerous ways. Look out for these common symptoms that point directly to a problem with your 1998 Skylark PCM:
- ✔ Persistent Check Engine Light (CEL) with PCM-related codes (e.g., P0600-P0606).
- ✔ Unexplained decrease in fuel mileage.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ Engine stumbling, hesitating, or misfiring.
- ✔ Intermittent stalling or difficulty starting the engine.
- ✔ Failure to pass state emissions testing.
- ✔ No communication between the PCM and a diagnostic scan tool.
The VIN-Programmed Advantage
This isn’t a generic, one-size-fits-all part that requires expensive trips to the dealership for programming. We eliminate that step entirely. When you place your order, you provide us with your vehicle’s VIN. Our technicians then flash the module with the latest, most up-to-date GM software specific to your car’s engine, transmission, and factory options. This ensures that every parameter is set to factory specifications, providing a true plug-and-play installation. This process corrects for any bugs or drivability issues that may have been present in the original software.
Broad GM Compatibility
This Powertrain Control Module is a direct replacement for multiple service numbers, including 09356741, 16236757, 9357034, 9357440, and 9366314. While it is the perfect solution for a 1998 Skylark PCM, it also fits a wide range of other 1998-1999 GM vehicles such as the Buick Century, LeSabre, Regal; Chevy Camaro, Malibu, Monte Carlo, Venture; Oldsmobile Alero, Cutlass, Intrigue; and Pontiac Bonneville, Firebird, and Grand Am. Please check the detailed fitment list to confirm compatibility with your exact model.
Frequently Asked Questions
Do I need to do any programming myself?
No. This module arrives at your door fully programmed to the VIN you provide during checkout. It is ready to be installed immediately.
Why do you need my VIN?
Your vehicle’s VIN is crucial for us to load the exact, correct GM factory software for your specific engine, transmission, and options. This guarantees perfect compatibility and proper vehicle operation.
What is a security relearn procedure?
After installation, you may need to perform a simple security relearn to sync the new PCM with your car’s anti-theft system (VATS). This procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating a few times. It does not require a mechanic or any special tools.
Will this fix my transmission shifting problems?
The PCM controls both the engine and the transmission. If your shifting issues are caused by faulty electronic commands from the module, then yes, this part is very likely to resolve the problem and restore smooth shifting.
Is there a core charge for my old part?
No, there is no core charge associated with this part. You do not need to send your old module back to us.