Restore Peak Performance to Your GM Vehicle
Is your 1998 Buick Skylark or other GM vehicle suffering from a mysterious ailment? Issues like a persistent Check Engine Light, rough idling, stalling, or poor fuel economy can often be traced back to a single, critical component: the Powertrain Control Module (PCM). As an experienced technician, I’ve seen firsthand how a failing engine computer can cause frustrating and hard-to-diagnose problems. This isn’t just a part; it’s the brain of your engine, and when it’s not functioning correctly, nothing else will.
This Powertrain Control Module, part number 9357034, is the definitive solution. We take the guesswork and hassle out of the repair by programming the module specifically for your car using your Vehicle Identification Number (VIN). This means it arrives at your door with the latest GM software updates already installed, ready for a straightforward installation. You get to skip the expensive trip to the dealership for programming, saving you both time and money.
Case Study: A Tricky Diagnosis
I remember a 1998 Pontiac Grand Am that came into the shop with an intermittent no-start condition. The owner had already replaced the battery and starter with no luck. The computer scans were inconsistent, sometimes showing no codes at all. After checking the fuel and spark systems, which seemed fine, we focused on the PCM. On older GM vehicles like this, the internal processors of the PCM can develop microscopic cracks in the solder joints from years of heat cycles. We connected a test module, and the car started perfectly every time. By installing a correctly programmed 1998 Skylark Powertrain Control Module (which also fits that Grand Am), we provided a permanent fix for a problem that had stumped others. It’s a classic example of how the right part can solve a seemingly complex electrical issue.
Is Your GM Vehicle Showing These Signs?
A failing PCM can manifest in various ways. If you’re experiencing any of the following, it might be time for a replacement:
- ✔ Check Engine Light is on (especially with codes like P0601 – Internal Control Module Memory Check Sum Error)
- ✔ Engine cranks but refuses to start
- ✔ Unexplained drops in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Stalling or rough running, especially after warming up
- ✔ Failure to pass an emissions test
A Straightforward Guide to Installation
Replacing your PCM is a job most DIYers can handle with basic tools. This pre-programmed module makes it even simpler.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these vehicles, the PCM is located in the engine compartment, often inside the air filter housing or mounted to the firewall. Consult a repair manual for your specific model if you’re unsure.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. There are typically release tabs that need to be pressed. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed PCM in the same location. Reconnect the wiring harnesses, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal. The vehicle may need to go through a brief idle relearn procedure, which usually involves starting it and letting it idle for a few minutes.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 09356741, 16236757, 9356741, 9357034, 9357440, and 9366314. It is guaranteed to fit the following models:
- Achieva: 1998 (3.1L)
- 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)
Why do I need to provide my VIN?
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your car needs. This ensures perfect compatibility with your engine, transmission, and factory options, making the installation plug-and-play.
Is any additional programming required after installation?
No. This module arrives fully programmed and ready to install. In some cases, a security or crank-sensor relearn procedure may be needed, which can be done with a capable scan tool or by following specific instructions for your vehicle.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM (like code P0601), then yes, this part will resolve the issue. However, if the code is for a faulty sensor or another component, that part will also need to be repaired.
What is the difference between a PCM and an ECM?
The terms are often used interchangeably. An ECM (Engine Control Module) only controls engine functions. A PCM (Powertrain Control Module) is more integrated and controls both the engine and the transmission. This part is a PCM.
How do I send you my VIN?
After you complete your purchase, you will receive instructions on how to provide us with your vehicle’s 17-digit VIN. We cannot ship the part until we receive this information for programming.