Is Your GM Vehicle Acting Up?
If you’re dealing with a frustrating check engine light, erratic engine behavior, harsh transmission shifts, or even a no-start condition in your 1998 Buick Skylark, the Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its failure can cause a cascade of confusing problems. I’ve spent years in the shop tracing these exact issues back to a faulty PCM, often after other parts were needlessly replaced.
The Direct-Fit, Programmed Solution
This isn’t just a replacement part; it’s a complete solution. We take a quality-tested PCM, service number 9357034, and professionally program it specifically for your vehicle using your VIN. This critical step ensures that all the unique parameters for your Skylark’s engine, transmission, and options are correctly loaded. We also install the latest GM-released software updates, which can resolve factory bugs and improve overall performance and fuel efficiency.
Expert Pro Tip from a 20-Year Tech
Before you install your new PCM, take a minute to closely inspect the main wiring harness connectors. On these late-90s GM vehicles, the plastic can become brittle and the terminal pins can develop a green-ish corrosion from moisture. A poor connection is one of the leading causes of repeat PCM failure. Use a small brush and some quality electrical contact cleaner to ensure the pins are bright and clean. This simple five-minute check can save you from a major headache down the road.
Why is VIN Programming Essential?
A PCM from a junkyard or a generic online seller won’t work correctly. It will have the incorrect programming for your vehicle’s specific systems, leading to persistent error codes, poor drivability, and failure to pass emissions tests. Our service eliminates that entire problem.
- ✔ No Dealer Required: Arrives ready to install, no expensive programming or key relearn procedures needed.
- ✔ Restores Performance: Fixes common issues like stalling, rough idle, and poor fuel economy.
- ✔ Latest GM Software: Benefit from drivability and reliability improvements from the manufacturer.
- ✔ Guaranteed Compatibility: We match the software to your VIN, ensuring it works seamlessly with your vehicle.
Simple Installation for Your 1998 Skylark PCM
You can get your car back to running smoothly in under an hour with basic hand tools. This is a straightforward swap.
- Safety First: Disconnect the negative terminal from your car’s battery.
- Locate the PCM: On most vehicles this module is located in the engine bay, often inside the air filter box assembly for protection.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Then, unbolt the old module from its mounting bracket.
- Install the New PCM: Bolt the new module in place and securely reconnect the wiring harnesses. Make sure you hear a ‘click’ to confirm they are seated.
- Reconnect Power: Reattach the negative battery terminal. The vehicle is now ready to start.
Broad GM Compatibility
This module, identified by part number 9357034, is a direct replacement for several service numbers, including 09356741, 16236757, 9356741, 9357440, and 9366314. It fits a wide range of 1998 and 1999 GM vehicles. Please verify your part number or consult our detailed fitment list below to ensure this is the correct module for your car.
After purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN, and we’ll handle the programming before shipping.