Is Your 1998-1999 GM Truck or Van Running Rough, Stalling, or Refusing to Start?
If you’re dealing with a persistent check engine light, erratic engine behavior, or a complete no-start situation on your Chevrolet 2500, the Powertrain Control Module (PCM) is a very likely culprit. As a technician with over two decades of experience under the hood, I’ve seen countless of these reliable trucks sidelined by a failing engine computer. The symptoms can be confusing, often leading to expensive and unnecessary repairs on other components. This is your chance to get a direct, reliable, and affordable solution.
The Smart Solution: A VIN-Programmed PCM
This is a genuine, used OEM Powertrain Control Module (service number 09355699) that has been professionally tested and is ready for service. The most critical part of the process is that we program it specifically for your truck or van using your Vehicle Identification Number (VIN). This isn’t a generic, one-size-fits-all part. We load the latest GM-certified software and calibrations directly onto the module, ensuring it communicates perfectly with your vehicle’s specific engine, transmission, and options. No expensive trips to the dealership for programming are required.
- ✔ Fix Common Issues: A direct solution for no-start conditions, harsh shifting, false sensor codes, and poor fuel economy.
- ✔ VIN-Programmed for You: We handle the complex programming before we ship. Just provide your VIN at checkout.
- ✔ Save Time and Money: Skip the diagnostic guesswork and expensive dealer programming fees. This is a plug-and-play repair.
- ✔ OEM Reliability: This is a tested, used OEM part, not a low-quality aftermarket alternative.
- ✔ Broad Compatibility: This module, ID 09355699, is a direct replacement for several part numbers and fits a wide range of GM trucks and vans from 1998-1999.
From the Shop Floor: A Real-World Diagnosis
“A customer’s 1999 Chevy 2500 with the 5.7L Vortec was towed in last month. It would crank but wouldn’t start. The owner had already replaced the fuel pump and filter, convinced it was a fuel delivery problem. When I connected my scan tool, I found no communication with the PCM. After verifying power and ground at the PCM connectors—a critical first step—I knew the computer itself was the issue. A failing driver circuit inside the original PCM had completely shut down the engine’s functions. We installed one of our VIN-programmed modules, and the truck fired up on the first try. It’s a classic failure on these vehicles that can easily be misdiagnosed.”
Simple Installation for the DIYer
Replacing the PCM on these trucks is straightforward. You don’t need to be a master mechanic to get your vehicle running again. Just follow these simple steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the PCM: On most 1998-1999 Chevrolet 2500 pickups, the PCM is located in the engine compartment on the driver’s side, near the fender.
- Disconnect the Old Module: Carefully unplug the electrical connectors from the old PCM. There are typically release tabs that need to be pressed or lifted. Inspect the connectors for any corrosion or bent pins.
- Install the New Module: Mount your new, pre-programmed PCM in the same location and securely plug in the connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Start: Reconnect the negative battery terminal. Your vehicle is now ready to start. In some cases, a security relearn procedure may be necessary, which can typically be done without special tools.
Guaranteed Fitment and Compatibility
This Electronic Control Module is a direct replacement for units with service number 09355699. It is also a compatible replacement for the following part numbers: 16266645, 16250279, 16258815, and 09366810. It fits a wide variety of 1998 and 1999 Chevrolet, GMC, Cadillac, Oldsmobile, and Isuzu models. Please check the fitment list to confirm this part is correct for your specific vehicle and options. If you have any doubts, don’t hesitate to contact us with your VIN. We’re here to ensure you get the right part the first time.