Restore Peak Performance to Your GM Truck or Van
Is your 1998-1999 Chevrolet Express 2500, or another compatible GM vehicle, suffering from perplexing issues like rough idling, poor fuel economy, stalling, or a check engine light that won’t quit? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. A faulty PCM can disrupt everything from fuel injection and ignition timing to transmission shifting, making your reliable workhorse feel unpredictable and unsafe. Don’t let a bad computer sideline your vehicle. This is your direct-fit, VIN-programmed solution to get back on the road with confidence.
This is a genuine, used OEM Powertrain Control Module that has been meticulously tested and is ready for installation. We take the guesswork and hassle out of the replacement process. Before we ship, our technicians will program the module with the latest GM software updates specifically for your vehicle’s Vehicle Identification Number (VIN). This ensures that once you receive it, the unit is ready to be installed and will communicate perfectly with all the other systems in your truck or van. No expensive trips to the dealer for programming are required.
From the Diagnostic Bay
We had a 1999 Savana 2500 come into the shop with a complaint of erratic transmission shifting and a persistent check engine light for a random misfire. The owner had already replaced the spark plugs, wires, and even the transmission fluid, with no improvement. After hooking up our professional scan tool, we noticed the data stream from the PCM was inconsistent, with fuel trim values jumping all over the place. Instead of throwing more parts at it, we swapped in a known-good, correctly programmed PCM. The van immediately idled smoothly, the transmission shifted like new, and the misfire code vanished. It’s a perfect example of how a failing PCM can mimic other mechanical problems, costing you time and money if not diagnosed correctly.
Is This the Right Part for Your 1998-1999 Express 2500 PCM?
This module is a direct replacement for a wide range of GM trucks and vans from the late 90s. It is crucial to match your part number or confirm your vehicle’s fitment. This unit, identified by part number 9366810, is also a direct replacement for service numbers 09355699, 16266645, 16250279, and 16258815. Please review the comprehensive fitment list below to ensure compatibility with your specific make, model, and engine option. If you have any doubts, don’t hesitate to contact us with your VIN, and we’ll verify the fit for you.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Misfire codes that persist even after replacing ignition components.
Simple, Secure Installation Process
Our goal is to make this repair as straightforward as possible. After placing your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will handle the programming, ensuring the module is ready to go when it arrives at your door. While installation is typically a simple plug-and-play process, some vehicles may require a security relearn procedure (often called a CASE relearn or Passlock relearn), which can be performed without special tools. Instructions for this procedure are widely available online or in service manuals.
Guaranteed Fitment For:
This module fits a wide variety of GM vehicles. Please verify your vehicle is on this list and that the service ID number matches. This part fits vehicles with service ID 09355699.
Fitment includes, but is not limited to: 1998-1999 Chevrolet & GMC C/K 1500/2500/3500 Pickups, Suburbans, Tahoes, Yukons; 1998-1999 Express & Savana 1500/2500/3500 Vans; 1999 Cadillac Escalade; 1998 Astro & Safari Vans; 1998 S10/S15/Sonoma, Blazer/Jimmy, Bravada, Envoy, and Isuzu Hombre with the 4.3L V6. Please match your ID number.
Frequently Asked Questions
Do I need to send you my old computer?
No, there is no core charge or need to send your old module to us. This is an outright purchase.
Is this computer ready to install when I receive it?
Yes! We program the computer with your vehicle’s VIN before shipping. In some cases, a simple security relearn procedure may be necessary after installation, which you can typically do yourself.
Where do I provide my VIN?
You can add your VIN in the notes section during checkout or send it to us in a message after you complete your purchase. We cannot ship the part until we have your VIN for programming.
What if my original part number is different?
This module replaces several part numbers, including 09355699, 16266645, 16250279, and 16258815. As long as your vehicle is on the compatibility list and uses one of these part numbers, this unit will work perfectly.
Is this a new part?
This is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. It has been inspected and programmed to ensure it meets or exceeds original factory performance.