Is your 1998-1999 GM truck or van running poorly, stalling, or showing a persistent check engine light?
You’re not alone. The Powertrain Control Module (PCM), the electronic brain of your vehicle, is a common point of failure on these workhorse vehicles. When it starts to fail, it can cause a cascade of frustrating and difficult-to-diagnose issues, from rough idling and poor fuel economy to a complete no-start condition. Don’t waste time and money replacing sensors when the root cause is the computer itself. This is your direct-fit, reliable solution.
This isn’t just a used part pulled from a yard. This is a complete, ready-to-install solution. We take a genuine, tested OEM PCM and program it specifically for your vehicle using your unique Vehicle Identification Number (VIN). It arrives at your door flashed with the latest official GM software updates, which often correct factory bugs and improve performance and longevity. This means no expensive trips to the dealership for programming – just plug it in and get back on the road.
Diagnosing a Faulty 1998-1999 Savana PCM
A failing computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a bad PCM is a likely culprit. This replacement unit is designed to resolve these exact problems and restore your vehicle’s factory operation.
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling or cutting out unexpectedly
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel mileage
- ✔ Harsh or incorrect transmission shifting
- ✔ No-start condition where the engine cranks but won’t fire
- ✔ Communication errors with diagnostic scan tools
- ✔ Unexplained electrical or sensor-related fault codes
This unit is a direct replacement for multiple part numbers, including 09355699, 16266645, 16250279, 16258815, and 09366810. By providing your VIN, you guarantee that the software loaded onto this module is the perfect match for your vehicle’s specific options and configuration.
Simple Installation Process
Once you receive your pre-programmed module, the installation is straightforward. Simply disconnect the battery, locate your old PCM (typically in the engine compartment), unplug the electrical connectors, unbolt it, and swap in the new one. After reconnecting the battery, you may need to perform a simple security relearn procedure (often called a Passlock or VATS relearn), which can typically be done without special tools and takes about 30 minutes. Instructions are widely available online for this procedure.
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we flash the computer with the specific software and calibration file that matches your vehicle’s VIN. This ensures all systems, from the engine and transmission to the anti-lock brakes, function exactly as the manufacturer intended. It makes the installation plug-and-play without needing a trip to the dealer.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is the most critical step.
Is this a new part?
This is a high-quality, used OEM part sourced from a salvaged vehicle. Each unit is thoroughly inspected and tested before being programmed and shipped. This provides OEM reliability at a fraction of the cost of a new module.
Will I need to do anything after I install it?
In most cases for these GM vehicles, you will need to perform a security relearn procedure. This syncs the new PCM with your vehicle’s anti-theft system. It’s a simple process that involves turning the key on and off in a specific sequence.
Does this fit vehicles other than the Savana 3500?
Yes, this PCM fits a very wide range of 1998-1999 GM trucks, vans, and SUVs, including the Chevy Express, Suburban, Tahoe, C/K Pickups, GMC Yukon, and more. Please check the detailed fitment list on this page to confirm compatibility.