Is Your 1998-1999 GM Truck or Van Running Poorly?
If you’re dealing with frustrating issues like stalling, rough idling, a persistent check engine light, or a no-start condition in your Chevrolet Express, GMC Savana, Tahoe, or Suburban, the root cause is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shifting. When it starts to fail, it can create a cascade of problems that are difficult to diagnose and can leave you stranded.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We offer a reliable, used OEM Powertrain Control Module that has been meticulously tested and programmed specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after your purchase, and our technicians will flash the module with the latest official GM software updates. This ensures that your vehicle’s computer is operating with the most current data for optimal performance, fuel efficiency, and emissions control, eliminating the need for an expensive trip to the dealership.
From the Diagnostic Bay
We had a 1999 Suburban come into the shop that had its owner pulling his hair out. The vehicle would randomly stall at stoplights and had a check engine light for an obscure sensor circuit. The owner had already replaced the sensor twice, along with the spark plugs and wires, with no luck. After hooking up our diagnostic scanner, we noticed erratic data coming from the PCM. We swapped in one of our VIN-programmed modules, performed the quick security relearn, and the truck immediately ran like new. The stalling vanished, and the check engine light stayed off. It’s a classic case where the problem wasn’t the sensor, but the computer interpreting the sensor’s data.
Symptoms of a Failing PCM
- ✔ Check Engine Light is illuminated with various trouble codes.
- ✔ Engine stalling or cutting out unexpectedly while driving.
- ✔ Rough or erratic idling.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass an emissions test.
Why Choose Our Pre-Programmed 1998-1999 Express PCM?
Getting your vehicle back on the road shouldn’t be a complicated or expensive ordeal. Our process is designed to be simple and effective. The 1998-1999 Express PCM you receive is a genuine OEM part sourced from a salvaged vehicle, ensuring perfect fitment and communication with your vehicle’s other modules. By programming it to your VIN, we tailor it to your specific engine, transmission, and factory options. This plug-and-play approach saves you the hassle and cost of dealer programming fees and lengthy service appointments.
This module is a direct replacement for a wide range of GM part numbers, including 09355699, 16266645, 16250279, 16258815, and 09366810. It fits dozens of models from Chevrolet, GMC, Cadillac, and Isuzu, making it a versatile solution for many popular trucks, vans, and SUVs from this era. Please verify your part number and consult the detailed fitment list to ensure compatibility.
Installation and Setup
Installation is straightforward for a DIY mechanic or any professional technician. After physically installing the module, you may need to perform a security relearn procedure (also known as a CASE learn) to sync the new computer with your vehicle’s anti-theft system. This procedure is simple and can typically be done without special tools. We are happy to provide instructions for this process upon request. Restoring the heart of your vehicle’s electronics with a quality, pre-programmed 1998-1999 Express PCM is the most reliable way to solve complex engine management issues and ensure your vehicle runs smoothly for years to come.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, please send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. The VIN is typically found on your driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Is this a plug-and-play part?
Yes, for the most part. We program the module to your VIN so it has the correct software for your engine and transmission. However, on many GM vehicles of this era, you will need to perform a security relearn procedure to sync the computer with your keys and anti-theft system. This is a simple procedure that we can provide instructions for.
Are these new computers?
No, these are used OEM computers that have been sourced from salvaged vehicles. Each unit is thoroughly inspected and tested to ensure it is fully functional before being programmed and shipped to you.
What if my part number isn’t listed but my vehicle is?
The primary ID number for this group of computers is 09355699 or 9355699. This module replaces many other part numbers. As long as your vehicle is on the compatibility list and your original module looks identical, this computer will work once programmed to your VIN.
What is the warranty on this part?
We stand by our products. This PCM comes with a standard warranty that covers defects in the module itself. Please refer to the warranty section of the listing for specific terms and duration. Proper diagnosis and installation are key to the longevity of the part.