Is Your GM Truck or Van Running Rough?
If your 1998-1999 Chevrolet 3500 is suffering from a persistent check engine light, erratic engine behavior, a no-start condition, or has failed an emissions test, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer, the PCM controls everything from fuel mixture and ignition timing to transmission shift points. When it fails, it can cause a cascade of frustrating and hard-to-diagnose issues.
In my 20+ years as a technician, I’ve seen countless customers replace expensive sensors and parts, only to find the root problem was the PCM itself. A classic case was a ’99 Chevy 2500 that came into my shop with what the owner thought was a bad transmission. It was shifting hard and erratically. After checking the basics, my scan tool pointed to faulty communication with the PCM. A replacement module, programmed correctly, had the truck shifting like new in under an hour. This is the simple, effective solution we offer.
The Direct Solution: A VIN-Programmed PCM
This is a reliable, used OEM Powertrain Control Module that has been meticulously tested and is ready for installation. The best part? We handle the programming for you. Forget about towing your vehicle to a dealership and paying high fees for programming. Simply provide us with your vehicle’s VIN during checkout, and we will flash the module with the latest GM-certified software specifically for your truck. It arrives at your door ready to install.
- โ VIN Programmed: Arrives ready to install with the latest GM software for your specific vehicle.
- โ Solves Common Issues: Corrects problems like rough idle, stalling, poor fuel economy, and false sensor codes.
- โ No Dealer Required: Save hundreds of dollars by avoiding expensive dealership programming and labor fees.
- โ Guaranteed Compatibility: This module is a direct replacement for part numbers 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810.
Easy Installation for Your 1998-1999 Chevrolet 3500 PCM
Replacing the PCM on these GM trucks is a straightforward job that most DIY mechanics can handle in their own driveway. Follow these simple steps to get your truck back in top shape.
Expert Pro Tip: Clean Your Connections!
Before you plug in your new PCM, take a moment to inspect and clean the main harness connectors. Over the years, dirt, oil, and moisture can build up, causing poor contact and intermittent issues that mimic PCM failure. Use a quality electronics cleaner and a small nylon brush to gently scrub the pins and sockets. A clean connection is critical for proper function and longevity.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most 1998-1999 GM trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side inner fender or near the battery.
- Disconnect the Harnesses: Carefully unclip and remove the electrical connectors from the old PCM. There are usually several color-coded connectors with locking tabs.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. It’s typically held in place by two or three bolts.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- Reconnect Everything: Plug the electrical harnesses firmly into the new PCM, ensuring each connector clicks into place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): In some cases, a simple security relearn procedure is needed. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s service manual will have the exact steps if required.
Don’t let a bad computer keep your reliable GM truck off the road. This VIN-programmed PCM is the most efficient and cost-effective way to restore your vehicle’s performance and reliability. Order today and get back to work.