Is Your Chevy Truck or GM Van Running Rough, Stalling, or Refusing to Start?
If you’re dealing with frustrating engine problems like a persistent check engine light, erratic idling, poor fuel mileage, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As a mechanic with over two decades of experience under the hood of these GM trucks, I’ve seen these exact symptoms hundreds of times. The PCM is the brain of your vehicle, and when it starts to fail, it can cause a cascade of issues that can be difficult to diagnose. This isn’t just a part; it’s the command center for your engine’s performance and reliability.
The Simple, Reliable Solution: A VIN-Programmed PCM
Forget expensive dealership visits and the hassle of finding a local shop that can program modules for older vehicles. We offer a straightforward solution. This is a genuine, road-tested used OEM PCM that we will professionally program to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that all the factory settings for your engine, transmission, and options are loaded correctly, making the installation process as simple as possible.
Expert Pro Tip from a 20-Year Veteran Mechanic
Before you install your new PCM, take five minutes to inspect and clean the main engine-to-chassis ground strap. On these GMT400 platform trucks, a corroded or loose ground is the number one cause of fried electronics. A poor ground creates electrical resistance, which can cause voltage spikes that damage sensitive components inside the PCM. A quick check with a wire brush can save you from a repeat failure and is the cheapest insurance you can get for your repair.
Why Choose Our 1998-1999 Chevrolet 2500 PCM?
When you buy from us, you’re not just getting a part; you’re getting a fully prepared component ready to solve your problem. We handle the complex part so you can get back on the road.
- โ VIN Programmed for Your Truck: We flash the module with the latest GM software updates using your VIN. This is critical for proper communication with your vehicle’s anti-theft system (Passlock/VATS) and other modules.
- โ Cost-Effective Repair: Get a reliable, tested OEM part that’s been programmed for a fraction of the cost of a new module and dealer programming.
- โ Plug-and-Play Potential: Because we program it beforehand, in many cases this becomes a simple swap. No special tools or dealer appointments are required for the programming itself.
- โ Fixes Common Issues: This is the solution for a wide range of problems including harsh shifting, false sensor codes, and intermittent stalling.
Plug-and-Play Installation: No Dealer Visit Required
Installing your programmed PCM is a job most DIYers can handle in their own driveway. Follow these general steps to get your truck running right:
- Safety First: Disconnect the negative battery terminal and wait at least 15 minutes to allow all capacitors to discharge.
- Locate the PCM: On most 1998-1999 Chevrolet 2500 trucks, the PCM is located in the engine compartment on the driver’s side, near the fender or firewall. It’s a black box with several large electrical connectors.
- Disconnect the Connectors: Carefully unclip and remove the wiring harness connectors from the old PCM. Inspect the pins for any corrosion or damage.
- Swap the Module: Unbolt the old PCM from its mounting bracket and install the new, programmed module in its place.
- Reconnect Everything: Securely plug the wiring harnesses into the new PCM until they click. Reconnect your negative battery terminal.
- Security Relearn Procedure: After installation, you may need to perform a simple 10-30 minute key-cycle security relearn procedure to sync the new PCM with your truck’s anti-theft system. This procedure can easily be found online and requires no special tools.
This module is a direct replacement for several part numbers, including 09355699, 16266645, 16250279, 16258815, and 9366810. By providing your VIN, you guarantee we will send you a physically compatible and correctly programmed computer for your exact vehicle configuration. Take the guesswork out of your repair and order with confidence.