Is Your GM Truck or Van Plagued with Issues?
If your 1998-1999 Savana, Express, or GM pickup is suddenly running rough, refusing to start, or throwing a cascade of confusing check engine light codes, the Powertrain Control Module (PCM) is often the culprit. Over my 20+ years turning wrenches, I’ve seen countless owners replace perfectly good fuel pumps and sensors, only to find the problem was the vehicle’s computer all along. A failing PCM can cause unpredictable and frustrating symptoms that can leave even seasoned mechanics scratching their heads.
A Story From The Shop…
“A customer’s ’99 Express 3500 work van came in on a tow truck last month. It would crank but not start. The owner had already replaced the fuel pump and filter himself, but nothing changed. His scanner was showing a loss of communication code. After verifying power and ground at the PCM connectorโa critical first stepโwe swapped in one of our tested units. The van fired up on the first try. His original PCM had an internal failure that was preventing the fuel pump relay from activating. This pre-programmed module saved him another expensive, incorrect repair and got his business back on the road.”
The Direct Solution for Your Vehicle
This is a reliable, tested, and pre-programmed PCM that directly replaces part number 9366810 and other interchangeable service numbers. We take the guesswork and high cost out of the repair. Simply provide us with your vehicle’s VIN after purchase, and we will flash the module with the latest GM software calibration for your exact vehicle. This ensures all systemsโengine, transmission, and emissionsโfunction exactly as the factory intended.
- โ Fix Common Problems: A direct solution for no-start conditions, harsh shifting, false sensor codes, and intermittent stalling.
- โ VIN-Programmed for You: We program the module to your specific VIN, ensuring it’s ready for installation right out of the box.
- โ Cost-Effective Repair: Get a reliable, tested OEM part without the high price tag of a new dealership module.
- โ Wide Compatibility: This module, identified by service ID 9355699, fits a huge range of GM trucks and vans from this era.
Easy, Plug-and-Play Installation
You don’t need a trip to the dealership or specialized tools. Installing your replacement 1998-1999 Savana 2500 PCM is a straightforward job you can do in your own driveway.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most of these vans and trucks, the PCM is located in the engine compartment, typically on the driver’s side fender well or near the battery.
- Disconnect the Connectors: Carefully unlatch and remove the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage.
- Swap the Module: Unbolt the old PCM and secure the new one in its place.
- Reconnect Everything: Firmly plug the wiring harnesses into your new PCM until they click into place. Reconnect the negative battery terminal.
- Security Relearn: In some cases, you may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s service manual will have the exact steps.
Guaranteed Fitment for Your GM Vehicle
This module is the correct replacement for a wide variety of 1998-1999 GM models that use service ID 9355699. It is a direct replacement for part numbers 09355699, 16266645, 16250279, 16258815, and 9366810. Whether you have a Chevy Express, GMC Savana, Tahoe, Suburban, or a C/K Pickup, this is the reliable brain your vehicle needs to run smoothly again.