Is Your Chevy Truck or GMC Van Running Rough?
If you’re dealing with a persistent check engine light, erratic engine behavior, stalling, or a no-start condition in your late-90s GM truck or van, a failing Powertrain Control Module (PCM) is often the culprit. Over time, the sensitive electronics inside these modules can degrade from heat cycles and vibration, leading to frustrating and hard-to-diagnose problems. This isn’t just an inconvenience; it affects your vehicle’s reliability, fuel economy, and emissions.
The Direct-Fit, Programmed Solution
This is a reliable, tested, and used OEM Powertrain Control Module that offers a straightforward fix. We take the guesswork and high dealership costs out of the equation. Before we ship this module to you, our experienced technicians will program it with the latest official GM software updates, specifically matched to your vehicle using the VIN you provide. This ensures that when it arrives, it’s ready to install and communicate perfectly with your truck’s systems, restoring its original performance and efficiency.
Expert Pro Tip: Check Your Connections First
In my 20+ years on the shop floor, I’ve seen countless PCMs replaced when the real issue was a simple, corroded connection. Before you install this new module, take 10 minutes to inspect and clean the main PCM connector plugs and the vehicle’s primary ground wires (especially the one from the battery to the frame and engine block). A wire brush and some dielectric grease can prevent intermittent issues and ensure your new PCM has a solid foundation to work from. This simple step has saved my customers hundreds of dollars in follow-up diagnostics.
Symptoms of a Failing 1998-1999 Chevrolet 1500 PCM
If you’re experiencing any of the following, a faulty engine computer could be the cause:
- ✔ Unexplained Check Engine Light (CEL)
- ✔ Engine stalling or randomly shutting off
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Noticeable drop in fuel mileage
- ✔ Failure to pass an emissions test
- ✔ No communication with a scan tool
- ✔ Intermittent no-start condition
Plug-and-Play Installation: No Dealer Visit Required
Getting your truck back on the road is simple. Because we program the module to your VIN before shipping, you won’t need an expensive trip to the dealership for additional programming. The security information is transferred, making the process as easy as possible for these specific vehicles.
- Safety First: Disconnect the negative battery terminal and wait a few minutes for the system to discharge.
- Locate the PCM: On most trucks and vans like the Chevrolet 1500 or Express Van, the PCM is located in the engine compartment, typically on the driver’s side fender or firewall.
- Disconnect the Old Module: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released.
- Swap the Modules: Unbolt the old PCM and secure the new, pre-programmed module in its place.
- Reconnect and Finalize: Plug the wiring harnesses firmly into the new PCM until they click. Reconnect the negative battery terminal. Your vehicle is ready to start.
Guaranteed Compatibility
This module is a direct replacement for several part numbers. Please verify that your original module has one of the following numbers printed on its label to ensure perfect compatibility:
Part Numbers: 09355699, 16266645, 16250279, 16258815, 09366810, 9366810
IMPORTANT: After your purchase, please send us a message with your vehicle’s 17-digit VIN. We cannot ship your order until we have this information to complete the necessary programming.