Restore Your Vehicle’s Performance with a Reliable, Programmed PCM
Is your Chevrolet, GMC, or Isuzu truck or van running rough, stalling unexpectedly, or showing a persistent Check Engine Light? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and hard-to-diagnose issues. As the central computer for your engine and transmission, its proper function is critical. This is a dependable, OEM-salvaged PCM, part number 9366810, that offers a direct-fit, cost-effective solution to get your vehicle back in top shape.
The biggest challenge with replacing a PCM isn’t the physical installation; it’s the complex and expensive programming required. We solve that problem for you. Before we ship this module, our technicians will professionally flash it with the latest official GM software, precisely matched to your vehicle using your VIN. This means it arrives at your door ready for installation, with no need for a trip to the dealership or expensive specialty tools. This is the smart, straightforward fix you’ve been looking for.
A Technician’s Notebook: The Intermittent Stall Case
I remember a 1999 Chevy Express 2500 that came into my bay with a problem that was driving the owner crazy. It would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for 10-15 minutes. There were no consistent trouble codes, just a random U-code for lost communication every once in a while. We checked fuel pressure, ignition components, and wiring harnesses for hours. On a hunch, I tapped on the PCM housing with a screwdriver handle while the engine was idling, and it immediately stumbled. The internal processor was failing under thermal stress—a classic sign. A pre-programmed PCM like this one solved the issue in under 30 minutes, saving the customer from more diagnostic headaches and costs.
Is Your GM Truck or Van Showing These Signs?
A failing PCM can cause a wide range of symptoms. If you’re experiencing any of the following, this module is a likely solution:
- âś” Check Engine Light is on with codes like P0601, P0602, or P0606 (Internal Control Module Memory Check Sum Error).
- âś” Engine cranks but will not start.
- âś” Intermittent stalling or rough idling.
- âś” Poor fuel economy and engine performance.
- âś” Harsh or incorrect shifting from the automatic transmission.
- âś” Communication errors with scan tools.
Your Straightforward Installation Guide
Replacing your PCM is a job most DIYers can handle with basic tools. With our pre-programming service, the electronic work is already done. Just follow these steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the PCM: On most of these GM trucks and vans, the PCM is located in the engine compartment, often on the driver’s side inner fender or near the battery.
- Disconnect the Harnesses: Carefully unplug the electrical connectors from the old module. They have locking tabs that may need to be gently pried or squeezed to release.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed PCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Security Relearn: You may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s service information for the exact steps.
Verified Compatibility for Your Vehicle
This module is a direct replacement for service number 9355699 and part number 9366810, along with several other interchangeable numbers. It is guaranteed to fit the following vehicles:
CHEVROLET BLAZER S10 98
CHEVROLET 1500/2500/3500 PICKUP 98-99
CHEVROLET EXPRESS 1500/2500/3500 VAN 98-99
CHEVROLET SUBURBAN 1500/2500 98-99
CHEVROLET TAHOE 98-99
CADILLAC ESCALADE 99
GMC ENVOY 98
GMC JIMMY S15 98
GMC 1500/2500/3500 PICKUP 98-99
GMC SAFARI 98
GMC SAVANA 1500/2500/3500 VAN 98-99
GMC SONOMA S15 98
GMC YUKON 98-99
ISUZU HOMBRE 98
OLDSMOBILE BRAVADA 98
Note: Please verify your original part number or consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
How does the programming process work?
After you complete your purchase, you will need to send us your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians use this VIN to download the latest, most stable software calibration directly from GM for your specific vehicle and options. We then flash this file onto the module before shipping it.
Is this a new part?
No, this is a high-quality, genuine OEM part that has been sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped. This provides OEM reliability at a fraction of the cost of a new unit.
Will I need to do anything else after installation?
In many cases, you will need to perform a simple security relearn procedure, also known as a Passlock or VATS relearn. This procedure syncs the new PCM to your vehicle’s anti-theft system and typically involves leaving the key in the ‘ON’ position for about 10-15 minutes. Specific instructions can be easily found online for your model.
Does this PCM fit other part numbers?
Yes, this module is a direct replacement for several part numbers, including 09355699, 16266645, 9355699, 16250279, and 16258815. If your original module has any of these numbers, this part will work for you.
What if I have questions during installation?
We are committed to your success. While we cannot provide vehicle-specific diagnostic advice over the phone, we are here to answer any questions you may have about the part itself or the programming process.