Is Your GM Truck or SUV Experiencing Engine Troubles?
If your 1998 Oldsmobile Bravada, Chevrolet S10, GMC Jimmy, or another compatible GM vehicle is suffering from erratic behavior like stalling, no-start conditions, a persistent check engine light, or poor fuel economy, a failing Powertrain Control Module (PCM) could be the culprit. The PCM is the central computer of your vehicle’s engine management system, responsible for controlling everything from fuel injection and ignition timing to transmission shifting and emissions. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems.
The Direct Solution: A VIN-Programmed 1998 Bravada PCM
Don’t let a faulty computer keep your reliable GM truck off the road. This is a tested, genuine OEM Powertrain Control Module (part number 9366810) that offers a direct-fit, reliable solution. The most critical part of the replacement process is programming, and we handle that for you. Before we ship the module, we will flash it with the latest GM-certified software updates specifically for your vehicle using the Vehicle Identification Number (VIN) you provide. This ensures that the computer communicates perfectly with all the other modules and sensors in your truck, restoring its original performance and efficiency.
From the Diagnostic Bay
We had a 1999 Chevy Tahoe come into the shop with a classic complaint: intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the throttle position sensor and the idle air control valve based on some forum advice, but the problem persisted. After hooking up our professional scan tool, we noticed communication dropouts with the PCM. Instead of throwing more parts at it, we tested the circuits and confirmed the PCM itself was failing internally. A replacement, VIN-programmed module like this one had the Tahoe running perfectly in under an hour. It’s a reminder that sometimes the root cause is the brain, not the sensors it’s reading.
Common Symptoms of a Failing GM PCM
- ✔ Check Engine Light is on with communication-related trouble codes (e.g., U-codes) or multiple, unrelated sensor codes.
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained stalling or rough idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test.
- ✔ Intermittent electrical issues that seem to have no cause.
Simple Installation Process
Replacing the PCM is a straightforward process. Once you receive your pre-programmed module, simply disconnect the vehicle’s battery, locate the old PCM (typically in the engine bay), unplug the electrical connectors, unbolt it, and swap in the replacement. After reconnecting everything, you may need to perform a simple security relearn procedure (often called a Passlock or VATS relearn), which can typically be done without special tools. This procedure syncs the new computer with your vehicle’s anti-theft system. Instructions for this are widely available online for your specific model.
This module is a direct replacement for multiple part numbers, including 09355699, 16266645, 16250279, 16258815, and 09366810. It fits a wide range of 1998-1999 GM trucks, vans, and SUVs. Please verify your part number and consult the detailed fitment list to ensure compatibility with your specific vehicle.
Frequently Asked Questions
What exactly is a PCM?
The Powertrain Control Module (PCM), also known as the Engine Control Module (ECM), is your vehicle’s main computer. It controls all aspects of engine and transmission function to ensure optimal performance, fuel economy, and emissions.
How do I provide my vehicle’s VIN?
After you complete your purchase, you can add your VIN to the order notes or send it to us via message. We cannot ship your part until we receive the VIN, as the programming is specific to your vehicle.
Is any additional programming required after installation?
No, this PCM comes fully programmed to your VIN with the latest GM software. However, you will likely need to perform a security relearn procedure to sync the module with your vehicle’s anti-theft system. This can usually be done at home without any special tools.
Is this a new part?
This is a high-quality, used OEM part sourced from a salvaged vehicle. Each unit is thoroughly inspected and tested to ensure it is fully functional before being programmed and shipped.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, this part will resolve the issue. However, it’s crucial to properly diagnose your vehicle, as the light could be on for other reasons, such as a bad sensor or wiring issue.