Bring Your Truck Back to Life
Is your trusty GM truck starting to show its age with frustrating, hard-to-diagnose problems? A persistent check engine light, rough idling, stalling at intersections, or transmission shifts that feel harsh and unpredictable can turn a reliable workhorse into a source of daily stress. These aren’t just annoyances; they’re often the classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. It’s time to stop chasing symptoms and address the root cause. This fully programmed PCM is the definitive solution to restore the smooth, dependable performance you rely on and give you back the confidence you deserve in your vehicle.
A Mechanic’s Notebook: The Phantom Misfire
I once had a 1999 GMC Jimmy in the shop that was driving the owner crazy. It had a random misfire that no one could pin down. He’d replaced plugs, wires, the cap, the rotor—everything. The codes were intermittent and pointed everywhere. After hours of diagnostics, we scoped the injector drivers on the original PCM. We found one was intermittently failing, causing the misfire under certain loads. We installed a VIN-programmed module just like this one, and the truck ran like it just rolled off the assembly line. It’s a powerful reminder that sometimes, the problem lies in the vehicle’s central command.
Warning Signs Your PCM is Failing
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Check Engine Light: Especially for internal module codes like P0601, P0602, or P0606.
- ✔ Engine Stalling or Misfiring: Unexplained stalling, sputtering, or random misfires can point to a failing computer.
- ✔ Poor Fuel Economy: A compromised PCM can’t efficiently manage fuel delivery, leading to more trips to the pump.
- ✔ Harsh or Failed Shifting: The PCM controls transmission shift points; erratic behavior is a common symptom.
- ✔ No-Start Condition: If the engine cranks but won’t start, the PCM may not be firing the ignition coils or fuel injectors.
- ✔ Failed Emissions Test: Inability to communicate with a scan tool or incorrect fuel/air management can cause an automatic failure.
Guided Installation for a Confident Fix
Replacing your PCM is a straightforward job you can tackle with basic hand tools. Our VIN-programming service makes the process as close to plug-and-play as possible. Follow these steps to get back on the road:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the Module: On most S10/Sonoma/Blazer models, the PCM is located in the engine bay on the front right (passenger side) fender wall.
- Disconnect the Old Unit: Carefully unplug the electrical harness connectors from the old PCM. There are typically release tabs that need to be pressed or lifted.
- Swap the Modules: Unbolt the old module from its bracket and secure the new one in its place.
- Connect and Power Up: Firmly plug the harness connectors into your new 1998 S10 PCM. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle’s anti-theft system may need to be relearned. A common procedure is to turn the key to the ‘ON’ position for 10-15 minutes, then off, and repeat two more times before attempting to start the engine.
Tailored Fit for Your GM Vehicle
This module is a direct replacement for part numbers 09355699, 16250279, and 09366810. We guarantee compatibility with the following makes and models. Please verify your vehicle is on the list to ensure a perfect fit.
- 1998-1999 Chevrolet & GMC C/K 1500/2500/3500 Pickups (Gasoline Engines)
- 1998-1999 Chevrolet Suburban & Tahoe
- 1998-1999 GMC Yukon & Escalade
- 1998-1999 Chevrolet Astro & GMC Safari
- 1998-1999 Chevrolet Express & GMC Savana Vans (Gasoline Engines)
- 1998 Chevrolet S10 / GMC Sonoma / Isuzu Hombre (4.3L V6)
- 1998 Chevrolet Blazer / GMC Jimmy / Oldsmobile Bravada (4.3L V6)
- 1998 Oldsmobile Bravada & GMC Envoy
The key to a successful repair is our professional programming service. After your purchase, simply provide us with your vehicle’s VIN. We will flash the module with the latest GM-certified software updates specific to your truck, ensuring all systems function exactly as the factory intended. This critical step ensures your new 1998 S10 PCM works seamlessly with your engine, transmission, and options.
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, we will send you an email with instructions on where to reply with your VIN. You can also add it to the ‘notes’ section during checkout. We cannot ship your part until we receive this information.
Will this module require any additional programming?
No, this module comes fully programmed to your VIN. However, you will need to perform a simple ‘security relearn’ procedure after installation, which allows the module to sync with your vehicle’s anti-theft system. This procedure requires no special tools and instructions are readily available online or in your owner’s manual.
Is this a brand new part?
This is a genuine OEM component that has been meticulously inspected, tested, and restored to meet or exceed all original factory specifications. It provides the same reliability and performance as a new-from-dealer part without the excessive cost.
What if my original part number is slightly different?
This module is a direct replacement for several part numbers, including 16250279 and 09366810. As long as your vehicle is on our compatibility list, this module will function correctly once programmed to your VIN.
Will this fix my specific problem?
If your vehicle’s issues and diagnostic trouble codes (DTCs) point to a faulty PCM, this part is the correct solution. It will resolve problems directly caused by the computer. However, it will not fix underlying mechanical or electrical issues elsewhere in the vehicle.