Is Your Truck or Van Running Rough? Get It Back in Top Shape.
If you’re dealing with a persistent check engine light, erratic engine behavior, poor fuel mileage, or a vehicle that just won’t start, a failing Powertrain Control Module (PCM) is often the culprit. For countless 1998-1999 GM trucks, vans, and SUVs, the PCM is the central brain, and when it malfunctions, it can cause a cascade of frustrating issues. This isn’t just an inconvenience; it’s a problem that affects your vehicle’s reliability and performance. We offer a straightforward, dependable solution to get you back on the road with confidence.
Common Symptoms & Your Solution
A faulty engine computer can manifest in many ways. You might be experiencing one or more of the following:
- Engine stumbling, misfiring, or stalling
- Harsh or incorrect automatic transmission shifting
- A no-start condition where the engine cranks but won’t fire up
- Significantly reduced fuel economy
- Check Engine Light with diagnostic trouble codes (DTCs) like P0601, P0602, or P0605
- Failure to pass an emissions or smog test
This programmed 09355699 PCM is the definitive solution to these problems. We take a tested, reliable computer from a salvaged vehicle and flash it with the latest official GM software, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This ensures perfect compatibility and function, right out of the box.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with your specific VIN before shipping, ensuring it communicates perfectly with your truck’s systems. No expensive trips to the dealer for programming.
- ✔ Updated GM Software: Your PCM will be loaded with the newest software updates from General Motors, which can improve idle quality, transmission shifting, and overall drivability.
- ✔ Plug-and-Play Design: Once you receive the unit, installation is as simple as disconnecting the battery, swapping the modules, and reconnecting. In most cases, you’re ready to go. (Note: A security relearn procedure may be required, which is a simple process you can do yourself).
- ✔ Cost-Effective Repair: Get a fully functional, programmed computer for a fraction of the cost of a new unit from a dealership.
- ✔ Wide Compatibility: This module is a direct replacement for multiple part numbers, including 16266645, 9355699, 16250279, and more, covering a vast range of popular GM models.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Insight: Why Pre-Programmed is the Only Way to Go
As a technician with over two decades of experience, I’ve seen countless DIYers and even professional shops get stuck with a blank PCM. They install it, and the vehicle still won’t start. Why? Because without the correct VIN-specific software, the module can’t talk to the anti-theft system, the transmission, or the instrument cluster. Sourcing a used programmed 09355699 PCM that is already flashed to your vehicle saves you from this headache. It turns a potentially complex electronic repair into a simple component swap, saving you time, money, and the frustration of a vehicle that’s stuck in your driveway.
Frequently Asked Questions
How does the programming process work?
It’s simple. After you place your order, you’ll need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the correct, updated GM software for your exact make, model, and options. We then flash this software onto the PCM before it’s shipped to you.
Will I need to do anything after installing it?
After installing the PCM, you may need to perform a simple security relearn procedure, also known as the Passlock or VATS relearn. This process syncs the new computer with your vehicle’s anti-theft system and typically involves turning the key on and off in a specific sequence. Instructions are widely available online for your specific model.
How do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a guaranteed fix for my vehicle’s problems?
While this programmed 09355699 PCM is the correct solution for a faulty computer, it’s crucial to ensure your vehicle has been properly diagnosed. This part will not fix issues caused by faulty sensors, bad wiring, or mechanical problems. We recommend a thorough diagnosis before ordering.
What if I order the wrong part?
Please use the detailed fitment list on this page and match your original part number to the list provided (09355699, 16266645, etc.). Providing us with your VIN for programming is the best way to ensure you receive the correct, compatible computer for your vehicle.