Restore Your Truck’s Brain, Restore Your Peace of Mind
Is your trusty GM truck or van suddenly running rough, stalling, or refusing to start? Are you chasing frustrating Check Engine Lights that point to a dozen different sensors? Before you spend another weekend replacing parts, the root cause might be a failing Powertrain Control Module (PCM). This pre-programmed 09355699 PCM is the definitive, hassle-free solution to get your vehicle back on the road, running exactly as it should.
Common Symptoms & Your Solution
A faulty PCM can create a cascade of confusing issues. If you’re experiencing any of the following, a failing engine computer is the likely culprit:
- No-Start or Hard-Start: The engine cranks but won’t fire up, or takes an excessively long time to start.
- Rough Idle & Stalling: Your vehicle idles erratically or stalls unexpectedly at stops.
- Poor Performance & Fuel Economy: A noticeable loss of power, hesitation during acceleration, and a sudden drop in MPG.
- Check Engine Light (CEL): Persistent CEL with codes related to multiple sensors, internal computer failure (P0600-P0606), or communication errors.
- Erratic Shifting: The automatic transmission may shift harshly, late, or not at all, as the PCM controls its functions.
This module is your direct solution. We take a reliable, tested OEM unit and flash it with the latest GM-certified software, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This ensures all systems—engine, transmission, and emissions—communicate and operate according to factory specifications.
Features & Real-World Benefits
- ✔ VIN-Programmed for You: We flash the computer to your specific VIN before shipping. This means no expensive programming tools or trips to the dealership are required. It’s ready to install right out of the box.
- ✔ Plug & Play Installation: Simply disconnect the battery, swap the old module with this one, and reconnect the battery. In most cases, a simple security relearn procedure is all that’s needed to get you running again.
- ✔ Updated GM Software: Your module comes loaded with the newest software updates from General Motors, addressing common factory bugs and improving performance and efficiency.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for part numbers 09355699, 16266645, 16250279, 16258815, and 09366810, ensuring a perfect fit for a wide range of GM trucks and vans.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on GM Security Systems: Many owners of these late-90s GM trucks get stuck after swapping a computer because of the Passlock or VATS security system. The vehicle won’t start because the new computer isn’t matched. Our VIN programming process correctly prepares the module to sync with your vehicle, dramatically simplifying the security relearn procedure. We eliminate the biggest headache associated with this repair, saving you time, money, and the frustration of a no-start condition after the part is installed. This is the key to a successful DIY repair.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
After installing the module, you will need to perform a simple security relearn procedure, often called a “Passlock Relearn.” This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating the cycle three times. This allows the new PCM to sync with your vehicle’s anti-theft system. Instructions are readily available online for your specific model.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send us a message directly after your order. We cannot ship your part until we receive your VIN, as the programming is essential.
Is this a new computer?
No, this is a high-quality, used OEM computer sourced from a salvaged vehicle. Each unit is thoroughly inspected and tested to ensure it is fully functional before being programmed and shipped to you.
How can I be sure my old PCM is the problem?
While the symptoms listed above are strong indicators, it’s always best to have a professional diagnosis. However, if you’ve ruled out common issues like bad sensors or wiring and are experiencing multiple, unrelated error codes, the PCM is the most likely cause. A key sign is a loss of communication with a scan tool.
Will this programmed 09355699 PCM fix my transmission shifting issues?
In many cases, yes. The PCM (or ECU) controls both engine and transmission functions on these vehicles. If your shifting problems are electronic and not mechanical, a properly functioning and programmed PCM is critical to restoring smooth and correct gear changes.
My original part number isn’t 09355699, but it’s on the fitment list. Will this work?
Absolutely. The part numbers listed (like 16266645, 16250279, etc.) are all interchangeable hardware. The critical factor is the correct VIN programming, which we handle. As long as your vehicle is on the compatibility list, this module will function correctly as a replacement.