Get Your GM Truck or Van Back on the Road, Fast.
There’s nothing more frustrating than when your dependable GM workhorse starts acting up. Whether it’s a hard start, erratic shifting, or a persistent Check Engine Light, a failing Powertrain Control Module (PCM) can bring your vehicle—and your work—to a grinding halt. This isn’t just an inconvenience; it’s downtime that costs you time and money. This replacement engine computer is the straightforward, reliable solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty PCM is the likely culprit. This unit is the definitive solution for symptoms such as:
- Harsh or erratic automatic transmission shifting
- Engine stalling, stumbling, or poor idle quality
- Complete no-start condition where the engine cranks but won’t fire
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0604, or P0605
- Poor fuel economy and loss of power
Instead of wrestling with a trip to the dealership, our process is simple. We ship you a fully Programmed 09355699 PCM flashed specifically for your vehicle. You provide your VIN, we handle the complex programming, and you receive a part that’s ready for installation right out of the box.
Features & Tangible Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM calibrations for your exact vehicle. This means no expensive dealer trips for programming—it’s a true plug-and-play solution.
- ✔ Restored Engine & Transmission Performance: By installing a correctly functioning computer, you’ll restore crisp shifting, a stable idle, and the original power your vehicle was built to deliver.
- ✔ Genuine OEM Reliability: This is a used, original equipment part. It was designed by GM for your truck or van, ensuring perfect communication with all other vehicle modules and sensors.
- ✔ Simple Installation: Designed as a direct-fit replacement, this PCM installs using the factory mounting points and connectors, making the swap straightforward for a DIYer or professional mechanic.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty. Drive with the confidence that your purchase is protected.
Expert Insight: The ‘Black Box’ Vortec Solution
As a technician, I’ve seen countless hours wasted on diagnosing these late-90s GM ‘black box’ PCMs. They are incredibly robust, but when they fail, they can create phantom issues that are a nightmare to trace. The biggest hurdle has always been the programming. Before services like ours, your only option was a costly new part and a trip to the dealer. This Programmed 09355699 PCM changes the game. It allows you to bypass the dealer entirely, saving hundreds of dollars and significant downtime. It’s the most efficient way to get that legendary Vortec engine running right again.
Frequently Asked Questions
What do I need to do after I place my order?
After you complete your purchase, you must send us your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot program and ship your PCM without it. You can typically add this as a note during checkout or send it to us in a message referencing your order number.
Will I need to perform any other procedures after installation?
Yes, on most of these GM vehicles, you will need to perform a Security Relearn Procedure (also known as a Passlock or VATS relearn) after installing the new PCM. This is a simple process that typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the PCM to sync with your vehicle’s anti-theft system. Instructions are widely available online for your specific model.
How can I be sure my original PCM is faulty?
While the symptoms listed above are strong indicators, the best way is through professional diagnosis. However, common signs include a no-communication error with a professional scan tool, internal memory codes (like P0601), or having ruled out all other possible causes for your running issues (e.g., fuel pump, ignition system).
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.
Does this part number have to match mine exactly?
This Programmed 09355699 PCM is a direct replacement for several service numbers, including 16266645, 16250279, and others listed in the description. As long as your vehicle is on the compatibility list, this unit will work perfectly once programmed to your VIN.