Is Your GM Truck or Van Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic shifting, a no-start condition, or poor fuel economy in your 1998-1999 GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. This computer is the brain of your engine and transmission, and when it fails, it can cause a host of problems that leave you stranded. Don’t let a faulty computer keep your dependable truck off the road. This fully programmed PCM is the straightforward, reliable solution to get you back in business.
Common Symptoms & Your Solution
A failing PCM can manifest in many ways. You might be experiencing one or more of the following:
- Check Engine Light: Often with communication error codes like P0601, P0605, or P0606.
- No Start or Stalling: The engine cranks but won’t start, or it stalls unexpectedly while driving.
- Harsh Transmission Shifting: The transmission may slam into gear or refuse to shift correctly.
- Poor Engine Performance: Noticeable loss of power, rough idling, or a sudden drop in gas mileage.
- Communication Issues: Your scan tool may be unable to communicate with the PCM.
This Programmed 16258815 PCM is the definitive fix for these issues. We take a genuine, used OEM computer and flash it with the latest official GM software updates, specifically matched to your vehicle’s unique VIN. This ensures it works seamlessly with your engine, transmission, and all related systems right out of the box.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: Arrives ready for a plug-and-play installation. No expensive trips to the dealership for programming are required.
- ✔ Loaded with Latest GM Updates: We flash the module with the most current software from General Motors, which can resolve factory bugs and improve drivability.
- ✔ Restored Performance & Reliability: Fixes common running issues, restores proper shift patterns, and brings back the dependable performance you expect from your truck.
- ✔ Cost-Effective Solution: Get the proven reliability of an original factory part without the high cost of a new computer from the dealer.
- ✔ This unit is backed by our one-year replacement warranty.: Drive with confidence knowing your purchase is protected.
Expert Insight: The Key is in the Programming
On these late-90s GM trucks, proper programming isn’t just a suggestion—it’s essential. The PCM communicates with everything, including the anti-theft system (Passlock/VATS). An incorrectly programmed module can lead to a no-start condition that can be incredibly difficult to diagnose. By providing us with your VIN, we ensure the security information matches perfectly, allowing for a smooth installation. This isn’t just about loading a file; it’s about making sure the new brain communicates perfectly with the heart of your truck.
Getting your truck, van, or SUV back to peak condition is simple. Just provide your vehicle’s VIN at checkout, and we’ll handle the complex programming. You’ll receive a reliable, ready-to-install Programmed 16258815 PCM that solves your problems and gets you back on the road with confidence.
Frequently Asked Questions
What exactly is a PCM?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission function, including fuel injection, ignition timing, emissions systems, and automatic transmission shift points to ensure optimal performance and efficiency.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is specific to your vehicle.
Is any other programming needed after I install it?
In most cases, no. This PCM comes pre-programmed and is ready to be installed. However, some vehicles may require a simple security relearn procedure, which can be done without any special tools and typically takes 10-30 minutes. Instructions are readily available online for this process.
This is a used part. How can I be sure it’s reliable?
Each computer is sourced from a salvaged vehicle and is thoroughly inspected and tested to ensure it is fully functional before being programmed and shipped. We use genuine OEM parts because of their proven durability and compatibility, and we back it up with a solid warranty.
Will this fix my specific problem?
While this Programmed 16258815 PCM is the correct solution for the symptoms listed, proper vehicle diagnostics are always recommended. Please ensure a qualified mechanic has diagnosed the PCM as the point of failure before ordering to avoid unnecessary returns.
What if my original part number is different?
This computer is a direct replacement for all part numbers listed in the description, including 09355699, 16266645, and more. As long as your vehicle is listed in the compatibility chart, this module will function correctly once programmed to your VIN.