Is Your GM Truck or Van Suddenly Unreliable?
There’s nothing more frustrating than a trusty workhorse that won’t start, idles rough, or throws confusing check engine lights. If your 1998-1999 GM vehicle is stalling, shifting erratically, or failing to communicate with a scan tool, the problem often points directly to a failing Powertrain Control Module (PCM). Don’t let a faulty computer keep you sidelined. This is the straightforward, reliable solution to get your vehicle back in service and running strong.
Common Symptoms & Your Solution
A failing PCM can cause a host of issues that can be easily misdiagnosed, costing you time and money on parts you don’t need. If you’re experiencing any of the following, this pre-programmed engine computer is your definitive fix:
- Complete no-start or intermittent starting condition
- Rough idle, stalling, or poor engine performance
- Drastically reduced fuel economy
- Harsh or erratic automatic transmission shifting
- Check Engine Light with communication-related DTCs (e.g., P0601, P0605)
- Multiple unrelated sensor codes appearing at once
This Programmed 16250279 PCM is the central command unit for your engine and transmission. We take a tested, reliable OEM computer and flash it with the latest official GM software calibrated specifically to your vehicle’s VIN. This ensures it works seamlessly with your existing components, right out of the box.
Features & Tangible Benefits
- ✔ VIN-Programmed for You: We flash this module with the latest GM software updates specific to your vehicle’s VIN, ensuring perfect compatibility and optimal performance.
- ✔ Cost-Effective Solution: Get a genuine, tested OEM computer at a fraction of the cost of a new unit from the dealer, without sacrificing reliability.
- ✔ Simple Installation: This unit arrives ready to install. In most cases, you can simply plug it in and perform a standard security relearn procedure, getting you back on the road faster.
- ✔ Solves Frustrating Issues: Directly addresses the root cause of many hard-to-diagnose electrical and performance problems, saving you from replacing unnecessary sensors.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Diagnosis
As a technician for over two decades, I’ve seen countless people waste hundreds of dollars chasing ghosts. They replace a throttle position sensor, then a crankshaft sensor, then an O2 sensor, all because the codes point that way. The real culprit? A failing driver circuit inside the original PCM. This Programmed 16250279 PCM isn’t just a part; it’s the correct diagnosis for a complex problem, saving you from that frustrating and expensive cycle of guesswork.
Frequently Asked Questions
Do I need to program this computer after I receive it?
No. We program the computer to the VIN you provide before we ship it. It arrives ready for installation. However, you will likely need to perform a security relearn procedure (often called a Passlock or VATS relearn) so the vehicle recognizes the new PCM. This procedure is simple and can typically be done without special tools.
How do I give you my vehicle’s VIN?
After you complete your purchase, you will need to send us a message with 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 this a new computer?
No, this is a high-quality, used OEM computer that has been sourced from a salvaged vehicle. Each unit is thoroughly inspected and tested to ensure it is fully functional before being programmed and shipped.
What makes this better than a regular junkyard PCM?
A standard junkyard part will not be programmed for your specific vehicle and will not have the latest software updates. Our service includes flashing the unit with your exact VIN and the newest GM calibration, which is critical for proper engine, transmission, and emissions performance. This critical step is already done for you.
What if the part number on my old PCM is slightly different?
This computer is a direct replacement for several part numbers, including 09355699, 16266645, and others listed in the fitment guide. As long as your vehicle is on the compatibility list, this Programmed 16250279 PCM will function correctly as it is the proper hardware for your application.