Restore Peak Performance to Your GM Truck or Van
Is your late-90s Chevrolet, GMC, or Isuzu truck suffering from frustrating issues like poor idling, stalling, erratic shifting, or a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission. A faulty PCM can cripple your vehicle’s reliability and performance. This direct-fit replacement module, part number 16250279, is the definitive solution to get your dependable workhorse running like new again.
Unlike generic modules that require expensive trips to the dealership for programming, this unit arrives at your door fully programmed to your specific vehicle. We use your Vehicle Identification Number (VIN) to load the latest, most stable software updates directly from GM. This ensures perfect compatibility and can often resolve underlying drivability issues that were present even from the factory. This is not just a replacement part; it’s a comprehensive solution to restore your vehicle’s brain to optimal condition.
From the Diagnostic Bay
We had a 1999 GMC Sierra 1500 come into the shop with a complaint of harsh, unpredictable shifting and a random engine stall at red lights. The owner had already replaced the throttle position sensor and the mass airflow sensor, spending hundreds with no improvement. After hooking up our scanner, we noticed erratic data coming from the PCM. Instead of chasing more phantom sensor issues, we identified the root cause: the PCM itself was failing. We installed a VIN-programmed module just like this one, performed the quick security relearn, and the truck immediately ran and shifted perfectly. It saved the customer time, money, and a lot of frustration by addressing the core problem directly.
Is Your Vehicle Showing Signs of PCM Failure?
A failing GM PCM 16250279 can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your PCM is the likely culprit:
- ✔ Check Engine Light: The light is on, and you may have codes related to sensors, emissions, or internal module failure.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation during acceleration, or rough idling.
- ✔ Reduced Fuel Economy: The engine isn’t running efficiently, causing you to visit the gas station more often.
- ✔ Intermittent Stalling: The engine cuts out unexpectedly while driving or when coming to a stop.
- ✔ No-Start Condition: The engine cranks but refuses to start, often due to a lack of fuel injector or ignition coil commands from the PCM.
- ✔ Harsh or Erratic Shifting: The transmission may shift hard, slip between gears, or get stuck in one gear (limp mode).
- ✔ Failed Emissions Test: The PCM controls the emissions systems, and a fault will prevent you from passing inspection.
The VIN Programming Advantage
Your vehicle is unique. The specific engine, transmission, axle ratio, and even tire size are all coded into the original PCM’s software. Our process ensures this replacement module is a perfect digital clone for your truck or van. By providing your VIN during checkout, you guarantee that the GM PCM 16250279 you receive will control all systems exactly as the factory intended. This eliminates compatibility guesswork and ensures a smooth installation process. Once installed, the only step required is a simple security relearn procedure that you can do yourself in your driveway—no special tools needed.
Installation and Security Relearn
Installation is straightforward. First, disconnect the vehicle’s battery. Locate your old PCM (typically in the engine bay), disconnect the electrical connectors, and unbolt it. Bolt the new module in its place, reconnect the connectors, and then reconnect the battery. Now, you must perform the security relearn:
- Turn the key to the “ON” position (do not start the engine).
- Observe the “Security” or lock icon light on the dashboard. It will be on or flashing.
- Leave the key in the “ON” position for approximately 10-11 minutes, until the security light turns off.
- Turn the key to the “OFF” position for 10 seconds.
- Repeat steps 1-4 two more times for a total of three 10-minute cycles.
- After the third cycle, the vehicle has relearned the new PCM, and you can now start the engine.
This simple procedure syncs the new module with your vehicle’s anti-theft system, saving you from a costly towing bill and dealership labor charges. Restore your vehicle’s reliability and drive with confidence. Order your pre-programmed GM PCM 16250279 today.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you place your order, and the module will arrive ready for installation and the security relearn procedure.
What is the security relearn procedure?
It’s a simple, tool-free process that syncs the new PCM to your vehicle’s anti-theft system. It involves cycling the ignition key on and off in a specific 30-minute sequence, as detailed in the installation instructions above. Anyone can do it in their own driveway.
Will this PCM fix my transmission problems?
In many cases, yes. The Powertrain Control Module (PCM) controls both engine and transmission functions. If your shifting problems are caused by faulty electronic commands, this replacement module can resolve them. It is a very common solution for electronically-induced transmission issues in these vehicles.
Where 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 part difficult to install?
No, the physical installation is typically very simple, requiring only basic hand tools to unbolt the old module and install the new one. The most important part of the process is performing the security relearn correctly after the physical installation is complete.
What happens if I forget to provide my VIN?
We cannot ship your order without a VIN. Programming is essential for the module to function in your vehicle. Our customer service team will contact you to obtain the VIN, but providing it at checkout ensures the fastest possible processing and shipping of your part.