Restore Peak Performance to Your GM Truck or Van
Is your 1998-1999 GMC 2500, or another compatible GM vehicle, suffering from erratic engine behavior, a persistent check engine light, or a no-start condition? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the root cause. This vital component manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a wide range of frustrating and performance-robbing issues. This listing offers a reliable and cost-effective solution: a genuine, used OEM PCM, meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN).
From the Diagnostic Bay
We had a ’99 Chevy Suburban come in that had its owner pulling his hair out. The truck would randomly stall at stoplights and had a laundry list of communication error codes. The owner had already replaced the fuel pump and ignition coil based on advice from online forums. Before condemning the PCM, we did a full diagnostic. We found a corroded ground wire on the engine block, just below the driver-side cylinder head. After cleaning the connection point and re-securing the ground, all the symptoms vanished. This is a crucial reminder: Always verify main power and ground connections to the PCM before replacing it. A 10-minute check can save you hundreds of dollars and a lot of headaches.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light: The light is on, and you may have codes related to PCM internal failure or communication errors (like P0600-P0606).
- ✔ Engine Performance Issues: You might experience rough idling, stalling, hesitation during acceleration, misfires, or a significant drop in fuel economy.
- ✔ No-Start or Intermittent Start: The engine cranks but won’t start, or it only starts sporadically. This can be due to the PCM not commanding fuel or spark.
- ✔ Transmission Problems: The PCM also controls transmission functions. A faulty module can lead to harsh shifting, getting stuck in one gear (limp mode), or incorrect shift points.
- ✔ Failed Emissions Test: An improperly functioning PCM can’t manage the emissions systems correctly, leading to an automatic failure at the inspection station.
The Right Solution for Your 1998-1999 GMC 2500 PCM
Replacing the PCM in these classic GM trucks isn’t just about swapping boxes. Each module is programmed with software specific to the vehicle’s engine, transmission, and options. Our service eliminates the guesswork and the need for expensive dealership programming. We take a quality, inspected used PCM and flash it with the latest GM-authorized software updates using your vehicle’s VIN. This ensures that the module you receive is a direct-fit, plug-and-play replacement, ready to restore your vehicle’s original drivability and performance.
Simple Process:
- Purchase this PCM.
- Provide us with your 17-digit VIN during or after checkout.
- We program the module with the correct software for your vehicle.
- We ship the ready-to-install PCM directly to you.
Wide-Ranging Compatibility
This Electronic Control Module is a direct replacement for multiple part numbers, including 16258815, 09355699, 16266645, 9355699, 16250279, 09366810, and 9366810. It fits an extensive range of GM trucks, vans, and SUVs from the late 90s. Please verify your part number or consult the detailed fitment list below to ensure compatibility with your specific make, model, and engine option.
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming is the process of loading a vehicle-specific software file onto the PCM. This file tells the computer about your truck’s engine size, transmission type, tire size, and other critical parameters. Without the correct programming, the vehicle will not start or run properly. We handle this for you so the part is ready to install.
Will I need to do anything after I install this computer?
In most cases, you will need to perform a security relearn procedure, often called a VATS or Passlock relearn. This syncs the new PCM with your vehicle’s anti-theft system. It’s a simple procedure that typically involves turning the key on and off in a specific sequence and can be done without any special tools. Instructions are widely available online for your specific model.
Where do I provide my VIN?
You can add your 17-digit VIN in the notes section during checkout or send it to us in a message after you complete your purchase. We cannot ship the module until we have your VIN to ensure correct programming.
Is this a new part?
No, this is a high-quality, tested, and inspected used OEM part sourced from a salvaged vehicle. This provides an affordable and reliable alternative to a costly new module from the dealership.
How do I confirm this is the right part for my truck?
The best way is to match the service number on your current PCM to one of the compatible numbers listed (e.g., 16258815 or 09355699). You can also use the detailed fitment list provided in the description to match your year, make, model, and engine.