Is Your GM Truck or Van Experiencing Frustrating Engine Problems?
If your late 90s or early 2000s Chevrolet, GMC, or Isuzu is suffering from a check engine light that won’t go away, poor performance, erratic shifting, or even a no-start condition, the culprit is often a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points. When it begins to fail, it can create a cascade of issues that are difficult to diagnose and can make your vehicle unreliable.
From the Diagnostic Bay
We recently had a 2000 Chevy Express van towed to our shop. The owner had replaced the fuel pump, spark plugs, and ignition coil, but it still had a persistent stalling issue and a communication error code (U-code). After confirming power and ground to the PCM were good, we connected a scope and saw a noisy, inconsistent data signal from the module itself. The internal processors were failing. We installed one of our VIN-programmed modules, performed the security relearn, and the van fired right up and ran perfectly. The owner had spent over $600 on unnecessary parts before addressing the real problem: the PCM.
Symptoms of a Failing Powertrain Control Module
A faulty PCM can manifest in many ways. If you’re noticing any of the following symptoms, it’s a strong indicator that your vehicle’s main computer needs attention:
- ✔ Persistent Check Engine Light (CEL) with communication or processor-related fault codes.
- ✔ Unexplained drops in fuel efficiency.
- ✔ The engine runs rough, misfires, or stalls intermittently.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ The vehicle cranks but refuses to start.
- ✔ Failure to pass state emissions testing due to readiness monitor issues.
- ✔ Other warning lights on the dash may illuminate without a clear cause.
The Direct-Fit Solution: A Pre-Programmed Chevy 2500 PCM
Don’t let a bad computer keep your reliable truck or van off the road. This Powertrain Control Module is the definitive solution to restore your vehicle’s performance and reliability. We eliminate the guesswork and the need for expensive dealership programming. When you order from us, you receive a module that has been meticulously tested and flashed with the latest official GM software updates, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures that all factory parameters for your engine, transmission, and options are perfectly matched.
This module is a direct replacement for part number 16263494 and is also compatible with several other service numbers, including 16265035, 8162634940, 218-11787, and 21811787. It fits a wide range of popular GM models, including the Chevrolet Silverado, Express, Tahoe, S10, and Astro, as well as the GMC Sierra, Savana, Yukon, and many more. Please review the detailed fitment list to confirm compatibility with your specific vehicle.
Our Simple, Hassle-Free Process
- ✔ Place Your Order: Add this module to your cart and complete your purchase.
- ✔ Provide Your VIN: After ordering, simply send us your 17-digit VIN. This is crucial for us to program the module correctly.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We handle all the programming for you before we ship the part. It will arrive flashed with the latest GM software for your specific VIN, making it ready for installation.
Where do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Is this part difficult to install?
Installation is typically very simple. It involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then reversing the process with the new one. The most common locations are in the engine bay, often near the battery or firewall.
What is the security relearn procedure?
This is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system. It usually involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. We can provide detailed instructions upon request.
How can I be sure this fits my vehicle?
This module replaces part number 16263494 and several others. Please check the detailed fitment list on this page. As long as your vehicle is on the list and we have your correct VIN, we guarantee it will be programmed to work correctly.