Is Your GM Truck or Van Experiencing Frustrating Issues?
If you’re dealing with a persistent check engine light, erratic engine behavior, harsh transmission shifts, or even a no-start condition, the root cause is often a failing Powertrain Control Module (PCM). As the central computer for your vehicle’s engine and transmission, the PCM is responsible for managing everything from fuel injection and ignition timing to emission controls and shift points. When it begins to fail, it can cause a cascade of problems that are difficult to diagnose and can leave your vehicle unreliable.
The Direct-Fit Solution for Your Vehicle
This Powertrain Control Module is the definitive solution for a wide range of GM trucks and vans, including the Chevrolet Express, GMC Savana, S10, Blazer, and many more. It’s a direct replacement for OEM part numbers 16263494, 16265035, and 8162634940. We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store or salvage yard, this unit comes fully programmed specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) during checkout. Our technicians will flash the module with the latest, most stable software updates directly from GM. This ensures not only perfect compatibility but also resolves many of the original factory software bugs that may have existed.
From the Diagnostic Bay
We had a 2001 GMC Savana 2500 in the shop that was a nightmare for its owner, a local contractor. It would randomly stall at traffic lights and had a transmission that shifted so hard it felt like being rear-ended. The owner had already replaced the fuel pump and multiple sensors with no luck. After hooking up our scanner, we saw communication dropouts with the PCM. We installed one of our VIN-programmed modules, performed the quick security relearn, and the van ran like it just rolled off the assembly line. Smooth idle, crisp shifts—problem solved. It’s a classic case of symptoms pointing everywhere, but the real issue was the vehicle’s brain.
Common Symptoms of a Failing GM PCM 16263494
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Failure to communicate with diagnostic scan tools.
- ✔ Inaccurate or non-functioning dashboard gauges.
Plug-and-Play Installation Process
Replacing your PCM shouldn’t require a trip to the dealership. Because we program the module before shipping, the installation is straightforward for any DIY mechanic. Simply disconnect the negative battery terminal, locate your existing module (often in the engine bay on the driver’s or passenger’s side), carefully unplug the wiring harnesses, unbolt the old unit, and install the new one in its place. Once everything is reconnected, you may need to perform a simple security relearn procedure, which can typically be done without special tools. This process pairs the new module to your vehicle’s anti-theft system and gets you back on the road quickly.
Don’t let a faulty computer keep your reliable GM truck or van off the road. Restore its performance, efficiency, and dependability with a module that’s programmed to work perfectly from the moment you install it. Provide your VIN and let us handle the complex part, so you can enjoy a simple, effective repair.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows us to access the exact factory software and calibration files for your specific vehicle’s engine, transmission, and options. Programming the PCM with this data ensures it works seamlessly, just like the original, and has the latest GM updates.
Is this part difficult to install?
For most individuals with basic mechanical skills, the installation is straightforward. It involves disconnecting the battery, unplugging the electrical connectors, removing a few bolts, and swapping the module. The most important part is ensuring the connectors are seated properly upon reinstallation.
Will I need to do anything after installation?
In many GM vehicles of this era, you will need to perform a security relearn procedure (also known as a CASE relearn or Passlock relearn). This syncs the new PCM with your vehicle’s anti-theft system. The procedure is simple and can usually be done with just the ignition key, taking about 30 minutes. Instructions are widely available online for your specific model.
How do I find my VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on the vehicle itself. Look for a small metal plate on the driver’s side of the dashboard near the windshield, or on the driver’s side door jamb sticker.
How can I be sure this fits my vehicle?
This module fits a wide range of GM vehicles. Please review the detailed fitment list on this page. The most critical step is to match one of the compatible part numbers (e.g., 16263494) to the number on your existing module. Providing your VIN ensures we program it correctly for your exact model.