Restore Peak Performance to Your GM Truck or Van
Is your 1999-2000 GMC 2500, or another compatible GM vehicle, suffering from perplexing engine issues? A faulty Powertrain Control Module (PCM) is often the culprit behind problems like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition. As the central computer for your engine and transmission, the PCM’s health is critical for your vehicle’s reliability and performance. This replacement PCM, part number 16263494, is the definitive solution to get your vehicle running like new again.
We take the guesswork out of the repair. Unlike a generic module from a parts store, this unit is professionally programmed specifically for your vehicle using your unique Vehicle Identification Number (VIN). This crucial step ensures that the module has the latest GM software updates and is perfectly calibrated to your vehicle’s specific engine, transmission, and options. The result is a seamless, plug-and-play installation that restores factory performance and efficiency.
From the Diagnostic Bay
We had a 2000 Chevy Express van come in with a complaint of intermittent stalling at stoplights. No codes were stored, and every sensor tested perfectly. After hours of chasing wires, we hooked up a scope to the ignition control module signal. We found that the signal from the PCM would occasionally drop out for a millisecond, just long enough to kill the engine without setting a fault. It was a classic case of an internal PCM failure that a standard scanner would miss. Replacing the PCM with a properly programmed unit solved the problem instantly, saving the customer from replacing countless unnecessary parts.
Symptoms of a Failing Powertrain Control Module
- ✔ Check Engine Light is illuminated with various trouble codes.
- ✔ Your vehicle fails to start or experiences hard starting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Misfire codes (e.g., P0300, P0301) that aren’t resolved by new plugs or wires.
- ✔ Communication errors with diagnostic scan tools.
The Critical Role of VIN Programming
Ordering a 1999-2000 GMC 2500 PCM without proper programming is a recipe for frustration. The PCM controls everything from fuel injector pulse width and ignition timing to transmission shift points and emissions equipment. Using your VIN, we load the exact software your vehicle was designed to run on, including any factory improvements released by GM over the years. This guarantees compatibility and avoids the common issues associated with unprogrammed or incorrectly programmed modules.
This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940. It fits a wide range of GM trucks and vans from the late 90s and early 2000s, including the Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, Express, Savana, and more. Please verify the extensive fitment list to confirm compatibility with your specific vehicle.
Don’t let a faulty computer keep your truck off the road. This professionally programmed PCM is the most reliable and effective way to solve complex electronic issues and restore the dependable performance you rely on. Simply provide your VIN after purchase, and we’ll handle the programming before shipping it directly to you.
Frequently Asked Questions
Why is my vehicle’s VIN required?
Your VIN allows us to program the PCM with the exact software calibration for your vehicle’s engine, transmission, and factory options. This ensures perfect compatibility and function without any additional programming required on your end.
Is this module difficult to install?
The physical installation is typically straightforward. On most trucks and vans, the PCM is located in the engine bay and is held in place by a few bolts. After disconnecting the battery, you simply unplug the old module and plug in the new one. The most important part, the software programming, is already done for you.
Will I need to perform any procedures after installation?
In many cases, the vehicle will start and run perfectly after installation. However, some GM vehicles of this era may require a security relearn procedure (often called Passlock or VATS) and/or a Crankshaft Position Sensor (CASE) relearn. These procedures are simple and can often be done without special tools. Instructions can be readily found online for your specific model.
How can I be sure my old PCM is the problem?
While the symptoms listed are common indicators of PCM failure, it’s always best to have a proper diagnosis performed. A qualified mechanic can rule out other potential causes like faulty sensors, wiring issues, or fuel delivery problems before you replace the module.
What if my original part number is slightly different?
This module is a direct replacement for several part numbers, including 16263494, 16265035, and 8162634940. As long as your vehicle is on the compatibility list and your original part number is one of the listed interchanges, this module will work perfectly once programmed to your VIN.